org.jetbrains.kotlin:kotlin-power-assert

Releases

1. 2.1.10-RC9 Jan 2025pre-release
   Release notes

   Changelog

   Compiler

   • KT-73454 K2: Fix type parameters mapping for typealiases with inner RHS
   • KT-73043 K2 Compiler does not allow references to inner constructors with typealiases
   • KT-73339 K2: "VerifyError: Bad type on operand stack" because of missing implicit cast on generic field receiver with star projection
   • KT-72585 K2: Compilation failure when upgrading to Kotlin 2.0.20+: Cannot replace top-level type with star projection: S
   • KT-73399 compile-time JVM codegen failure on a KProperty argument of a KSuspendFunction parameter
   • KT-72725 KMP: Unsupported actualization of inherited java field in expect class
   • KT-73153 K2: Standalone diagnostics on type arguments are not reported

   Compose compiler

   • CMP-5680 Compose compiler: unexpected stability warnings for classes compiled with 2.0.10

   IR. Inlining

   • KT-73981 Cherry-pick the fix for KT-73482 to 2.1.10

   JavaScript

   • KT-58797 Optimize the code generated for objects on JS and Wasm backends
   • KT-70778 Kotlin Js companion is undefined in production build
   • KT-73130 KJS: Missed break for do/while in generated JS code

   Klibs

   • KT-73951 Workaround for "Partial linkage engine may not patch some discrepancies in IR when compiling Kotlin/Native static caches" in 2.1.10

   Native

   • KT-73559 K/Native: AndroidNativeArm64 linking fails starting from Kotlin 2.1.0

   Tools. CLI

   • KT-73967 JDK 25: "IllegalArgumentException: 25-ea" with EA builds

   Tools. Daemon

   • KT-73311 "Unable to release compile session, maybe daemon is already down" flakiness

   Tools. Gradle

   • KT-73728 'generatePomFileForMavenPublication' creates pom with dependencies with 'unspecified' version

   Tools. Gradle. Multiplatform

   • KT-73620 KMP 2.1.0: Transitive dependency is broken when setting publication groupId

   Tools. Gradle. Native

   • KT-73572 [Gradle] kotlin.native.cacheKind=none doesn't work anymore
   • KT-62826 Show a warning when KGP and K/N versions mismatch
   • KT-71419 Light bundle KGP IT run against a stable K/N version

   Open source →
2. 2.1.027 Nov 2024
   Release notes

   Changelog

   Analysis API

   New Features

   • KT-68603 KotlinDirectInheritorsProvider: add an option to ignore non-kotlin results

   Performance Improvements

   • KT-70757 Performance problem in KaFirVisibilityChecker for KaFirPsiJavaClassSymbol

   Fixes

   • KT-70437 Class reference is not resolvable
   • KT-57733 Analysis API: Use optimized ModuleWithDependenciesScopes in combined symbol providers
   • KT-72389 K2: False positive "Redundant 'protected' modifier" for protected property inside protected constructor from private or internal class
   • KT-69190 K2: False-positive "redundant private modifier"
   • KT-64984 Analysis API: Support Wasm target
   • KT-70375 K2: NPE at org.jetbrains.kotlin.analysis.api.fir.symbols.KaFirNamedClassSymbolBase.createPointer
   • KT-71259 K2 evaluator: Invalid smart cast info collecting for Code Fragments
   • KT-69360 Lack of implicit receiver for the last statement under lambda in scripts
   • KT-70890 Analysis API: Experiment with weak references to LL FIR/analysis sessions in session caches
   • KT-70657 Analysis API: Inner types from classes with generics are incorrectly represented by the compiled jars
   • KT-71055 Suspend calls inside 'analyze()' break the block guarantees
   • KT-70815 Analysis API: Implement stop-the-world session invalidation
   • KT-69819 K2 IDE: LHS type in callable references is unresolved when it has type arguments and is qualified
   • KT-68761 Analysis API: Experiment with limited-size cache in KaFirSessionProvider
   • KT-70384 Analysis API Standalone: The same class in the same two renamed jars is unresolved
   • KT-71067 Exceptions from references cancel Find Usages
   • KT-69535 Redesign 'containingSymbol'
   • KT-71025 K2 IDE: Scopes in "importingScopeContext" have reversed ordering and "indexInTower" values
   • KT-67483 K2 IDE: Serializable plugin causes infinite resolve recursion when there is a star import from a class with annotation call
   • KT-69416 K2 IDE / Completion: “No classifier found” on simple value creating
   • KT-70257 CCE: class kotlin.UInt cannot be cast to class java.lang.Number
   • KT-70376 K2 IDE / Kotlin Debugger: IAE “Only componentN functions should be cached this way, but got: toString” on evaluating toString() method for value class
   • KT-70264 AA: service registration via XML fails with AbstractMethodError in Lint CLI
   • KT-69950 Analysis API: Introduce isSubtypeOf(ClassId)
   • KT-68625 K2: “lazyResolveToPhase(STATUS) cannot be called from a transformer with a phase STATUS.”
   • KT-67665 K2: contract violation for value class with a constructor parameter with an implicit type
   • KT-67009 Analysis API: Add abbreviated type tests for type aliases from source modules
   • KT-69977 KaFirFunctionalType#getAbbreviation is always null
   • KT-68341 Analysis API: Expanded function types from libraries don't have an abbreviated type
   • KT-68857 Analysis API: Refactor annotations
   • KT-70386 Do not filter out overloads from different libraries in dangling files
   • KT-65552 K2: CANNOT_CHECK_FOR_ERASED in KtTypeCodeFragment
   • KT-65803 K2: Analysis API: KtFirTypeProvider#getSubstitutedSuperTypes throws an exception in the case of "Wrong number of type arguments"
   • KT-68896 Support VirtualFile binary dependency inputs to Analysis API modules
   • KT-69395 K2 IDE: incorrect overload selection from binary dependencies in a shared native source set
   • KT-68573 ISE: "Unexpected constant value (kotlin/annotation/AnnotationTarget, CLASS)" at Kt1DescUtilsKt.toKtConstantValue()
   • KT-69576 Analysis API: FIR implementation of "isImplicitReferenceToCompanion" returns false for companion references in implicit invoke operator calls
   • KT-69568 Analysis API: FIR implementation of "isImplicitReferenceToCompanion" returns true for non-companion references in qualified calls
   • KT-69436 Analysis API Platform: Encapsulate LLFirDeclarationModificationService as an engine service
   • KT-63004 K2: Analysis API: Design API for querying declarations generated by compiler plugins (similar to indices)
   • KT-69452 AA FIR: wrong source PSI after compile-time evaluation
   • KT-69598 AA: definitely not-null type at receiver position should be wrapped in parenthesis
   • KT-60484 Analysis API: add support for KtType pointers similar to KtSymbolPointer
   • KT-68884 Analysis API: Rename/deprecate/remove declarations as part of Stabilization
   • KT-69453 AA FIR: miss to handle expected type of lambda with explicit label
   • KT-69533 Protect implementation parts of Analysis API with opt-in annotations

   Analysis API. FIR

   Performance Improvements

   • KT-71566 FirElementBuilder#getFirForNonKtFileElement should iterate a Psi file over and over
   • KT-71224 Analysis API: FirElementFinder.collectDesignationPath relies on naive iteration through FIR files

   Fixes

   • KT-70327 Analysis API: Batch inspection causes deadlock in ValueWithPostCompute
   • KT-69070 Analysis API: Querying declared member scope for Java symbols results in exception in some use cases
   • KT-68268 LLSealedInheritorsProvider: reduce scope to kotlin files
   • KT-69671 TYPES phase contract violation through JavaSymbolProvider
   • KT-70624 Declaration symbols from code fragments are treated as not local
   • KT-70662 NPE: FirLazyBodiesCalculatorKt.calculateLazyBodyForProperty
   • KT-70859 Do not fail highlighting due to resolution problems
   • KT-70474 FirLazyResolveContractViolationException from JavaSymbolProvider
   • KT-70323 FirLazyResolveContractViolationException: lazyResolveToPhase(TYPES) cannot be called from a transformer with a phase TYPES
   • KT-71567 LLFirCompilerRequiredAnnotationsTargetResolver should calculate annotation arguments on demand
   • KT-71584 getNonLocalContainingOrThisDeclaration treats KtParameter from functional type as non-local

   Analysis API. Light Classes

   Performance Improvements

   • KT-69998 Drop redundant cache from ClassInnerStuffCache

   Fixes

   • KT-69833 Support value classes
   • KT-71693 Wrong name mangling for JvmField class property and companion property clash
   • KT-71469 KtLightClassForDecompiledDeclaration: missed kotlinOrigin
   • KT-70710 Provide light classes for KMP modules in Android Lint
   • KT-70548 SLC: text of class object access expression is not the same as raw text
   • KT-70572 SLC: missing isInheritor implementation for type parameter
   • KT-70491 SLC: inconsistent source PSI of no-arg constructor for all default values
   • KT-70458 SLC: missed auxiliaryOriginalElement for delegated property
   • KT-70232 Support a companion object inside value classes
   • KT-70349 @delegate:` annotations are missed for light class fields
   • KT-68328 Move KtLightClassBase to ULC

   Analysis API. Providers and Caches

   • KT-65618 K2: resulted FirClass.psi != requested PsiClass from completion
   • KT-69292 K2: Analysis API: A property's MUST_BE_INITIALIZED diagnostic is not updated after changing field usage in an accessor
   • KT-71468 Drop redundant logic from LLFirJavaFacadeForBinaries
   • KT-71700 Cache result of resolveToCall
   • KT-71520 Analysis API: LLFirNativeForwardDeclarationsSymbolProvider spends a lot of time in indices

   Analysis API. Standalone

   • KT-65110 Analysis API: In Standalone mode the order of symbols is unstable

   Analysis API. Stubs and Decompilation

   • KT-71565 KtClassOrObject should use isLocal from greenStub

   Analysis API. Surface

   New Features

   • KT-69960 resolveToCallCandidates should support operators
   • KT-69961 resolveToCallCandidates should support properties

   Performance Improvements

   • KT-70529 KaSymbol: reduce the number of cached usages
   • KT-70165 Introduce PSI-based KaSymbols for K2

   Fixes

   • KT-69371 Analysis API: expose only interfaces/abstract classes for the resolution API
   • KT-69696 KaSymbolByFirBuilder should filter call-site substitutions
   • KT-69679 KaDelegatedConstructorCall should have substituted signature
   • KT-70206 anonymousSymbol API throws an exception for regular functions
   • KT-69699 Receiver type is not substituted in the case of conflict declarations
   • KT-69381 Analysis API: Investigate the viability of current KaSymbol caches
   • KT-70199 K2: ConcurrentModificationException at FirCallCompleter$LambdaAnalyzerImpl.analyzeAndGetLambdaReturnArguments
   • KT-70661 Invalid FirDeclarationOrigin ScriptTopLevelDestructuringDeclarationContainer
   • KT-70663 KaFirDestructuringDeclarationSymbol: Failed requirement
   • KT-63490 Analysis API: Accessing the Analysis API should be prohibited during dumb mode
   • KT-63390 K2: Analysis API: add annotations to KtClassInitializerSymbol
   • KT-55124 Design common ancestor for KtValueParameter and KtReceiverParameterSymbol
   • KT-71731 directlyOverridenSymbols/allOverridenSymbols works incorrectly for intersection overrides

   Apple Ecosystem

   • KT-66262 Deprecate and remove support for bitcode embedding from the Kotlin Gradle plugin
   • KT-66894 XCFramework task fails when name passed to xcframework DSL is different from framework's name
   • KT-65675 XCFrameworkTask produces an xcframework with mismatched casing in embedded frameworks
   • KT-69119 xcodeVersion task fails if Xcode isn't installed and apple-specific native targets aren't declared

   Backend. Wasm

   New Features

   • KT-70786 Improve DX of the variable view during debugging in Chrome/Firefox for Kotlin/Wasm
   • KT-70331 Support incremental compilation for the Wasm backend
   • KT-71686 K/Wasm: Add functions to convert between Kotlin and JS array types
   • KT-68185 [WasmJs] Attach js exception object to JsException

   Fixes

   • KT-71294 Wasm Artifacts/Resource are being loaded relatively instead of absolutely
   • KT-71473 K/Wasm: Use --closed-world and related options for Binaryen
   • KT-72297 [Wasm] Unused associated object class lead to compiler fail
   • KT-72156 custom-formatters.js exists in JAR after publishToMavenLocal but not in the published artifact in Maven public
   • KT-65799 K/Wasm: remove default exports from wasm exports
   • KT-71800 Wasm compiler: Fix member generation for data classes with an array-type property
   • KT-71580 String::toFloat on wasm behaves differently compared to other targets
   • KT-71523 K/Wasm: cleanup after fix for KT-71474
   • KT-71475 K/Wasm: KClass::qualifiedName returns incorrect result for nested or companion objects
   • KT-71474 K/Wasm: KProperty*Impl equals work incorrectly for clabbale reference created in different files or modules
   • KT-61130 K/Wasm: Function signatures may clash with base class internal methods from a friend module
   • KT-70820 [Kotlin QG] wasm-validator fails when running compile[...]KotlinWasmJsOptimize
   • KT-70819 [Kotlin QG] node.js fails when running wasmJs[...]Test KGP tasks
   • KT-70394 Investigate increased wasm binary size after switching stdlib compilation to K2
   • KT-69627 Remove create###Array functions from WASM stdlib
   • KT-68509 Fatal: error validating input in compileProductionExecutableKotlinWasmJsOptimize

   Compiler

   New Features

   • KT-71094 Kotlin/Native incremental compilation: fail compilation if cache build failed
   • KT-21908 Support 'when' exhaustiveness checking for generic type parameter with sealed class upper bound
   • KT-70679 Kotlin/Native: fill WritableTypeInfo from Swift Export type mapping
   • KT-59798 Builder inference is not working when combined with let expression
   • KT-54227 Cannot use nullable Nothing as reified type parameter
   • KT-71430 Kotlin-to-Java direct actualization implementation
   • KT-68163 Expose supplementary compiler warnings via CLI
   • KT-69321 Swift export: enable auto-linkage of binary dependencies
   • KT-11526 Improve diagnostics for "X overrides nothing"
   • KT-49710 False positive NO_ELSE_IN_WHEN with nullable type as receiver
   • KT-69729 Support calling super interface Java methods from Kotlin interface
   • KT-69508 Improve "Public-API inline function cannot access non-public-API" check for the inline property accessors

   Performance Improvements

   • KT-71353 FP Kotlin performance degradation (around Cone types hierarchy changes)
   • KT-71159 [K2] OOM on large enum classes with fields
   • KT-69718 K2: Check for jvm nullability annotations in fir2ir is slow
   • KT-68417 Native: LLVM 16 inliner is slow on K/N-produced modules
   • KT-63971 K2: Redundant @ParameterName in abbreviated type in metadata

   Fixes

   • KT-71550 JVM IR: NPE on identity equals of boolean true with null
   • KT-72214 -fpass-plugin (clangFlags) is not applied since Kotlin 2.0.20
   • KT-68933 CompilationException: Back-end: Could not get inlined class
   • KT-72255 Promote jspecify from warning to error
   • KT-73065 CCE with context receivers
   • KT-61033 K2: implement a diagnostic corresponding to K1's MISSING_BUILT_IN_DECLARATION
   • KT-72345 K2: Method 'get' without @Override annotation not called
   • KT-71260 K2: Internal compiler error in IrFakeOverrideSymbolBase.getOwner when there is no actual for expect
   • KT-72996 false-positive unresolved reference error on an overloaded callable reference in a lambda return position on the left-hand size of an elvis operator
   • KT-72552 AutoboxingTransformer fails on during linkage on nested lambdas with cinteroped types
   • KT-71751 K2: Skipping code in last statement of lambda
   • KT-71121 Kotlin/JS incremental compilation fails with KotlinIllegalArgumentExceptionWithAttachments
   • KT-60521 Drop language versions 1.4 and 1.5
   • KT-70461 K2: "Inline class types should have the same representation" caused by value class and smart check
   • KT-72238 Argument type mismatch in builder inside extension function after ?:
   • KT-70306 K2: Lambdas are unserializable: inferred from Java param ? super I
   • KT-67383 Incorrect optimisation when optimising for loop with UByte
   • KT-68653 Switch latest stable language version in Kotlin project to 2.1
   • KT-71708 False negative UNSUPPORTED for collection literals as trailing return value
   • KT-72281 K/N: "Failed to wait for cache to be built"
   • KT-72017 Enum property reflection returning null KClassifier property for Enum classes defined inside Kotlin Scripts
   • KT-69040 PCLA: deal with "deep" calls that can be fully analyzed properly
   • KT-69920 K2: java.lang.IllegalArgumentException: FirNamedArgumentExpressionImpl.replaceConeTypeOrNull() during Space project compilation
   • KT-69549 Try to move callable reference transformation earlier in pipeline
   • KT-63944 Kotlin/Native: Cache flavor selection doesn't respect GC kind
   • KT-71649 K2: Put operator on mutableMap<T?, V>() causes crashes on null key
   • KT-70667 K2: "Type parameter * has inconsistent bounds" caused by wildcard and where-clause
   • KT-70562 @SubclassOptInRequired cannot accept multiple experimental marker
   • KT-69407 K2: Compiler crash (Shouldn't be here) due to unresolved reference in FirProjectionRelationChecker
   • KT-71508 JAVA_CLASS_INHERITS_KT_PRIVATE_CLASS isn't reported when java class is inherited from an effectively private class
   • KT-72178 K2: "Unexpected FirPlaceholderProjectionImpl" exception when using "_" as key type in EnumMap
   • KT-70407 Error/warning message for @SubclassOptInRequired-annotated class should provide more context
   • KT-72302 K2: no error on type operator in annotation parameter default value
   • KT-58820 OPT_IN_USAGE_ERROR's message text does not account for SubclassOptInRequired
   • KT-71662 PCLA: a type variable is not fixed on demand to a type containing a not-fixed type variable
   • KT-69739 K2: "KotlinIllegalArgumentExceptionWithAttachments: Unexpected FirPlaceholderProjectionImpl" caused by unresolved references
   • KT-72154 Dokka fails with not array: KClass<out Annotation> on Kotlin 2.1.20-dev with @SubclassOptInRequired
   • KT-70756 K2. Compiler crash with FileAnalysisException on incorrect symbol in nesting lambda
   • KT-72173 K2: simple object names from root package are resolved without imports in non-root packages when used as values
   • KT-71480 JAVA_CLASS_INHERITS_KT_PRIVATE_CLASS isn't reported while java object isn't created
   • KT-71034 Failing compiler/testData/codegen/box/inlineClasses/kt70461.kt
   • KT-71016 K/Wasm: Failing compiler/testData/codegen/box/inlineClasses/kt70461.kt
   • KT-52469 Deprecate reified type parameter instantiating into intersection types
   • KT-71753 PCLA: false-negative operator ambiguity error on fixing a type variable on demand for an operator assignment
   • KT-59871 K2: Fix introduced diagnostics
   • KT-71563 'llegalStateException: Source classes should be created separately before referencing' when actualized through typealias and java direct actualization
   • KT-64741 Avoid leaking ConeTypeVariable types in diagnostics from PCLA
   • KT-60447 Builder inference fails to infer generic type argument from local class
   • KT-69170 K2: "Unresolved reference" caused by generics and fun interfaces
   • KT-71756 K2 evaluator: broken resolve of private members during debug of Kotlin project itself
   • KT-68893 Invalid annotation in contract crashes with K2
   • KT-71490 K2: missing REDUNDANT_ELSE_IN_WHEN
   • KT-64403 Implement BlackBoxCodegenTestSpecGenerated for K2
   • KT-71551 JVM IR K1: NPE on generating a function imported from an object from another module
   • KT-71210 K2: false negative FUNCTION_CALL_EXPECTED / NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE with companion objects
   • KT-71528 K2/JVM: ClassCastException around Array<Nothing?>
   • KT-71228 K2: "IllegalArgumentException: Failed requirement" caused by lambda parameter and class type
   • KT-71738 K2: False negative REDECLARATION inside object expression
   • KT-71701 K2: false positive CAN_BE_VAL with lateinit and non-in-place lambda
   • KT-68694 K2 IDE / Kotlin Debugger: AE “Unresolved reference: <HIDDEN: samples/gen/classes/enum class/EnumClass.lam is invisible” on evaluating private lambda inside enum entry
   • KT-70970 K2 IDE / Kotlin Debugger: AE “Only assignable IrValues can be set” on calling overloaded inc() operator on interface
   • KT-70824 K2: NoSuchFieldException when evaluating private extension property
   • KT-70390 K2 IDE / Kotlin Debugger: can't invoke lambda from private class during evaluation
   • KT-68701 K2 IDE / Kotlin Debugger: AE “ERROR_CALL 'Unresolved reference: <HIDDEN: /privateLambda is invisible>#' type=IrErrorType(null)” on evaluating private top-level lambda
   • KT-68695 K2 IDE / Kotlin Debugger: AE “Unsupported callable reference” on evaluating ::lateinitStr on private lateinit property
   • KT-70861 K2 IDE / Kotlin Debugger: can't evaluate Clazz::class call for private class
   • KT-34911 Improve error message for WRONG_ANNOTATION_TARGET: list applicable targets
   • KT-71601 K2: When with a subject of type dynamic always considered exhaustive
   • KT-33091 Kotlin/Native: Compiler crashes if an external class is declared
   • KT-59651 K1/K2: Assertion error on external enum usage attempt
   • KT-69939 Extract a category of internal FIR checkers from supplementary FIR checkers
   • KT-70850 Pull down typeArguments from ConeKotlinType to ConeClassLikeType
   • KT-71117 K2: "IllegalArgumentException: No type for StarProjection" with star projection and function type
   • KT-71251 Native & JS K2: Missing check for calling isInitialized inside inline fun
   • KT-70161 Native: extracting LLVM 16 on Linux makes the compiler print many "Ignoring unknown extended header keyword 'LIBARCHIVE.creationtime'" messages
   • KT-71215 K2: UB due to the erroneous greening of the red code with multiple delegation with java
   • KT-59386 K2: Missing CONSTANT_EXPECTED_TYPE_MISMATCH
   • KT-69564 Make using -Xuse-k2 compiler flag an error
   • KT-69756 TypeOfLowering: don't create constant object nodes before inlining
   • KT-66328 K2: implement an error for KT-66324
   • KT-71046 K/N: a separate lowering to convert function reference to IrConstantObject
   • KT-69223 Drop parallel lowering mode in JVM backend
   • KT-70260 @JsPlainObject: improve compiler error if a method is present
   • KT-67739 Improve error message when JDK used in -Xjdk-release has corrupted class files
   • KT-63964 K2: different naming of classes defined in script in metadata
   • KT-70014 Common inference: introduce rigidTypeMarker
   • KT-71352 Cannot load script definition class org.gradle.kotlin.dsl.KotlinProjectScriptTemplate
   • KT-63502 Getting java.lang.ClassNotFoundException: javaslang.λ during compilation
   • KT-66316 Kotlin/Native: make @Escapes annotation required for all external functions
   • KT-69653 Prohibit exposing types via type parameters' bounds
   • KT-68451 Inconsistent rules of CFA in enum initialization block
   • KT-70893 K2: Bogus NO_COMPANION_OBJECT on resolve to private qualifier
   • KT-70965 FIR/AA: Initializers for Java annotation arguments mapping capture use-site sessions
   • KT-63945 K2: Prevent possible diagnostic loss
   • KT-64453 K2: Implement ComposeLikeIr...TestGenerated for K2
   • KT-30424 Confusing error message "modality is different"
   • KT-70846 Replace ConeKotlinType.nullability with isMarkedNullable on specific types
   • KT-56720 K2: false positive MANY_IMPL_MEMBER_NOT_IMPLEMENTED in case of delegation in diamond inheritance
   • KT-69937 Define & enforce user-friendly terminology for extended checkers
   • KT-64406 K2: Implement CompileKotlinAgainstJavaTestGenerated for K2
   • KT-69938 Validate sets of default compiler warnings and supplementary compiler warnings
   • KT-68971 Investigate suspicious fragmentation of FIR trees for string literals with interpolation
   • KT-71073 Multi-dollar strings: parser grabs too much if backticks follow a short sequence of '$'
   • KT-71213 Rethrow exceptions in checkers with some useful attachments
   • KT-70395 K2: "Captured Type does not have a classifier" caused by out type and interface hierarchy
   • KT-70133 K2: false negative UNINITIALIZED_VARIABLE when postponed lambda is created before initialization
   • KT-70625 K2: ClassCastException caused by function reference, star projection and invariant type parameter
   • KT-70835 K2: "TYPE_MISMATCH" caused by operator assignment
   • KT-70366 K2: "KotlinIllegalArgumentExceptionWithAttachments: Failed to find functional supertype for class "
   • KT-68834 Parentheses don't influence calls of any convention operators (except invoke operator) after safe navigation operator
   • KT-70358 K2: "java.lang.IllegalArgumentException: No type for StarProjection" when using a star projection on a function type
   • KT-69298 K2: "Initializer type mismatch" caused by elvis operator type inference for nullable typealias
   • KT-71189 K2: emit 'DELEGATE_SPECIAL_FUNCTION_MISSING' and 'DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE' on 'by' keyword
   • KT-71178 K2: False negative NO_ELSE_IN_WHEN in when over nullable type with !is Nothing? check
   • KT-70812 False positive NO_ELSE_IN_WHEN with nullable type argument as subject
   • KT-70947 False positive NO_ELSE_IN_WHEN with DNN subject and nullable sealed class upper bound
   • KT-70752 Review diagnostics with whole declaration as range
   • KT-71160 K2: Rendering of flexible collection types and arrays is too verbose
   • KT-61227 Definitely non-nullable types cause "Any was expected" for @Nullable parameter
   • KT-69389 K2: NONE_APPLICABLE instead of more useful "type mismatch" error with overloads and parameter nullability mismatch
   • KT-69829 Missed UNRESOLVED_LABEL for label in returns and loops
   • KT-61223 JDK 21: new addFirst/addLast and putFirst/putLast methods allow adding nullable value for non-null types
   • KT-66742 Supertypes with inaccessible type arguments are allowed
   • KT-62906 Type system: consider changing simple type & DNN type relation
   • KT-70104 Update the error message for calling super Java interface methods case
   • KT-69794 K2: Wrong target is reported for EXPOSED_SUPER_INTERFACE diagnostic
   • KT-70724 False-positive UNINITIALIZED_VARIABLE for inline constructor with late-initialized variables
   • KT-70749 False-positive UNINITIALIZED_VARIABLE for inline fun with crossinline modifier
   • KT-65805 Migrate builtins serializer to K2
   • KT-71004 FirSignatureEnhancement#enhance mutates attributes on the original function
   • KT-70813 Questionable behavior for calls on ILT receivers
   • KT-70208 'when' is not exhaustive for expect Boolean
   • KT-69210 Native: tune LLVM optimization pipeline
   • KT-70753 K2: Missing non-null assertion on the return value of try-catch block
   • KT-70012 EXTENSION_SHADOWED_BY_MEMBER shouldn't be reported for actual declarations
   • KT-70837 K2. "Expected FirResolvedTypeRef with ConeKotlinType but was FirImplicitTypeRefImplWithoutSource" on incorrect call with extension fun
   • KT-66751 Implement a general deprecation of types with inaccessible type arguments
   • KT-68748 K2: Remove irFactory from Fir2IrComponents
   • KT-61659 K2: Implement the EXTENSION_SHADOWED_BY_MEMBER warning
   • KT-70709 Range for MUST_BE_INITIALIZED shouldn't include property annotations
   • KT-63294 Do not use duplicated compiler argument names across the codebase
   • KT-70673 False positive NO_ELSE_IN_WHEN with nullable Boolean as subject
   • KT-70672 False positive NO_ELSE_IN_WHEN with nullable Enum as subject
   • KT-69207 Native: use lld when the compiler produces binaries for a Linux target
   • KT-67696 Native: compiler crashes when loading an LLVM bitcode file of unsupported version
   • KT-69767 K2: Investigate differences in tests without alias behavior for cyclic expansion
   • KT-70617 K2: ClassCastException caused by Java enum with overridden name property
   • KT-68796 Non-first invoke operator calls break chained calls of convention operators after safe navigation operator
   • KT-67772 K2: Metadata misses NoInfer annotation for unsafeCast result
   • KT-70304 [FIR2IR] Missing @NoInfer
   • KT-65085 K2: Get rid of special check for unresolved array literals on argument mapping phase
   • KT-65066 K1 crashes, K2 doesn't report type mismatch on array literal inside nested annotation call
   • KT-49235 Kotlin interface limited to 1000 super types
   • KT-69991 K2/JVM: Backend crash with functional types and KFunctions
   • KT-7461 Forbid using projection modifiers inside top-level Array in annotation's value parameter
   • KT-52315 Legacy keywords (header, impl) break enum definitions
   • KT-69499 Native: aggressive inline of runtime procedures causes compiler crash in debug builds
   • KT-69737 Native: incompatible target-cpu attributes between runtime and Kotlin code
   • KT-69911 Unexpected line numbers in default setter
   • KT-61529 K2: Unexpected FirClassLikeSymbol null with -no-jdk
   • KT-69475 K2: No "Name contains illegal characters" for package name with dots inside
   • KT-69484 Native: remove default values for isObjectType
   • KT-70352 K2: False-negative CONFLICTING_UPPER_BOUNDS on Nothing bound
   • KT-59781 K2: investigate implicit cast generation in fir2ir vs psi2ir
   • KT-70036 [FIR2IR] Fix param name in overridden setter
   • KT-68718 [JVM] Generic function is instantiated with wrong type argument
   • KT-67983 K2: False negative "Recursive type alias in expansion" at recursive typealiases
   • KT-70328 K2: @UnsafeVariance stored in the metadata despite the Source retention
   • KT-70313 K2: Don't add Any supertype to kotlin.Nothing compiled from sources
   • KT-69982 K2: New errors when executing :kotlin-stdlib:jvmJar
   • KT-70169 K2: implement a deprecation error for Synchronized, Throws, JvmField on annotation parameters
   • KT-67651 K2: inconsistency in behavior for SAM constructor with flexible type
   • KT-63857 K2: Extra operator modifier in metadata
   • KT-70182 K2: Set up isOperator flag according to operator naming conventions during building synthetic overrides for Java methods
   • KT-20798 Implement a deprecation warning for reified modifier on type parameters of type alias
   • KT-68697 K2 IDE / Kotlin Debugger: NSEE “List is empty.” when method reference is used in some place in code
   • KT-70157 K2: false positive JAVA_CLASS_INHERITS_KT_PRIVATE_CLASS for a Java private class
   • KT-68702 K2 IDE: AE “SyntheticAccessorLowering should not attempt to modify other files!” on evaluating of supermethods toString() and hashCode()
   • KT-69509 K2 IDE / Kotlin Debugger: exception in lowering ReplaceKFunctionInvokeWithFunctionInvoke when compiling code fragment
   • KT-66323 K2: Clarify contracts of ConeSubstitutorByMap
   • KT-69652 K2: False positive "Redundant visibility modifier" with explicitApi()
   • KT-65815 K2: False-positive NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY with inline function returning Nothing?
   • KT-60508 K2/stdlib: compilation of common code fails if built-in types are provided as platform sources
   • KT-70037 K2: Generate IR body for Any constructor despite that fact it's empty
   • KT-69870 K2: False positive NO_VALUE_FOR_PARAMETER for override without default but base with default and with enabled KMP
   • KT-69599 K2: Investiage and fix lots of UNRESOLVED_REFERENCE during building stdlib native with K2
   • KT-68375 K2: FirPrimaryConstructorSuperTypeChecker fails on generated superclasses
   • KT-58309 Deal with test failures inside FirTypeEnhancementTestGenerated
   • KT-27112 Implement prohibition of exposing types via type parameters' bounds
   • KT-69831 Add long FastJarFS tests to the nightlyFirCompilerTest configuration
   • KT-69537 K2: Unintentional behavior caused by InferMoreImplicationsFromBooleanExpressions
   • KT-59814 K2: Explore why FirDataFlowAnalyzer strips away value parameters of non top-level-functions
   • KT-69069 K2: expect overloads are deprioritized in common code
   • KT-69511 KJS / K2: False positive IMPLICIT_BOXING_IN_IDENTITY_EQUALS when comparing dynamic with primitive
   • KT-69500 Native: introduce an option to inline less "ALWAYS_INLINE" runtime procedures
   • KT-69717 K2: Don't call coneType/coneTypeOrNull extensions on FirResolvedTypeRef
   • KT-60440 K2/Java: investigate constructor own type parameters enhancement
   • KT-69871 K2 allows modifier keywords on package declaration
   • KT-61271 Frontend: "The label does not denote a loop." error message is used even if the label does denote a loop
   • KT-69768 K2: Investigate differences in tests without alias behavior with typealias to enum entry
   • KT-63846 K2: incorrect type argument inferred for smart cast value of a generic type
   • KT-69774 Don't report overload resolution ambiguity if extension receiver contains error type
   • KT-61316 K2: Consider throwing exception when replaceType is called on special FirExpressions with immutable types
   • KT-69201 Discard expect candidate in overload conflict resolver if there is no actual
   • KT-69557 K2: Investigate failures with enabled assertion in ConeResolvedAtom constructor
   • KT-69783 K2: Make FirTypeProjection sealed
   • KT-68000 Investigate getting container functions in checkers
   • KT-69649 K2: Cleanup various utilities about toSymbol conversion
   • KT-69185 K2: Prepare a test runner for diagnostic tests with type aliases non-expanded automatically
   • KT-69390 UNRESOLVED_REFERENCE on call with lambda argument turns whole call red
   • KT-68794 K2 IDE / Kotlin Debugger: ISE “No real overrides for FUN FAKE_OVERRIDE name:privateFun visibility:private modality:FINAL” on calling private function from superclass in debugger
   • KT-69315 FirJavaGenericVarianceViolationTypeChecker: StackOverflowError
   • KT-49962 "Visibility inherited is not allowed in forVisibility" when analyzing broken file
   • KT-24212 Report "This class shouldn't be used in Kotlin" on calling constructor of Java class with Kotlin analog
   • KT-64195 K2: Consider make FirAnonymousInitializer. containingDeclarationSymbol not null
   • KT-64254 "Projections are not allowed on type arguments of functions and properties": Type-project type arguments of properties
   • KT-40533 Error message PROPERTY_WITH_NO_TYPE_NO_INITIALIZER for interface property is not fully correct
   • KT-20014 Improve diagnostics for lateinit property without initializer and type annotation
   • KT-51366 False positive error "Value class cannot extend classes" when extending generic interface with wrong number of type arguments
   • KT-68277 K2: false positive UNREACHABLE_CODE for non-local return/break
   • KT-69544 K2: Mapped Java @Target annotation's vararg argument has swapped type and elementType
   • KT-68998 K2: Refactor postponed atoms
   • KT-69288 Native: Apple LLVM 16 fork can't read bitcode with memory attribute produced by upstream LLVM 16
   • KT-67808 K2: Inconsistent properties initialization analysis in init blocks in presence of smartcast on this
   • KT-69035 K2: Investigate potential removal of FirMangler
   • KT-69473 Missing suspend-conversion for lambda in the last statement of when with expected type
   • KT-64640 Prevent mutating SequenceCollection methods from JDK 21 be available on read-only collections
   • KT-65441 K1: Remove JDK 21 getFirst()/getLast() in (Mutable)List interfaces
   • KT-54792 Store program order of properties inside @kotlin.Metadata
   • KT-59832 K2: Fix the TODO about merging values for labels in UnusedChecker

   Compose compiler

   New features

   • b/328817808 Added the PausableComposition feature flags
   • 83c48a0 Decoy support for JS target is removed from Compose compiler

   Fixes

   • CMP-6926 iOS compilation failure: Unresolved reference 'copy'
   • CMP-6842 FAKE_OVERRIDE declarations are not preserved in metadata and should not be marked with annotations
   • CMP-6788 non-private field compilation warnings (stableprop & ComposableSingletons)
   • CMP-6685 Native/WASM compilation failure on Composable function with value-type arg + return
   • b/376058538 Fix stack overflow when inferring stability of indirect generic loop
   • b/339322843 Transform @Composable property delegate references
   • b/366040842, b/365066530 Replace deep copy in Compose plugin with in-place type mutation
   • b/329477544 Force open / overridden Composable functions to be non-restartable.
   • b/361652128 Disable live literal transform if the corresponding flag is disabled
   • b/325004814 [Compose] Fix infinite recursion in target analysis
   • b/357878245 Disallow open @Composable functions with default params to fix binary compatibility issues.
   • b/338597078 [Compose] Fix target warning message
   • b/351858979 Fix stability inferencing of interfaces on incremental compilation
   • b/346821372 [Compose] Fix code generation for group optimization
   • b/339311821 Give warning when stability configuration file is not found
   • b/346821372 Fixes group generation for if statements when nonSkippingGroupOptimization is enabled.

   IDE. Gradle Integration

   • KT-48554 [Multiplatform Import] Ensure consistency between GradleImportProperties and PropertiesProvider

   IR. Actualizer

   • KT-71631 Kotlin-to-Java direct actualization: java annotation element isn't actualized
   • KT-71597 Kotlin-to-Java direct actualization: it is possible to actualize a function with default parameters
   • KT-71592 Kotlin-to-Java direct actualization: constructor of nested class can't be actualized
   • KT-71577 Kotlin-to-Java direct actualization: method can be actualized by java static method
   • KT-69632 K2: Expect actual mismatch on actualization with alias to expect class
   • KT-71817 Actualization of static members is broken for non-JVM platforms

   IR. Inlining

   New Features

   • KT-69527 Set the right visibility for synthetic accessors in SyntheticAccessorLowering

   Fixes

   • KT-71232 Implement an IR validation check that ensures that all IrFields are private on non-JVM backends
   • KT-69307 Source offsets seem incorrect after IR inlining
   • KT-72884 Internal error in body lowering: IllegalStateException: Can't inline given reference, it should've been lowered
   • KT-71659 IR Inliner fails to inline function expressions due to implicit cast from the 1st phase of inlining
   • KT-69681 IR: Report warnings on exposure of private types in non-private inline functions
   • KT-72521 Kotlin/Native: java.lang.AssertionError: kfun:androidx.compose.runtime#access$<get-androidx_compose_runtime_ProvidedValue$stable>$p$tComposerKt(){}kotlin.Int
   • KT-72623 Don't generate synthetic accessors in files other than the one being lowered
   • KT-70420 Enable double-inlining in Native & JS backends by default
   • KT-67292 Handling assertions before the IR inliner
   • KT-70423 KLIB: SyntheticAccessorLowering - generate static factory functions instead of synthetic constructors
   • KT-69565 Don't generate synthetic accessors for private symbols inside local classes
   • KT-69787 Handle clashes of synthetic accessors generated for top-level callables
   • KT-71137 Generate synthetic accessors for backing fields
   • KT-67172 Native & JS: Introduce OuterThisInInlineFunctionsSpecialAccessorLowering
   • KT-64865 Explicitly generate accessors for private declarations in inline functions
   • KT-71657 K/JS: Double-inlining causes failures in IC with top-level synthetic accessors
   • KT-71078 Inline all functions in local classes at the 1st stage of inlining
   • KT-69802 Don't extract local classes from inline functions in double inlining mode
   • KT-66508 IR inliner: Add implicit cast for initializer of temporary variables
   • KT-66507 IR inliner: Enable implicit casts in all KLib backends
   • KT-69466 IrInlinedFunctionBlock: Refactor it to make it possible to serialize in KLIBs
   • KT-69317 IR Inlining. Try to place inlined arguments outside IrInlinedFunctionBlock
   • KT-67149 Common Native/JS lowering prefix at the 2nd phase of compilation
   • KT-69172 Implement double-inlining for Native
   • KT-67304 Keep in common prefix: Shared variables + local classes in inline lambdas
   • KT-67170 ArrayConstructorReferenceLowering is missing in Native
   • KT-70583 Internal error in body lowering: java.lang.IllegalStateException: An attempt to generate an accessor after all accessors have been already added to their containers
   • KT-69700 Inline stub_for_inlining use sites survive after the inliner
   • KT-69462 Support dumping IR after inlining in compiler tests
   • KT-70693 IR: replace IrReturnableBlock.inlineFucntion with IrInlinedFunctionBlock.inlineFucntion
   • KT-70763 IR inline: consider storing stub_for_inline as an inlined function for callable reference
   • KT-69168 Wrap assertion calls before IR inliner
   • KT-69167 Create intrinsics in stdlib for handling assertions in KLIB-based backends
   • KT-69169 Expand assertion intrinsics in backend based on CLI parameters
   • KT-69174 Implement the basic Synthetic Accessors Lowering for KLIB-based backends

   IR. Interpreter

   • KT-70388 K2 IDE / Kotlin Debugger: InterpreterError “Unsupported number of arguments for invocation as builtin function: INT_MAX_POWER_OF_TWO” during evaluation

   IR. Tree

   Fixes

   • KT-69644 Report warning on cross-file IrGetField operations generated by compiler plugins
   • KT-68789 Prepare tests for testing visibility (non-)violation in inlined IR
   • KT-71826 stdlib fails to compile with -Xserialize-ir=all
   • KT-70333 IR: remove ability to apply compiler plugins during KAPT stub generation phase
   • KT-67752 Make copyRemappedTypeArgumentsFrom and transformValueArguments methods in DeepCopyIrTreeWithSymbols protected instead of private
   • KT-68151 Setup testing visibility of referenced declarations in IR
   • KT-68988 [Tests] Streamline the order of irFiles in IR- and Kotlin-like dumps
   • KT-65773 Auto generate IR implementation classes
   • KT-70330 Automatically keep track of IrValueParameter.index
   • KT-68495 Compile-time failure on bounded generic value used in a contains-check with range
   • KT-68974 Validate scopes of IrValueParameters in IrValidator

   JavaScript

   New Features

   • KT-70254 K/JS: Generate arrows in ES6 mode instead of anonymous functions
   • KT-70283 KJS / ES6: Don't generate bind(this) calls for anonymous functions that capture this

   Fixes

   • KT-43567 KJS: toString() method and string interpolation of variable produce different code
   • KT-70533 KJS: changed string concatenation behavior in 2.0
   • KT-14013 JS toString produces different result for nullable/non-nullable ref to the same array
   • KT-72732 KJS / ES6: "SyntaxError: 'super' keyword unexpected here" with enabled -Xir-generate-inline-anonymous-functions and disabled arrow functions
   • KT-69408 [JS] Enable insertAdditionalImplicitCasts=true (as in other KLIB-based backends)
   • KT-71821 K/JS tests are failing with coroutines flow and turbine on timeout
   • KT-31799 Allow non-identifier characters in Kotlin/JS (backquoted properties, @JsName)
   • KT-55869 Coroutine is not intercepted, when the coroutine is started calling startCoroutineUninterceptedOrReturn using callable reference
   • KT-70117 Generate debug info for code from js call
   • KT-69642 ES generator-based coroutines rely on eval
   • KT-67452 K2: Consider hiding dynamic type creation under FlexibleTypeFactory for JS only
   • KT-70226 Delete JS tests that were only run with the legacy JS backend
   • KT-71338 K/JS: Add a flag for switching generating arrow functions on & off
   • KT-69173 Implement double-inlining for JS
   • KT-67327 JS: Remove error tolerance
   • KT-69892 Array.isArray() returns false for an instance returned by KtList.asReadonlyArrayView()
   • KT-70231 Delete the org.jetbrains.kotlin.cli.js.dce.K2JSDce class
   • KT-69928 KJS: keys() and values() of KtMap's JS view don't behave as expected
   • KT-70707 KJS: asJsReadonlyMapView does not implement ReadonlyMap correctly
   • KT-71220 Fix invalid IrFunctionReference creation in InnerClassConstructorCallsLowering
   • KT-70393 Investigate failing JS test after switch stdlib compilation to K2
   • KT-64429 K2: Implement KlibJsIrTextTestCaseGenerated for K2
   • KT-69587 [Tests] Fix multi-module deserialization in JS irText tests
   • KT-70219 Delete the org.jetbrains.kotlin.cli.js.K2JSCompiler class
   • KT-70221 Rename org.jetbrains.kotlin.cli.js.K2JsIrCompiler to K2JSCompiler
   • KT-70229 Remove test classes related to the legacy JS backend
   • KT-70359 Remove legacy backend-related test directives from Kotlin/JS tests
   • KT-70362 Clean up Gradle tasks for running JS tests against the legacy JS backend
   • KT-66181 Reorganize JsCodeOutliningLowering and keep it before the IR inliner
   • KT-30016 JS BE does not generate special bridge methods
   • KT-68975 KJS: Investigate calling js(...) from inline functions

   KMM Plugin

   • KT-71011 AS KMP plugin: ios application can't start for 2024.2.1

   Klibs

   New Features

   • KT-64169 [KLIB Resolve] Don't skip libraries that happen to have the same unique_name
   • KT-68322 Compiler (JS, Wasm): warn about incompatible Kotlin stdlib/compiler pair

   Fixes

   • KT-61098 [KLIB Resolve] Don't allow working with KLIB "repositories"
   • KT-72965 Ignore subclassOptInRequired constructor warning
   • KT-68792 Bump KLIB ABI version in 2.1
   • KT-67474 K2: Missing @ExtensionFunctionType in metadata in KLIBs
   • KT-71633 [2.1.0] Suspicious "Argument type mismatch" error
   • KT-70146 [KLIB Resolve] Don't fail on nonexistent transitive dependency
   • KT-71455 [KLIB Resolve] Forbid passing KLIB unique names via CLI
   • KT-67448 [KLIB Resolve] Deprecate passing KLIB unique names via CLI
   • KT-67450 [KLIB Resolve] Kotlin/Native: Only one implicit repository should remain for the compiler ("dist")
   • KT-70285 Warning about incompatible stdlib (JS/Wasm) is not reported if stdlib is unpacked
   • KT-66218 Clean-up the code for serialization & deserialization of DFGs to & from KLIBs
   • KT-71414 KotlinLibraryResolver.resolveWithDependencies was evolved in binary incompatible way
   • KT-68195 move KlibMetadataProtoBuf to frondend-independent module

   Language Design

   • KT-54617 Stabilize @SubclassOptInRequired: ability to require opt-in for interface implementation
   • KT-54458 Preview of non-local break and continue
   • KT-69924 Mention 'if' guard when '&&' is used incorrectly
   • KT-71222 Remove @ExperimentalSubclassOptIn from SubclassOptInRequired
   • KT-67675 Allow usage of Array<Nothing?>
   • KT-70754 Changes in typeOf behaviour for Kotlin/Native
   • KT-58659 Prohibit implementing a var property with an inherited val property

   Libraries

   Performance Improvements

   • KT-66715 Performance: faster alternative to String.lines()

   Fixes

   • KT-71628 Review deprecations in stdlib for 2.1
   • KT-69545 Kotlin/Native: Deprecate API marked with FreezingIsDeprecated to error
   • KT-56076 K2: build Kotlin standard library
   • KT-71660 Stabilize experimental API for 2.1
   • KT-54299 Extract org.w3c declarations to separate library from K/Wasm Stdlib
   • KT-68027 Document caveats and deincentivise usage of measureTimeMillis
   • KT-71581 Update outdated documentation to common lazy and provide samples
   • KT-71796 Improve documentation for Path.walk and Path.visitFileTree functions
   • KT-68019 Fill in missing package descriptions for standard library documentation
   • KT-52181 Native: Inconsistent behaviour of LinkedHashMap#entries on JVM and Native
   • KT-71570 Document suspend lambda builder
   • KT-65526 Rewrite builtins as expect-actual
   • KT-68502 K2: Fix or suppress stdlib K2 warnings
   • KT-68731 K2: Handle some formally incompatible expect/actual classes in JVM stdlib
   • KT-70378 Implement custom serialization for Uuid
   • KT-70005 K/Wasm and K/Native: IntArray.sort - array element access out of bounds
   • KT-66764 kotlinx-benchmark: rework on kotlin-compiler-embeddable
   • KT-69817 Set up klib binary API validation for stdlib
   • KT-68396 Handle some formally incompatible top-level expects/actuals callables
   • KT-69524 kotlin.uuid.Uuid: checkHyphenAt - error message always specified index 8
   • KT-69327 [native] FloatingPointParser.initialParse works incorrectly for some inputs
   • KT-46785 Get rid of !! after readLine() in the standard library

   Native

   • KT-71435 Native: cannot access class 'objcnames.classes.Protocol'
   • KT-49279 Kotlin/Native: update LLVM from 11.1.0 to 16.0.0
   • KT-61299 Native: patch LLVM to prevent it from using signal handlers incompatibly with JVM
   • KT-69637 Native: our LLVM shouldn't advise submitting bugs to the upstream
   • KT-64636 kotlin.incremental.native=true causes IrLinkageError
   • KT-69142 ObsoleteWorkersApi and FreezingIsDeprecated is not displayed on targets in webdocs

   Native. Build Infrastructure

   • KT-71820 Update the coroutines version used in kotlin-native build infrastructure
   • KT-69479 Native: remove custom python version building from the LLVM builder container image
   • KT-63214 [K/N] llvm build script fails with MacOSX14.0.sdk sysroot

   Native. ObjC Export

   • KT-62997 IllegalStateException for hashCode(): KClass for Objective-C classes is not supported yet
   • KT-59497 KClass.simpleName returns null in ObjC-inherited class

   Native. Platform Libraries

   • KT-70032 Rebuild platform libraries in 2.1.0 with Xcode 16
   • KT-69448 LLVM 16 clang with Xcode 16 headers: 'sys/cdefs.h' file not found

   Native. Runtime

   • KT-70680 Kotlin/Native: Use WritableTypeInfo when creating Swift wrapper from the runtime
   • KT-70568 Native: revert workaround for debug with LLVM 16
   • KT-67730 Native: fix runtime compilation warnings after update to LLVM 16

   Native. Runtime. Memory

   • KT-72624 Native: testRelease_on_unattached_thread sometimes fails with Releasing StableRef with rc 0
   • KT-71401 K/N: CMS barrier can be executed on an unregisterred thread
   • KT-70364 Kotlin/Native: data race during GC initialization
   • KT-68544 [Native] Implement heap dump tool
   • KT-70365 Kotlin/Native: make thread id be pointer size

   Native. Swift Export

   New Features

   • KT-71539 Swift Export: export class member overrides
   • KT-70442 Swift Export: export class inheritance
   • KT-68864 Refactor internal details of swift-export-standalone

   Fixes

   • KT-70678 Swift Export: generate Kotlin<->Swift type mapping
   • KT-70920 Swift Export Nullability: primitive type
   • KT-71087 Swift Export: Nullability: Never
   • KT-71086 Swift Export: Nullability: Strings
   • KT-70919 Swift Export Nullability: reference type
   • KT-71026 Swift Export: function overloading with ref types does not work
   • KT-70960 Swift Export nullability: add nullability to sir and printer
   • KT-70063 Swift export generates invalid Swift code for class and function with the same name
   • KT-70069 Swift export: filter out extension properties
   • KT-70068 Swift export: nullable types are not marked as unsupported
   • KT-69287 Swift Export: support leaking dependencies
   • KT-69633 Provide interface for multiple module translation
   • KT-69286 [Swift Export][TestInfra] Support translating multiple roots
   • KT-69376 Property with Any type does not force addition of import

   Reflection

   • KT-71378 KotlinReflectionInternalError: Inconsistent number of parameters in the descriptor and Java reflection object

   Specification

   • KT-53427 Specify @SubclassOptInRequired

   Tools. CLI

   New Features

   • KT-8087 Make it possible to suppress warnings globally in compiler (via command-line option)
   • KT-71537 Add JVM target bytecode version 23

   Fixes

   • KT-70991 K2: Compilation fails if project version has a comma
   • KT-70179 K2: Building a file with kotlin-test-junit without junit does not include annotations
   • KT-72311 KotlinCliJavaFileManagerImpl caches empty result and broke repeated analyses
   • KT-61745 K2: support light tree in multi-module chunk mode
   • KT-70885 Errors are not reported for wrong arguments in -Xsuppress-warning flag for non-jvm backends
   • KT-69541 K2: "IllegalArgumentException: Unexpected versionNeededToExtract" on using JAR packaged as ZIP64
   • KT-69434 K2: Kotlin compiler JarFS can't handle large dependencies (>2GB)
   • KT-70959 K2: Support legacy metadata jar format in K2 compiler
   • KT-70337 Obsolete code is not removed after refactoring - JvmEnvironmentConfigurator.registerModuleDependencies
   • KT-70322 Merge CLITool and CLICompiler classes

   Tools. CLI. Native

   • KT-68673 Kotlin/Native "You have not specified any compilation arguments. No output has been produced" when no source nor -Xinclude is passed

   Tools. Compiler Plugins

   Fixes

   • KT-72804 Regression in Kotlin 2.1.0: compilation fails when building iOS
   • KT-72824 Kotlin power-assert plugin StringIndexOutOfBoundsException
   • KT-71658 Transform top-level atomic properties to Java boxed atomics
   • KT-65645 Atomicfu-plugin: compilation hangs on a long string concatenation
   • KT-69038 Power-Assert does not display const vals
   • KT-71525 Settin

   Note truncated.

   Open source →
3. 2.1.0-RC218 Nov 2024pre-release
   Release notes

   Changelog

   Compiler

   • KT-72345 K2: Method 'get' without @Override annotation not called
   • KT-73065 CCE with context receivers
   • KT-72996 false-positive unresolved reference error on an overloaded callable reference in a lambda return position on the left-hand size of an elvis operator

   Compose compiler

   • CMP-6926 iOS compilation failure: Unresolved reference 'copy'

   IR. Inlining

   • KT-72884 Internal error in body lowering: IllegalStateException: Can't inline given reference, it should've been lowered

   JavaScript

   • KT-70533 KJS: changed string concatenation behavior in 2.0
   • KT-14013 JS toString produces different result for nullable/non-nullable ref to the same array
   • KT-43567 KJS: toString() method and string interpolation of variable produce different code
   • KT-72732 KJS / ES6: "SyntaxError: 'super' keyword unexpected here" with enabled -Xir-generate-inline-anonymous-functions and disabled arrow functions

   Klibs

   • KT-72965 Ignore subclassOptInRequired constructor warning

   Tools. Compiler Plugins

   • KT-72804 Regression in Kotlin 2.1.0: compilation fails when building iOS
   • KT-72824 Kotlin power-assert plugin StringIndexOutOfBoundsException

   Tools. Gradle

   • KT-47897 Official Kotlin Gradle plugin api
   • KT-58858 Add KDoc documentation for Kotlin Gradle plugin API
   • KT-73076 Kotlin Gradle Plugin API Reference: adjust settings
   • KT-70543 Gradle: create migration guide for those who are using Kotlin compiler classes indirectly available in buildscripts

   Open source →
4. 2.1.0-RC3 Nov 2024pre-release
   Release notes

   Changelog

   Backend. Wasm

   • KT-72297 [Wasm] Unused associated object class lead to compiler fail

   Compiler

   • KT-72281 K/N: "Failed to wait for cache to be built"
   • KT-72238 Argument type mismatch in builder inside extension function after ?:
   • KT-71751 K2: Skipping code in last statement of lambda
   • KT-72552 AutoboxingTransformer fails on during linkage on nested lambdas with cinteroped types
   • KT-71649 K2: Put operator on mutableMap<T?, V>() causes crashes on null key
   • KT-71508 JAVA_CLASS_INHERITS_KT_PRIVATE_CLASS isn't reported when java class is inherited from an effectively private class
   • KT-72178 K2: "Unexpected FirPlaceholderProjectionImpl" exception when using "_" as key type in EnumMap
   • KT-72302 K2: no error on type operator in annotation parameter default value
   • KT-72173 K2: simple object names from root package are resolved without imports in non-root packages when used as values

   Compose compiler

   • b/376058538 Fix stack overflow when inferring stability of indirect generic loop
   • b/339322843 Transform @Composable property delegate references

   IR. Inlining

   • KT-72521 Kotlin/Native: java.lang.AssertionError: kfun:androidx.compose.runtime#access$<get-androidx_compose_runtime_ProvidedValue$stable>$p$tComposerKt(){}kotlin.Int
   • KT-72623 Don't generate synthetic accessors in files other than the one being lowered

   IR. Interpreter

   • KT-72356 K2 Native: IllegalStateException when annotation has the same source range as a constant in another file

   Native. Runtime. Memory

   • KT-71401 K/N: CMS barrier can be executed on an unregisterred thread

   Tools. CLI

   • KT-72311 KotlinCliJavaFileManagerImpl caches empty result and broke repeated analyses

   Tools. Daemon

   • KT-72530 The daemon has terminated unexpectedly on startup attempt #1 with error code: Unknown

   Tools. Gradle

   • KT-72467 kotlin.sourceSets extension not added for KotlinBaseApiPlugin.createKotlinAndroidExtension()
   • KT-72495 Warn about kotlin-compiler-embeddable loaded along KGP
   • KT-72387 KGP 2.1.0-RC-227 changes cause KSP to crash calling produceUnpackedKlib
   • KT-72303 KGP 2.1.0-Beta2 broke compatibility with KSP
   • KT-72651 Unable to use target for KotlinBaseApiPlugin.createKotlin(Jvm/Android)Extension()

   Tools. Gradle. Multiplatform

   • KT-72454 Revert changes made in KT-69899 i.e. make kotlin.android.buildTypeAttribute.keep = false by default again

   Tools. Gradle. Native

   • KT-72366 KGP 2.1.0-Beta2 doesn't download kotlin-native-prebuilt when running Dokka
   • KT-71051 K/N dependencies are re-downloaded multiple times on Windows

   Tools. JPS

   • KT-68565 K2: IllegalStateException: Source classes should be created separately before referencing

   Tools. Kapt

   • KT-71776 K2 Kapt in 2.1.0-Beta1 fails with e: java.lang.IllegalStateException: FIR symbol "class org.jetbrains.kotlin.fir.symbols.impl.FirValueParameterSymbol" is not supported in constant evaluation

   Open source →
5. 2.1.0-Beta214 Oct 2024pre-release
   Release notes

   Changelog

   Analysis API. Caches and Invalidation

   • KT-71700 Cache result of resolveToCall
   • KT-71520 Analysis API: LLFirNativeForwardDeclarationsSymbolProvider spends a lot of time in indices

   Analysis API. Lazy Resolution

   • KT-71567 LLFirCompilerRequiredAnnotationsTargetResolver should calculate annotation arguments on demand
   • KT-71584 getNonLocalContainingOrThisDeclaration treats KtParameter from functional type as non-local
   • KT-71566 FirElementBuilder#getFirForNonKtFileElement should iterate a Psi file over and over
   • KT-71224 Analysis API: FirElementFinder.collectDesignationPath relies on naive iteration through FIR files

   Analysis API. Light Classes

   • KT-71693 Wrong name mangling for JvmField class property and companion property clash
   • KT-71469 KtLightClassForDecompiledDeclaration: missed kotlinOrigin

   Analysis API. Stubs and Decompilation

   • KT-71565 KtClassOrObject should use isLocal from greenStub

   Analysis API. Surface

   • KT-71731 directlyOverridenSymbols/allOverridenSymbols works incorrectly for intersection overrides

   Analysis. API

   Performance Improvements

   • KT-70165 Introduce PSI-based KaSymbols for K2

   Fixes

   • KT-64984 Analysis API: Support Wasm target
   • KT-70375 K2: NPE at org.jetbrains.kotlin.analysis.api.fir.symbols.KaFirNamedClassSymbolBase.createPointer
   • KT-57733 Analysis API: Use optimized ModuleWithDependenciesScopes in combined symbol providers
   • KT-70437 Class reference is not resolvable
   • KT-70327 Analysis API: Batch inspection causes deadlock in ValueWithPostCompute
   • KT-71259 K2 evaluator: Invalid smart cast info collecting for Code Fragments
   • KT-65110 Analysis API: In Standalone mode the order of symbols is unstable
   • KT-71468 Drop redundant logic from LLFirJavaFacadeForBinaries
   • KT-70890 Analysis API: Experiment with weak references to LL FIR/analysis sessions in session caches
   • KT-70474 FirLazyResolveContractViolationException from JavaSymbolProvider
   • KT-70657 Analysis API: Inner types from classes with generics are incorrectly represented by the compiled jars
   • KT-71055 Suspend calls inside 'analyze()' break the block guarantees
   • KT-70815 Analysis API: Implement stop-the-world session invalidation
   • KT-69819 K2 IDE: LHS type in callable references is unresolved when it has type arguments and is qualified
   • KT-68761 Analysis API: Experiment with limited-size cache in KaFirSessionProvider
   • KT-70384 Analysis API Standalone: The same class in the same two renamed jars is unresolved
   • KT-71067 Exceptions from references cancel Find Usages
   • KT-69190 K2: False-positive "redundant private modifier"
   • KT-63390 K2: Analysis API: add annotations to KtClassInitializerSymbol
   • KT-71025 K2 IDE: Scopes in "importingScopeContext" have reversed ordering and "indexInTower" values

   Apple Ecosystem

   • KT-69093 Xcode 16 support in Kotlin
   • KT-66894 XCFramework task fails when name passed to xcframework DSL is different from framework's name
   • KT-65675 XCFrameworkTask produces an xcframework with mismatched casing in embedded frameworks

   Backend. Native. Debug

   • KT-71374 lldb: step out breaks breaking in Xcode 16

   Backend. Wasm

   • KT-72156 custom-formatters.js exists in JAR after publishToMavenLocal but not in the published artifact in Maven public
   • KT-70331 Support incremental compilation for the Wasm backend
   • KT-71686 K/Wasm: Add functions to convert between Kotlin and JS array types
   • KT-71473 K/Wasm: Use --closed-world and related options for Binaryen
   • KT-71800 Wasm compiler: Fix member generation for data classes with an array-type property
   • KT-71580 String::toFloat on wasm behaves differently compared to other targets
   • KT-71523 K/Wasm: cleanup after fix for KT-71474
   • KT-71475 K/Wasm: KClass::qualifiedName returns incorrect result for nested or companion objects
   • KT-71474 K/Wasm: KProperty*Impl equals work incorrectly for clabbale reference created in different files or modules
   • KT-71294 Wasm Artifacts/Resource are being loaded relatively instead of absolutely

   Compiler

   New Features

   • KT-71094 Kotlin/Native incremental compilation: fail compilation if cache build failed
   • KT-70679 Kotlin/Native: fill WritableTypeInfo from Swift Export type mapping
   • KT-54227 Cannot use nullable Nothing as reified type parameter
   • KT-71430 Kotlin-to-Java direct actualization implementation
   • KT-68163 Expose supplementary compiler warnings via CLI

   Performance Improvements

   • KT-71159 [K2] OOM on large enum classes with fields

   Fixes

   • KT-71480 JAVA_CLASS_INHERITS_KT_PRIVATE_CLASS isn't reported while java object isn't created
   • KT-71508 JAVA_CLASS_INHERITS_KT_PRIVATE_CLASS isn't reported when java class is inherited from an effectively private class
   • KT-71260 K2: Internal compiler error in IrFakeOverrideSymbolBase.getOwner when there is no actual for expect
   • KT-58820 OPT_IN_USAGE_ERROR's message text does not account for SubclassOptInRequired
   • KT-71034 Failing compiler/testData/codegen/box/inlineClasses/kt70461.kt
   • KT-71016 K/Wasm: Failing compiler/testData/codegen/box/inlineClasses/kt70461.kt
   • KT-60521 Drop language versions 1.4 and 1.5
   • KT-72154 Dokka fails with not array: KClass<out Annotation> on Kotlin 2.1.20-dev with @SubclassOptInRequired
   • KT-70562 @SubclassOptInRequired cannot accept multiple experimental marker
   • KT-71708 False negative UNSUPPORTED for collection literals as trailing return value
   • KT-52469 Deprecate reified type parameter instantiating into intersection types
   • KT-71563 'llegalStateException: Source classes should be created separately before referencing' when actualized through typealias and java direct actualization
   • KT-71756 K2 evaluator: broken resolve of private members during debug of Kotlin project itself
   • KT-71550 JVM IR: NPE on identity equals of boolean true with null
   • KT-71490 K2: missing REDUNDANT_ELSE_IN_WHEN
   • KT-64403 Implement BlackBoxCodegenTestSpecGenerated for K2
   • KT-71551 JVM IR K1: NPE on generating a function imported from an object from another module
   • KT-71210 K2: false negative FUNCTION_CALL_EXPECTED / NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE with companion objects
   • KT-69549 Try to move callable reference transformation earlier in pipeline
   • KT-71228 K2: "IllegalArgumentException: Failed requirement" caused by lambda parameter and class type
   • KT-71738 K2: False negative REDECLARATION inside object expression
   • KT-70407 Error/warning message for @SubclassOptInRequired-annotated class should provide more context
   • KT-71701 K2: false positive CAN_BE_VAL with lateinit and non-in-place lambda
   • KT-68694 K2 IDE / Kotlin Debugger: AE “Unresolved reference: <HIDDEN: samples/gen/classes/enum class/EnumClass.lam is invisible” on evaluating private lambda inside enum entry
   • KT-70970 K2 IDE / Kotlin Debugger: AE “Only assignable IrValues can be set” on calling overloaded inc() operator on interface
   • KT-70824 K2: NoSuchFieldException when evaluating private extension property
   • KT-70390 K2 IDE / Kotlin Debugger: can't invoke lambda from private class during evaluation
   • KT-68701 K2 IDE / Kotlin Debugger: AE “ERROR_CALL 'Unresolved reference: <HIDDEN: /privateLambda is invisible>#' type=IrErrorType(null)” on evaluating private top-level lambda
   • KT-68695 K2 IDE / Kotlin Debugger: AE “Unsupported callable reference” on evaluating ::lateinitStr on private lateinit property
   • KT-70861 K2 IDE / Kotlin Debugger: can't evaluate Clazz::class call for private class
   • KT-34911 Improve error message for WRONG_ANNOTATION_TARGET: list applicable targets
   • KT-8322 Prohibit use of Nothing as catch parameter
   • KT-71601 K2: When with a subject of type dynamic always considered exhaustive
   • KT-33091 Kotlin/Native: Compiler crashes if an external class is declared
   • KT-59651 K1/K2: Assertion error on external enum usage attempt
   • KT-71121 Kotlin/JS incremental compilation fails with KotlinIllegalArgumentExceptionWithAttachments
   • KT-69939 Extract a category of internal FIR checkers from supplementary FIR checkers
   • KT-71122 Regression in Kotlin Compiler 2.0 causing NPE in the runtime
   • KT-71117 K2: "IllegalArgumentException: No type for StarProjection" with star projection and function type
   • KT-71251 Native & JS K2: Missing check for calling isInitialized inside inline fun
   • KT-71215 K2: UB due to the erroneous greening of the red code with multiple delegation with java
   • KT-59386 K2: Missing CONSTANT_EXPECTED_TYPE_MISMATCH
   • KT-69040 PCLA: deal with "deep" calls that can be fully analyzed properly
   • KT-71046 K/N: a separate lowering to convert function reference to IrConstantObject
   • KT-70931 K2 / Scripts: "cannot convert IrExpression to ConstantValue" when using function annotation
   • KT-69223 Drop parallel lowering mode in JVM backend
   • KT-70260 @JsPlainObject: improve compiler error if a method is present
   • KT-67739 Improve error message when JDK used in -Xjdk-release has corrupted class files
   • KT-63964 K2: different naming of classes defined in script in metadata
   • KT-70014 Common inference: introduce rigidTypeMarker
   • KT-71352 Cannot load script definition class org.gradle.kotlin.dsl.KotlinProjectScriptTemplate
   • KT-63502 Getting java.lang.ClassNotFoundException: javaslang.λ during compilation
   • KT-66316 Kotlin/Native: make @Escapes annotation required for all external functions
   • KT-70965 FIR/AA: Initializers for Java annotation arguments mapping capture use-site sessions
   • KT-64453 K2: Implement ComposeLikeIr...TestGenerated for K2
   • KT-30424 Confusing error message "modality is different"
   • KT-70846 Replace ConeKotlinType.nullability with isMarkedNullable on specific types
   • KT-56720 K2: false positive MANY_IMPL_MEMBER_NOT_IMPLEMENTED in case of delegation in diamond inheritance
   • KT-69937 Define & enforce user-friendly terminology for extended checkers
   • KT-64406 K2: Implement CompileKotlinAgainstJavaTestGenerated for K2
   • KT-69938 Validate sets of default compiler warnings and supplementary compiler warnings
   • KT-68971 Investigate suspicious fragmentation of FIR trees for string literals with interpolation
   • KT-71213 Rethrow exceptions in checkers with some useful attachments
   • KT-71189 K2: emit 'DELEGATE_SPECIAL_FUNCTION_MISSING' and 'DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE' on 'by' keyword
   • KT-71178 K2: False negative NO_ELSE_IN_WHEN in when over nullable type with !is Nothing? check
   • KT-70812 False positive NO_ELSE_IN_WHEN with nullable type argument as subject
   • KT-70947 False positive NO_ELSE_IN_WHEN with DNN subject and nullable sealed class upper bound
   • KT-67383 Incorrect optimisation when optimising for loop with UByte
   • KT-70752 Review diagnostics with whole declaration as range
   • KT-71160 K2: Rendering of flexible collection types and arrays is too verbose
   • KT-61227 Definitely non-nullable types cause "Any was expected" for @Nullable parameter
   • KT-69389 K2: NONE_APPLICABLE instead of more useful "type mismatch" error with overloads and parameter nullability mismatch
   • KT-70930 K2: Java annotations not present on ENUM_ENTRY IR elements
   • KT-69794 K2: Wrong target is reported for EXPOSED_SUPER_INTERFACE diagnostic
   • KT-70724 False-positive UNINITIALIZED_VARIABLE for inline constructor with late-initialized variables
   • KT-70749 False-positive UNINITIALIZED_VARIABLE for inline fun with crossinline modifier

   Compose compiler

   New features

   • b/328817808 Added the PausableComposition feature flags

   Fixes

   • b/366040842, b/365066530 Replace deep copy in Compose plugin with in-place type mutation
   • b/329477544 Force open / overridden Composable functions to be non-restartable.
   • b/361652128 Disable live literal transform if the corresponding flag is disabled

   IR. Actualizer

   • KT-71631 Kotlin-to-Java direct actualization: java annotation element isn't actualized
   • KT-71597 Kotlin-to-Java direct actualization: it is possible to actualize a function with default parameters
   • KT-71592 Kotlin-to-Java direct actualization: constructor of nested class can't be actualized
   • KT-71577 Kotlin-to-Java direct actualization: method can be actualized by java static method
   • KT-71817 Actualization of static members is broken for non-JVM platforms

   IR. Inlining

   Fixes

   • KT-69565 Don't generate synthetic accessors for private symbols inside local classes
   • KT-71137 Generate synthetic accessors for backing fields
   • KT-64865 Explicitly generate accessors for private declarations in inline functions
   • KT-70420 Enable double-inlining in Native & JS backends by default
   • KT-71657 K/JS: Double-inlining causes failures in IC with top-level synthetic accessors
   • KT-71659 IR Inliner fails to inline function expressions due to implicit cast from the 1st phase of inlining
   • KT-71078 Inline all functions in local classes at the 1st stage of inlining
   • KT-66508 IR inliner: Add implicit cast for initializer of temporary variables
   • KT-66507 IR inliner: Enable implicit casts in all KLib backends
   • KT-69466 IrInlinedFunctionBlock: Refactor it to make it possible to serialize in KLIBs
   • KT-69317 IR Inlining. Try to place inlined arguments outside IrInlinedFunctionBlock
   • KT-69307 Source offsets seem incorrect after IR inlining
   • KT-67149 Common Native/JS lowering prefix at the 2nd phase of compilation
   • KT-69681 IR: Report warnings on exposure of private types in non-private inline functions
   • KT-71232 Implement an IR validation check that ensures that all IrFields are private on non-JVM backends
   • KT-67304 Keep in common prefix: Shared variables + local classes in inline lambdas
   • KT-70583 Internal error in body lowering: java.lang.IllegalStateException: An attempt to generate an accessor after all accessors have been already added to their containers

   IR. Tree

   • KT-71826 stdlib fails to compile with -Xserialize-ir=all
   • KT-67752 Make copyRemappedTypeArgumentsFrom and transformValueArguments methods in DeepCopyIrTreeWithSymbols protected instead of private
   • KT-69644 Report warning on cross-file IrGetField operations generated by compiler plugins
   • KT-71191 SymbolTable: Check if the provided signature is public before adding a symbol to the SymbolTable

   JavaScript

   Fixes

   • KT-70117 Generate debug info for code from js call
   • KT-69408 [JS] Enable insertAdditionalImplicitCasts=true (as in other KLIB-based backends)
   • KT-67452 K2: Consider hiding dynamic type creation under FlexibleTypeFactory for JS only
   • KT-70226 Delete JS tests that were only run with the legacy JS backend
   • KT-71338 K/JS: Add a flag for switching generating arrow functions on & off
   • KT-70707 KJS: asJsReadonlyMapView does not implement ReadonlyMap correctly
   • KT-71220 Fix invalid IrFunctionReference creation in InnerClassConstructorCallsLowering
   • KT-70229 Remove test classes related to the legacy JS backend
   • KT-70359 Remove legacy backend-related test directives from Kotlin/JS tests
   • KT-70362 Clean up Gradle tasks for running JS tests against the legacy JS backend
   • KT-30016 JS BE does not generate special bridge methods

   Klibs

   • KT-64169 [KLIB Resolve] Don't skip libraries that happen to have the same unique_name
   • KT-67448 [KLIB Resolve] Deprecate passing KLIB unique names via CLI
   • KT-71455 [KLIB Resolve] Forbid passing KLIB unique names via CLI
   • KT-67474 K2: Missing @ExtensionFunctionType in metadata in KLIBs
   • KT-67450 [KLIB Resolve] Kotlin/Native: Only one implicit repository should remain for the compiler ("dist")
   • KT-61098 [KLIB Resolve] Don't allow working with KLIB "repositories"
   • KT-66218 Clean-up the code for serialization & deserialization of DFGs to & from KLIBs

   Language Design

   • KT-71222 Remove @ExperimentalSubclassOptIn from SubclassOptInRequired
   • KT-67675 Allow usage of Array<Nothing?>
   • KT-69924 Mention 'if' guard when '&&' is used incorrectly

   Libraries

   Performance Improvements

   • KT-66715 Performance: faster alternative to String.lines()

   Fixes

   • KT-71628 Review deprecations in stdlib for 2.1
   • KT-71660 Stabilize experimental API for 2.1
   • KT-54299 Extract org.w3c declarations to separate library from K/Wasm Stdlib
   • KT-68027 Document caveats and deincentivise usage of measureTimeMillis
   • KT-71581 Update outdated documentation to common lazy and provide samples
   • KT-71796 Improve documentation for Path.walk and Path.visitFileTree functions
   • KT-69545 Kotlin/Native: Deprecate API marked with FreezingIsDeprecated to error
   • KT-38754 Deprecate appendln in favor of appendLine
   • KT-68019 Fill in missing package descriptions for standard library documentation
   • KT-52181 Native: Inconsistent behaviour of LinkedHashMap#entries on JVM and Native
   • KT-71570 Document suspend lambda builder
   • KT-46785 Get rid of !! after readLine() in the standard library

   Native

   • KT-71435 Native: cannot access class 'objcnames.classes.Protocol'

   Native. Build Infrastructure

   • KT-71820 Update the coroutines version used in kotlin-native build infrastructure

   Native. Platform Libraries

   • KT-70032 Rebuild platform libraries in 2.1.0 with Xcode 16
   • KT-71624 Eliminate remaining UIKit/AppKit removed signatures
   • KT-70031 Rebuild platform libraries in 2.0.21 with Xcode 16

   Native. Runtime

   • KT-70680 Kotlin/Native: Use WritableTypeInfo when creating Swift wrapper from the runtime
   • KT-70568 Native: revert workaround for debug with LLVM 16

   Native. Runtime. Memory

   • KT-70364 Kotlin/Native: data race during GC initialization

   Native. Swift Export

   • KT-71539 Swift Export: export class member overrides
   • KT-70678 Swift Export: generate Kotlin<->Swift type mapping
   • KT-70920 Swift Export Nullability: primitive type
   • KT-71087 Swift Export: Nullability: Never
   • KT-71086 Swift Export: Nullability: Strings
   • KT-70919 Swift Export Nullability: reference type
   • KT-71026 Swift Export: function overloading with ref types does not work
   • KT-70960 Swift Export nullability: add nullability to sir and printer

   Reflection

   • KT-71378 KotlinReflectionInternalError: Inconsistent number of parameters in the descriptor and Java reflection object

   Tools. CLI

   • KT-70179 K2: Building a file with kotlin-test-junit without junit does not include annotations
   • KT-71537 Add JVM target bytecode version 23
   • KT-61745 K2: support light tree in multi-module chunk mode
   • KT-70885 Errors are not reported for wrong arguments in -Xsuppress-warning flag for non-jvm backends
   • KT-70991 K2: Compilation fails if project version has a comma

   Tools. CLI. Native

   • KT-68673 Kotlin/Native "You have not specified any compilation arguments. No output has been produced" when no source nor -Xinclude is passed

   Tools. Compiler Plugins

   • KT-71658 Transform top-level atomic properties to Java boxed atomics
   • KT-65645 Atomicfu-plugin: compilation hangs on a long string concatenation
   • KT-69038 Power-Assert does not display const vals
   • KT-71525 Setting JvmAbiConfigurationKeys.REMOVE_PRIVATE_CLASSES = true triggers java.util.ConcurrentModificationException
   • KT-41888 IrExpression startOffset and endOffset are inconsistent with raw file text
   • KT-69856 Compose Plugin: IrType.erasedUpperBound throws NullPointerException when evaluating IrScript nodes due to missing targetClass
   • KT-69410 PowerAssert: Cannot find overload of requireNotNull without existing message
   • KT-66293 Atomicfu-plugin: wrong return types for lowered extension functions
   • KT-71038 PowerAssert: Constant on RHS of elvis operator leads to compiler crash

   Tools. Daemon

   • KT-69929 compileKotlin task reports that daemon has terminated unexpectedly

   Tools. Fleet. ObjC Export

   • KT-71162 ObjCExport: nullable functional type with reference arguments
   • KT-71022 ObjCExport: enum c keywords translation
   • KT-71082 ObjCExport: KotlinUnit translated as Function1
   • KT-70781 ObjCExport: classifiers and callables type parameters translation
   • KT-70943 ObjCExport: extension order
   • KT-70840 ObjCExport: duplicated interfaces

   Tools. Gradle

   New Features

   • KT-71602 Introduce KotlinTopLevelExtension
   • KT-71603 Introduce KotlinJvmExtension and KotlinAndroidExtension
   • KT-70383 KotlinJvmFactory registerKaptGenerateStubsTask() function should also request compilation task provider
   • KT-69927 Need ability to pass KotlinJvmCompilerOptions to registerKotlinJvmCompileTask()
   • KT-69940 Expose supplementary compiler warnings via KGP
   • KT-71227 [Compose] Add PausableComposition feature flag to the Compose Gradle Plugin

   Performance Improvements

   • KT-65285 Use uncompressed Klibs

   Fixes

   • KT-69851 Compatibility with Gradle 8.10 release
   • KT-58956 Offer a shared interface for JVM and Android compilerOptions in Project extension
   • KT-71405 Compose compiler gradle plugin: project.layout.file can't be used as a value of the 'stabilityConfigurationFiles' option
   • KT-65565 Remove deprecated common platform plugin id
   • KT-70430 Clean-up obsolete Gradle plugin variants for Gradle versions <7.6
   • KT-69853 Compile against Gradle API 8.10
   • KT-69852 Run Gradle integration tests against Gradle 8.10 release
   • KT-71411 Add FUS statistics for new Dokka tasks
   • KT-71291 Log plugins from the list as Gradle plugins
   • KT-66049 KGP JVM: Publishing isn't compatible with isolated projects and project dependencies
   • KT-65990 Update GradleDeprecatedOption.level values for arguments removed from the DSL after 2.1

   Tools. Gradle. JS

   • KT-69628 K/Wasm: Node.js version per project
   • KT-71536 [JS, Wasm] Stop collecting information about KLIB IC in Kotlin2JsCompile

   Tools. Gradle. Multiplatform

   New Features

   • KT-70897 Add KotlinBaseApiPlugin.kotlinAndroidExtension

   Fixes

   • KT-72068 Distribution for klib cross-compilation is not downloaded during compile tasks
   • KT-69412 Change KotlinTargetAlreadyDeclaredChecker's severity from warning to error
   • KT-66461 Promote compiler options DSL for multiplatform projects to stable
   • KT-71529 Deprecate targetFromPreset API with an error
   • KT-71423 Xcode archive missing dSYM files since Kotlin 2.0.20
   • KT-71209 Drop Hierarchy Template diagnostic about used shortcuts
   • KT-71675 checkSandboxAndWriteProtection collides with Compose's syncComposeResources
   • KT-71428 Change deprecation message for KMP target shorcuts
   • KT-71444 Certain POMs produced by Kotlin 2.0.20 cannot be consumed by KMP projects with Android targets
   • KT-69974 KMP: POM dependency rewriter doesn't work with Included Builds OR dependencySubstitution
   • KT-58231 Kotlin Gradle Plugin: set deprecation level to Error for KotlinTarget.useDisambiguationClassifierAsSourceSetNamePrefix and overrideDisambiguationClassifierOnIdeImport
   • KT-71206 KGP: Test source set may get duplicated KLIBs of different versions

   Tools. Gradle. Native

   • KT-71398 kotlinNativeBundleConfiguration should not contain dependencies on unsupported platforms
   • KT-45559 CInteropProcess: Changes to header files are not recognized; Task is still UP-TO-DATE
   • KT-71722 kotlinNativeBundleConfiguration present in JVM-only Gradle project

   Tools. JPS

   • KT-71450 Constant build failure: com.intellij.util.io.ClosedStorageException: storage is already closed

   Tools. Kapt

   • KT-71431 K2KAPT fails on modules without any annotation processors

   Tools. REPL

   • KT-71109 Kotlin Scripting REPL doesn't support keyboard shortcuts

   Tools. Scripts

   • KT-68685 K2 / Script: "KotlinReflectionInternalError: Unresolved class:" caused by main.kts script with nested classes and reflection

   Tools. Wasm

   • KT-71506 [Wasm, IC] FUS report for builds with incremental compilation
   • KT-70367 Update binaryen once we get a release with PR 6793
   • KT-67863 K/Wasm: Remove ChromeWasmGc
   • KT-71360 K/JS & K/Wasm: Upgrade NPM dependencies

   Open source →
6. 2.1.0-Beta116 Sept 2024pre-release
   Release notes

   Changelog

   Analysis. API

   New Features

   • KT-68603 KotlinDirectInheritorsProvider: add an option to ignore non-kotlin results
   • KT-69961 resolveToCallCandidates should support properties
   • KT-69960 resolveToCallCandidates should support operators

   Performance Improvements

   • KT-70757 Performance problem in KaFirVisibilityChecker for KaFirPsiJavaClassSymbol
   • KT-70529 KaSymbol: reduce the number of cached usages

   Fixes

   • KT-65618 K2: resulted FirClass.psi != requested PsiClass from completion
   • KT-70323 FirLazyResolveContractViolationException: lazyResolveToPhase(TYPES) cannot be called from a transformer with a phase TYPES
   • KT-69535 Redesign 'containingSymbol'
   • KT-70859 Do not fail highlighting due to resolution problems
   • KT-67483 K2 IDE: Serializable plugin causes infinite resolve recursion when there is a star import from a class with annotation call
   • KT-63490 Analysis API: Accessing the Analysis API should be prohibited during dumb mode
   • KT-69416 K2 IDE / Completion: “No classifier found” on simple value creating
   • KT-70663 KaFirDestructuringDeclarationSymbol: Failed requirement
   • KT-70662 NPE: FirLazyBodiesCalculatorKt.calculateLazyBodyForProperty
   • KT-70661 Invalid FirDeclarationOrigin ScriptTopLevelDestructuringDeclarationContainer
   • KT-70624 Declaration symbols from code fragments are treated as not local
   • KT-70257 CCE: class kotlin.UInt cannot be cast to class java.lang.Number
   • KT-69070 Analysis API: Querying declared member scope for Java symbols results in exception in some use cases
   • KT-70199 K2: ConcurrentModificationException at FirCallCompleter$LambdaAnalyzerImpl.analyzeAndGetLambdaReturnArguments
   • KT-70376 K2 IDE / Kotlin Debugger: IAE “Only componentN functions should be cached this way, but got: toString” on evaluating toString() method for value class
   • KT-70264 AA: service registration via XML fails with AbstractMethodError in Lint CLI
   • KT-69381 Analysis API: Investigate the viability of current KaSymbol caches
   • KT-69950 Analysis API: Introduce isSubtypeOf(ClassId)
   • KT-68625 K2: “lazyResolveToPhase(STATUS) cannot be called from a transformer with a phase STATUS.”
   • KT-67009 Analysis API: Add abbreviated type tests for type aliases from source modules
   • KT-69977 KaFirFunctionalType#getAbbreviation is always null
   • KT-68341 Analysis API: Expanded function types from libraries don't have an abbreviated type
   • KT-68857 Analysis API: Refactor annotations
   • KT-70386 Do not filter out overloads from different libraries in dangling files
   • KT-65552 K2: CANNOT_CHECK_FOR_ERASED in KtTypeCodeFragment
   • KT-69360 Lack of implicit receiver for the last statement under lambda in scripts
   • KT-69699 Receiver type is not substituted in the case of conflict declarations
   • KT-70206 anonymousSymbol API throws an exception for regular functions
   • KT-65803 K2: Analysis API: KtFirTypeProvider#getSubstitutedSuperTypes throws an exception in the case of "Wrong number of type arguments"
   • KT-68896 Support VirtualFile binary dependency inputs to Analysis API modules
   • KT-69671 TYPES phase contract violation through JavaSymbolProvider
   • KT-69395 K2 IDE: incorrect overload selection from binary dependencies in a shared native source set
   • KT-68573 ISE: "Unexpected constant value (kotlin/annotation/AnnotationTarget, CLASS)" at Kt1DescUtilsKt.toKtConstantValue()
   • KT-69576 Analysis API: FIR implementation of "isImplicitReferenceToCompanion" returns false for companion references in implicit invoke operator calls
   • KT-69568 Analysis API: FIR implementation of "isImplicitReferenceToCompanion" returns true for non-companion references in qualified calls
   • KT-55124 Design common ancestor for KtValueParameter and KtReceiverParameterSymbol
   • KT-69436 Analysis API Platform: Encapsulate LLFirDeclarationModificationService as an engine service
   • KT-63004 K2: Analysis API: Design API for querying declarations generated by compiler plugins (similar to indices)
   • KT-69452 AA FIR: wrong source PSI after compile-time evaluation
   • KT-69679 KaDelegatedConstructorCall should have substituted signature
   • KT-69696 KaSymbolByFirBuilder should filter call-site substitutions
   • KT-69598 AA: definitely not-null type at receiver position should be wrapped in parenthesis
   • KT-60484 Analysis API: add support for KtType pointers similar to KtSymbolPointer
   • KT-68884 Analysis API: Rename/deprecate/remove declarations as part of Stabilization
   • KT-69292 K2: Analysis API: A property's MUST_BE_INITIALIZED diagnostic is not updated after changing field usage in an accessor
   • KT-69453 AA FIR: miss to handle expected type of lambda with explicit label
   • KT-69371 Analysis API: expose only interfaces/abstract classes for the resolution API
   • KT-69533 Protect implementation parts of Analysis API with opt-in annotations
   • KT-68268 LLSealedInheritorsProvider: reduce scope to kotlin files

   Analysis. Light Classes

   • KT-70710 Provide light classes for KMP modules in Android Lint
   • KT-70548 SLC: text of class object access expression is not the same as raw text
   • KT-70572 SLC: missing isInheritor implementation for type parameter
   • KT-70491 SLC: inconsistent source PSI of no-arg constructor for all default values
   • KT-70458 SLC: missed auxiliaryOriginalElement for delegated property
   • KT-70232 Support a companion object inside value classes
   • KT-70349 @delegate:` annotations are missed for light class fields
   • KT-69833 Support value classes
   • KT-69998 Drop redundant cache from ClassInnerStuffCache
   • KT-68328 Move KtLightClassBase to ULC

   Apple Ecosystem

   • KT-66262 Deprecate and remove support for bitcode embedding from the Kotlin Gradle plugin
   • KT-69119 xcodeVersion task fails if Xcode isn't installed and apple-specific native targets aren't declared

   Backend. Wasm

   • KT-70786 Improve DX of the variable view during debugging in Chrome/Firefox for Kotlin/Wasm
   • KT-68185 [WasmJs] Attach js exception object to JsException
   • KT-65799 K/Wasm: remove default exports from wasm exports
   • KT-61130 K/Wasm: Function signatures may clash with base class internal methods from a friend module
   • KT-70394 Investigate increased wasm binary size after switching stdlib compilation to K2
   • KT-69627 Remove create###Array functions from WASM stdlib
   • KT-68509 Fatal: error validating input in compileProductionExecutableKotlinWasmJsOptimize

   Compiler

   New Features

   • KT-69321 Swift export: enable auto-linkage of binary dependencies
   • KT-59798 Builder inference is not working when combined with let expression
   • KT-11526 Improve diagnostics for "X overrides nothing"
   • KT-21908 Support 'when' exhaustiveness checking for generic type parameter with sealed class upper bound
   • KT-49710 False positive NO_ELSE_IN_WHEN with nullable type as receiver
   • KT-69729 Support calling super interface Java methods from Kotlin interface
   • KT-69508 Improve "Public-API inline function cannot access non-public-API" check for the inline property accessors

   Performance Improvements

   • KT-69718 K2: Check for jvm nullability annotations in fir2ir is slow

   Fixes

   • KT-66328 K2: implement an error for KT-66324
   • KT-70584 K2: "IllegalStateException: flow for PostponedLambdaExitNode not initialized - traversing nodes in wrong order?"
   • KT-70808 K2: "node has already been visited" with anonymous object in dead code
   • KT-70850 Pull down typeArguments from ConeKotlinType to ConeClassLikeType
   • KT-64741 Avoid leaking ConeTypeVariable types in diagnostics from PCLA
   • KT-60447 Builder inference fails to infer generic type argument from local class
   • KT-69170 K2: "Unresolved reference" caused by generics and fun interfaces
   • KT-63502 Getting java.lang.ClassNotFoundException: javaslang.λ during compilation
   • KT-70893 K2: Bogus NO_COMPANION_OBJECT on resolve to private qualifier
   • KT-69985 K2: Classifier declarations from root package are resolved without imports in non-root packages
   • KT-70683 K2: Internal compiler error in IrFakeOverrideSymbolBase.getOwner
   • KT-63945 K2: Prevent possible diagnostic loss
   • KT-70901 False positive Public-API inline function cannot access non-public-API property accessor
   • KT-70395 K2: "Captured Type does not have a classifier" caused by out type and interface hierarchy
   • KT-70667 K2: "Type parameter * has inconsistent bounds" caused by wildcard and where-clause
   • KT-70133 K2: false negative UNINITIALIZED_VARIABLE when postponed lambda is created before initialization
   • KT-70306 K2: Lambdas are unserializable: inferred from Java param ? super I
   • KT-70625 K2: ClassCastException caused by function reference, star projection and invariant type parameter
   • KT-70835 K2: "TYPE_MISMATCH" caused by operator assignment
   • KT-70366 K2: "KotlinIllegalArgumentExceptionWithAttachments: Failed to find functional supertype for class "
   • KT-68834 Parentheses don't influence calls of any convention operators (except invoke operator) after safe navigation operator
   • KT-70358 K2: "java.lang.IllegalArgumentException: No type for StarProjection" when using a star projection on a function type
   • KT-69298 K2: "Initializer type mismatch" caused by elvis operator type inference for nullable typealias
   • KT-70461 K2: "Inline class types should have the same representation" caused by value class and smart check
   • KT-69829 Missed UNRESOLVED_LABEL for label in returns and loops
   • KT-61223 JDK 21: new addFirst/addLast and putFirst/putLast methods allow adding nullable value for non-null types
   • KT-66742 Supertypes with inaccessible type arguments are allowed
   • KT-62906 Type system: consider changing simple type & DNN type relation
   • KT-65805 Migrate builtins serializer to K2
   • KT-71004 FirSignatureEnhancement#enhance mutates attributes on the original function
   • KT-70813 Questionable behavior for calls on ILT receivers
   • KT-70208 'when' is not exhaustive for expect Boolean
   • KT-69210 Native: tune LLVM optimization pipeline
   • KT-70753 K2: Missing non-null assertion on the return value of try-catch block
   • KT-69756 TypeOfLowering: don't create constant object nodes before inlining
   • KT-70012 EXTENSION_SHADOWED_BY_MEMBER shouldn't be reported for actual declarations
   • KT-70194 K2 IDE: exception on a very red file
   • KT-70837 K2. "Expected FirResolvedTypeRef with ConeKotlinType but was FirImplicitTypeRefImplWithoutSource" on incorrect call with extension fun
   • KT-66751 Implement a general deprecation of types with inaccessible type arguments
   • KT-68748 K2: Remove irFactory from Fir2IrComponents
   • KT-68893 Invalid annotation in contract crashes with K2
   • KT-61659 K2: Implement the EXTENSION_SHADOWED_BY_MEMBER warning
   • KT-70709 Range for MUST_BE_INITIALIZED shouldn't include property annotations
   • KT-70756 K2. Compiler crash with FileAnalysisException on incorrect symbol in nesting lambda
   • KT-63294 Do not use duplicated compiler argument names across the codebase
   • KT-65349 Changes in smart casting in K2 w.r.t. propagation of information
   • KT-66612 K2: Correctly compute java overrides for member-extension properties
   • KT-70673 False positive NO_ELSE_IN_WHEN with nullable Boolean as subject
   • KT-70672 False positive NO_ELSE_IN_WHEN with nullable Enum as subject
   • KT-69207 Native: use lld when the compiler produces binaries for a Linux target
   • KT-67696 Native: compiler crashes when loading an LLVM bitcode file of unsupported version
   • KT-69767 K2: Investigate differences in tests without alias behavior for cyclic expansion
   • KT-70617 K2: ClassCastException caused by Java enum with overridden name property
   • KT-68796 Non-first invoke operator calls break chained calls of convention operators after safe navigation operator
   • KT-67772 K2: Metadata misses NoInfer annotation for unsafeCast result
   • KT-70304 [FIR2IR] Missing @NoInfer
   • KT-65085 K2: Get rid of special check for unresolved array literals on argument mapping phase
   • KT-65066 K1 crashes, K2 doesn't report type mismatch on array literal inside nested annotation call
   • KT-49235 Kotlin interface limited to 1000 super types
   • KT-69991 K2/JVM: Backend crash with functional types and KFunctions
   • KT-7461 Forbid using projection modifiers inside top-level Array in annotation's value parameter
   • KT-52315 Legacy keywords (header, impl) break enum definitions
   • KT-69499 Native: aggressive inline of runtime procedures causes compiler crash in debug builds
   • KT-69737 Native: incompatible target-cpu attributes between runtime and Kotlin code
   • KT-69911 Unexpected line numbers in default setter
   • KT-61529 K2: Unexpected FirClassLikeSymbol null with -no-jdk
   • KT-69475 K2: No "Name contains illegal characters" for package name with dots inside
   • KT-69484 Native: remove default values for isObjectType
   • KT-70352 K2: False-negative CONFLICTING_UPPER_BOUNDS on Nothing bound
   • KT-59781 K2: investigate implicit cast generation in fir2ir vs psi2ir
   • KT-70036 [FIR2IR] Fix param name in overridden setter
   • KT-68653 Switch latest stable language version in Kotlin project to 2.1
   • KT-68718 [JVM] Generic function is instantiated with wrong type argument
   • KT-70328 K2: @UnsafeVariance stored in the metadata despite the Source retention
   • KT-70313 K2: Don't add Any supertype to kotlin.Nothing compiled from sources
   • KT-61033 K2: implement a diagnostic corresponding to K1's MISSING_BUILT_IN_DECLARATION
   • KT-69982 K2: New errors when executing :kotlin-stdlib:jvmJar
   • KT-70169 K2: implement a deprecation error for Synchronized, Throws, JvmField on annotation parameters
   • KT-67651 K2: inconsistency in behavior for SAM constructor with flexible type
   • KT-63857 K2: Extra operator modifier in metadata
   • KT-70182 K2: Set up isOperator flag according to operator naming conventions during building synthetic overrides for Java methods
   • KT-20798 Implement a deprecation warning for reified modifier on type parameters of type alias
   • KT-68697 K2 IDE / Kotlin Debugger: NSEE “List is empty.” when method reference is used in some place in code
   • KT-68702 K2 IDE: AE “SyntheticAccessorLowering should not attempt to modify other files!” on evaluating of supermethods toString() and hashCode()
   • KT-69509 K2 IDE / Kotlin Debugger: exception in lowering ReplaceKFunctionInvokeWithFunctionInvoke when compiling code fragment
   • KT-66323 K2: Clarify contracts of ConeSubstitutorByMap
   • KT-69652 K2: False positive "Redundant visibility modifier" with explicitApi()
   • KT-65815 K2: False-positive NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY with inline function returning Nothing?
   • KT-60508 K2/stdlib: compilation of common code fails if built-in types are provided as platform sources
   • KT-70037 K2: Generate IR body for Any constructor despite that fact it's empty
   • KT-69599 K2: Investiage and fix lots of UNRESOLVED_REFERENCE during building stdlib native with K2
   • KT-68375 K2: FirPrimaryConstructorSuperTypeChecker fails on generated superclasses
   • KT-58309 Deal with test failures inside FirTypeEnhancementTestGenerated
   • KT-27112 Implement prohibition of exposing types via type parameters' bounds
   • KT-69831 Add long FastJarFS tests to the nightlyFirCompilerTest configuration
   • KT-69537 K2: Unintentional behavior caused by InferMoreImplicationsFromBooleanExpressions
   • KT-59814 K2: Explore why FirDataFlowAnalyzer strips away value parameters of non top-level-functions
   • KT-69920 K2: java.lang.IllegalArgumentException: FirNamedArgumentExpressionImpl.replaceConeTypeOrNull() during Space project compilation
   • KT-69069 K2: expect overloads are deprioritized in common code
   • KT-69739 K2: "KotlinIllegalArgumentExceptionWithAttachments: Unexpected FirPlaceholderProjectionImpl" caused by unresolved references
   • KT-69511 KJS / K2: False positive IMPLICIT_BOXING_IN_IDENTITY_EQUALS when comparing dynamic with primitive
   • KT-63944 Kotlin/Native: Cache flavor selection doesn't respect GC kind
   • KT-69500 Native: introduce an option to inline less "ALWAYS_INLINE" runtime procedures
   • KT-69717 K2: Don't call coneType/coneTypeOrNull extensions on FirResolvedTypeRef
   • KT-60440 K2/Java: investigate constructor own type parameters enhancement
   • KT-69871 K2 allows modifier keywords on package declaration
   • KT-61271 Frontend: "The label does not denote a loop." error message is used even if the label does denote a loop
   • KT-69768 K2: Investigate differences in tests without alias behavior with typealias to enum entry
   • KT-63846 K2: incorrect type argument inferred for smart cast value of a generic type
   • KT-69774 Don't report overload resolution ambiguity if extension receiver contains error type
   • KT-61316 K2: Consider throwing exception when replaceType is called on special FirExpressions with immutable types
   • KT-69399 Native: IllegalStateException: "Failed to build cache"
   • KT-69564 Make using -Xuse-k2 compiler flag an error
   • KT-69201 Discard expect candidate in overload conflict resolver if there is no actual
   • KT-69735 K2: Static fields are missing from the declaration list of corresponding IrClass for java class
   • KT-69783 K2: Make FirTypeProjection sealed
   • KT-68000 Investigate getting container functions in checkers
   • KT-69649 K2: Cleanup various utilities about toSymbol conversion
   • KT-69185 K2: Prepare a test runner for diagnostic tests with type aliases non-expanded automatically
   • KT-69390 UNRESOLVED_REFERENCE on call with lambda argument turns whole call red
   • KT-68794 K2 IDE / Kotlin Debugger: ISE “No real overrides for FUN FAKE_OVERRIDE name:privateFun visibility:private modality:FINAL” on calling private function from superclass in debugger
   • KT-69315 FirJavaGenericVarianceViolationTypeChecker: StackOverflowError
   • KT-49962 "Visibility inherited is not allowed in forVisibility" when analyzing broken file
   • KT-24212 Report "This class shouldn't be used in Kotlin" on calling constructor of Java class with Kotlin analog
   • KT-64195 K2: Consider make FirAnonymousInitializer. containingDeclarationSymbol not null
   • KT-64254 "Projections are not allowed on type arguments of functions and properties": Type-project type arguments of properties
   • KT-40533 Error message PROPERTY_WITH_NO_TYPE_NO_INITIALIZER for interface property is not fully correct
   • KT-20014 Improve diagnostics for lateinit property without initializer and type annotation
   • KT-51366 False positive error "Value class cannot extend classes" when extending generic interface with wrong number of type arguments
   • KT-69407 K2: Compiler crash (Shouldn't be here) due to unresolved reference in FirProjectionRelationChecker
   • KT-69294 K2: Report CONSTRUCTOR_OR_SUPERTYPE_ON_TYPEALIAS_WITH_TYPE_PROJECTION_ERROR instead of EXPANDED_TYPE_CANNOT_BE_INHERITED after switching to LV 2.1
   • KT-68277 K2: false positive UNREACHABLE_CODE for non-local return/break
   • KT-69544 K2: Mapped Java @Target annotation's vararg argument has swapped type and elementType
   • KT-68998 K2: Refactor postponed atoms
   • KT-69288 Native: Apple LLVM 16 fork can't read bitcode with memory attribute produced by upstream LLVM 16
   • KT-67808 K2: Inconsistent properties initialization analysis in init blocks in presence of smartcast on this
   • KT-68933 CompilationException: Back-end: Could not get inlined class
   • KT-69035 K2: Investigate potential removal of FirMangler
   • KT-64640 Prevent mutating SequenceCollection methods from JDK 21 be available on read-only collections
   • KT-65441 K1: Remove JDK 21 getFirst()/getLast() in (Mutable)List interfaces
   • KT-54792 Store program order of properties inside @kotlin.Metadata

   Compose compiler

   New features

   • 83c48a0 Decoy support for JS target is removed from Compose compiler

   Fixes

   • b/325004814 [Compose] Fix infinite recursion in target analysis
   • b/357878245 Disallow open @Composable functions with default params to fix binary compatibility issues.
   • b/338597078 [Compose] Fix target warning message
   • b/351858979 Fix stability inferencing of interfaces on incremental compilation
   • b/346821372 [Compose] Fix code generation for group optimization
   • b/339311821 Give warning when stability configuration file is not found
   • b/346821372 Fixes group generation for if statements when nonSkippingGroupOptimization is enabled.

   IDE. Gradle Integration

   • KT-48554 [Multiplatform Import] Ensure consistency between GradleImportProperties and PropertiesProvider

   IR. Actualizer

   • KT-70894 IR crash. Unprocessed IrFunctionFakeOverrideSymbol when actualize to Java
   • KT-69632 K2: Expect actual mismatch on actualization with alias to expect class

   IR. Inlining

   New Features

   • KT-69527 Set the right visibility for synthetic accessors in SyntheticAccessorLowering

   Fixes

   • KT-69802 Don't extract local classes from inline functions in double inlining mode
   • KT-67292 Handling assertions before the IR inliner
   • KT-69169 Expand assertion intrinsics in backend based on CLI parameters
   • KT-69168 Wrap assertion calls before IR inliner
   • KT-69167 Create intrinsics in stdlib for handling assertions in KLIB-based backends
   • KT-70763 IR inline: consider storing stub_for_inline as an inlined function for callable reference
   • KT-70423 KLIB: SyntheticAccessorLowering - generate static factory functions instead of synthetic constructors
   • KT-70693 IR: replace IrReturnableBlock.inlineFucntion with IrInlinedFunctionBlock.inlineFucntion
   • KT-67172 Native & JS: Introduce OuterThisInInlineFunctionsSpecialAccessorLowering
   • KT-69462 Support dumping IR after inlining in compiler tests
   • KT-69787 Handle clashes of synthetic accessors generated for top-level callables
   • KT-69174 Implement the basic Synthetic Accessors Lowering for KLIB-based backends
   • KT-69700 Inline stub_for_inlining use sites survive after the inliner
   • KT-67170 ArrayConstructorReferenceLowering is missing in Native
   • KT-69172 Implement double-inlining for Native

   IR. Interpreter

   • KT-70388 K2 IDE / Kotlin Debugger: InterpreterError “Unsupported number of arguments for invocation as builtin function: INT_MAX_POWER_OF_TWO” during evaluation

   IR. Tree

   • KT-70333 IR: remove ability to apply compiler plugins during KAPT stub generation phase
   • KT-70330 Automatically keep track of IrValueParameter.index
   • KT-65773 Auto generate IR implementation classes
   • KT-68495 Compile-time failure on bounded generic value used in a contains-check with range
   • KT-68151 Setup testing visibility of referenced declarations in IR
   • KT-68988 [Tests] Streamline the order of irFiles in IR- and Kotlin-like dumps
   • KT-68974 Validate scopes of IrValueParameters in IrValidator

   JavaScript

   New Features

   • KT-70283 KJS / ES6: Don't generate bind(this) calls for anonymous functions that capture this
   • KT-70254 K/JS: Generate arrows in ES6 mode instead of anonymous functions

   Fixes

   • KT-31799 Allow non-identifier characters in Kotlin/JS (backquoted properties, @JsName)
   • KT-69928 KJS: keys() and values() of KtMap's JS view don't behave as expected
   • KT-68975 KJS: Investigate calling js(...) from inline functions
   • KT-70231 Delete the org.jetbrains.kotlin.cli.js.dce.K2JSDce class
   • KT-70393 Investigate failing JS test after switch stdlib compilation to K2
   • KT-55869 Coroutine is not intercepted, when the coroutine is started calling startCoroutineUninterceptedOrReturn using callable reference
   • KT-70221 Rename org.jetbrains.kotlin.cli.js.K2JsIrCompiler to K2JSCompiler
   • KT-70219 Delete the org.jetbrains.kotlin.cli.js.K2JSCompiler class
   • KT-66181 Reorganize JsCodeOutliningLowering and keep it before the IR inliner
   • KT-69587 [Tests] Fix multi-module deserialization in JS irText tests
   • KT-69892 Array.isArray() returns false for an instance returned by KtList.asReadonlyArrayView()
   • KT-64429 K2: Implement KlibJsIrTextTestCaseGenerated for K2
   • KT-69173 Implement double-inlining for JS
   • KT-69642 ES generator-based coroutines rely on eval
   • KT-67327 JS: Remove error tolerance

   KMM Plugin

   • KT-71011 AS KMP plugin: ios application can't start for 2024.2.1

   Klibs

   • KT-68322 Compiler (JS, Wasm): warn about incompatible Kotlin stdlib/compiler pair
   • KT-70146 [KLIB Resolve] Don't fail on nonexistent transitive dependency
   • KT-68195 move KlibMetadataProtoBuf to frondend-independent module
   • KT-68792 Bump KLIB ABI version in 2.1

   Language Design

   • KT-65004 K1: Setter of var, which overrides protected val, is generates as public
   • KT-64972 Forbid overriding by private members in link-time for Kotlin/Native

   Libraries

   • KT-56076 K2: build Kotlin standard library
   • KT-65526 Rewrite builtins as expect-actual
   • KT-68502 K2: Fix or suppress stdlib K2 warnings
   • KT-68731 K2: Handle some formally incompatible expect/actual classes in JVM stdlib
   • KT-70378 Implement custom serialization for Uuid
   • KT-70005 K/Wasm and K/Native: IntArray.sort - array element access out of bounds
   • KT-69817 Set up klib binary API validation for stdlib
   • KT-68396 Handle some formally incompatible top-level expects/actuals callables
   • KT-69524 kotlin.uuid.Uuid: checkHyphenAt - error message always specified index 8
   • KT-69327 [native] FloatingPointParser.initialParse works incorrectly for some inputs

   Native

   • KT-49279 Kotlin/Native: update LLVM from 11.1.0 to 16.0.0
   • KT-61299 Native: patch LLVM to prevent it from using signal handlers incompatibly with JVM
   • KT-69637 Native: our LLVM shouldn't advise submitting bugs to the upstream
   • KT-64636 kotlin.incremental.native=true causes IrLinkageError

   Native. Build Infrastructure

   • KT-69479 Native: remove custom python version building from the LLVM builder container image
   • KT-63214 [K/N] llvm build script fails with MacOSX14.0.sdk sysroot

   Native. C Export

   • KT-69507 LLVM 11 clang with Xcode 16 headers: standard c++ headers

   Native. C and ObjC Import

   • KT-71029 Investigate why stdarg.h declarations leak into testModuleA

   Native. ObjC Export

   • KT-62997 IllegalStateException for hashCode(): KClass for Objective-C classes is not supported yet
   • KT-59497 KClass.simpleName returns null in ObjC-inherited class

   Native. Platform Libraries

   • KT-69448 LLVM 16 clang with Xcode 16 headers: 'sys/cdefs.h' file not found

   Native. Runtime

   • KT-67730 Native: fix runtime compilation warnings after update to LLVM 16

   Native. Runtime. Memory

   • KT-68544 [Native] Implement heap dump tool
   • KT-70365 Kotlin/Native: make thread id be pointer size

   Native. Swift Export

   • KT-70442 Swift Export: export class inheritance
   • KT-70063 Swift export generates invalid Swift code for class and function with the same name
   • KT-70069 Swift export: filter out extension properties
   • KT-70068 Swift export: nullable types are not marked as unsupported
   • KT-68864 Refactor internal details of swift-export-standalone
   • KT-69287 Swift Export: support leaking dependencies
   • KT-69633 Provide interface for multiple module translation
   • KT-69286 [Swift Export][TestInfra] Support translating multiple roots
   • KT-69376 Property with Any type does not force addition of import

   Native. Testing

   • KT-70603 C++ with -fmodules: cyclic dependency in module 'std': std -> _wctype -> __wctype -> std in dev llvm toolchains
   • KT-69181 Native tests infrastructure: link Swift export tests statically
   • KT-71028 Run atomicfu compiler plugin K/N tests against K2
   • KT-65593 [K/N] Reorganize tests build configurations
   • KT-70538 [K/N] StdlibTest — initializationError
   • KT-70594 [K/N] Fix ObjC export tests in FirFrameworkTest
   • KT-70120 [K/N][Tests] Re-enable FirFrameworkTest in ONE_STAGE_MULTI_MODULE

   Tools. CLI

   • KT-69541 K2: "IllegalArgumentException: Unexpected versionNeededToExtract" on using JAR packaged as ZIP64
   • KT-69434 K2: Kotlin compiler JarFS can't handle large dependencies (>2GB)
   • KT-8087 Make it possible to suppress warnings globally in compiler (via command-line option)
   • KT-70959 K2: Support legacy metadata jar format in K2 compiler
   • KT-70337 Obsolete code is not removed after refactoring - JvmEnvironmentConfigurator.registerModuleDependencies
   • KT-70322 Merge CLITool and CLICompiler classes

   Tools. CLI. Native

   • KT-71262 KotlinNativeLink tasks fetching from network despite -Xoverride-konan-properties=dependenciesUrl= being set

   Tools. Compiler Plugins

   • KT-69646 PowerAssert: result of array access operator is unaligned
   • KT-70112 Power Assert: multiline assertion support
   • KT-70504 [atomicfu-plugin] Incremental compilation fails for atomic extensions on JVM
   • KT-70351 K2 CodeGen API exception triggered by a compose compiler plugin lowering transformer for data class example
   • KT-70113 Power Assert: tab support
   • KT-69806 K2: SOE on nested plugin-like annotation in class annotated with itself
   • KT-69538 jvm-abi-gen: Remove copy$default if data class constructor is private and ConsistentCopyVisibility is used

   Tools. Compiler plugins. Serialization

   • KT-70110 Prohibit @Serializable on companion object of another @Serializable class
   • KT-69388 Serialization: "You should use ConeClassLookupTagWithFixedSymbol" caused by @Serializable on local generic class

   Tools. Daemon

   • KT-35381 Get rid of the native-platform usage in kotlin compiler

   Tools. Fleet. ObjC Export

   • KT-70642 ObjCExport: translate collection type arguments as id
   • KT-70546 ObjCExport: method generic parameter is lost and translated as id
   • KT-70329 ObjCExport: translation and forward of super generic types
   • KT-70263 ObjCExport: generic extension support
   • KT-69685 ObjCExport: extension translated as not extension
   • KT-70318 ObjCExport: translate companion type
   • KT-69252 ObjCExport: Get rid of context receivers from ./native/objcexport-header-generator

   Tools. Gradle

   New Features

   • KT-68345 'composeCompiler#stabilityConfigurationFile' doesn't allow setting multiple stability configuration files
   • KT-65125 Provide basic support for Swift Export in Kotlin Gradle Plugin

   Fixes

   • KT-69331 Run tests against Gradle 8.9 release
   • KT-69332 Compile against Gradle 8.9 API
   • KT-67174 Cleanup old Test DSL
   • KT-69719 Bump minimal supported Gradle version to 7.6.3
   • KT-71071 BuildFusStatisticsIT.testInvalidFusReportDir test failes on Windows
   • KT-53280 Gradle plugin leaks some compiler related extensions into API
   • KT-70251 Gradle: hide compiler symbols in KGP
   • KT-69255 Deprecate KotlinCompilationOutput#resourcesDirProvider
   • KT-61706 Gradle: remove kotlin-compiler-embeddable from build runtime dependencies
   • KT-69585 KGP / Composite Build: "Could not apply withXml() to generated POM" during publishing
   • KT-69721 Bump minimal supported Android Gradle plugin version to 7.3.1
   • KT-59769 Many "Unexpected exception happened" warnings during build without internet connection
   • KT-69329 Compatibility with Gradle 8.9 release

   Tools. Gradle. Cocoapods

   • KT-63811 cinterop fails to build klib for iosArm64 target when iOS simulator SDK isn't installed
   • KT-70500 Remove useLibraries from CocoaPods plugin
   • KT-56947 Replace AFNetworking with a smaller library in tests

   Tools. Gradle. JS

   • KT-70621 Move kotlin-test-js-runner out of Kotlin repository
   • KT-67442 KJS / Gradle: kotlinStorePackageLock fails due to OS-dependent lockfile with npm package manager

   Tools. Gradle. Multiplatform

   New Features

   • KT-70469 Add feature flag for Project Isolation and Kotlin Multiplatform

   Fixes

   • KT-70700 Gradle 8.10: The value for task ':commonizeNativeDistribution' property 'kotlinNativeBundleBuildService' cannot be changed any further
   • KT-62911 Export Kotlin Multipaltform Project Coordinates as a secondary variant of apiMetadataElements
   • KT-71396 Gradle client side JVM explodes with OOM due to xcodebuild logs
   • KT-70650 GenerateProjectStructureMetadata is not compatible with Project Isolation
   • KT-69614 Deprecate with error ios/tvos/watchos presets
   • KT-64998 Granular Metadata Dependencies Transformation is not compatible with Project Isolation
   • KT-64996 Commonize Native Distribution task is not compatible with Project Isolation
   • KT-64999 Support Project Isolation with Kotlin Native tasks (XCode integration, Cocoapods etc)
   • KT-70688 Move ExperimentalSwiftExportDsl to another package
   • KT-70612 Report incompatibility warning when Project Isolation enabled and Included builds are used
   • KT-57280 Expose Kotlin Project Structure metadata via consumable configurations instead of accessing all gradle projects directly
   • KT-69899 KMP: Publish BuildType by default for android publications with multiple variants
   • KT-70060 KGP: handleHierarchicalStructureFlagsMigration doesn't support project isolation
   • KT-69323 Don't pass platform dependencies to metadata compilation
   • KT-58298 AndroidAndJavaConsumeMppLibIT maintenance: Convert to new infrastructure and add test for newer AGP versions
   • KT-69472 Remove IncompatibleAgpVersionTooHighWarning diagnostic
   • KT-68976 K2 IDE: Unresolved FileSystem.SYSTEM from OKIO in shared source sets

   Tools. Gradle. Native

   • KT-55832 Support passing errors to Xcode when configuration cache is enabled
   • KT-71419 Light bundle KGP IT run against a stable K/N version
   • KT-70690 not possible to build iOS app with Swift Export and Xcode 16
   • KT-65838 Remove project usage from PlatformLibrariesGenerator
   • KT-70875 KSP1 native tasks fail on configuration phase
   • KT-67162 KGP: Kotlin/Native with Isolated Projects: kotlinNativeBundleBuildService cannot be changed any futher

   Tools. JPS

   • KT-71042 JAVA_MODULE_DOES_NOT_READ_UNNAMED_MODULE when compiling IntelliJ

   Tools. Kapt

   • KT-69860 K2 kapt: use compiler directly instead of Analysis API
   • KT-70600 K2 KAPT: inline reified function has a null signature
   • KT-70718 Kapt: "error: could not load module <Error module>" on error type in data class component
   • KT-69861 Kapt: use IR to obtain line information instead of PSI

   Tools. Scripts

   • KT-68545 Using labeled this access to implicit receivers fails in scripts

   Tools. Wasm

   • KT-70100 wasmJs Target Fails to Compile on ARM64 Linux
   • KT-70297 Wasm: Incorrect kotlinJsTestRunner version set in Multi-Project Builds with mixed kotlin-stdlibs

   Open source →
7. 2.0.2110 Oct 2024
   Release notes

   Changelog

   Apple Ecosystem

   • KT-69093 Xcode 16 support in Kotlin

   Backend. Native. Debug

   • KT-71374 lldb: step out breaks breaking in Xcode 16

   Compiler

   Fixes

   • KT-69735 K2: Static fields are missing from the declaration list of corresponding IrClass for java class
   • KT-71122 Regression in Kotlin Compiler 2.0 causing NPE in the runtime
   • KT-70931 K2 / Scripts: "cannot convert IrExpression to ConstantValue" when using function annotation
   • KT-70584 K2: "IllegalStateException: flow for PostponedLambdaExitNode not initialized - traversing nodes in wrong order?"
   • KT-70808 K2: "node has already been visited" with anonymous object in dead code
   • KT-69985 K2: Classifier declarations from root package are resolved without imports in non-root packages
   • KT-70683 K2: Internal compiler error in IrFakeOverrideSymbolBase.getOwner
   • KT-70901 False positive Public-API inline function cannot access non-public-API property accessor
   • KT-70930 K2: Java annotations not present on ENUM_ENTRY IR elements
   • KT-70194 K2 IDE: exception on a very red file
   • KT-69399 Native: IllegalStateException: "Failed to build cache"

   Compose compiler

   Fixes

   • b/329477544 Force open / overridden Composable functions to be non-restartable.
   • b/361652128 Disable live literal transform if the corresponding flag is disabled

   IR. Actualizer

   • KT-70894 IR crash. Unprocessed IrFunctionFakeOverrideSymbol when actualize to Java

   IR. Tree

   • KT-71191 SymbolTable: Check if the provided signature is public before adding a symbol to the SymbolTable

   Native. Build Infrastructure

   • KT-71485 K/N runtime parts don't build due to _Float16 issues on x86_64 macOS

   Native. C Export

   • KT-69507 LLVM 11 clang with Xcode 16 headers: standard c++ headers

   Native. C and ObjC Import

   • KT-71029 Investigate why stdarg.h declarations leak into testModuleA

   Native. Platform Libraries

   • KT-70566 LLVM 11 clang with Xcode 16 headers: 'sys/cdefs.h' file not found
   • KT-71624 Eliminate remaining UIKit/AppKit removed signatures
   • KT-70031 Rebuild platform libraries in 2.0.21 with Xcode 16

   Native. Testing

   • KT-70603 C++ with -fmodules: cyclic dependency in module 'std': std -> _wctype -> __wctype -> std in dev llvm toolchains

   Tools. CLI. Native

   • KT-71262 KotlinNativeLink tasks fetching from network despite -Xoverride-konan-properties=dependenciesUrl= being set

   Tools. Compiler Plugins

   • KT-71038 PowerAssert: Constant on RHS of elvis operator leads to compiler crash

   Tools. Daemon

   • KT-35381 Get rid of the native-platform usage in kotlin compiler

   Tools. Gradle. Multiplatform

   • KT-71444 Certain POMs produced by Kotlin 2.0.20 cannot be consumed by KMP projects with Android targets
   • KT-70700 Gradle 8.10: The value for task ':commonizeNativeDistribution' property 'kotlinNativeBundleBuildService' cannot be changed any further
   • KT-71396 Gradle client side JVM explodes with OOM due to xcodebuild logs

   Tools. Gradle. Native

   • KT-71419 Light bundle KGP IT run against a stable K/N version

   Tools. JPS

   • KT-71450 Constant build failure: com.intellij.util.io.ClosedStorageException: storage is already closed

   Open source →
8. 2.0.21-RC30 Sept 2024pre-release
   Release notes

   2.0.21-RC

   Apple Ecosystem

   • KT-69093 Xcode 16 support in Kotlin

   Backend. Native. Debug

   • KT-71374 lldb: step out breaks breaking in Xcode 16

   Compiler

   Fixes

   • KT-69735 K2: Static fields are missing from the declaration list of corresponding IrClass for java class
   • KT-71122 Regression in Kotlin Compiler 2.0 causing NPE in the runtime
   • KT-70931 K2 / Scripts: "cannot convert IrExpression to ConstantValue" when using function annotation
   • KT-70584 K2: "IllegalStateException: flow for PostponedLambdaExitNode not initialized - traversing nodes in wrong order?"
   • KT-70808 K2: "node has already been visited" with anonymous object in dead code
   • KT-69985 K2: Classifier declarations from root package are resolved without imports in non-root packages
   • KT-70683 K2: Internal compiler error in IrFakeOverrideSymbolBase.getOwner
   • KT-70901 False positive Public-API inline function cannot access non-public-API property accessor
   • KT-70930 K2: Java annotations not present on ENUM_ENTRY IR elements
   • KT-70194 K2 IDE: exception on a very red file
   • KT-69399 Native: IllegalStateException: "Failed to build cache"

   Compose compiler

   Fixes

   • b/329477544 Force open / overridden Composable functions to be non-restartable.
   • b/361652128 Disable live literal transform if the corresponding flag is disabled

   IR. Actualizer

   • KT-70894 IR crash. Unprocessed IrFunctionFakeOverrideSymbol when actualize to Java

   IR. Tree

   • KT-71191 SymbolTable: Check if the provided signature is public before adding a symbol to the SymbolTable

   Native. Build Infrastructure

   • KT-71485 K/N runtime parts don't build due to _Float16 issues on x86_64 macOS

   Native. C Export

   • KT-69507 LLVM 11 clang with Xcode 16 headers: standard c++ headers

   Native. C and ObjC Import

   • KT-71029 Investigate why stdarg.h declarations leak into testModuleA

   Native. Platform Libraries

   • KT-70566 LLVM 11 clang with Xcode 16 headers: 'sys/cdefs.h' file not found
   • KT-71624 Eliminate remaining UIKit/AppKit removed signatures
   • KT-70031 Rebuild platform libraries in 2.0.21 with Xcode 16

   Native. Testing

   • KT-70603 C++ with -fmodules: cyclic dependency in module 'std': std -> _wctype -> __wctype -> std in dev llvm toolchains

   Tools. CLI. Native

   • KT-71262 KotlinNativeLink tasks fetching from network despite -Xoverride-konan-properties=dependenciesUrl= being set

   Tools. Compiler Plugins

   • KT-71038 PowerAssert: Constant on RHS of elvis operator leads to compiler crash

   Tools. Daemon

   • KT-35381 Get rid of the native-platform usage in kotlin compiler

   Tools. Gradle. Multiplatform

   • KT-71444 Certain POMs produced by Kotlin 2.0.20 cannot be consumed by KMP projects with Android targets
   • KT-70700 Gradle 8.10: The value for task ':commonizeNativeDistribution' property 'kotlinNativeBundleBuildService' cannot be changed any further
   • KT-71396 Gradle client side JVM explodes with OOM due to xcodebuild logs

   Tools. Gradle. Native

   • KT-71419 Light bundle KGP IT run against a stable K/N version

   Tools. JPS

   • KT-71450 Constant build failure: com.intellij.util.io.ClosedStorageException: storage is already closed

   Open source →
9. 2.0.2022 Aug 2024
   Release notes

   Changelog

   Analysis. API

   New Features

   • KT-68143 Analysis API: support KtWhenConditionInRange call resolution

   Performance Improvements

   • KT-67195 K2: do not call redundant resolve on body resolution phase for classes

   Fixes

   • KT-67360 Analysis API: KtDestructuringDeclarationSymbol#entries shouldn't be KtLocalVariableSymbol
   • KT-67748 K2: AllCandidatesResolver modifies the original FirDelegatedConstructorCall
   • KT-68198 Analysis API: Support application service registration in plugin XMLs
   • KT-62936 Analysis API: NativeForwardDeclarationsSymbolProvider is not supported for Kotlin/Native
   • KT-68689 LL API: support analysis from builtins module
   • KT-69630 KAPT User project builds with KAPT4 enabled fail with Metaspace overflow
   • KT-65417 K2 IDE: KTOR false positive expect-actual matching error on enum class because of implicit clone() in non-JVM source sets
   • KT-68882 Analysis API: Refactor KaSymbols
   • KT-65413 K2 IDE: KTOR unresolved serializer() call for @Serializable class in common code
   • KT-67996 Analysis API: rename Kt prefix to Ka
   • KT-67775 Analysis API: expose only interfaces/abstract classes for the user surface
   • KT-68009 K2: lowering transformers of Compose compiler plugin access AbstractFir2IrLazyFunction modality, which results in null point exception
   • KT-68918 collectCallCandidates works incorrectly for parenthesis invoke
   • KT-68462 Analysis API: Integrate project-structure module into analysis-api and analysis-api-platform-interface
   • KT-69131 AA: "provideDelegate" operator is not resolved from the delegation reference in FIR implementation
   • KT-69055 Analysis API: Stabilize KaScopes
   • KT-66216 K2 IDE. "FirDeclaration was not found for class org.jetbrains.kotlin.psi.KtProperty, fir is null" on incorrect string template
   • KT-68959 Introduce KaSeverity
   • KT-53669 Analysis API: redesign KtSymbolOrigin to distinguish kotlin/java source/library declarations
   • KT-68846 Mark KaFirReference and all implementations with internal modifier
   • KT-68845 Move KaSymbolBasedReference to resolution package
   • KT-68844 Move KaTypeProjection to types package
   • KT-65849 K2: Rename 'high-level-api' family of JARs to 'analysis-api'
   • KT-62540 Remove uses of TypeInfo.fromString and TypeInfo.createTypeText from Kotlin plugin
   • KT-62889 K2 IDE. FP MISSING_DEPENDENCY_CLASS on not available type alias with available underlying type
   • KT-68155 Analysis API: Add PSI validity check to analyze
   • KT-62343 Analysis API: fix binary incopatibility problems cause by KtAnalysisSessionProvider.analyze being inline
   • KT-68498 To get reference symbol the one should be KtSymbolBasedReference
   • KT-68393 Analysis API: Rename KaClassLikeSymbol. classIdIfNonLocal to classId
   • KT-62924 Analysis API: rename KtCallableSymbol.callableIdIfNonLocal -> callableId
   • KT-66712 K2 IDE. SOE on settings string template for string variable with the same name
   • KT-65892 K2: "We should be able to find a symbol" for findNonLocalFunction
   • KT-68273 AA: support KtFirKDocReference#isReferenceToImportAlias
   • KT-68272 AA: KtFirReference.isReferenceToImportAlias doesn't work for references on constructor
   • KT-66996 Analysis API: Expose the abbreviated type of an expanded KtType
   • KT-66646 K2: Expected FirResolvedTypeRef with ConeKotlinType but was FirUserTypeRefImpl from FirJsHelpersKt.isExportedObject
   • KT-68203 K2: Analysis API: wrong type of receiver value in case of imported object member
   • KT-68031 LL resolve crash in case of PCLA inference with local object
   • KT-67851 K2: PsiReference#isReferenceTo always returns false for references to Java getters
   • KT-68076 AA: use type code fragments for import alias detection
   • KT-65915 K2: Analysis API: extract services registration into xml file
   • KT-68049 Analysis API: do not expose imported symbols
   • KT-68075 K2: Analysis API: Type arguments for delegation constructor to java constructor with type parameters not supported
   • KT-65190 AA: reference to the super type is not resolved
   • KT-68070 AA: KtExpressionInfoProvider#isUsedAsExpression doesn't work for KtPropertyDelegate
   • KT-67743 K2: Stubs & AbbreviatedTypeAttribute
   • KT-67706 K2: "KtDotQualifiedExpression is not a subtype of class KtNamedDeclaration" from UnusedChecker
   • KT-68021 Analysis API: do not break the diagnostic collection in a case of exception from some collector
   • KT-67973 AA FIR: wrong KtCall modeling for == from type bound
   • KT-67949 AA: Type arguments of Java methods' calls are not reported as used by KtFirImportOptimizer
   • KT-67988 AA: functional type at receiver position should be wrapped in parenthesis
   • KT-66536 Analysis API: ContextCollector doesn't provide implicit receivers from FirExpressionResolutionExtension
   • KT-67321 AA: Type arguments of Java methods' calls are not resolved
   • KT-64158 K2: "KotlinIllegalArgumentExceptionWithAttachments: No fir element was found for KtParameter"
   • KT-60344 K2 IDE. "KotlinExceptionWithAttachments: expect createKtCall to succeed for resolvable case with callable symbol" on attempt to assign value to param named getParam
   • KT-64599 K2: "expect createKtCall to succeed for resolvable case with callable" for unfinished if statement
   • KT-60330 K2 IDE. ".KotlinExceptionWithAttachments: expect createKtCall to succeed for resolvable case with callable symbol" on attempt to assign or compare true with something
   • KT-66672 K2 IDE. False positive INVISIBLE_REFERENCE on accessing private subclass as type argument in parent class declaration
   • KT-67750 Analysis API: Remove infix modifiers from type equality and subtyping functions
   • KT-67655 Analysis API: declare a rule how to deal with parameters in KtLifetimeOwner
   • KT-61775 Analysis API: KtKClassAnnotationValue lacks complete type information
   • KT-67168 K2: Analysis API: Rendering is broken for JSR-305 enhanced Java types
   • KT-66689 Analysis API: KtFirPackageScope shouldn't rely on KotlinDeclarationProvider for binary dependencies in standalone mode
   • KT-60483 Analysis API: add isTailrec property to KtFunctionSymbol
   • KT-67472 K2: Analysis API FIR: KtFunctionCall misses argument with desugared expressions
   • KT-65759 Analysis API: Avoid hard references to LLFirSession in session validity trackers
   • KT-60272 K2: Implement active invalidation of KtAnalysisSessions
   • KT-66765 K2: Analysis API: support classpath substitution with library dependencies in super type transformer
   • KT-67265 K2: status phase should resolve original declarations in the case of classpath subsitution
   • KT-67244 K2: StackOverflowError in the case of cyclic type hierarchy and library classpath substitution
   • KT-67080 K2: clearer contract for lazyResolveToPhaseWithCallableMembers
   • KT-66713 K2 FIR: Expose a way to get the module name used for name mangling
   • KT-61892 KtType#asPsiType could provide nullability annotations
   • KT-66122 Analysis API: Pass KtTestModule instead of TestModule to tests based on AbstractAnalysisApiBasedTest

   Analysis. Light Classes

   • KT-65714 K2: IDE K2: "org.jetbrains.kotlin.analysis.api.fir.symbols.pointers.KtFirClassLikeSymbolPointer pointer already disposed"
   • KT-65835 SymbolLightClassForClassLike.getName returns null for a companion object instead of Companion
   • KT-68261 SLC: Constructors of sealed classes should be private
   • KT-68696 Drop DecompiledPsiDeclarationProvider-related stuff
   • KT-68404 SLC: wrong binary resolution to declaration with @JvmName
   • KT-68275 LC: no arg constructor is not visible in light classes
   • KT-66687 Symbol Light Classes: Duplicate field names for classes with companion objects
   • KT-66804 Symbol Light Classes: Fields from the parent interface's companion are added to DefaultImpls

   Apple Ecosystem

   • KT-65542 Cinterop tasks fails if Xcode 15.3 is used

   Backend. Native. Debug

   • KT-67567 Native: after updating to LLVM 16 lldb hangs when smooth stepping

   Backend. Wasm

   • KT-70591 To much sources that don't exist inside SourceMap file
   • KT-69529 compileProductionExecutableKotlinWasmJs FAILED: No such value argument slot in IrConstructorCallImpl: 1 (total=1)
   • KT-68088 Wasm: "UNREACHABLE executed at Precompute.cpp:838" running gradle task wasmJsBrowserDistribution for compose multiplatform on Windows
   • KT-65798 K/Wasm: make an error on default export usage
   • KT-68828 Wasm test failure. expect-actual. private constructor in expect
   • KT-68453 K/Wasm: "Supported JS engine not detected" in Web Worker
   • KT-64565 Kotlin/wasm removeEventListener function did not remove the event listener
   • KT-65322 [Wasm] Clean-up bootstrap code
   • KT-66099 Wasm: local.get of type f64 has to be in the same reference type hierarchy as (ref 686) @+237036
   • KT-63230 [WASM] println(null) prints 'ul'

   Compiler

   New Features

   • KT-58310 Consider non-functional type constraints for type variable which is an expected type for lambda argument
   • KT-68969 Consider implementing general "redundant interpolation prefix" warning
   • KT-57872 Improve "Public-API inline function cannot access non-public-API" check
   • KT-68165 Native: type checks on generic types boundary
   • KT-67611 Implement improved handling of $ in literals
   • KT-67787 Implement guard conditions for when-with-subject
   • KT-39868 Allow access to protected consts and fields from a super companion object
   • KT-66169 useContents lacks a contract
   • KT-67767 Introduce an ability to enforce explicit return types for public declarations without enabling Explicit API mode
   • KT-65841 Allow to actualize expect types in kotlin stdlib to builtins in JVM
   • KT-53834 Support for JSpecify @NullUnmarked

   Performance Improvements

   • KT-69995 K2: Slow compilation when star projecting mutually recursive bounds from java
   • KT-69723 K2: code analysis taking too long
   • KT-69898 K2: Performance degradation in fir2ir caused by changes around intersection types
   • KT-68034 Devirtualization analysis fails to devirtualize string.get

   Fixes

   • KT-67102 IR Evaluator: NoSuchFieldException when accessing a private delegated property
   • KT-35305 "Overload resolution ambiguity" on function for unsigned types (UByte, UShort, UInt, ULong)
   • KT-69211 K2: java.lang.IllegalArgumentException: Failed requirement
   • KT-68874 Types with different captured types as type arguments are rendered incorrectly
   • KT-66086 K/N: Unchecked illegal cast is not thrown
   • KT-70186 Kotlin 2.0.20-Beta2: Unexpected number of type arguments: 0
   • KT-68889 K2: type variable should not be fixed
   • KT-69835 K2 / Native: kotlin.native.binary.gc=cms throws library cached but its dependency isn't error
   • KT-70417 DELEGATED_MEMBER_HIDES_SUPERTYPE_OVERRIDE leads to NPE in BE
   • KT-69964 K2: Returning from an in-place lambda doesn't compile
   • KT-69773 K2: "Overload resolution ambiguity between candidate" with arrays
   • KT-60261 K2: No origin is set for composite assignment operators
   • KT-15388 Forbid delegated property to have external getter/setter
   • KT-70238 K2: false negative VOLATILE_ON_VALUE for constructor properties
   • KT-68669 K2: Generate inherited delegated members after actualization
   • KT-63828 K2: Missing signature metadata for accessors of properties inherited from delegate
   • KT-63871 K2: different value of isNotDefault flag for property inherited from delegate
   • KT-67119 Migration warning from context receivers to context parameters
   • KT-68997 K2: "No accessor found" for an inline value class when query the value of a delegated class by reflection
   • KT-64106 Native: the compiler allows using -opt and -g at the same time
   • KT-69766 K2: False negative: Internal setter of generic class is accessible from another module
   • KT-68364 JVM: ISE "Bad exception handler end" on a non-local break/continue inside try with finally
   • KT-69494 StackOverflowError in CfgTraverserKt.getPreviousCfgNodes
   • KT-56880 K2. Conflicting overloads for main() isn't shown when language version is set to 2.0
   • KT-69282 K2: equality of unsigned types with nullability works incorrectly
   • KT-68492 JVM IR backend: IDE / Kotlin Debugger: AE “Non-reified type parameter under ::class should be rejected by type checker” on evaluating private generic function
   • KT-70039 K2: inconsistent stability of vals of captured receivers
   • KT-44139 Don't report overload resolution ambiguities if arguments contain an error type
   • KT-68996 K2: "Not enough information to infer type argument" caused by typealias annotation with fixed generic argument
   • KT-55851 K2: reference to a field from package private class crashes in runtime
   • KT-65038 K2: Type alias from indirect dependency causes MISSING_DEPENDENCY_CLASS error
   • KT-61875 Native: remove support for bitcode embedding
   • KT-67693 Implement checkers for K1 compiler which will check the usage of K2 new features and report that they are not supported in K1 compiler
   • KT-68556 K2: false negative PROPERTY_WITH_NO_TYPE_NO_INITIALIZER on uninitialized property without type
   • KT-60445 K2/Java: investigate possible symbol clash while enhancing Java class type parameter bounds
   • KT-64193 K2: No smartcast with two boolean expressions in a row
   • KT-65546 K2. implement extended checker for unused anonymous parameter in lambda
   • KT-68358 @EnhancedNullability is missing on value parameter type after inheritance by delegation with strict JSpecify enabled
   • KT-67791 False negative "Synchronizing by Meters is forbidden" with inline value classes
   • KT-69495 k2: inconsistent output of unsigned number in string templates
   • KT-69619 K2. JAVA_TYPE_MISMATCH when Kotlin out generic type used in Java
   • KT-69563 trying to call .source on FirPackageFragmentDescriptor results in exception
   • KT-69611 Internal annotation FlexibleArrayElementVariance is written to output jar
   • KT-69463 K2: false negative SUPER_CALL_WITH_DEFAULT_PARAMETERS with expect/actual declarations
   • KT-68724 K2: "ABSTRACT_MEMBER_NOT_IMPLEMENTED" caused by open modifier on interface
   • KT-69182 K2: OptIn on enum companion blocks enum constants
   • KT-69191 K2: "Unresolved reference" caused by nested data objects
   • KT-69569 Wrong paths when one type has multiple annotated arguments
   • KT-55128 Wrong type path in type annotations when type arguments are compiled to wildcards
   • KT-67692 Native: support LLVM opaque pointers in the compiler
   • KT-69402 FirSupertypeResolverVisitor: ConcurrentModificationException
   • KT-69062 K1: false-negative "unsupported feature" error on multi-dollar interpolation
   • KT-68967 Consider demoting warnings about multi-dollar interpolation to IJ inspections
   • KT-68957 False-negative diagnostics about multi-dollar interpolation on string literals without interpolation
   • KT-69476 False negative NO_ELSE_IN_WHEN on when over intersection type with expect enum/sealed class
   • KT-67069 K2: Delegated member calls interface method instead of fake override
   • KT-63864 K2: Missing abbreviated type in metadata
   • KT-59833 K2: Stop modifying values of enum entries
   • KT-69421 K2: Resolve changed from delegated function to java default function
   • KT-69392 K2: "UNSAFE_CALL": when with some variable subjects does not smartcast the variable
   • KT-69053 K2: Unsupported intersection overrides for fields
   • KT-69227 K2: "Argument type mismatch" caused by generic typealias and upper bound
   • KT-31371 NOT_YET_SUPPORTED_IN_INLINE: incorrect error message for local inline function
   • KT-49473 PROTECTED_CALL_FROM_PUBLIC_INLINE_ERROR: specialize error message for 'inline' property
   • KT-49474 NON_PUBLIC_CALL_FROM_PUBLIC_INLINE: specialize error message for 'inline' property
   • KT-49503 SUPER_CALL_FROM_PUBLIC_INLINE_ERROR: specialize error message for 'inline' property
   • KT-11302 On inapplicable '@JvmStatic' annotation, highlight only the annotation, not the function signature
   • KT-59510 K2: do not render annotations in the deprecation diagnostic
   • KT-68532 "This code uses error suppression for 'INAPPLICABLE_JVM_NAME'. While it might compile and work, the compiler behavior is UNSPECIFIED and WON'T BE PRESERVED"
   • KT-68859 K2: unable to suppress only "JAVA_MODULE_DOES_NOT_EXPORT_PACKAGE"
   • KT-68469 [K2] MISSING_DEPENDENCY_CLASS caused by redundant @file:JvmName
   • KT-68999 K2: Unify the style of FIR generator with IR and SIR tree-generators
   • KT-66061 Kotlin/Native - building shared module for iOS - Argument list too long
   • KT-49420 Suspicious behaviour of frontend in case of DefinitelyNotNull type overload
   • KT-59752 K2: "Conflicting overloads" if function with same signature added to different contexts
   • KT-68618 K1: Unresolved reference for qualified this in implicit type
   • KT-25341 NOT_YET_SUPPORTED_IN_INLINE reported over anonymous object border
   • KT-69215 K2: IllegalArgumentException for delegated function in anonymous object with captured type parameters
   • KT-69044 Destructuring declaration shouldn't be possible in declaration in when
   • KT-69028 K2: FirJvmActualizingBuiltinSymbolProvider returns null on builtins declarations if common source-set is not presented
   • KT-15704 Rethink usage of term "type annotation" in error messages
   • KT-68970 K2. Argument type mismatch caused by out projection in inferred type from if - else
   • KT-68800 K2: Delete ConeAttributes.plus method
   • KT-59389 K2: Missing AMBIGUOUS_LABEL
   • KT-68803 K2: Smart cast fails with "Unresolved reference" when @Suppress("UNCHECKED_CAST") used in statement
   • KT-68968 K2: Missing ILLEGAL_SUSPEND_FUNCTION_CALL diagnostic in initialization code of a local class inside suspend function
   • KT-68336 K2 does not seem to pass the right constructor arguments to custom scripts
   • KT-68517 "IrSimpleFunctionSymbolImpl is unbound" for actual class containing non-actual functions
   • KT-59678 K2: Investigate ConeKotlinType.unCapture()
   • KT-69027 K2: Initialize FirStdlibBuiltinSyntheticFunctionInterfaceProvider in library session
   • KT-62818 K2: improve VAR_OVERRIDDEN_BY_VAL diagnostic message
   • KT-68214 Rename TypeApproximatorConfiguration properties for clarity
   • KT-68093 Implement deprecation of smartcasts on class-delegated properties
   • KT-67270 Native: report more performance metrics from the compiler
   • KT-68621 DATA_CLASS_INVISIBLE_COPY_USAGE false negative for inline fun
   • KT-68568 K2: False-positive ACCIDENTAL_OVERRIDE caused by missing dependency class
   • KT-66723 K2: NO_ACTUAL_CLASS_MEMBER_FOR_EXPECTED_CLASS for actual typealias that extends to Java class with complicated hierarchy that includes default method
   • KT-69000 Can't render constructor of intersection type
   • KT-68849 K2: "ClassCastException: cannot be cast to kotlin.jvm.functions.Function2" caused by passing lambda to SAM constructor results
   • KT-61744 Native: -Xsave-llvm-ir-after fails to check errors from LLVMPrintModuleToFile
   • KT-67103 Support AbbreviatedTypeAttribute for aliased types from the source code
   • KT-63921 K2: different representation of recursive type aliases
   • KT-68679 K2: "Override has incorrect nullability in its signature compared to the overridden declaration" caused by subclass of Android HashMap
   • KT-64335 K2: improve rendering of captured types in diagnostic messages
   • KT-68820 K2: "Unresolved reference" on calling function with "contract" name
   • KT-67933 K2: no conversion between fun interfaces if target has suspend
   • KT-68230 K2: FirMissingDependencyClassChecker: Not supported: ConeFlexibleType
   • KT-68531 K2: False-negative error on assignment to enum entry
   • KT-68446 K2: compile-time failure on smart-casted generic value used as a when-subject in a contains-check with range
   • KT-68678 K2: Drop using FirBuiltinSymbolProvider while compiling JVM stdlib
   • KT-68382 Get rid of context receivers in FirScript implementation
   • KT-68585 Implement new rules for CFA about enum entries
   • KT-68110 K2: "Java type mismatch" caused by spring.Nullable
   • KT-68613 K2: False positive CONFLICTING_PROJECTION after fixing KT-67764
   • KT-67764 K2: False negative: Projection problem is not reported in is expression
   • KT-67887 Expection on assigning to private field of value type
   • KT-67801 NSME on evaluating private member function with value class parameter
   • KT-67800 NSME on evaluating private top-level function with value class parameter
   • KT-68542 K2: Fix referecing to @ExtensionFunctionType if it's declared in source
   • KT-68188 K2: Properly support FunctionN creation for stdlib compilation
   • KT-67946 K2: Crash on red code: Instead use FirErrorTypeRef for ERROR CLASS: Cannot infer argument for type parameter T
   • KT-68526 K2: false-negative inconsistent data class copy visibility warning on call to generic data class copy function
   • KT-68528 K2: false-positive inconsistent data class copy visibility warning on call to function from another module with identical value parameter types and return type
   • KT-68525 K2: false-negative inconsistent data class copy visibility warning on callable reference to data class copy function
   • KT-68617 K2: Secondary constructors in a sealed class have private visibility instead of protected in the generated IR
   • KT-63920 K2: Private secondary sealed class constructor is private in metadata, but protected in K1
   • KT-57996 Usages of Foo @Nullable []produce only warnings even with-Xtype-enhancement-improvements-strict-mode -Xjspecify-annotations=strict`
   • KT-68207 K2: Investigate if losing ConeIntersectionType.upperBoundForApproximation during approximation leads to any issues
   • KT-64990 K2: Remove usages of SymbolTable from FIR2IR
   • KT-67798 NSME on assigning to private delegated property of value class
   • KT-68264 K2: confusing INVISIBLE_* error when typealias is involved
   • KT-68529 K2: false-negative redundant annotation warning on @ExposedCopyVisibility on data class with public constructor
   • KT-67943 Approximation should not generate types with UPPER_BOUND_VIOLATION errors
   • KT-67503 K2: False negative "Type Expected" when attempting to annotate a wildcard type argument
   • KT-68187 K2: Create IrBuiltins in fir2ir only after IR actualization
   • KT-66443 K2: ArrayIterationHandler doesn't work if UIntArray declared in sources
   • KT-68291 K2 / Contracts: Non-existent invocation kind is suggested as a fix
   • KT-68209 K2: Strange import suggestion when lambda body contains invalid code
   • KT-67368 "NullPointerException: Parameter specified as non-null is null" local lambda creates new not-null checks with 2.0.0-Beta5
   • KT-51433 FE 1.0: implement warnings about label resolve changes
   • KT-66554 K2. Drop FIR based fake-override generator from fir2ir
   • KT-64202 K2: Drop old methods for calculation of overridden symbols for lazy declarations
   • KT-67895 K2: Properly implement generation of fake-overrides for fields
   • KT-54496 K2: REDUNDANT_MODALITY_MODIFIER diagnostic disregards compiler plugins
   • KT-63745 K2: Approximation of DNN with nullability warning attribute leads to attribute incorrectly becoming not-null
   • KT-63362 AbstractTypeApproximator fixes only first local type in hierarchy
   • KT-67769 K2: "variable must be initialized" on unreachable access in constructor
   • KT-51195 FIR IC: Incremental compilation fails with @PublishedApi property
   • KT-67966 No JVM type annotation is generated on a class supertype
   • KT-46640 Generate JVM type annotations on wildcard bounds
   • KT-67952 Annotations on type parameters are not generated for parameters other than the first
   • KT-68012 K2. No 'operator' modifier is required on 'component' error in K2
   • KT-61835 K2: FirStubTypeTransformer receives unresolved expressions in builder inference session
   • KT-63596 K1/K2: Different behavior for lambda with different return type
   • KT-67688 K2: False positive CANNOT_INFER_PARAMETER_TYPE for Unit constraint type variable
   • KT-62080 False positive UNUSED_VARIABLE for variable that is used in lambda and in further code with several conditions
   • KT-60726 K2: Missed TYPE_MISMATCH error: inferred type non-suspend function but suspend function was expected
   • KT-41835 [FIR] Green code turns to red in presence of smartcasts and redundant type arguments
   • KT-67579 K1/JVM: false-negative annotation-based diagnostics on usages of ABI compiled with non-trivially configured generation of default methods
   • KT-67493 K2: argument type mismatch: actual type is 'T', but 'T' was expected
   • KT-64900 K2: getConstructorKeyword call in PsiRawFirBuilder.toFirConstructor forces AST load
   • KT-67648 K2: wrong exposed visibility errors with WRONG_MODIFIER_CONTAINING_DECLARATION on top-level enum class
   • KT-58686 FIR2IR: Don't use global counters
   • KT-67592 K2: Success execution of :kotlin-stdlib:compileKotlinMetadata
   • KT-60398 K2: consider forbidding FirBasedSymbol rebind
   • KT-54918 Refactor transformAnonymousFunctionWithExpectedType
   • KT-63360 K2: Malformed type mismatch error with functional type
   • KT-67266 K2: disappeared INLINE_CLASS_DEPRECATED
   • KT-67569 K2: Fix default value parameters of Enum's constructor if it's declared in source code
   • KT-67378 K2: Don't use wrapScopeWithJvmMapped for common source sets
   • KT-67738 K2: Introduce kotlin.internal.ActualizeByJvmBuiltinProvider annotation
   • KT-64456 K2: Port *VersionRequirementTest to K2
   • KT-67136 Put $this parameter to LVT for suspend lambdas
   • KT-62538 K2: Declarations inside external classes should be implicitly external
   • KT-67627 K2: External interface companion isn't external in IR
   • KT-60290 K2: origin is not set for !in operator
   • KT-67512 K2: false positive WRONG_GETTER_RETURN_TYPE when getter return type is annotated
   • KT-67635 K2: No warning TYPE_MISMATCH_WHEN_FLEXIBILITY_CHANGES for SAM constructor with inferred type
   • KT-60501 K2 Scripting: investigate metadata difference between K1 and K2
   • KT-67598 K2: Fix incorrect casting UByte to Number in FirToConstantValueTransformer
   • KT-56564 False positive "non-exhaustive when" in case of intersection type
   • KT-63969 K2: extra property in metadata
   • KT-63968 K2: extra property in metadata for anonymous variable in script
   • KT-67547 K/N can't build caches, fails with "clang++: error=2, No such file or directory"
   • KT-67469 K2: Failing module in FP-intellij
   • KT-64033 K2: Investigate ForbidInferringPostponedTypeVariableIntoDeclaredUpperBound
   • KT-64457 K2: Fix DecompiledKnmStubConsistencyK2TestGenerated
   • KT-66377 IR Evaluator: "no container found for type parameter" when evaluating nested generics
   • KT-66378 IR Evaluator: Symbol is unbound
   • KT-64506 IDE, IR Evaluator: NPE in ReflectiveAccessLowering.fieldLocationAndReceiver when evaluating private static properties
   • KT-67380 K2: Don't check for equals overriding for class Any
   • KT-67038 K2: Missing type of FirLiteralExpression causes an exception for property initializer type resolution
   • KT-59813 K2: Fix the TODO about firEffect.source in FirReturnsImpliesAnalyzer
   • KT-59834 K2: Fix the TODO about merge(other) in UnusedChecker
   • KT-59188 K2: Change positioning strategy for WRONG_NUMBER_OF_TYPE_ARGUMENTS error
   • KT-59108 K2. SMARTCAST_IMPOSSIBLE instead of UNSAFE_IMPLICIT_INVOKE_CALL
   • KT-65503 The inline processor cannot handle objects inside the lambda correctly when calling an inline function from another module
   • KT-30696 NoSuchMethodError if nested anonymous objects are used with propagation reified type parameter
   • KT-58966 Incorrect type inference for parameters with omitted type of anonymous function that is being analyzed as value of function type with receiver
   • KT-67458 Use @PhaseDescription for JVM backend lowering phases
   • KT-65647 K2 ignores diagnostics on sourceless FirTypeRefs
   • KT-64489 K2: Rename FirAugmentedArraySet
   • KT-67394 FIR: Make FIR repr of For from PSI and LightTree the same
   • KT-66724 K2 IDE. False positive errors because of wrong type inference in complex case of delegated property and type arguments
   • KT-40248 Confusing error message NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY
   • KT-66947 K2: false-positive JSpecify nullability enhancement warning on Java wildcard type argument with same base type but different nullabilities as upper and lower bounds
   • KT-66974 K2: false-negative JSpecify nullability enhancement warning on nullable projection of Java wildcard type argument with non-null bounds in out-position
   • KT-66946 K2: false-negative JSpecify nullability enhancement warning on Java wildcard type argument with nullable upper bound in out-position
   • KT-66442 K2: No visibility error on importing private aliases
   • KT-66598 K2: Allow comparisons, is-checks and casts between Kotlin and platform types
   • KT-55966 K2: Not enough information to infer type variable K if smartcast is used
   • KT-64894 OPT_IN_ARGUMENT_IS_NOT_MARKER diagnostic message is unclear
   • KT-67019 K2: IR has incorrect EQ origins for some inplace updating operators
   • KT-59810 K2: Support other ConstraintPosition-s
   • KT-55383 K1/K2: isClassTypeConstructor behaves differently for stub types
   • KT-60089 K2: Introduced ERROR_IN_CONTRACT_DESCRIPTION
   • KT-60382 K2: Refactor ExpectActualCollector
   • KT-62929 K2: investigate if guessArrayTypeIfNeeded is necessary in annotation loader
   • KT-65642 K2: IR: Array access desugaring doesn't have origins
   • KT-24807 No smartcast to Boolean in subject of when-expression when subject type is non-nullable
   • KT-66057 K2: incorrect supertype leads to class declaration being highlighted red
   • KT-63958 K2: drop support of UseBuilderInferenceOnlyIfNeeded=false
   • KT-63959 K2: treat stub types as non-nullable for isReceiverNullable check
   • KT-65100 IrFakeOverrideBuilder: support custom 'remove(Int)' handling logic in MutableCollection subclasses

   Compose compiler

   New features

   • cdfe659 Changed how compiler features being rolled out are enabled and disabled in compiler plugin CLI. Features, such as strong skipping and non-skipping group optimizations are now enabled through the "featureFlag" option instead of their own option.
   • 192e556 Strong skipping is now enabled by default
   • 842a9e8 Add support for default parameters in abstract and open @Composable functions b/165812010

   Fixes

   • e207b05 Fixes group generation for if statements when nonSkippingGroupOptimization is enabled b/346821372
   • f64fc3a Fixes endToMarker generation in early return from inline lambdas that caused start/end imbalance b/346808602
   • d6ac8a5 Stop memoizing lambdas with captured property delegates b/342557697
   • f38d5a3 Stop capturing parameter meta across crossinline boundary b/343801379
   • 770fe8d Propagate annotations from inferred function types when serializing b/345261077
   • 3c67cda Fix memoization of captureless lambdas when K2 compiler is used b/340582180
   • 3281e53 Allow memoizing lambdas in composable inline functions b/340606661
   • b/351858979 Fix stability inferencing of interfaces on incremental compilation
   • b/346821372 [Compose] Fix code generation for group optimization
   • b/357878245 Disallow open @Composable functions with default params to fix binary compatibility issues.

   IR. Actualizer

   • KT-68830 Compiler crash on missing actual class
   • KT-69024 K2: Children of expect annotation with @OptionalExpectation should be actualized
   • KT-68742 Allow expect protected to Java protected actualization
   • KT-66436 K2. Actualizing modCount property with a field in AbstractMutableList
   • KT-68741 Support actualization of AbstractMutableList.modCount
   • KT-68801 Crash on access of fake override of function actualized by fake override
   • KT-66307 K2: property fake override isn't generated for protected field

   IR. Inlining

   • KT-67208 KJS: put ReplaceSuspendIntrinsicLowering after IR inliner
   • KT-68100 Run IR validation in the beginning and the end of the common prefix
   • KT-69171 Introduce a temporary -X CLI parameter that enables double-inlining
   • KT-69006 Enable IR visibility checks after IR inlining
   • KT-69183 IR inlining: properly handle defaults that depends on previous value parameters
   • KT-67660 Suspicious package part FQN calculation in InventNamesForLocalClasses
   • KT-68558 Move InlineCallableReferenceToLambdaPhase into ir.inline module
   • KT-56466 Support non-local break/continue in IR inliner
   • KT-64958 KJS: Put as many as possible lowerings after the inliner
   • KT-67297 Implement IR deserializer with unbound symbols

   IR. Interpreter

   • KT-66938 Internal error in file lowering: java.lang.AssertionError: Error occurred while optimizing an expression: CALL 'public final fun less (arg0: kotlin.Int, arg1: kotlin.Int): kotlin.Boolean declared in kotlin.internal.ir'

   IR. Tree

   Performance Improvements

   • KT-67695 ForLoopsLowering fails to handle a loop over an imprecise typed iterable

   Fixes

   • KT-68784 Support validating visibility of referenced declarations in IrValidator
   • KT-68174 Delete the IrMessageLogger interface
   • KT-67082 Introduce attributes on IrElement
   • KT-68716 DeepCopyIrTreeWithSymbols.visitConst should remap const type
   • KT-67650 Add default implementations to methods for non-leaf IrSymbol subclasses from SymbolRemapper
   • KT-67649 Autogenerate IrSymbol interface hierarchy
   • KT-44721 IR: merge IrPrivateSymbolBase and IrPublicSymbolBase hierarchies
   • KT-67580 Autogenerate SymbolRemapper
   • KT-67457 Introduce a way to simplify IR lowering phase creation
   • KT-67060 NoSuchMethodError for org.jetbrains.kotlin.ir.expressions.impl.IrCompositeImpl in the Flysto

   JavaScript

   New Features

   • KT-69133 Kotlin/JS: Add support for collection instantiation in JavaScript
   • KT-18891 JS: provide a way to declare static members (JsStatic?)

   Fixes

   • KT-68943 @JsPlainObject breaks when interface has type parameters
   • KT-70592 "Error: HttpClientCall expected" on HTTP request when targeting es2015 with KTOR
   • KT-67273 Creating Kotlin Collections from JS collections
   • KT-65018 JS: Deprecate error tolerance
   • KT-67355 KJS / ES6: 'super' in lambda with enabled -Xir-generate-inline-anonymous-functions leads to JS errors
   • KT-69353 KJS / d.ts: Kotlin does not export base collection classes along with their mutable collection counterparts
   • KT-66898 KJS: Reserved keywords not escaped when -Xir-generate-inline-anonymous-functions is enabled
   • KT-69710 JS IR generates bad code for inner param default referring to outer members
   • KT-68632 K2: allow JS_NAME_CLASH suppression
   • KT-69400 Use correct type for references on local functions when transforming them into lambda
   • KT-68554 Legalize marker interface as parent for JSO (interface marked with @JsPlainObject)
   • KT-68740 Kotlin/JS 2.0.0 IrLinkageError with dynamic function parameters inside data classes
   • KT-68944 @JsPlainObject require properties, when type - nullable alias
   • KT-68891 @JsPlainObject fails to compile when encountering reserved keywords as interface properties
   • KT-69023 KJS / IR: globalThis is mandatory, breaking older browsers support
   • KT-68641 KJS: 'export was not found' with per-file mode on case-insensitive filesystem
   • KT-68053 K2: NON_EXPORTABLE_TYPE on a typealias of primitive type
   • KT-62304 K/JS: Investigate the compiler assertion crash in JS FIR with backend tests
   • KT-68620 [wasm][js] Default param in inner class method fails if we are referring generic extension property
   • KT-64801 K2 + JS and WASM: Inner with default inner doesn't work properly
   • KT-67248 ModuleDescriptor in JS Linker contains incorrect friend dependecies
   • KT-64424 K2: Migrate JsProtoComparisonTestGenerated to K2
   • KT-52602 Kotlin/JS + IR: incompatible ABI version is not reported when no declarations are actually used by a Gradle compilation
   • KT-66092 K/JS & Wasm: .isReified for reified upper bound is wrongly false
   • KT-67112 Unable to apply @JsStatic for common sources: [NO_CONSTRUCTOR]
   • KT-62329 KJS: "UnsupportedOperationException: Empty collection can't be reduced" caused by external enum with "@JsExport"
   • KT-67018 K/JS: Executable js file for module-kind=umd contains top level this instead of globalThis
   • KT-64776 Test infra for JS can't process dependency in mpp module
   • KT-65076 Use the same instance when a fun interface doesn't capture or capture only singletons

   Klibs

   • KT-66557 Check, that no bad metadata in klib is produced, when we failed to compute constant value
   • KT-66968 Provide K/N platforms libs for all available targets
   • KT-66967 Provide K/N stdlib for all available targets in all distributions
   • KT-66605 [KLIB] Excessive creation of BaseKotlinLibrary during resolving libs
   • KT-68824 API 4 ABI: Don't show sealed class constructors
   • KT-68202 KLIB metadata: nested classes are sometimes inside a different 'knm' chunk
   • KT-65834 [KLIB Resolve] Drop library versions in KLIB manifests
   • KT-67446 [KLIB Tool] Drop "-repository <path>" CLI parameter
   • KT-67445 [KLIB Tool] Drop "install" and "remove" commands

   Language Design

   • KT-58920 K2: Prioritize Enum.entries resolve
   • KT-11914 Confusing data class copy with private constructor
   • KT-68636 Incorrect private_to_this visibility for data class with a private constructor

   Libraries

   New Features

   • KT-31880 UUID functionality to fix Java bugs as well as extend it
   • KT-57998 implement Base64.withoutPadding

   Performance Improvements

   • KT-67023 Optimize Int.sign and Long.sign for js and wasmJs targets

   Fixes

   • KT-70196 Introduce ExperimentalUuidApi annotation for marking Uuid API
   • KT-60787 Cannot ignore alpha when formatting with HexFormat
   • KT-68025 Improve documentation for Hex
   • KT-66129 Minor issues with HexFormat
   • KT-67511 provide equals() and hashCode() implementations for kotlinx.metadata.KmType
   • KT-68240 stdlib: proper expects for internal API used in intermediate shared source sets
   • KT-68840 atomicfu-runtime: annotate some internal functions with @PublishedApi
   • KT-68839 Annotate kotlin.js.VOID property with @PublishedApi
   • KT-68023 Improve documentation for Base64
   • KT-51483 Documentation of trimMargin is (partly) difficult to understand
   • KT-64649 Add explanation to "A compileOnly dependency is used in the Kotlin/Native target" warning message
   • KT-67807 JS/Wasm: ByteArray.decodeToString incorrectly handles ill-formed 4-byte sequences with a 2nd byte not being continuation byte
   • KT-67768 Wasm: ByteArray.decodeToString throws out-of-bounds exception if the last byte is a start of a 4-byte sequence
   • KT-66896 Improve Array contentEquals and contentDeepEquals documentation

   Native

   • KT-70166 Native: EXC_BAD_ACCESS on watchOS when using Dispatchers
   • KT-69246 K2: linkPodDebugFrameworkIosArm64 takes 15 (!!) times longer
   • KT-67694 Native: WeakRefBenchmark degradation due to nonoptimized IntProgression iteration
   • KT-69206 Native: updating to LLVM 16 breaks debugging in lldb on Linux
   • KT-68640 Native: updating to LLVM 16 changes behavior of used attribute in C/C++ code
   • KT-58097 Kotlin/Native: improve the error message if Xcode is not properly configured
   • KT-67583 compileKotlin-task unexpectedly downloads K/N dependencies on Linux (but doesn't on Mac)

   Native. Build Infrastructure

   • KT-69781 Kotlin/Native performance tests fail to compile with bitcode

   Native. C and ObjC Import

   • KT-69094 LLVM 11 clang: cinterops fail with "_Float16 is not supported on this target"
   • KT-68254 Native: flaky testForwardEnum test in Kotlin/Native on MacOS
   • KT-65260 Native: compiler crashes when casting to an Obj-C class companion

   Native. ObjC Export

   • KT-65666 Native: enable objcExportSuspendFunctionLaunchThreadRestriction=none by default
   • KT-57496 linkReleaseFrameworkIosArm64: e: Compilation failed: An operation is not implemented

   Native. Platform Libraries

   • KT-69382 LLVM 11 clang: symbol not found when running the linker

   Native. Runtime

   • KT-70043 Native: EXC_BAD_ACCESS on watchOS when using Random
   • KT-68928 EXC_BREAKPOINT: BUG IN CLIENT OF LIBPLATFORM: Trying to recursively lock an os_unfair_lock

   Native. Runtime. Memory

   • KT-66644 Native: threads are too often paused to assist GC (with concurrent mark)
   • KT-68871 Native: Unexpected barriers phase during STW: weak-processing
   • KT-67779 Native: SpecialRefRegistry::ThradData publication prolongs the pause in CMS
   • KT-66918 Native: scan global root set concurrently

   Native. Swift Export

   • KT-69469 Exporting object twice causing crash
   • KT-69251 Get rid of context receivers from ./native/.../lazyWithSessions.kt
   • KT-68865 Move config into test-directives
   • KT-68259 Swift export: secondary constructs lead to compilation errors
   • KT-67095 Native: fix testNativeRefs export test
   • KT-67099 Remove SirVisitor and SirTransformer from code
   • KT-67003 Abandon PackageInflator implementation in favour of PackageProvider component

   Native. Testing

   • KT-69235 Incorrect handling of friend dependencies in Native test infra
   • KT-67436 Native: support CLI tests
   • KT-68416 Native: when using test grouping, a whole group gets ignored on non-Mac hosts if it has Objective-C tests
   • KT-68500 Native: Drop custom logic in ExtTestCaseGroupProvider, mute codegen/box tests explicitly

   Reflection

   • KT-69433 KotlinReflectionInternalError on non-reified type parameter in typeOf inside an inline lambda
   • KT-68675 K2: KotlinReflectionInternalError on non-reified type parameter in typeOf inside a lambda

   Tools. Build Tools API

   • KT-68555 BTA test infra: top level declarations are invisible across modules

   Tools. CLI

   • KT-69792 Add the possibility to disable fast jar fs in K2
   • KT-68838 OutOfMemory when compiling in CLI
   • KT-67939 Add CLI argument to enable when guards feature
   • KT-68743 Extract common CLI arguments for all KLIB-based backends
   • KT-68450 CLI: errors related to module-info are reported even if there are no Kotlin source files
   • KT-68060 FastJarFS fails on empty jars

   Tools. CLI. Native

   • KT-66952 Native: konanc fails when KONAN_HOME is under path with spaces
   • KT-64524 Introduce a CLI argument to override native_targets field in klib manifest

   Tools. Commonizer

   • KT-68835 Command line length overflow on Linux/Windows while invoking commonizer via :commonizeDistribution

   Tools. Compiler Plugin API

   • KT-68020 K2: run FirSupertypeGenerationExtension over generated declarations

   Tools. Compiler Plugins

   • KT-64425 K2: Implement Atomicfu*IrTestGenerated for K2
   • KT-69401 Kotlin power assert plugin doesn't work correctly with safe cast operator
   • KT-69290 PowerAssert: implicit receivers included in power-assert generated diagram
   • KT-68511 Power Assert kotlinx.assertEquals message display problem
   • KT-68807 Power-Assert crashes the Kotlin compiler when if expression used as assertion parameter
   • KT-68162 K2 Parcelize implementation breaks compiler phase contracts
   • KT-67605 K2 parcelize: false positive NOTHING_TO_OVERRIDE in one test
   • KT-64455 K2: Implement ParcelizeIrBoxTestWithSerializableLikeExtension for K2

   Tools. Compiler plugins. Serialization

   • KT-70516 KxSerialization: @KeepGeneratedSerializer and sealed class cause initialization error
   • KT-68752 Serializable annotation on Java class is not taken into account in K2 checker
   • KT-68931 JS/Native + serialization: partial linkage error
   • KT-69039 FIR: Implement IDE-only checker for kotlinx.serialization compiler plugin to report IDE-only diagnostics

   Tools. Fleet. ObjC Export

   • KT-68826 ObjCExport: SerializersModuleBuilder
   • KT-68841 ObjCExport: @Deprecated support
   • KT-68887 ObjCExport: K1 text fixture @Deprecated support
   • KT-68051 [ObjCExport] Support reserved method names

   Tools. Gradle

   New Features

   • KT-68651 Compose: provide a single place in extension to configure all compose flags

   Performance Improvements

   • KT-61861 Gradle: Kotlin compilations depend on packed artifacts

   Fixes

   • KT-69809 Compose Gradle Plugin: AGP doesn't override configuration properties like traceMarkersEnabled
   • KT-65820 Compatibility with Gradle 8.7 release
   • KT-69444 Don't warn about missing Compose Compiler Gradle plugin in some cases
   • KT-67888 Remove usages of deprecated Configuration.fileCollection() method
   • KT-68843 Gradle: Kotlin plugin changes source set 'main' to 'null/main'
   • KT-67395 Add new plugins to collector kotlin gradle performance
   • KT-68661 Move ExperimentalWasmDsl to kotlin-gradle-plugin-annotations
   • KT-69837 Deprecation warning for file-based IC is issued when the property is set to true, altering the intended meaning of the message
   • KT-69291 Compose Gradle plugin: Enable strong skipping by default
   • KT-67766 Build against Gradle API 8.7
   • KT-67889 Run tests against Gradle 8.8 release
   • KT-65271 Gradle: "Mutating dependency DefaultExternalModuleDependency after it has been finalized has been deprecated " with gradle 8.6-rc-3
   • KT-67822 Deprecate JVM history files based incremental compilation
   • KT-64378 Compatibility with Gradle 8.6 release
   • KT-69414 Compose: featureFlags override values of the deprecated compose options
   • KT-67771 Compatibility with Gradle 8.8 release
   • KT-65528 Migrate rest of Gradle integration tests to new Test DSL
   • KT-68306 Project isolation for FUS statistics: Cannot access project ':' from project ':app' at org.jetbrains.kotlin.gradle.report.BuildMetricsService$ Companion.initBuildScanExtensionHolder
   • KT-67890 Compile against Gradle 8.8 API artifact
   • KT-68773 Kotlin 2.0.0 with Gradle 8.8: ConcurrentModificationException on BuildFusService configurationMetrics
   • KT-68308 Project isolation for FUS statistics: An error is thrown at org.gradle.configurationcache.ProblemReportingCrossProjectModelAccess$ProblemReportingProject.getLayout
   • KT-61574 Add project-isolation test for Kotlin/Android plugin
   • KT-65936 Provide a detailed error for changing kotlin native version dependency.
   • KT-62684 PropertiesBuildService should load extraProperties only once
   • KT-67288 Test DSL should not fail the test if build scan publishing has failed
   • KT-58280 org.jetbrains.kotlin.jvm Gradle plugin contributes build directories to the test compile classpath

   Tools. Gradle. JS

   • KT-70077 [2.0.20-Beta2] KGP reports confusing warnings about js/wasmJS source sets
   • KT-69805 YarnSetupTask does not work for custom downloadBaseUrl
   • KT-67444 Gradle / JS: wrong type commonWebpackConfig.devServer.proxy
   • KT-42923 KJS: Resources are not available when running Karma tests
   • KT-68482 KotlinNpmInstallTask is not compatible with configuration cache
   • KT-68072 K/JS, K/Wasm: Module not found in transitive case
   • KT-68103 K/JS, K/Wasm: Generation of test compilation's package.json requires main compilation
   • KT-67924 K/JS, K/Wasm: kotlinNpmInstall can rewrite root package.json

   Tools. Gradle. Kapt

   • KT-64627 Kapt3KotlinGradleSubplugin uses property lookup that breaks project isolation
   • KT-61928 Clarify parameter types in KaptArguments and KaptJavacOption

   Tools. Gradle. Multiplatform

   New Features

   • KT-56566 Consider pre-generating DSL accessors for source sets with names corresponding to the default target hierarchy

   Fixes

   • KT-66568 w: KLIB resolver: The same 'unique_name=...' found in more than one library
   • KT-65754 Gradle: Commonized cinterop dependency configuration changes project description
   • KT-69406 Deprecate combinations of KMP plugin with some Gradle Java plugins
   • KT-64109 Using compileOnly/runtimeOnly dependencies in K/N-related configurations leads to odd behaviour
   • KT-69311 runDebugExecutable task fails with "this.compilation" is null with enabled configuration cache
   • KT-69310 w: KLIB resolver: The same 'unique_name=...' found in more than one library for diamond source set structures
   • KT-61793 KMP/AGP compatibility: Update the maximum tested AGP version to 8.3
   • KT-66209 Accessing the source sets by name is confusing
   • KT-62368 Kotlin 1.9.X fails to detect kotlin.test.Test annotation reference on commonTest source set when targeting JVM+Android
   • KT-67110 Usage of BuildOperationExecutor.getCurrentOpeartion internal Gradle API
   • KT-58319 kotlin.git: ProjectMetadataProviderImpl "Unexpected source set 'commonMain'"

   Tools. Gradle. Native

   • KT-69918 java.lang.NullPointerException: Cannot invoke "org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeCompilation.getTarget()" because "this.compilation" is null
   • KT-67935 OverriddenKotlinNativeHomeChecker does not work well with relative paths
   • KT-64430 Remove deprecated KotlinToolRunner(project) constructor
   • KT-64427 Stop using deprecated KotlinToolRunner(project) constructor call

   Tools. Incremental Compile

   • KT-69042 K2: changing a Java constant won't cause Kotlin usages to recompile
   • KT-63476 Investigate the debug output of JVM compilation in KMP IC smoke tests

   Tools. JPS

   • KT-63707 JPS: "Multiple values are not allowed for" caused by Compose

   Tools. Kapt

   • KT-68145 K2 KAPT: missing $annotations methods for const properties and private properties without accessors
   • KT-67495 File leak in when building with kapt
   • KT-66780 K2 KAPT Kotlinc should exit with an exit code 1 (compilation error) if a Kapt task fails
   • KT-66998 K2 KAPT: Reimplement support for DefaultImpls

   Tools. Scripts

   • KT-69296 scripting dependency resolution does not authenticate towards maven mirrors
   • KT-67575 FromConfigurationsBase script definition unexpected behaviour with regex from gradle templates
   • KT-67066 DeepCopyIrTreeWithSymbols does not copy IrScript nodes correctly
   • KT-67071 K2: ScriptCompilationConfigurationFromDefinition is not serializable
   • KT-67063 LauncherReplTest flaky on Windows

   Tools. Wasm

   • KT-70220 K/Wasm: Upgrade NPM dependencies
   • KT-69245 K/Wasm: Remove warning of working-in-progress
   • KT-69154 K/Wasm: wasmJsBrowserProductionRun flaky crash with "WebAssembly.instantiate(): Import ... function import requires a callable"
   • KT-68930 K/Wasm: Production run doesn not use optimize task result
   • KT-67901 K/Wasm: Add kotlin-wasm-examples to CI
   • [KT-67468](https://youtrack.je

   Note truncated.

   Open source →
10. 2.0.20-RC213 Aug 2024pre-release
    Release notes

    Changelog

    Backend. Wasm

    • KT-70591 To much sources that don't exist inside SourceMap file

    Compiler

    • KT-70186 Kotlin 2.0.20-Beta2: Unexpected number of type arguments: 0
    • KT-69835 K2 / Native: kotlin.native.binary.gc=cms throws library cached but its dependency isn't error
    • KT-70417 DELEGATED_MEMBER_HIDES_SUPERTYPE_OVERRIDE leads to NPE in BE
    • KT-69964 K2: Returning from an in-place lambda doesn't compile
    • KT-69995 K2: Slow compilation when star projecting mutually recursive bounds from java
    • KT-69773 K2: "Overload resolution ambiguity between candidate" with arrays
    • KT-70238 K2: false negative VOLATILE_ON_VALUE for constructor properties
    • KT-69766 K2: False negative: Internal setter of generic class is accessible from another module
    • KT-69898 K2: Performance degradation in fir2ir caused by changes around intersection types

    Compose compiler

    • b/357878245 Disallow open @Composable functions with default params to fix binary compatibility issues.

    JavaScript

    • KT-70592 "Error: HttpClientCall expected" on HTTP request when targeting es2015 with KTOR
    • KT-67355 KJS / ES6: 'super' in lambda with enabled -Xir-generate-inline-anonymous-functions leads to JS errors

    Libraries

    • KT-70196 Introduce ExperimentalUuidApi annotation for marking Uuid API

    Native

    • KT-70166 Native: EXC_BAD_ACCESS on watchOS when using Dispatchers
    • KT-69246 K2: linkPodDebugFrameworkIosArm64 takes 15 (!!) times longer

    Native. Runtime

    • KT-70043 Native: EXC_BAD_ACCESS on watchOS when using Random

    Tools. Compiler plugins. Serialization

    • KT-70516 KxSerialization: @KeepGeneratedSerializer and sealed class cause initialization error

    Tools. Gradle. JS

    • KT-70077 [2.0.20-Beta2] KGP reports confusing warnings about js/wasmJS source sets

    Tools. Wasm

    • KT-70220 K/Wasm: Upgrade NPM dependencies

    Open source →
11. 2.0.20-RC29 Jul 2024pre-release
    Release notes

    2.0.20-RC

    Analysis. API

    • KT-69630 KAPT User project builds with KAPT4 enabled fail with Metaspace overflow

    Backend. Wasm

    • KT-69876 K2 Compile exception: Only IrBlockBody together with kotlinx serialization
    • KT-69529 compileProductionExecutableKotlinWasmJs FAILED: No such value argument slot in IrConstructorCallImpl: 1 (total=1)
    • KT-68088 Wasm: "UNREACHABLE executed at Precompute.cpp:838" running gradle task wasmJsBrowserDistribution for compose multiplatform on Windows

    Compiler

    • KT-69494 StackOverflowError in CfgTraverserKt.getPreviousCfgNodes
    • KT-69723 K2: code analysis taking too long
    • KT-56880 K2. Conflicting overloads for main() isn't shown when language version is set to 2.0
    • KT-69170 K2: "Unresolved reference" caused by generics and fun interfaces
    • KT-70039 K2: inconsistent stability of vals of captured receivers
    • KT-68996 K2: "Not enough information to infer type argument" caused by typealias annotation with fixed generic argument
    • KT-68889 K2: type variable should not be fixed
    • KT-15388 Forbid delegated property to have external getter/setter

    Compose compiler

    • b/351858979 Fix stability inferencing of interfaces on incremental compilation
    • b/346821372 [Compose] Fix code generation for group optimization

    JavaScript

    • KT-69353 KJS / d.ts: Kotlin does not export base collection classes along with their mutable collection counterparts

    Libraries

    • KT-68025 Improve documentation for Hex

    Native. Build Infrastructure

    • KT-69781 Kotlin/Native performance tests fail to compile with bitcode

    Native. C and ObjC Import

    • KT-69094 LLVM 11 clang: cinterops fail with "_Float16 is not supported on this target"

    Native. Platform Libraries

    • KT-69382 LLVM 11 clang: symbol not found when running the linker

    Native. Runtime

    • KT-68928 EXC_BREAKPOINT: BUG IN CLIENT OF LIBPLATFORM: Trying to recursively lock an os_unfair_lock

    Tools. CLI

    • KT-69792 Add the possibility to disable fast jar fs in K2

    Tools. Gradle

    • KT-69809 Compose Gradle Plugin: AGP doesn't override configuration properties like traceMarkersEnabled
    • KT-68843 Gradle: Kotlin plugin changes source set 'main' to 'null/main'
    • KT-69837 Deprecation warning for file-based IC is issued when the property is set to true, altering the intended meaning of the message

    Tools. Gradle. JS

    • KT-69805 YarnSetupTask does not work for custom downloadBaseUrl

    Tools. Gradle. Multiplatform

    • KT-69311 runDebugExecutable task fails with "this.compilation" is null with enabled configuration cache

    Tools. Gradle. Native

    • KT-69918 java.lang.NullPointerException: Cannot invoke "org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeCompilation.getTarget()" because "this.compilation" is null

    Tools. Incremental Compile

    • KT-69042 K2: changing a Java constant won't cause Kotlin usages to recompile

    Tools. JPS

    • KT-69204 Generate lookups in dumb mode for compatibility with ref index

    Open source →
12. 2.0.20-Beta29 Jul 2024pre-release
    Release notes

    Changelog

    Analysis. API

    Fixes

    • KT-65417 K2 IDE: KTOR false positive expect-actual matching error on enum class because of implicit clone() in non-JVM source sets
    • KT-68882 Analysis API: Refactor KaSymbols
    • KT-68689 LL API: support analysis from builtins module
    • KT-67775 Analysis API: expose only interfaces/abstract classes for the user surface
    • KT-68009 K2: lowering transformers of Compose compiler plugin access AbstractFir2IrLazyFunction modality, which results in null point exception
    • KT-68918 collectCallCandidates works incorrectly for parenthesis invoke
    • KT-68462 Analysis API: Integrate project-structure module into analysis-api and analysis-api-platform-interface
    • KT-69131 AA: "provideDelegate" operator is not resolved from the delegation reference in FIR implementation
    • KT-69055 Analysis API: Stabilize KaScopes
    • KT-68959 Introduce KaSeverity
    • KT-68846 Mark KaFirReference and all implementations with internal modifier
    • KT-68845 Move KaSymbolBasedReference to resolution package
    • KT-68844 Move KaTypeProjection to types package
    • KT-65849 K2: Rename 'high-level-api' family of JARs to 'analysis-api'
    • KT-62540 Remove uses of TypeInfo.fromString and TypeInfo.createTypeText from Kotlin plugin
    • KT-68155 Analysis API: Add PSI validity check to analyze
    • KT-62936 Analysis API: NativeForwardDeclarationsSymbolProvider is not supported for Kotlin/Native

    Analysis. Light Classes

    • KT-68261 SLC: Constructors of sealed classes should be private
    • KT-68696 Drop DecompiledPsiDeclarationProvider-related stuff
    • KT-68404 SLC: wrong binary resolution to declaration with @JvmName

    Backend. Native. Debug

    • KT-67567 Native: after updating to LLVM 16 lldb hangs when smooth stepping

    Backend. Wasm

    • KT-68828 Wasm test failure. expect-actual. private constructor in expect

    Compiler

    New Features

    • KT-58310 Consider non-functional type constraints for type variable which is an expected type for lambda argument
    • KT-57872 Improve "Public-API inline function cannot access non-public-API" check

    Fixes

    • KT-65546 K2. implement extended checker for unused anonymous parameter in lambda
    • KT-60445 K2/Java: investigate possible symbol clash while enhancing Java class type parameter bounds
    • KT-68358 @EnhancedNullability is missing on value parameter type after inheritance by delegation with strict JSpecify enabled
    • KT-67791 False negative "Synchronizing by Meters is forbidden" with inline value classes
    • KT-69495 k2: inconsistent output of unsigned number in string templates
    • KT-67693 Implement checkers for K1 compiler which will check the usage of K2 new features and report that they are not supported in K1 compiler
    • KT-44139 Don't report overload resolution ambiguities if arguments contain an error type
    • KT-69282 K2: equality of unsigned types with nullability works incorrectly
    • KT-69619 K2. JAVA_TYPE_MISMATCH when Kotlin out generic type used in Java
    • KT-68996 K2: "Not enough information to infer type argument" caused by typealias annotation with fixed generic argument
    • KT-69563 trying to call .source on FirPackageFragmentDescriptor results in exception
    • KT-69611 Internal annotation FlexibleArrayElementVariance is written to output jar
    • KT-69463 K2: false negative SUPER_CALL_WITH_DEFAULT_PARAMETERS with expect/actual declarations
    • KT-68556 K2: false negative PROPERTY_WITH_NO_TYPE_NO_INITIALIZER on uninitialized property without type
    • KT-68997 K2: "No accessor found" for an inline value class when query the value of a delegated class by reflection
    • KT-68724 K2: "ABSTRACT_MEMBER_NOT_IMPLEMENTED" caused by open modifier on interface
    • KT-68667 K2: Compiler hangs on mapNotNull and elvis inside lambda
    • KT-68747 K2: Long compilation time because of constraint solving when using typealias in different modules
    • KT-68940 K2: "IllegalArgumentException: All variables should be fixed to something"
    • KT-69182 K2: OptIn on enum companion blocks enum constants
    • KT-69191 K2: "Unresolved reference" caused by nested data objects
    • KT-68797 K2 / Native: "java.lang.IllegalStateException: FIELD" caused by enabled caching
    • KT-69569 Wrong paths when one type has multiple annotated arguments
    • KT-63871 K2: different value of isNotDefault flag for property inherited from delegate
    • KT-63828 K2: Missing signature metadata for accessors of properties inherited from delegate
    • KT-68669 K2: Generate inherited delegated members after actualization
    • KT-69402 FirSupertypeResolverVisitor: ConcurrentModificationException
    • KT-68449 K2: "when" expression returns Unit
    • KT-67072 K2: inconsistent stability of open vals on receivers of final type
    • KT-68570 K2: "Unresolved reference" in call with lambda argument and nested lambda argument
    • KT-69476 False negative NO_ELSE_IN_WHEN on when over intersection type with expect enum/sealed class
    • KT-67069 K2: Delegated member calls interface method instead of fake override
    • KT-63864 K2: Missing abbreviated type in metadata
    • KT-69421 K2: Resolve changed from delegated function to java default function
    • KT-69392 K2: "UNSAFE_CALL": when with some variable subjects does not smartcast the variable
    • KT-69159 K2: KotlinNothingValueException in Exposed
    • KT-69053 K2: Unsupported intersection overrides for fields
    • KT-69227 K2: "Argument type mismatch" caused by generic typealias and upper bound
    • KT-31371 NOT_YET_SUPPORTED_IN_INLINE: incorrect error message for local inline function
    • KT-49473 PROTECTED_CALL_FROM_PUBLIC_INLINE_ERROR: specialize error message for 'inline' property
    • KT-49474 NON_PUBLIC_CALL_FROM_PUBLIC_INLINE: specialize error message for 'inline' property
    • KT-49503 SUPER_CALL_FROM_PUBLIC_INLINE_ERROR: specialize error message for 'inline' property
    • KT-11302 On inapplicable '@JvmStatic' annotation, highlight only the annotation, not the function signature
    • KT-59510 K2: do not render annotations in the deprecation diagnostic
    • KT-68532 "This code uses error suppression for 'INAPPLICABLE_JVM_NAME'. While it might compile and work, the compiler behavior is UNSPECIFIED and WON'T BE PRESERVED"
    • KT-68859 K2: unable to suppress only "JAVA_MODULE_DOES_NOT_EXPORT_PACKAGE"
    • KT-68623 K2: "Only safe or null-asserted calls are allowed" on safe call
    • KT-68364 JVM: ISE "Bad exception handler end" on a non-local break/continue inside try with finally
    • KT-68469 [K2] MISSING_DEPENDENCY_CLASS caused by redundant @file:JvmName
    • KT-68999 K2: Unify the style of FIR generator with IR and SIR tree-generators
    • KT-66061 Kotlin/Native - building shared module for iOS - Argument list too long
    • KT-67804 removeFirst and removeLast return type with Java 21
    • KT-49420 Suspicious behaviour of frontend in case of DefinitelyNotNull type overload
    • KT-59752 K2: "Conflicting overloads" if function with same signature added to different contexts
    • KT-68618 K1: Unresolved reference for qualified this in implicit type
    • KT-25341 NOT_YET_SUPPORTED_IN_INLINE reported over anonymous object border
    • KT-69044 Destructuring declaration shouldn't be possible in declaration in when
    • KT-69028 K2: FirJvmActualizingBuiltinSymbolProvider returns null on builtins declarations if common source-set is not presented
    • KT-67119 Migration warning from context receivers to context parameters
    • KT-15704 Rethink usage of term "type annotation" in error messages
    • KT-68970 K2. Argument type mismatch caused by out projection in inferred type from if - else
    • KT-68727 K2: "Null argument in ExpressionCodegen for parameter VALUE_PARAMETER" caused by an enum class with default parameter in a different module
    • KT-68626 K2: "Conflicting Overloads" for function if inherited from generic type
    • KT-68800 K2: Delete ConeAttributes.plus method
    • KT-59389 K2: Missing AMBIGUOUS_LABEL
    • KT-68803 K2: Smart cast fails with "Unresolved reference" when @Suppress("UNCHECKED_CAST") used in statement
    • KT-68968 K2: Missing ILLEGAL_SUSPEND_FUNCTION_CALL diagnostic in initialization code of a local class inside suspend function
    • KT-68489 K2: WRONG_ANNOTATION_TARGET with Java and Kotlin @Target annotation positions
    • KT-68517 "IrSimpleFunctionSymbolImpl is unbound" for actual class containing non-actual functions
    • KT-59678 K2: Investigate ConeKotlinType.unCapture()
    • KT-64193 K2: No smartcast with two boolean expressions in a row
    • KT-69058 K2: Java-defined property annotations not persisted
    • KT-69027 K2: Initialize FirStdlibBuiltinSyntheticFunctionInterfaceProvider in library session
    • KT-62818 K2: improve VAR_OVERRIDDEN_BY_VAL diagnostic message
    • KT-68214 Rename TypeApproximatorConfiguration properties for clarity
    • KT-64515 K2 IDE: [NEW_INFERENCE_ERROR] in a build.gradle.kts script while applying "jvm-test-suite" plugin and then configuring targets for test suites
    • KT-68093 Implement deprecation of smartcasts on class-delegated properties
    • KT-67270 Native: report more performance metrics from the compiler
    • KT-68621 DATA_CLASS_INVISIBLE_COPY_USAGE false negative for inline fun
    • KT-68575 K2: @ParameterName annotation is not erased when inferring the type of it in lambdas
    • KT-69000 Can't render constructor of intersection type
    • KT-68401 K2: "IllegalAccessError: failed to access class" caused by package private super Java type, when inferencing a common super type of if or when branches on JVM
    • KT-68806 K/Wasm RuntimeError: unreachable on Sequence::toList
    • KT-68849 K2: "ClassCastException: cannot be cast to kotlin.jvm.functions.Function2" caused by passing lambda to SAM constructor results
    • KT-68455 K2: False negative UPPER_BOUND_VIOLATED_BASED_ON_JAVA_ANNOTATIONS
    • KT-61744 Native: -Xsave-llvm-ir-after fails to check errors from LLVMPrintModuleToFile
    • KT-68874 Types with different captured types as type arguments are rendered incorrectly
    • KT-67103 Support AbbreviatedTypeAttribute for aliased types from the source code
    • KT-65038 K2: Type alias from indirect dependency causes MISSING_DEPENDENCY_CLASS error
    • KT-63921 K2: different representation of recursive type aliases
    • KT-68538 KJS/K2: using while with break inside inline lambdas leads to an endless cycle
    • KT-68679 K2: "Override has incorrect nullability in its signature compared to the overridden declaration" caused by subclass of Android HashMap
    • KT-68734 K2: enum class in KMP: Expect declaration MMKVLogLevel is incompatible with actual MMKVLogLevel because modality is different
    • KT-68820 K2: "Unresolved reference" on calling function with "contract" name
    • KT-68230 K2: FirMissingDependencyClassChecker: Not supported: ConeFlexibleType
    • KT-68531 K2: False-negative error on assignment to enum entry
    • KT-68571 K2: "IllegalStateException: Fake override should have at least one overridden descriptor" caused by exceptions and when statement
    • KT-68523 K2: FileAnalysisException when using Definitely non-nullable types
    • KT-68339 K2: "Enum entry * is uninitialized here" caused by lazy property with enum in when expression
    • KT-68678 K2: Drop using FirBuiltinSymbolProvider while compiling JVM stdlib
    • KT-68585 Implement new rules for CFA about enum entries
    • KT-68110 K2: "Java type mismatch" caused by spring.Nullable
    • KT-68613 K2: False positive CONFLICTING_PROJECTION after fixing KT-67764
    • KT-67764 K2: False negative: Projection problem is not reported in is expression
    • KT-68542 K2: Fix referecing to @ExtensionFunctionType if it's declared in source
    • KT-68188 K2: Properly support FunctionN creation for stdlib compilation
    • KT-67946 K2: Crash on red code: Instead use FirErrorTypeRef for ERROR CLASS: Cannot infer argument for type parameter T
    • KT-68617 K2: Secondary constructors in a sealed class have private visibility instead of protected in the generated IR
    • KT-63920 K2: Private secondary sealed class constructor is private in metadata, but protected in K1
    • KT-68207 K2: Investigate if losing ConeIntersectionType.upperBoundForApproximation during approximation leads to any issues
    • KT-51433 FE 1.0: implement warnings about label resolve changes

    Compose compiler

    New features

    • 192e556 Strong skipping is now enabled by default
    • 842a9e8 Add support for default parameters in abstract and open @Composable functions b/165812010

    Fixes

    • e207b05 Fixes group generation for if statements when nonSkippingGroupOptimization is enabled b/346821372
    • f64fc3a Fixes endToMarker generation in early return from inline lambdas that caused start/end imbalance b/346808602
    • d6ac8a5 Stop memoizing lambdas with captured property delegates b/342557697
    • f38d5a3 Stop capturing parameter meta across crossinline boundary b/343801379
    • 770fe8d Propagate annotations from inferred function types when serializing b/345261077
    • 3c67cda Fix memoization of captureless lambdas when K2 compiler is used b/340582180
    • 3281e53 Allow memoizing lambdas in composable inline functions b/340606661

    IR. Actualizer

    • KT-68830 Compiler crash on missing actual class
    • KT-69024 K2: Children of expect annotation with @OptionalExpectation should be actualized
    • KT-68742 Allow expect protected to Java protected actualization
    • KT-66436 K2. Actualizing modCount property with a field in AbstractMutableList
    • KT-68741 Support actualization of AbstractMutableList.modCount
    • KT-68801 Crash on access of fake override of function actualized by fake override

    IR. Inlining

    • KT-68100 Run IR validation in the beginning and the end of the common prefix
    • KT-69171 Introduce a temporary -X CLI parameter that enables double-inlining
    • KT-69006 Enable IR visibility checks after IR inlining
    • KT-69183 IR inlining: properly handle defaults that depends on previous value parameters
    • KT-68558 Move InlineCallableReferenceToLambdaPhase into ir.inline module

    IR. Tree

    • KT-68784 Support validating visibility of referenced declarations in IrValidator
    • KT-68174 Delete the IrMessageLogger interface
    • KT-67082 Introduce attributes on IrElement
    • KT-67695 ForLoopsLowering fails to handle a loop over an imprecise typed iterable
    • KT-68716 DeepCopyIrTreeWithSymbols.visitConst should remap const type

    JavaScript

    • KT-66898 KJS: Reserved keywords not escaped when -Xir-generate-inline-anonymous-functions is enabled
    • KT-69400 Use correct type for references on local functions when transforming them into lambda
    • KT-68554 Legalize marker interface as parent for JSO (interface marked with @JsPlainObject)
    • KT-68891 @JsPlainObject fails to compile when encountering reserved keywords as interface properties
    • KT-69023 KJS / IR: globalThis is mandatory, breaking older browsers support
    • KT-68641 KJS: 'export was not found' with per-file mode on case-insensitive filesystem
    • KT-68632 K2: allow JS_NAME_CLASH suppression
    • KT-68620 [wasm] [js] Default param in inner class method fails if we are referring generic extension property

    Klibs

    • KT-66605 [KLIB] Excessive creation of BaseKotlinLibrary during resolving libs
    • KT-68824 API 4 ABI: Don't show sealed class constructors

    Language Design

    • KT-68636 Incorrect private_to_this visibility for data class with a private constructor

    Libraries

    • KT-31880 UUID functionality to fix Java bugs as well as extend it
    • KT-60787 Cannot ignore alpha when formatting with HexFormat
    • KT-66129 Minor issues with HexFormat
    • KT-57998 implement Base64.withoutPadding
    • KT-67511 provide equals() and hashCode() implementations for kotlinx.metadata.KmType
    • KT-68240 stdlib: proper expects for internal API used in intermediate shared source sets
    • KT-68840 atomicfu-runtime: annotate some internal functions with @PublishedApi
    • KT-68839 Annotate kotlin.js.VOID property with @PublishedApi

    Native

    • KT-69206 Native: updating to LLVM 16 breaks debugging in lldb on Linux
    • KT-68640 Native: updating to LLVM 16 changes behavior of used attribute in C/C++ code
    • KT-58097 Kotlin/Native: improve the error message if Xcode is not properly configured

    Native. ObjC Export

    • KT-57496 linkReleaseFrameworkIosArm64: e: Compilation failed: An operation is not implemented

    Native. Runtime. Memory

    • KT-68871 Native: Unexpected barriers phase during STW: weak-processing

    Native. Swift Export

    • KT-69469 Exporting object twice causing crash
    • KT-69251 Get rid of context receivers from ./native/.../lazyWithSessions.kt
    • KT-68865 Move config into test-directives

    Native. Testing

    • KT-69235 Incorrect handling of friend dependencies in Native test infra
    • KT-67436 Native: support CLI tests

    Reflection

    • KT-69433 KotlinReflectionInternalError on non-reified type parameter in typeOf inside an inline lambda
    • KT-68675 K2: KotlinReflectionInternalError on non-reified type parameter in typeOf inside a lambda

    Tools. Build Tools API

    • KT-68555 BTA test infra: top level declarations are invisible across modules

    Tools. CLI

    • KT-68838 OutOfMemory when compiling in CLI
    • KT-68743 Extract common CLI arguments for all KLIB-based backends
    • KT-68450 CLI: errors related to module-info are reported even if there are no Kotlin source files

    Tools. CLI. Native

    • KT-66952 Native: konanc fails when KONAN_HOME is under path with spaces

    Tools. Commonizer

    • KT-68835 Command line length overflow on Linux/Windows while invoking commonizer via :commonizeDistribution

    Tools. Compiler Plugins

    • KT-69401 Kotlin power assert plugin doesn't work correctly with safe cast operator
    • KT-69290 PowerAssert: implicit receivers included in power-assert generated diagram
    • KT-68511 Power Assert kotlinx.assertEquals message display problem
    • KT-68807 Power-Assert crashes the Kotlin compiler when if expression used as assertion parameter
    • KT-68557 K2. Supertypes resolution of KJK hierarchy fails in presence of allopen plugin

    Tools. Compiler plugins. Serialization

    • KT-68931 JS/Native + serialization: partial linkage error
    • KT-69039 FIR: Implement IDE-only checker for kotlinx.serialization compiler plugin to report IDE-only diagnostics
    • KT-68752 Serializable annotation on Java class is not taken into account in K2 checker

    Tools. Daemon

    • KT-68297 KGP 2.0 regression: JAVA_TOOL_OPTIONS is not considered in Kotlin daemon creation

    Tools. Fleet. ObjC Export

    • KT-68887 ObjCExport: K1 text fixture @Deprecated support
    • KT-68841 ObjCExport: @Deprecated support
    • KT-68826 ObjCExport: SerializersModuleBuilder

    Tools. Gradle

    New Features

    • KT-68651 Compose: provide a single place in extension to configure all compose flags

    Performance Improvements

    • KT-61861 Gradle: Kotlin compilations depend on packed artifacts

    Fixes

    • KT-69330 KotlinCompile friendPathsSet property is racy due causing build cache invalidation
    • KT-69444 Don't warn about missing Compose Compiler Gradle plugin in some cases
    • KT-65271 Gradle: "Mutating dependency DefaultExternalModuleDependency after it has been finalized has been deprecated " with gradle 8.6-rc-3
    • KT-69026 Mark AGP 8.5.0 as compatible with KGP
    • KT-67822 Deprecate JVM history files based incremental compilation
    • KT-67771 Compatibility with Gradle 8.8 release
    • KT-65820 Compatibility with Gradle 8.7 release
    • KT-64378 Compatibility with Gradle 8.6 release
    • KT-68661 Move ExperimentalWasmDsl to kotlin-gradle-plugin-annotations
    • KT-69291 Compose Gradle plugin: Enable strong skipping by default
    • KT-65528 Migrate rest of Gradle integration tests to new Test DSL
    • KT-68306 Project isolation for FUS statistics: Cannot access project ':' from project ':app' at org.jetbrains.kotlin.gradle.report.BuildMetricsService$ Companion.initBuildScanExtensionHolder
    • KT-67395 Add new plugins to collector kotlin gradle performance
    • KT-67766 Build against Gradle API 8.7
    • KT-67890 Compile against Gradle 8.8 API artifact
    • KT-68773 Kotlin 2.0.0 with Gradle 8.8: ConcurrentModificationException on BuildFusService configurationMetrics
    • KT-67889 Run tests against Gradle 8.8 release
    • KT-69078 Gradle: Add option to disable FUS Service
    • KT-68308 Project isolation for FUS statistics: An error is thrown at org.gradle.configurationcache.ProblemReportingCrossProjectModelAccess$ProblemReportingProject.getLayout
    • KT-58280 org.jetbrains.kotlin.jvm Gradle plugin contributes build directories to the test compile classpath

    Tools. Gradle. Kapt

    • KT-61928 Clarify parameter types in KaptArguments and KaptJavacOption

    Tools. Gradle. Multiplatform

    • KT-69310 w: KLIB resolver: The same 'unique_name=...' found in more than one library for diamond source set structures
    • KT-66568 w: KLIB resolver: The same 'unique_name=...' found in more than one library
    • KT-69406 Deprecate combinations of KMP plugin with some Gradle Java plugins
    • KT-66209 Accessing the source sets by name is confusing
    • KT-56566 Consider pre-generating DSL accessors for source sets with names corresponding to the default target hierarchy
    • KT-69129 KGP: stdlib version alignment for JS and Wasm
    • KT-62368 Kotlin 1.9.X fails to detect kotlin.test.Test annotation reference on commonTest source set when targeting JVM+Android
    • KT-67110 Usage of BuildOperationExecutor.getCurrentOpeartion internal Gradle API
    • KT-68248 kotlin multiplatform project fail to build on Fedora with corretto

    Tools. Gradle. Native

    • KT-68638 KGP 2.0 breaks native test with api dependencies and configuration cache

    Tools. Kapt

    • KT-68171 K2KAPT: boxed return types in overridden methods changed to primitives
    • KT-68145 K2 KAPT: missing $annotations methods for const properties and private properties without accessors

    Tools. Scripts

    • KT-69296 scripting dependency resolution does not authenticate towards maven mirrors
    • KT-68681 K2 / CLI / Script: "NullPointerException: getService(...) must not be null" caused by @DependsOn

    Tools. Wasm

    • KT-69245 K/Wasm: Remove warning of working-in-progress
    • KT-69154 K/Wasm: wasmJsBrowserProductionRun flaky crash with "WebAssembly.instantiate(): Import ... function import requires a callable"
    • KT-67980 Wasm: Incorrect "Please choose a JavaScript environment to build distributions and run tests" when WASM is not configured

    Open source →
13. 2.0.20-Beta118 Jun 2024pre-release
    Release notes

    Changelog

    Analysis. API

    New Features

    • KT-68143 Analysis API: support KtWhenConditionInRange call resolution

    Performance Improvements

    • KT-67195 K2: do not call redundant resolve on body resolution phase for classes

    Fixes

    • KT-66216 K2 IDE. "FirDeclaration was not found for class org.jetbrains.kotlin.psi.KtProperty, fir is null" on incorrect string template
    • KT-53669 Analysis API: redesign KtSymbolOrigin to distinguish kotlin/java source/library declarations
    • KT-62889 K2 IDE. FP MISSING_DEPENDENCY_CLASS on not available type alias with available underlying type
    • KT-62343 Analysis API: fix binary incopatibility problems cause by KtAnalysisSessionProvider.analyze being inline
    • KT-68498 To get reference symbol the one should be KtSymbolBasedReference
    • KT-68393 Analysis API: Rename KaClassLikeSymbol. classIdIfNonLocal to classId
    • KT-62924 Analysis API: rename KtCallableSymbol.callableIdIfNonLocal -> callableId
    • KT-66712 K2 IDE. SOE on settings string template for string variable with the same name
    • KT-65892 K2: "We should be able to find a symbol" for findNonLocalFunction
    • KT-67360 Analysis API: KtDestructuringDeclarationSymbol#entries shouldn't be KtLocalVariableSymbol
    • KT-68198 Analysis API: Support application service registration in plugin XMLs
    • KT-68273 AA: support KtFirKDocReference#isReferenceToImportAlias
    • KT-68272 AA: KtFirReference.isReferenceToImportAlias doesn't work for references on constructor
    • KT-67996 Analysis API: rename Kt prefix to Ka
    • KT-66996 Analysis API: Expose the abbreviated type of an expanded KtType
    • KT-66646 K2: Expected FirResolvedTypeRef with ConeKotlinType but was FirUserTypeRefImpl from FirJsHelpersKt.isExportedObject
    • KT-68203 K2: Analysis API: wrong type of receiver value in case of imported object member
    • KT-68031 LL resolve crash in case of PCLA inference with local object
    • KT-67851 K2: PsiReference#isReferenceTo always returns false for references to Java getters
    • KT-68076 AA: use type code fragments for import alias detection
    • KT-65915 K2: Analysis API: extract services registration into xml file
    • KT-68049 Analysis API: do not expose imported symbols
    • KT-68075 K2: Analysis API: Type arguments for delegation constructor to java constructor with type parameters not supported
    • KT-65190 AA: reference to the super type is not resolved
    • KT-68070 AA: KtExpressionInfoProvider#isUsedAsExpression doesn't work for KtPropertyDelegate
    • KT-67748 K2: AllCandidatesResolver modifies the original FirDelegatedConstructorCall
    • KT-67743 K2: Stubs & AbbreviatedTypeAttribute
    • KT-67706 K2: "KtDotQualifiedExpression is not a subtype of class KtNamedDeclaration" from UnusedChecker
    • KT-68021 Analysis API: do not break the diagnostic collection in a case of exception from some collector
    • KT-67949 AA: Type arguments of Java methods' calls are not reported as used by KtFirImportOptimizer
    • KT-67988 AA: functional type at receiver position should be wrapped in parenthesis
    • KT-66536 Analysis API: ContextCollector doesn't provide implicit receivers from FirExpressionResolutionExtension
    • KT-67321 AA: Type arguments of Java methods' calls are not resolved
    • KT-64158 K2: "KotlinIllegalArgumentExceptionWithAttachments: No fir element was found for KtParameter"
    • KT-60344 K2 IDE. "KotlinExceptionWithAttachments: expect createKtCall to succeed for resolvable case with callable symbol" on attempt to assign value to param named getParam
    • KT-64599 K2: "expect createKtCall to succeed for resolvable case with callable" for unfinished if statement
    • KT-60330 K2 IDE. ".KotlinExceptionWithAttachments: expect createKtCall to succeed for resolvable case with callable symbol" on attempt to assign or compare true with something
    • KT-66672 K2 IDE. False positive INVISIBLE_REFERENCE on accessing private subclass as type argument in parent class declaration
    • KT-67750 Analysis API: Remove infix modifiers from type equality and subtyping functions
    • KT-67655 Analysis API: declare a rule how to deal with parameters in KtLifetimeOwner
    • KT-61775 Analysis API: KtKClassAnnotationValue lacks complete type information
    • KT-67168 K2: Analysis API: Rendering is broken for JSR-305 enhanced Java types
    • KT-66689 Analysis API: KtFirPackageScope shouldn't rely on KotlinDeclarationProvider for binary dependencies in standalone mode
    • KT-60483 Analysis API: add isTailrec property to KtFunctionSymbol
    • KT-67472 K2: Analysis API FIR: KtFunctionCall misses argument with desugared expressions
    • KT-65759 Analysis API: Avoid hard references to LLFirSession in session validity trackers
    • KT-60272 K2: Implement active invalidation of KtAnalysisSessions
    • KT-66765 K2: Analysis API: support classpath substitution with library dependencies in super type transformer
    • KT-67265 K2: status phase should resolve original declarations in the case of classpath subsitution
    • KT-67244 K2: StackOverflowError in the case of cyclic type hierarchy and library classpath substitution
    • KT-67080 K2: clearer contract for lazyResolveToPhaseWithCallableMembers
    • KT-65413 K2 IDE: KTOR unresolved serializer() call for @Serializable class in common code
    • KT-66713 K2 FIR: Expose a way to get the module name used for name mangling
    • KT-61892 KtType#asPsiType could provide nullability annotations
    • KT-66122 Analysis API: Pass KtTestModule instead of TestModule to tests based on AbstractAnalysisApiBasedTest

    Analysis. Light Classes

    • KT-68275 LC: no arg constructor is not visible in light classes
    • KT-66687 Symbol Light Classes: Duplicate field names for classes with companion objects
    • KT-66804 Symbol Light Classes: Fields from the parent interface's companion are added to DefaultImpls

    Apple Ecosystem

    • KT-68257 Xcode incorrectly reuses embedAndSign framework when moving to and from 2.0.0
    • KT-65542 Cinterop tasks fails if Xcode 15.3 is used

    Backend. Wasm

    • KT-65798 K/Wasm: make an error on default export usage
    • KT-68453 K/Wasm: "Supported JS engine not detected" in Web Worker
    • KT-64565 Kotlin/wasm removeEventListener function did not remove the event listener
    • KT-66099 Wasm: local.get of type f64 has to be in the same reference type hierarchy as (ref 686) @+237036

    Compiler

    New Features

    • KT-67611 Implement improved handling of $ in literals
    • KT-39868 Allow access to protected consts and fields from a super companion object
    • KT-67787 Implement guard conditions for when-with-subject
    • KT-68165 Native: type checks on generic types boundary
    • KT-66169 useContents lacks a contract
    • KT-67767 Introduce an ability to enforce explicit return types for public declarations without enabling Explicit API mode
    • KT-65841 Allow to actualize expect types in kotlin stdlib to builtins in JVM
    • KT-53834 Support for JSpecify @NullUnmarked

    Performance Improvements

    • KT-68034 Devirtualization analysis fails to devirtualize string.get

    Fixes

    • KT-68568 K2: False-positive ACCIDENTAL_OVERRIDE caused by missing dependency class
    • KT-66723 K2: NO_ACTUAL_CLASS_MEMBER_FOR_EXPECTED_CLASS for actual typealias that extends to Java class with complicated hierarchy that includes default method
    • KT-68492 JVM IR backend: IDE / Kotlin Debugger: AE “Non-reified type parameter under ::class should be rejected by type checker” on evaluating private generic function
    • KT-61875 Native: remove support for bitcode embedding
    • KT-35305 "Overload resolution ambiguity" on function for unsigned types (UByte, UShort, UInt, ULong)
    • KT-59679 K2: Investigate extracting uncompleted candidates from blocks
    • KT-68193 JDK 21: new MutableList.addFirst/addLast methods allow adding nullable value for non-null types
    • KT-68383 K2: "Argument type mismatch: actual type is 'kotlin.String', but 'T & Any' was expected." with intersection types
    • KT-68351 K2: "Suspension functions can only be called within coroutine body"
    • KT-68674 False positive ACTUAL_WITHOUT_EXPECT in K2
    • KT-64335 K2: improve rendering of captured types in diagnostic messages
    • KT-67933 K2: no conversion between fun interfaces if target has suspend
    • KT-68350 K2: "Inapplicable candidate(s)" caused by parameter reference of local class with type parameters from function
    • KT-68362 False-positive ABSTRACT_MEMBER_NOT_IMPLEMENTED for inheritor of java class which directly implements java.util.Map
    • KT-68446 K2: compile-time failure on smart-casted generic value used as a when-subject in a contains-check with range
    • KT-68571 K2: "IllegalStateException: Fake override should have at least one overridden descriptor" caused by exceptions and when statement
    • KT-68339 K2: "Enum entry * is uninitialized here" caused by lazy property with enum in when expression
    • KT-66688 K2: false-negative "upper bound violated" error in extension receiver
    • KT-64106 Native: the compiler allows using -opt and -g at the same time
    • KT-67887 Expection on assigning to private field of value type
    • KT-67801 NSME on evaluating private member function with value class parameter
    • KT-67800 NSME on evaluating private top-level function with value class parameter
    • KT-57996 Usages of Foo @Nullable [] produce only warnings even with -Xtype-enhancement-improvements-strict-mode -Xjspecify-annotations=strict
    • KT-68630 DiagnosticsSuppressor is not invoked with Kotlin 2.0
    • KT-68222 K2. KMP. False negative Expected declaration must not have a body for expected top-level property with getter/setter
    • KT-64103 FirExpectActualDeclarationChecker reports diagnostic error for KtPsiSimpleDiagnostic with KtFakeSourceElement
    • KT-68191 K2. Static fake-overrides are not generated for kotlin Fir2IrLazyClass
    • KT-64990 K2: Remove usages of SymbolTable from FIR2IR
    • KT-67798 NSME on assigning to private delegated property of value class
    • KT-68264 K2: confusing INVISIBLE_* error when typealias is involved
    • KT-68024 K2: Gradle repo test accessors to kotlin internal task types... fails on K2
    • KT-67943 Approximation should not generate types with UPPER_BOUND_VIOLATION errors
    • KT-67503 K2: False negative "Type Expected" when attempting to annotate a wildcard type argument
    • KT-68187 K2: Create IrBuiltins in fir2ir only after IR actualization
    • KT-66443 K2: ArrayIterationHandler doesn't work if UIntArray declared in sources
    • KT-68291 K2 / Contracts: Non-existent invocation kind is suggested as a fix
    • KT-67692 Native: support LLVM opaque pointers in the compiler
    • KT-68209 K2: Strange import suggestion when lambda body contains invalid code
    • KT-67368 "NullPointerException: Parameter specified as non-null is null" local lambda creates new not-null checks with 2.0.0-Beta5
    • KT-66554 K2. Drop FIR based fake-override generator from fir2ir
    • KT-64202 K2: Drop old methods for calculation of overridden symbols for lazy declarations
    • KT-55851 K2: reference to a field from package private class crashes in runtime
    • KT-67895 K2: Properly implement generation of fake-overrides for fields
    • KT-54496 K2: REDUNDANT_MODALITY_MODIFIER diagnostic disregards compiler plugins
    • KT-63745 K2: Approximation of DNN with nullability warning attribute leads to attribute incorrectly becoming not-null
    • KT-63362 AbstractTypeApproximator fixes only first local type in hierarchy
    • KT-67769 K2: "variable must be initialized" on unreachable access in constructor
    • KT-51195 FIR IC: Incremental compilation fails with @PublishedApi property
    • KT-67966 No JVM type annotation is generated on a class supertype
    • KT-55128 Wrong type path in type annotations when type arguments are compiled to wildcards
    • KT-46640 Generate JVM type annotations on wildcard bounds
    • KT-67952 Annotations on type parameters are not generated for parameters other than the first
    • KT-68012 K2. No 'operator' modifier is required on 'component' error in K2
    • KT-61835 K2: FirStubTypeTransformer receives unresolved expressions in builder inference session
    • KT-63596 K1/K2: Different behavior for lambda with different return type
    • KT-67688 K2: False positive CANNOT_INFER_PARAMETER_TYPE for Unit constraint type variable
    • KT-62080 False positive UNUSED_VARIABLE for variable that is used in lambda and in further code with several conditions
    • KT-60726 K2: Missed TYPE_MISMATCH error: inferred type non-suspend function but suspend function was expected
    • KT-41835 [FIR] Green code turns to red in presence of smartcasts and redundant type arguments
    • KT-67579 K1/JVM: false-negative annotation-based diagnostics on usages of ABI compiled with non-trivially configured generation of default methods
    • KT-67493 K2: argument type mismatch: actual type is 'T', but 'T' was expected
    • KT-64900 K2: getConstructorKeyword call in PsiRawFirBuilder.toFirConstructor forces AST load
    • KT-67648 K2: wrong exposed visibility errors with WRONG_MODIFIER_CONTAINING_DECLARATION on top-level enum class
    • KT-58686 FIR2IR: Don't use global counters
    • KT-67592 K2: Success execution of :kotlin-stdlib:compileKotlinMetadata
    • KT-60398 K2: consider forbidding FirBasedSymbol rebind
    • KT-54918 Refactor transformAnonymousFunctionWithExpectedType
    • KT-63360 K2: Malformed type mismatch error with functional type
    • KT-67266 K2: disappeared INLINE_CLASS_DEPRECATED
    • KT-67569 K2: Fix default value parameters of Enum's constructor if it's declared in source code
    • KT-67378 K2: Don't use wrapScopeWithJvmMapped for common source sets
    • KT-67738 K2: Introduce kotlin.internal.ActualizeByJvmBuiltinProvider annotation
    • KT-67136 Put $this parameter to LVT for suspend lambdas
    • KT-62538 K2: Declarations inside external classes should be implicitly external
    • KT-67627 K2: External interface companion isn't external in IR
    • KT-60290 K2: origin is not set for !in operator
    • KT-67512 K2: false positive WRONG_GETTER_RETURN_TYPE when getter return type is annotated
    • KT-67635 K2: No warning TYPE_MISMATCH_WHEN_FLEXIBILITY_CHANGES for SAM constructor with inferred type
    • KT-67598 K2: Fix incorrect casting UByte to Number in FirToConstantValueTransformer
    • KT-56564 False positive "non-exhaustive when" in case of intersection type
    • KT-63969 K2: extra property in metadata
    • KT-63968 K2: extra property in metadata for anonymous variable in script
    • KT-67547 K/N can't build caches, fails with "clang++: error=2, No such file or directory"
    • KT-64457 K2: Fix DecompiledKnmStubConsistencyK2TestGenerated
    • KT-67102 IR Evaluator: NoSuchFieldException when accessing a private delegated property
    • KT-66377 IR Evaluator: "no container found for type parameter" when evaluating nested generics
    • KT-66378 IR Evaluator: Symbol is unbound
    • KT-64506 IDE, IR Evaluator: NPE in ReflectiveAccessLowering.fieldLocationAndReceiver when evaluating private static properties
    • KT-67380 K2: Don't check for equals overriding for class Any
    • KT-67038 K2: Missing type of FirLiteralExpression causes an exception for property initializer type resolution
    • KT-59813 K2: Fix the TODO about firEffect.source in FirReturnsImpliesAnalyzer
    • KT-59834 K2: Fix the TODO about merge(other) in UnusedChecker
    • KT-59833 K2: Stop modifying values of enum entries
    • KT-59188 K2: Change positioning strategy for WRONG_NUMBER_OF_TYPE_ARGUMENTS error
    • KT-59108 K2. SMARTCAST_IMPOSSIBLE instead of UNSAFE_IMPLICIT_INVOKE_CALL
    • KT-65503 The inline processor cannot handle objects inside the lambda correctly when calling an inline function from another module
    • KT-30696 NoSuchMethodError if nested anonymous objects are used with propagation reified type parameter
    • KT-58966 Incorrect type inference for parameters with omitted type of anonymous function that is being analyzed as value of function type with receiver
    • KT-67458 Use @PhaseDescription for JVM backend lowering phases
    • KT-65647 K2 ignores diagnostics on sourceless FirTypeRefs
    • KT-64489 K2: Rename FirAugmentedArraySet
    • KT-67394 FIR: Make FIR repr of For from PSI and LightTree the same
    • KT-60261 K2: No origin is set for composite assignment operators
    • KT-66724 K2 IDE. False positive errors because of wrong type inference in complex case of delegated property and type arguments
    • KT-40248 Confusing error message NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY
    • KT-66947 K2: false-positive JSpecify nullability enhancement warning on Java wildcard type argument with same base type but different nullabilities as upper and lower bounds
    • KT-66974 K2: false-negative JSpecify nullability enhancement warning on nullable projection of Java wildcard type argument with non-null bounds in out-position
    • KT-66946 K2: false-negative JSpecify nullability enhancement warning on Java wildcard type argument with nullable upper bound in out-position
    • KT-66442 K2: No visibility error on importing private aliases
    • KT-66598 K2: Allow comparisons, is-checks and casts between Kotlin and platform types
    • KT-55966 K2: Not enough information to infer type variable K if smartcast is used
    • KT-64957 K1: drop ModuleAnnotationResolver
    • KT-64894 OPT_IN_ARGUMENT_IS_NOT_MARKER diagnostic message is unclear
    • KT-67019 K2: IR has incorrect EQ origins for some inplace updating operators
    • KT-59810 K2: Support other ConstraintPosition-s
    • KT-55383 K1/K2: isClassTypeConstructor behaves differently for stub types
    • KT-60089 K2: Introduced ERROR_IN_CONTRACT_DESCRIPTION
    • KT-60382 K2: Refactor ExpectActualCollector
    • KT-62929 K2: investigate if guessArrayTypeIfNeeded is necessary in annotation loader
    • KT-65642 K2: IR: Array access desugaring doesn't have origins
    • KT-24807 No smartcast to Boolean in subject of when-expression when subject type is non-nullable
    • KT-66057 K2: incorrect supertype leads to class declaration being highlighted red
    • KT-63958 K2: drop support of UseBuilderInferenceOnlyIfNeeded=false
    • KT-63959 K2: treat stub types as non-nullable for isReceiverNullable check
    • KT-65100 IrFakeOverrideBuilder: support custom 'remove(Int)' handling logic in MutableCollection subclasses

    Compose compiler

    New features

    • cdfe659 Changed how compiler features being rolled out are enabled and disabled in compiler plugin CLI. Features, such as strong skipping and non-skipping group optimizations are now enabled through the "featureFlag" option instead of their own option.

    IR. Actualizer

    • KT-66307 K2: property fake override isn't generated for protected field

    IR. Inlining

    • KT-67660 Suspicious package part FQN calculation in InventNamesForLocalClasses
    • KT-67208 KJS: put ReplaceSuspendIntrinsicLowering after IR inliner
    • KT-64958 KJS: Put as many as possible lowerings after the inliner
    • KT-67297 Implement IR deserializer with unbound symbols

    IR. Tree

    • KT-67650 Add default implementations to methods for non-leaf IrSymbol subclasses from SymbolRemapper
    • KT-67649 Autogenerate IrSymbol interface hierarchy
    • KT-44721 IR: merge IrPrivateSymbolBase and IrPublicSymbolBase hierarchies
    • KT-67580 Autogenerate SymbolRemapper
    • KT-67457 Introduce a way to simplify IR lowering phase creation

    JavaScript

    New Features

    • KT-18891 JS: provide a way to declare static members (JsStatic?)

    Fixes

    • KT-68053 K2: NON_EXPORTABLE_TYPE on a typealias of primitive type
    • KT-68740 Kotlin/JS 2.0.0 IrLinkageError with dynamic function parameters inside data classes
    • KT-62304 K/JS: Investigate the compiler assertion crash in JS FIR with backend tests
    • KT-65018 JS: Deprecate error tolerance
    • KT-64801 K2 + JS and WASM: Inner with default inner doesn't work properly
    • KT-67248 ModuleDescriptor in JS Linker contains incorrect friend dependecies
    • KT-67273 Creating Kotlin Collections from JS collections
    • KT-64424 K2: Migrate JsProtoComparisonTestGenerated to K2
    • KT-52602 Kotlin/JS + IR: incompatible ABI version is not reported when no declarations are actually used by a Gradle compilation
    • KT-66092 K/JS & Wasm: .isReified for reified upper bound is wrongly false
    • KT-67112 Unable to apply @JsStatic for common sources: [NO_CONSTRUCTOR]
    • KT-62329 KJS: "UnsupportedOperationException: Empty collection can't be reduced" caused by external enum with "@JsExport"
    • KT-67018 K/JS: Executable js file for module-kind=umd contains top level this instead of globalThis
    • KT-64776 Test infra for JS can't process dependency in mpp module
    • KT-65076 Use the same instance when a fun interface doesn't capture or capture only singletons

    Klibs

    • KT-68202 KLIB metadata: nested classes are sometimes inside a different 'knm' chunk
    • KT-66968 Provide K/N platforms libs for all available targets
    • KT-66967 Provide K/N stdlib for all available targets in all distributions
    • KT-65834 [KLIB Resolve] Drop library versions in KLIB manifests
    • KT-67446 [KLIB Tool] Drop "-repository <path>" CLI parameter
    • KT-67445 [KLIB Tool] Drop "install" and "remove" commands
    • KT-66557 Check, that no bad metadata in klib is produced, when we failed to compute constant value

    Language Design

    • KT-11914 Confusing data class copy with private constructor

    Libraries

    • KT-51483 Documentation of trimMargin is (partly) difficult to understand
    • KT-64649 Add explanation to "A compileOnly dependency is used in the Kotlin/Native target" warning message
    • KT-67807 JS/Wasm: ByteArray.decodeToString incorrectly handles ill-formed 4-byte sequences with a 2nd byte not being continuation byte
    • KT-67768 Wasm: ByteArray.decodeToString throws out-of-bounds exception if the last byte is a start of a 4-byte sequence
    • KT-66896 Improve Array contentEquals and contentDeepEquals documentation

    Native

    • KT-68094 K2/Native: Member inherits different '@Throws' when inheriting from generic type
    • KT-67583 compileKotlin-task unexpectedly downloads K/N dependencies on Linux (but doesn't on Mac)

    Native. C and ObjC Import

    • KT-65260 Native: compiler crashes when casting to an Obj-C class companion

    Native. ObjC Export

    • KT-65666 Native: enable objcExportSuspendFunctionLaunchThreadRestriction=none by default

    Native. Runtime. Memory

    • KT-67779 Native: SpecialRefRegistry::ThradData publication prolongs the pause in CMS
    • KT-66644 Native: threads are too often paused to assist GC (with concurrent mark)
    • KT-66918 Native: scan global root set concurrently

    Native. Swift Export

    • KT-68259 Swift export: secondary constructs lead to compilation errors
    • KT-67095 Native: fix testNativeRefs export test
    • KT-67099 Remove SirVisitor and SirTransformer from code
    • KT-67003 Abandon PackageInflator implementation in favour of PackageProvider component

    Native. Testing

    • KT-68500 Native: Drop custom logic in ExtTestCaseGroupProvider, mute codegen/box tests explicitly

    Tools. CLI

    • KT-67939 Add CLI argument to enable when guards feature
    • KT-68060 FastJarFS fails on empty jars

    Tools. CLI. Native

    • KT-64524 Introduce a CLI argument to override native_targets field in klib manifest

    Tools. Compiler Plugin API

    • KT-68020 K2: run FirSupertypeGenerationExtension over generated declarations

    Tools. Compiler Plugins

    • KT-67605 K2 parcelize: false positive NOTHING_TO_OVERRIDE in one test
    • KT-64455 K2: Implement ParcelizeIrBoxTestWithSerializableLikeExtension for K2

    Tools. Fleet. ObjC Export

    • KT-68051 [ObjCExport] Support reserved method names

    Tools. Gradle

    • KT-68447 ill-added intentionally-broken dependency source configurations
    • KT-68278 Spring resource loading in combination with java-test-fixtures plugin broken
    • KT-66452 Gradle produces false positive configuration cache problem for Project usage at execution time
    • KT-68242 Run tests against AGP 8.4.0
    • KT-61574 Add project-isolation test for Kotlin/Android plugin
    • KT-65936 Provide a detailed error for changing kotlin native version dependency.
    • KT-67888 Remove usages of deprecated Configuration.fileCollection() method
    • KT-62684 PropertiesBuildService should load extraProperties only once
    • KT-67288 Test DSL should not fail the test if build scan publishing has failed

    Tools. Gradle. JS

    • KT-68482 KotlinNpmInstallTask is not compatible with configuration cache
    • KT-68072 K/JS, K/Wasm: Module not found in transitive case
    • KT-68103 K/JS, K/Wasm: Generation of test compilation's package.json requires main compilation
    • KT-67924 K/JS, K/Wasm: kotlinNpmInstall can rewrite root package.json

    Tools. Gradle. Kapt

    • KT-64627 Kapt3KotlinGradleSubplugin uses property lookup that breaks project isolation

    Tools. Gradle. Multiplatform

    • KT-64109 Using compileOnly/runtimeOnly dependencies in K/N-related configurations leads to odd behaviour
    • KT-58319 kotlin.git: ProjectMetadataProviderImpl "Unexpected source set 'commonMain'"

    Tools. Gradle. Native

    • KT-65761 Missing JDK Platform ClassLoader when compiling Kotlin native in daemon
    • KT-67935 OverriddenKotlinNativeHomeChecker does not work well with relative paths
    • KT-64430 Remove deprecated KotlinToolRunner(project) constructor
    • KT-64427 Stop using deprecated KotlinToolRunner(project) constructor call

    Tools. Incremental Compile

    • KT-63476 Investigate the debug output of JVM compilation in KMP IC smoke tests

    Tools. JPS

    • KT-63707 JPS: "Multiple values are not allowed for" caused by Compose

    Tools. Kapt

    • KT-67495 File leak in when building with kapt
    • KT-66780 K2 KAPT Kotlinc should exit with an exit code 1 (compilation error) if a Kapt task fails
    • KT-66998 K2 KAPT: Reimplement support for DefaultImpls

    Tools. Scripts

    • KT-67575 FromConfigurationsBase script definition unexpected behaviour with regex from gradle templates
    • KT-67066 DeepCopyIrTreeWithSymbols does not copy IrScript nodes correctly
    • KT-67071 K2: ScriptCompilationConfigurationFromDefinition is not serializable
    • KT-67063 LauncherReplTest flaky on Windows

    Tools. Wasm

    • KT-67468 Gradle task build (allTests) fails on default web project
    • KT-67862 K/Wasm: Make usage of ChromeWasmGc an error

    Open source →
14. 2.0.105 Aug 2024
    Release notes

    2.0.10

    Apple Ecosystem

    • KT-68257 Xcode incorrectly reuses embedAndSign framework when moving to and from 2.0.0

    Compiler

    Fixes

    • KT-69876 K2 Compile exception: Only IrBlockBody together with kotlinx serialization
    • KT-68521 K2: Property's private setters can be bypassed when using plusAssign and minusAssign operators
    • KT-68667 K2: Compiler hangs on mapNotNull and elvis inside lambda
    • KT-68747 K2: Long compilation time because of constraint solving when using typealias in different modules
    • KT-68940 K2: "IllegalArgumentException: All variables should be fixed to something"
    • KT-68797 K2 / Native: "java.lang.IllegalStateException: FIELD" caused by enabled caching
    • KT-68362 False-positive ABSTRACT_MEMBER_NOT_IMPLEMENTED for inheritor of java class which directly implements java.util.Map
    • KT-68449 K2: "when" expression returns Unit
    • KT-67072 K2: inconsistent stability of open vals on receivers of final type
    • KT-68570 K2: "Unresolved reference" in call with lambda argument and nested lambda argument
    • KT-69159 K2: KotlinNothingValueException in Exposed
    • KT-68623 K2: "Only safe or null-asserted calls are allowed" on safe call
    • KT-68193 JDK 21: new MutableList.addFirst/addLast methods allow adding nullable value for non-null types
    • KT-67804 removeFirst and removeLast return type with Java 21
    • KT-68727 K2: "Null argument in ExpressionCodegen for parameter VALUE_PARAMETER" caused by an enum class with default parameter in a different module
    • KT-68383 K2: "Argument type mismatch: actual type is 'kotlin.String', but 'T & Any' was expected." with intersection types
    • KT-68546 K2: false-positive conflicting overloads error on inheriting generic type with inherited generic and non-generic member overloads
    • KT-68626 K2: "Conflicting Overloads" for function if inherited from generic type
    • KT-68351 K2: "Suspension functions can only be called within coroutine body"
    • KT-68489 K2: WRONG_ANNOTATION_TARGET with Java and Kotlin @Target annotation positions
    • KT-69058 K2: Java-defined property annotations not persisted
    • KT-64515 K2 IDE: [NEW_INFERENCE_ERROR] in a build.gradle.kts script while applying "jvm-test-suite" plugin and then configuring targets for test suites
    • KT-68016 K2: Gradle repo test should compile correctly with Kotlin explicit api mode fails on K2
    • KT-68575 K2: @ParameterName annotation is not erased when inferring the type of it in lambdas
    • KT-67999 K2: lost flexibility on parameters of Java SAM
    • KT-59679 K2: Investigate extracting uncompleted candidates from blocks
    • KT-68401 K2: "IllegalAccessError: failed to access class" caused by package private super Java type, when inferencing a common super type of if or when branches on JVM
    • KT-68806 K/Wasm RuntimeError: unreachable on Sequence::toList
    • KT-68455 K2: False negative UPPER_BOUND_VIOLATED_BASED_ON_JAVA_ANNOTATIONS
    • KT-68538 KJS/K2: using while with break inside inline lambdas leads to an endless cycle
    • KT-68798 JVM compiler crashes on calling private expect constructor with a default parameter
    • KT-68734 K2: enum class in KMP: Expect declaration MMKVLogLevel is incompatible with actual MMKVLogLevel because modality is different
    • KT-68674 False positive ACTUAL_WITHOUT_EXPECT in K2
    • KT-68350 K2: "Inapplicable candidate(s)" caused by parameter reference of local class with type parameters from function
    • KT-68571 K2: "IllegalStateException: Fake override should have at least one overridden descriptor" caused by exceptions and when statement
    • KT-68523 K2: FileAnalysisException when using Definitely non-nullable types
    • KT-68339 K2: "Enum entry * is uninitialized here" caused by lazy property with enum in when expression
    • KT-66688 K2: false-negative "upper bound violated" error in extension receiver
    • KT-68630 DiagnosticsSuppressor is not invoked with Kotlin 2.0
    • KT-68222 K2. KMP. False negative Expected declaration must not have a body for expected top-level property with getter/setter
    • KT-64103 FirExpectActualDeclarationChecker reports diagnostic error for KtPsiSimpleDiagnostic with KtFakeSourceElement
    • KT-68191 K2. Static fake-overrides are not generated for kotlin Fir2IrLazyClass
    • KT-68024 K2: Gradle repo test accessors to kotlin internal task types... fails on K2
    • KT-64957 K1: drop ModuleAnnotationResolver

    Compose compiler

    • 0c5a858 Fix memoization of captureless lambdas when K2 compiler is used b/340582180
    • a8249d6 Allow memoizing lambdas in composable inline functions b/340606661

    Native

    • KT-68094 K2/Native: Member inherits different '@Throws' when inheriting from generic type

    Tools. Compiler Plugins

    • KT-69187 Compose compiler for web doesn't support rememberComposableLambda
    • KT-68557 K2. Supertypes resolution of KJK hierarchy fails in presence of allopen plugin

    Tools. Compiler plugins. Serialization

    • KT-68850 Compose lambda type not transformed with KGP 2 + new Compose plugin

    Tools. Daemon

    • KT-68297 KGP 2.0 regression: JAVA_TOOL_OPTIONS is not considered in Kotlin daemon creation

    Tools. Gradle

    • KT-69330 KotlinCompile friendPathsSet property is racy due causing build cache invalidation
    • KT-69026 Mark AGP 8.5.0 as compatible with KGP
    • KT-68447 ill-added intentionally-broken dependency source configurations
    • KT-69078 Gradle: Add option to disable FUS Service
    • KT-68278 Spring resource loading in combination with java-test-fixtures plugin broken
    • KT-66452 Gradle produces false positive configuration cache problem for Project usage at execution time
    • KT-68242 Run tests against AGP 8.4.0

    Tools. Gradle. Multiplatform

    • KT-68805 KMP project (re-)import took a long time for downloading platform libs
    • KT-68248 kotlin multiplatform project fail to build on Fedora with corretto

    Tools. Gradle. Native

    • KT-68638 KGP 2.0 breaks native test with api dependencies and configuration cache
    • KT-65761 Missing JDK Platform ClassLoader when compiling Kotlin native in daemon

    Tools. JPS

    • KT-69204 Generate lookups in dumb mode for compatibility with ref index

    Tools. Kapt

    • KT-68171 K2KAPT: boxed return types in overridden methods changed to primitives

    Tools. Scripts

    • KT-68681 K2 / CLI / Script: "NullPointerException: getService(...) must not be null" caused by @DependsOn
    • KT-67747 K2: regression in Spring unit tests using javax.script.ScriptEngine

    Open source →
15. 2.0.10-RC229 Jul 2024pre-release
    Release notes

    2.0.10-RC2

    Frontend

    • KT-69876 K2 Compile exception: Only IrBlockBody together with kotlinx serialization

    Open source →
16. 2.0.10-RC11 Jul 2024pre-release
    Release notes

    Changelog

    Apple Ecosystem

    • KT-68257 Xcode incorrectly reuses embedAndSign framework when moving to and from 2.0.0

    Compiler

    Fixes

    • KT-68521 K2: Property's private setters can be bypassed when using plusAssign and minusAssign operators
    • KT-68667 K2: Compiler hangs on mapNotNull and elvis inside lambda
    • KT-68747 K2: Long compilation time because of constraint solving when using typealias in different modules
    • KT-68940 K2: "IllegalArgumentException: All variables should be fixed to something"
    • KT-68797 K2 / Native: "java.lang.IllegalStateException: FIELD" caused by enabled caching
    • KT-68362 False-positive ABSTRACT_MEMBER_NOT_IMPLEMENTED for inheritor of java class which directly implements java.util.Map
    • KT-68449 K2: "when" expression returns Unit
    • KT-67072 K2: inconsistent stability of open vals on receivers of final type
    • KT-68570 K2: "Unresolved reference" in call with lambda argument and nested lambda argument
    • KT-69159 K2: KotlinNothingValueException in Exposed
    • KT-68623 K2: "Only safe or null-asserted calls are allowed" on safe call
    • KT-68193 JDK 21: new MutableList.addFirst/addLast methods allow adding nullable value for non-null types
    • KT-67804 removeFirst and removeLast return type with Java 21
    • KT-68727 K2: "Null argument in ExpressionCodegen for parameter VALUE_PARAMETER" caused by an enum class with default parameter in a different module
    • KT-68383 K2: "Argument type mismatch: actual type is 'kotlin.String', but 'T & Any' was expected." with intersection types
    • KT-68546 K2: false-positive conflicting overloads error on inheriting generic type with inherited generic and non-generic member overloads
    • KT-68626 K2: "Conflicting Overloads" for function if inherited from generic type
    • KT-68351 K2: "Suspension functions can only be called within coroutine body"
    • KT-68489 K2: WRONG_ANNOTATION_TARGET with Java and Kotlin @Target annotation positions
    • KT-69058 K2: Java-defined property annotations not persisted
    • KT-64515 K2 IDE: [NEW_INFERENCE_ERROR] in a build.gradle.kts script while applying "jvm-test-suite" plugin and then configuring targets for test suites
    • KT-68016 K2: Gradle repo test should compile correctly with Kotlin explicit api mode fails on K2
    • KT-68575 K2: @ParameterName annotation is not erased when inferring the type of it in lambdas
    • KT-67999 K2: lost flexibility on parameters of Java SAM
    • KT-59679 K2: Investigate extracting uncompleted candidates from blocks
    • KT-68401 K2: "IllegalAccessError: failed to access class" caused by package private super Java type, when inferencing a common super type of if or when branches on JVM
    • KT-68806 K/Wasm RuntimeError: unreachable on Sequence::toList
    • KT-68455 K2: False negative UPPER_BOUND_VIOLATED_BASED_ON_JAVA_ANNOTATIONS
    • KT-68538 KJS/K2: using while with break inside inline lambdas leads to an endless cycle
    • KT-68798 JVM compiler crashes on calling private expect constructor with a default parameter
    • KT-68734 K2: enum class in KMP: Expect declaration MMKVLogLevel is incompatible with actual MMKVLogLevel because modality is different
    • KT-68674 False positive ACTUAL_WITHOUT_EXPECT in K2
    • KT-68350 K2: "Inapplicable candidate(s)" caused by parameter reference of local class with type parameters from function
    • KT-68571 K2: "IllegalStateException: Fake override should have at least one overridden descriptor" caused by exceptions and when statement
    • KT-68523 K2: FileAnalysisException when using Definitely non-nullable types
    • KT-68339 K2: "Enum entry * is uninitialized here" caused by lazy property with enum in when expression
    • KT-66688 K2: false-negative "upper bound violated" error in extension receiver
    • KT-68630 DiagnosticsSuppressor is not invoked with Kotlin 2.0
    • KT-68222 K2. KMP. False negative Expected declaration must not have a body for expected top-level property with getter/setter
    • KT-64103 FirExpectActualDeclarationChecker reports diagnostic error for KtPsiSimpleDiagnostic with KtFakeSourceElement
    • KT-68191 K2. Static fake-overrides are not generated for kotlin Fir2IrLazyClass
    • KT-68024 K2: Gradle repo test accessors to kotlin internal task types... fails on K2
    • KT-64957 K1: drop ModuleAnnotationResolver

    Compose compiler

    • 0c5a858 Fix memoization of captureless lambdas when K2 compiler is used b/340582180
    • a8249d6 Allow memoizing lambdas in composable inline functions b/340606661

    Native

    • KT-68094 K2/Native: Member inherits different '@Throws' when inheriting from generic type

    Tools. Compiler Plugins

    • KT-69187 Compose compiler for web doesn't support rememberComposableLambda
    • KT-68557 K2. Supertypes resolution of KJK hierarchy fails in presence of allopen plugin

    Tools. Compiler plugins. Serialization

    • KT-68850 Compose lambda type not transformed with KGP 2 + new Compose plugin

    Tools. Daemon

    • KT-68297 KGP 2.0 regression: JAVA_TOOL_OPTIONS is not considered in Kotlin daemon creation

    Tools. Gradle

    • KT-69330 KotlinCompile friendPathsSet property is racy due causing build cache invalidation
    • KT-69026 Mark AGP 8.5.0 as compatible with KGP
    • KT-68447 ill-added intentionally-broken dependency source configurations
    • KT-69078 Gradle: Add option to disable FUS Service
    • KT-68278 Spring resource loading in combination with java-test-fixtures plugin broken
    • KT-66452 Gradle produces false positive configuration cache problem for Project usage at execution time
    • KT-68242 Run tests against AGP 8.4.0

    Tools. Gradle. Multiplatform

    • KT-68805 KMP project (re-)import took a long time for downloading platform libs
    • KT-68248 kotlin multiplatform project fail to build on Fedora with corretto

    Tools. Gradle. Native

    • KT-68638 KGP 2.0 breaks native test with api dependencies and configuration cache
    • KT-65761 Missing JDK Platform ClassLoader when compiling Kotlin native in daemon

    Tools. JPS

    • KT-69204 Generate lookups in dumb mode for compatibility with ref index

    Tools. Kapt

    • KT-68171 K2KAPT: boxed return types in overridden methods changed to primitives

    Tools. Scripts

    • KT-68681 K2 / CLI / Script: "NullPointerException: getService(...) must not be null" caused by @DependsOn
    • KT-67747 K2: regression in Spring unit tests using javax.script.ScriptEngine

    Open source →
17. 2.0.020 May 2024
    Release notes

    Changelog

    Analysis. API

    New Features

    • KT-65327 Support reading klib contents in Analysis API

    Performance Improvements

    • KT-65560 K2: Anaysis API: ContextCollector triggers redundant resolution in the case of file elements
    • KT-64987 Analysis API: 50GB memory allocation on creating empty kotlinx.collections.immutable.persistentMapOf
    • KT-61789 K2: optimize getFirForNonKtFileElement for references inside super type reference
    • KT-59498 K2: getOnAirGetTowerContextProvider took too much time due to on air resolve
    • KT-61728 Analysis API: optimize AllCandidatesResolver.getAllCandidates

    Fixes

    • KT-65561 Analysis API: dummy.kt is not a physical file
    • KT-65616 K2: FirDeclarationStatusImpl cannot be cast to FirResolvedDeclarationStatus from STATUS
    • KT-65600 Analysis Api: FirFile for KtCodeFragments are created and not updated on changes
    • KT-64919 K2 IDE: Implement KMP support for sealed class inheritors
    • KT-64241 K2: Unresolved calls to functions in scripts depending on included projects
    • KT-65813 Analysis API Standalone: FirDeclarationForCompiledElementSearcher does not find compiled elements
    • KT-66052 AA: render expect/actual modifier
    • KT-66795 KtCodeFragment.clone() is broken
    • KT-66532 K2 CodeGen AA: missing annotation setup for function in source module but not in a compile target file
    • KT-64833 Analysis API: Members implemented by delegation have no overridden symbols
    • KT-62405 Analysis API: Symbols SUBSTITUTION_OVERRIDE have no overridden symbols
    • KT-66749 K2: "Collection contains no element matching the predicate" on an unresolved call
    • KT-62832 K2: ClassCastException: FirDeclarationStatusImpl cannot be cast to FirResolvedDeclarationStatus
    • KT-66719 AbstractGetKlibSourceFileNameTest: The dependency to ":native:analysis-api-klib-reader" breaks JPS compilation
    • KT-66603 Analysis API: support type annotations in KtPsiTypeProviderMixIn#asPsiType
    • KT-64505 Analysis API Standalone: Remove test-specific calculation of sealed class inheritors
    • KT-66013 Analysis API Standalone: Sealed inheritors aren't correctly calculated for source classes
    • KT-62880 K2 IDE: Unresolved java annotation methods in KDoc
    • KT-66530 K2: Analysis API: KtPsiTypeProvider#asKtType crashes on PsiClassType for Java type parameter with wrong use site
    • KT-65571 Support VirtualFile inputs to Analysis API modules
    • KT-66485 Substituted types are not provided for callable references
    • KT-66498 Analysis API: 'KtFe10SymbolDeclarationOverridesProvider' considers a class to be a subclass of itself
    • KT-64579 K2 IDE: "Expected FirResolvedArgumentList for FirAnnotationCallImpl of FirValueParameterImpl(Source) but FirArgumentListImpl found"
    • KT-65978 Analysis API: Use soft references in FileStructureCache
    • KT-64051 K2 IDE: Analysis API: Unresolved links to typealias in KDoc
    • KT-66189 K2 / IDE: KtFirExpressionTypeProvider bugs
    • KT-61422 K2 IDE: "No array element type for vararg value parameter: org.jetbrains.kotlin.fir.declarations.impl.FirValueParameterImpl"
    • KT-66276 K2: Analysis API: TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM false positive for script parameter
    • KT-66232 K2: Analysis API: cover ScriptWithCustomDefDiagnosticsTestBaseGenerated by LL FIR tests
    • KT-60996 K2: Stub Based Deserializer: Set versionRequirements to enable VERSION_REQUIREMENT_DEPRECATION diagnostics
    • KT-66306 K2: Analysis API: drop ability to enable global phase resolve lock
    • KT-55750 LL FIR: Implement multi-threaded resolve
    • KT-65563 Analysis API: Missing session component FirExpectActualMatchingContextFactory in LLFirLibrarySession
    • KT-66173 K2: No 'org.jetbrains.kotlin.fir.scopes.impl.FirDelegatedMembersFilter' in array owner: LLFirLibrarySession
    • KT-66238 Gradle kotlin build scripts - a lot of unresolved symbols after latest changes in kotlin master
    • KT-65099 K2: Recursive local storage cache check for Fir2IrDeclarationStorage::createAndCacheIrPropertySymbols()
    • KT-65265 Analysis API: Add library session invalidation tests
    • KT-56288 Analysis API: Add tests for session invalidation on the Analysis API side
    • KT-64000 K2: make AnnotationArgumentsStateKeepers more accurate
    • KT-63606 K2: Analysis API: rewrite FirLazyAnnotationTransformer to avoid redundant transformations
    • KT-65191 KtFirMultiplatformInfoProvider#getExpectForActual doesn't return expect function for slightly broken code
    • KT-62136 Analysis API: Add concurrent tests for CleanableSoftValueCache
    • KT-61222 K2: Add lifecycle management for KtResolveExtension
    • KT-65960 Analysis API: Test infrastructure indexes binary libraries from decompiled files instead of stubs during IDE mode tests
    • KT-65240 K2: CodeGen API fails to resolve Annotation parameter type when it runs FIR2IR for a class with a parent class from other module if the parent class has an annotation from another module
    • KT-65344 K2: make FirScript statements (declarations) independent
    • KT-65930 AA: receiver type for Int?::foo misses nullability
    • KT-65914 AA: receiver type for this::foo returns return type of the target callable
    • KT-62071 Analysis API: KtFirScopeProvider.getScopeContextForPosition throws exception when ImplicitReceiverValue.implicitScope is null
    • KT-65780 K2: polish FileStructure implementation for FirFile
    • KT-62840 K2 Script: everything around destructuring declaration on top level of scripts are broken
    • KT-64528 K2 IDE: MPP: unregistered component 'org.jetbrains.kotlin.fir.scopes.impl.FirDelegatedMembersFilter'
    • KT-64921 K2 IDE: references in platform code resolve to expect classifier instead of actual
    • KT-61296 K2: do not resolve the entire file on lazyResolve call if FirFile is passed
    • KT-65683 Analysis API: Dangling file session creation causes a computeIfAbsent contract violation
    • KT-64884 K2 IDE. FP [NAMED_PARAMETER_NOT_FOUND] for copy method of library data class when class has not parameter-properties
    • KT-65763 K2: value parameter from library data class copy have RAW_FIR phase
    • KT-65665 Analysis API: support KtDelegatedSuperTypeEntry in KtFirExpressionInfoProvider.isUsedAsExpression
    • KT-62899 K2 IDE. IDE ignores @Suppress annotation for errors
    • KT-65655 Analysis API: KtCodeCompilationException should not strongly reference FIR sessions
    • KT-62302 Support PsiType -> KtType conversion
    • KT-64604 K2: IDE K2: "Modules are inconsistent during performance tests"
    • KT-65345 K2: unify FirDesignation and LLFirResolveTarget
    • KT-61757 K2 IDE: resolution to buitlins does not work for from common module
    • KT-65268 K2: Checking the presence of the delegated constructor call forces AST loading
    • KT-63330 Analysis API: Stub-based deserialized symbol providers provide unresolved enum entry annotation arguments
    • KT-65418 Analysis API: LLFirAbstractSessionFactory loads anchor module sessions eagerly
    • KT-64718 Analysis API: do not expose SealedClassInheritorsProvider and FirRegularClass to IDE Plugin
    • KT-65075 K2: getContainingDeclaration() is broken for declarations inside code fragments
    • KT-61332 Support KtTypeCodeFragment in PsiRawFirBuilder
    • KT-65150 AA: incorrect result from KtTypeProvider#getReceiverTypeForDoubleColonExpression for Java static method
    • KT-56551 LL FIR: implement parallel resolve for jumping phases
    • KT-65223 Psi: avoid KtFile usages
    • KT-65307 Analysis API FE10: support KtFe10AnalysisSessionProvider.getAnalysisSessionByUseSiteKtModule
    • KT-62695 K2 IDE: Unresolved extension functions in KDoc
    • KT-65152 Analysis API: KDoc references to packages are not fully resolved
    • KT-64988 K2 IDE: Navigation from the named argument in safe call does not work
    • KT-63195 AA: incorrect results from KtTypeProvider#getReceiverTypeForDoubleColonExpression
    • KT-64074 K2: Investigate LL divergence for Script.testTopLevelPropertyInitialization
    • KT-62441 K2: IDE K2: "No dangling modifier found"
    • KT-62895 K2 IDE. FP 'when' expression must be exhaustive with sealed interface from library
    • KT-64993 Analysis API: KtExpressionTypeProvider.getExpectedType works incorrectly for arguments of safe calls
    • KT-64883 Allow direct creation of KtCommonFile
    • KT-64646 K2: properly forbid ast loading during raw fir phase in tests
    • KT-64862 Psi: missed parenthesis in type reference presentation
    • KT-62893 K2 IDE. FP 'when' expression must be exhaustive with Java sealed interface from library
    • KT-63795 K2: lazyResolveToPhase(BODY_RESOLVE) cannot be called from a transformer with a phase BODY_RESOLVE from SealedClassInheritorsProviderIdeImpl
    • KT-64805 Analysis API: introduce common entry point for multi-file test cases
    • KT-64714 K2: Analysis API: CollectionsKt.map doesn't resolves from Java in kotlin repo
    • KT-64647 K2: Allow to calculate decompiled inheritors for sealed classes in tests
    • KT-64595 AA: stackoverflow while simplifying a type with a recursive type parameter
    • KT-64825 Analysis API. Cannot compute containing PSI for unknown source kind 'org.jetbrains.kotlin.KtFakeSourceElementKind$DefaultAccessor' exception on getContainingSymbol call for default setter parameter
    • KT-64080 K2: Analysis API: On-air resolve does not trigger resolution of delegated super call arguments
    • KT-64243 K2: proper lazy resolution for fake overrides
    • KT-62891 K2 IDE. FP [EXPOSED_FUNCTION_RETURN_TYPE] on overriding library method which returns protected type
    • KT-62667 K2: Cannot find enclosing declaration for KtNameReferenceExpression (on-air, imports)
    • KT-61890 Analysis API: Migrate KtFirScopeProvider to ContextCollector instead of onAirResolve
    • KT-64197 K2: Code fragments are only supported in JVM
    • KT-62357 K2 IDE. False positive on generated component methods and false negative on getter of @JvmRecord classes in Java
    • KT-62892 K2 IDE. Java outer class from other module is not resolved when nested class is accessed with fq name in a type position
    • KT-62888 K2 IDE. IDE infers reference to KMutableProperty as reference to just KProperty
    • KT-64584 K2: StubBasedFirDeserializedSymbolProvider: support deserialization of delegated declarations
    • KT-60324 K2 IDE: "NoSuchElementException: List is empty at JavaOverrideChecker#buildErasure"
    • KT-62896 K2 IDE. FP ABSTRACT_MEMBER_NOT_IMPLEMENTED on inheriting class from library which implements interface by delegation
    • KT-62947 Analysis API: Error while resolving FirPropertyImpl
    • KT-64468 Analysis API: Implement mixed multi-module tests which support different kinds of KtModules
    • KT-56541 Symbol Light Classes: No @NotNull annotations are generated for accessors of lateinit properties of unresolved types
    • KT-63547 K2 IDE. False Positive AMBIGUOUS_ANNOTATION_ARGUMENT
    • KT-64205 Analysis API: Do not import non-top-level callables by default
    • KT-63056 K2: Cannot mutate an immutable ImplicitReceiverValue on FirCodeFragment analysis
    • KT-64108 K2: KtFirSymbolDeclarationOverridesProvider shouldn't provide fake overrides
    • KT-63752 K2: java.lang.StackOverflowError FirFieldSymbol.getHasInitializer
    • KT-63718 Analysis API: Stub-based dependency symbol providers of library source sessions compute the wrong package name sets
    • KT-64225 K2: IDE K2: "FirLazyBlock should be calculated before accessing" in evaluate debuger completion
    • KT-64186 Analysis API: ContextCollector provides incorrect scopes for anonymous objects
    • KT-63979 K2 IDE: presentation of types in completion is too verbose
    • KT-63681 K2: LL FIR: Improve isResolved check coverage of after lazy resolution
    • KT-62982 K2: Cannot get a PSI element for 'Enum.values'
    • KT-59732 FirLazyResolveContractViolationException: lazyResolveToPhase(IMPORTS) cannot be called from a transformer with a phase IMPORTS from serialisation plugin
    • KT-62676 K2 IDE: Reference shortener does not recoginize redundant this references
    • KT-63627 K2 IDE: shorten reference shortens required qualifier
    • KT-62675 K2 IDE: Reference shortener does not recoginize redundant labels
    • KT-60957 K2: Analysis API: Reference shortener does not work correctly with invoke function calls on properties
    • KT-63771 fe10: KtNamedClassOrObjectSymbol#isInline does not cover value classes
    • KT-60327 K2 IDE. "IllegalArgumentException: source must not be null" during delegation declaration
    • KT-62421 K2: IDE K2: "lazyResolveToPhase(BODY_RESOLVE) cannot be called from a transformer with a phase BODY_RESOLVE."
    • KT-62587 K2 IDE. FP unresolved reference on accessing nested class in annotation argument
    • KT-63700 K2: "FirLazyExpression should be calculated before accessing" in the case of secondary constructor
    • KT-61383 K2: 'KtCompilerFacility' fails on code fragment compilation in library sources with duplicated dependencies
    • KT-62111 K2 IDE. IllegalArgumentException on for loop with iterator declaration attempt
    • KT-63538 Analysis API: Removing a contract statement via PsiElement.delete() does not trigger an out-of-block modification
    • KT-63694 K1/K2 IDE. "RuntimeException: Broken stub format, most likely version of kotlin.FILE (kotlin.FILE) was not updated after serialization changes" exception on incorrect class name
    • KT-63660 K2: expect-actual gutter icons must be shown when declarations are matched but incompatible
    • KT-63560 Analysis API: Modifiable PSI tests cannot rely on the cached application environment to allow write access
    • KT-62980 Implement KtFirSimpleNameReference#getImportAlias
    • KT-63130 Analysis API: No receiver found for broken code during commit document
    • KT-62705 K2: "lazyResolveToPhase(IMPORTS) cannot be called..." from light classes
    • KT-60170 K2 IDE: CCE from KtFirCallResolver on invalid code with wrong implicit invoke
    • KT-61783 K2: Analyze 'KtCodeFragment' in a separate session
    • KT-62010 K2: IDE K2: "ConeClassLikeTypeImpl is not resolved to symbol for on-error type"
    • KT-62957 Analysis API: NullPointerException on call resolution when builtins are not available
    • KT-61252 K2: IDE K2: "By now the annotations argument mapping should have been resolved"
    • KT-62935 Analysis API: kotlin.Cloneable should not be available in Kotlin/Native sources
    • KT-62910 Analysis API: create AbstractFirPsiNativeDiagnosticsTest for LL FIR
    • KT-63096 K2: Analysis API: KotlinAnnotationsResolver for IDE is created with incorrect scope
    • KT-62310 K2 IDE. False positives errors with external annotations
    • KT-63282 K2 Script: annotation arguments phase should resolve propagated annotations
    • KT-62397 K2 IDE. FP Error in the editor on RequiresOptIn annotation from the lib despite the warning level
    • KT-63223 Analysis API: reference to declarations with kotlin* package are not resolved
    • KT-62626 IllegalStateException: Cannot build symbol for class org.jetbrains.kotlin.psi.KtScriptInitializer
    • KT-62693 K2: IDE K2: "PSI should present for declaration built by Kotlin code"
    • KT-62674 K2: "Scope for type ConeClassLikeTypeImpl" is null from transitive dependencies
    • KT-61889 Analysis API: Migrate KtFirReferenceShortener to ContextCollector instead of FirResolveContextCollector
    • KT-62772 Analysis API: No 'org.jetbrains.kotlin.fir.java.FirSyntheticPropertiesStorage'(31) in array owner: LLFirSourcesSession when analysing builtins in a context of common code
    • KT-60319 K2 IDE: "Stability for initialized variable always should be computable"
    • KT-62859 K2 IDE: "Evaluate expression" throws exception when calling "Any?.toString()"
    • KT-63058 K2 IDE: Code completion unexpectedly imports static/companion object method
    • KT-62588 getExpectedType should not calculate type of the expression
    • KT-61990 K2: Unexpected returnTypeRef for FirSyntheticProperty
    • KT-62625 K2: 'FirLazyExpression should be calculated before accessing' for unresolved super type
    • KT-62691 K2: optimize getFirForNonKtFileElement for references inside 'where'
    • KT-62834 K2: missing file node level in control flow builder
    • KT-62768 Analysis API: No 'org.jetbrains.kotlin.fir.scopes.impl.FirDelegatedMembersFilter'(44) in array owner: LLFirSourcesSession exception on analysing common code
    • KT-62874 K2: FirLazyExpression should be calculated before accessing
    • KT-62407 Analysis API: resolve [this] in KDoc to extension receiver
    • KT-61204 K2: "FirLazyExpression should be calculated before accessing in ktor HttpBinApplication"
    • KT-61901 Analysis API: Declared member scopes for Java classes are missing static members
    • KT-61800 Analysis API: Provide separate declared member scopes for non-static and static callables
    • KT-61255 Analysis API: Get rid of valueOf, values and entries from a declared member scope
    • KT-62466 Expected type for functional expression should include inferred types
    • KT-61203 IDE K2: "Expected FirResolvedArgumentList for FirAnnotationCallImpl of FirRegularClassImpl(Source) but FirArgumentListImpl found"
    • KT-61791 Analysis API: Implement combined getPackage for combined Kotlin symbol providers
    • KT-62437 K2 IDE. Resolution does not work inside lambda expression in constructor argument in supertypes
    • KT-62244 K2: Analysis API Standalone: Resolving klib dependencies from binary roots terminates application
    • KT-62897 K2 IDE. Unresolved declarations from libraries which are doubled in intellij project libraries
    • KT-61615 K2: No 'org.jetbrains.kotlin.fir.analysis.js.checkers.FirJsModuleKind' in array owner: LLFirSourcesSession
    • KT-59334 K2: LLFirImplicitTypesLazyResolver problems
    • KT-62038 K2: Nested classes are missing in symbol light class structure tests for libraries
    • KT-61788 Analysis API: Symbol for FirAnonymousInitializer cannot be null
    • KT-62139 Analysis API: KtFe10AnalysisSession.createContextDependentCopy does not need validity check
    • KT-62090 Analysis API: introduce an API to get a substitution formed by class inheritance
    • KT-62268 K2 IDE. No autocompletion and IllegalStateException for Pair
    • KT-60325 K2 IDE. "IllegalArgumentException: source must not be null" on throw usage attempt
    • KT-61431 K2: KtPropertyAccessorSymbolPointer pointer already disposed for $$result script property
    • KT-58490 K2: LLFirTypeLazyResolver problems
    • KT-58494 K2: LLFirAnnotationArgumentsLazyResolver problems
    • KT-58492 K2: LLFirBodyLazyResolver problems
    • KT-58769 K2: LL FIR: implement platform-dependent session factories
    • KT-60343 K2 IDE. IllegalArgumentException on passing incorrect type parameter to function
    • KT-61842 K2: reduce number of "in-block modification" events
    • KT-62012 K2: "KtReadActionConfinementLifetimeToken is inaccessible: Called outside analyse method"
    • KT-61371 K2: Analysis API standalone: register compiler symbol provider for libraries in standalone mode
    • KT-60611 K2: reduce number of "in-block modification" events
    • KT-61425 Analysis API: Provide a way to get a declared member scope for an enum entry's initializing anonymous object
    • KT-61405 Analysis API: An enum entry should not be a KtSymbolWithMembers
    • KT-55504 AA: remove dependency on :compiler:cli from standalone AA
    • KT-60904 K2: IDE K2: "For DESTRUCTURING_DECLARATION_ENTRY with text _, one of element types expected, but FirValueParameterSymbol found"
    • KT-61260 K2 Scripts: Containing function should be not null for KtParameter
    • KT-61568 FIR Analysis API: collectCallCandidates gives presence to the top level functions in the presence of more suitable overrides
    • KT-60610 K2 IDE: move "out of block" processing logic into LL FIR
    • KT-61597 Analysis API: KotlinIllegalStateExceptionWithAttachments: expected as maximum one expect for the actual on errorneous code with multiple expects
    • KT-59793 K2: class org.jetbrains.kotlin.fir.declarations.impl.FirErrorImportImpl cannot be cast to class org.jetbrains.kotlin.fir.declarations.FirResolvedImport
    • KT-61599 K2: ContextCollector: Support smart cast collection
    • KT-61689 Analysis API: ContextCollector provides incorrect context in scripts
    • KT-61683 Analysis API: resolve ambiguities in kotlin project
    • KT-61245 Analysis API: ContextCollector provides incorrect context for supertype constructor calls
    • KT-60384 K2: Opening @JvmName source in IDEA: NPE at PsiRawFirBuilder$Visitor.toFirConstructor()
    • KT-60918 K2 IDE: "FirDeclaration was not found for class org.jetbrains.kotlin.psi.KtDestructuringDeclarationEntry, fir is null"
    • KT-61013 K2 Scripts: LLFirReturnTypeCalculatorWithJump: No designation of local declaration
    • KT-59517 K2 IDE: KotlinExceptionWithAttachments: Modules are inconsistent
    • KT-61331 K2: add cache restoring in case of existing context
    • KT-61408 K2: IDE K2: "Inconsistency in the cache. Someone without context put a null value in the cache"

    Analysis. Light Classes

    Performance Improvements

    • KT-63486 SLC: a lot of RAM is allocated in org.jetbrains.kotlin.asJava.LightClassUtil.isMangled

    Fixes

    • KT-66692 SLC: findAttributeValue for attribute w/ default value in Java returns null
    • KT-61734 SLC: wildcard suppression not honored
    • KT-65112 Symbol Light Classes don't support annotations on type parameters
    • KT-65843 K2: Light method returns kotlin.Unit type for TestResult return type
    • KT-65653 SLC: wrong binary resolution to function with value class
    • KT-65393 SLC: missing deprecated-hidden property
    • KT-64772 SLC: presence of source PSI for compiler-generated declaration
    • KT-65425 K2 IDE: Seeing a reference to the class generated by compiler plugin exposed from Java code caused NPE from light classes
    • KT-64937 SLC: internal setters are not mangled
    • KT-63949 K2 IDE. Analyze hang on @Autowired constructor analysis
    • KT-63087 K2 IDE: in .java source reference to JvmName names on unsigned type / value class are unresolved
    • KT-64605 K2 IDE: usage of @Repeatable annotation in Java: false positive "Duplicate annotation"
    • KT-64795 SLC: distinguish last v.s. non-last vararg value parameter type during binary resolution
    • KT-61605 K2 IDE: Light elements do not obey platform contracts
    • KT-57536 SLC: no need to populate members with expect modifier
    • KT-64320 Decouple kotlin psi from java PSI
    • KT-64282 Decouple KotlinIconProviderService from java PSI
    • KT-63552 Symbol Light Classes don't support arrayOf and similar without parameters in property initializers and default parameter values

    Apple Ecosystem

    • KT-63821 Copy framework to BUILT_PRODUCTS_DIR in the embedAndSign task
    • KT-67892 KotlinNativeLink task instantiates with a fixed list of apiFiles
    • KT-64096 Diagnostic when embedAndSign used for framework with cocoapods-dependencies
    • KT-66446 Diagnostic never showed, and build fails when CocoaPods dependency is used with embedAndSign task and linking type is dynamic
    • KT-66445 Diagnostic never showed when CocoaPods dependency is used with embedAndSign task and linking type is static
    • KT-62373 "Xcode higher than tested" diagnostic
    • KT-63212 podInstall task fails without a proper diagnostic when xcodeproj gem is outdated

    Backend. Native. Debug

    • KT-65553 K2: Native: kt42208WithPassingLambdaToAnotherFunction test fails with K2
    • KT-57365 [Native] Incorrect debug info on inline function call site

    Backend. Wasm

    New Features

    • KT-65009 Generate TypeScript definitions for the @JsExport declarations in K/Wasm
    • KT-58088 [PL] Support & enable partial linkage for Wasm
    • KT-66327 Include information about particular Wasm target into KLib manifest

    Fixes

    • KT-66465 WASM support doesn't appear to be able to see some common declarations
    • KT-66905 K/Wasm: support new version of exception handling proposal
    • KT-66515 Wasm: "call param types must match" during the build
    • KT-67435 K/Wasm: import.meta.url transforming into absolute local path in webpack
    • KT-65777 Implement named export for Kotlin/Wasm
    • KT-65660 [WasmJs] Support catching JS exceptions
    • KT-65824 Wasm: Allow unsigned primitives to be used inside functions annotated with @JsExport
    • KT-66103 Wasm: companion object is not initialized in test initializers1.kt
    • KT-66471 Null method reference with Kotlin/Wasm on 2.0.0-Beta4
    • KT-65210 K/Wasm ::class operator produces Number KClass for Short expression
    • KT-66065 [Wasm] Make specialisations for closured primitive values
    • KT-64890 K/Wasm compiler crash with external class and Kodein
    • KT-66104 Wasm: compiler crash: NoSuchElementException: Sequence contains no element matching the predicate
    • KT-65778 Create the same TypeScript tests infrastructure for Kotlin/Wasm that we have now for Kotlin/JS
    • KT-65411 Kotlin/Wasm: Boolean boxed instances are not the same
    • KT-65713 Kotlin/Wasm generates a wrapper that cannot run in Deno
    • KT-63939 Kotlin/Wasm Support lazy associated object initialisation
    • KT-61888 [Kotlin/wasm] in kotlin.test support for @AfterTest for async tests
    • KT-64803 K/Wasm: non-capturing lambdas are not singleton unlike same lambdas in jvm
    • KT-64449 K2: Implement K1WasmWasiCodegenBoxTestGenerated for K2
    • KT-64829 K/Wasm: division remainder has a wrong sign
    • KT-58852 WASM: two methods with different varargs: Class korlibs.template.dynamic.DynamicShape has 2 methods with the same signature [register(kotlin.Array<T of kotlin.Array>)
    • KT-61263 K/Wasm: add a way to turn on k2 in wasm examples using Compose
    • KT-62863 Execution failed for task ':kotlinx-serialization-properties:wasmJsD8Test' in serialization in the K2 QG
    • KT-62657 K/Wasm: switch to json repots for Kotlin Wasm Benchmarks
    • KT-62147 [Kotlin/Wasm] Nothing typed when expression cause a backend error
    • KT-61958 Update SpiderMonkey and return its usage in box tests when they switch to the final opcodes for GC and FTR proposals
    • KT-60828 K/Wasm: return br_on_cast_fail usages
    • KT-59084 WASM: "RuntimeError: illegal cast" caused by inline class and JsAny
    • KT-60700 [WASM] test FirWasmCodegenBoxTestGenerated.testSuspendUnitConversion failed after KT-60259

    Compiler

    New Features

    • KT-45375 Generate all Kotlin lambdas via invokedynamic + LambdaMetafactory by default
    • KT-24664 No smartcast on stable property if receiver had non-null assertion
    • KT-23915 Add smart cast to non-nullable type after elvis operator
    • KT-61077 Support provideDelegate inference from var property type
    • KT-59688 K2: consider removing smartcasts only from the only visibile property with specific name, not from all of them
    • KT-7389 Intersection type for type parameter with multiple upper bounds in star projection
    • KT-63477 Consider supporting builder-style type inference from Unit coercion of last statements in lambdas
    • KT-61907 K2: builder inference works with assignments to member properties
    • KT-61909 K2: builder inference infers correct types from assignments to extension properties
    • KT-59551 K2: builder inference works with anonymous functions if builder parameter has a receiver with a postponed type variable
    • KT-65443 [K/N] Implement header caches
    • KT-4113 Smart casts for properties to not-null functional types at invoke calls
    • KT-65681 K2: Improve error message of UPPER_BOUND_VIOLATED when upper bound is a captured type or other non-denotable type
    • KT-32754 Choose existing extensions over additional built-ins members from JDK except overrides
    • KT-57800 Support synthetic properties on super receiver
    • KT-64350 K2: deprecate using typealias as a callable qualifier in imports
    • KT-26565 Choose existing extensions over additional built-ins members from JDK
    • KT-65478 JVM: Change inlined variable naming format
    • KT-64702 Upper bound of type parameter is ignored when capturing of in-projection appears in out position
    • KT-60274 K2: builder inference works through a delegated local variable inside builder argument
    • KT-65859 Calls refinement extension point
    • KT-15220 Reuse resolution results of common code for platform modules in multiplatform projects
    • KT-60476 K2: False positive NO_VALUE_FOR_PARAMETER in platform code for value class with default parameter in common declaration
    • KT-65153 K/N: extract liveness analysis to a separate phase
    • KT-59098 Support -Xjdk-release=1.6/1.7 with -jvm-target 1.8
    • KT-63670 Implement platform specific declaration clash diagnostics across all backends
    • KT-62547 Introduce a language feature flag for smartcasts based on "memory" variables
    • KT-60820 K1: Empty vararg value is inserted in serialized annotation call with expect default vararg value
    • KT-58172 Forbid expect class A actual constructor
    • KT-54443 Smart cast to non-null after safe-call in require
    • KT-25747 DFA variables: propagate smart cast results from local variables
    • KT-22997 Smart-cast should merge is-check for non-nullable type and a null check to a nullable type
    • KT-22996 Smart casts should observe nullability after is-check with a nullable subject type
    • KT-22004 Allow to resolve CONFLICTING_OVERLOADS with Deprecated(HIDDEN)
    • KT-61955 Support more wider actual member visibility, if the expect member is effectively final
    • KT-59504 K2 compiler does not require resolved 'componentX' functions for the placeholder ('_') variables in the destructuring declarations
    • KT-62239 Allow enum entries without parentheses uniformly
    • KT-11712 Smart cast is not applied for invisible setter

    Performance Improvements

    • KT-47545 NI: Slow type inference involving large when-expression (ConstraintInjector.processConstraints)
    • KT-62714 Do not add nullability annotations to the methods of inner classes in enum entries
    • KT-62903 Unoptimzied when compilation
    • KT-67388 FP intellij: performance degradation in build 611
    • KT-67507 K2: Slow compilation times when a class has a lot of possibly conflicting declarations
    • KT-65005 K2: Investigate testCommonSuperTypeContravariant performance
    • KT-65996 Compiler enters endless loop
    • KT-66341 K2: Don't build IdSignatures in FIR2IR with IR f/o builder
    • KT-66172 K2: Improve memory consumption of KtPsiSourceElement
    • KT-50860 Combination of array set convention and plusAssign works exponentially
    • KT-62798 'in' range checks are not intrinsified in kotlin-stdlib
    • KT-65579 K2: performance regression in FP Space
    • KT-61635 K2: getConstructorKeyword call in PsiRawFirBuilder.toFirConstructor forces AST load
    • KT-62619 FIR: Checker performance regression due to MISSING_DEPENDENCY checkers
    • KT-62044 Do not add nullability annotations to the methods of anonymous class
    • KT-62706 Optimize KtSourceElement.findChild()
    • KT-62513 Do not add nullability annotations to the methods of local classes
    • KT-61991 K2: avoid redundant full body resolution for properties during implicit type phase
    • KT-61604 [K/N] Bitcode dependency linking is slow for large compilations
    • KT-61121 [K/N] Kotlin Native compiler performance is slow when generating large frameworks
    • KT-57616 K2: Consider optimizing reversed versions of persistent lists in FirTowerDataContext

    Fixes

    • KT-67993 K2: PCLA Inference throws exception with local objects
    • KT-61768 Wrong bytecode index in LineNumberTable when there is an incremental operation
    • KT-63580 "AssertionError: access of const val: GET_FIELD" caused by const value and variable with delegation
    • KT-63567 "NoSuchMethodError" on getting value of lazily initialized property by companion's const value
    • KT-56078 K2: build kotlinx.coroutines
    • KT-67609 K2: False negative INFERRED_TYPE_VARIABLE_INTO_EMPTY_INTERSECTION_ERROR
    • KT-57750 Report ambiguity error when resolving types and having the same-named classes star imported
    • KT-65603 K2: No approximation is done on public, but effectively private property
    • KT-59932 K2: Disappeared AMBIGUOUS_ANONYMOUS_TYPE_INFERRED
    • KT-59906 K2: Disappeared CAPTURED_VAL_INITIALIZATION
    • KT-53886 NoSuchMethodError exception in Kotlin/Native compiler
    • KT-57678 K2: Inconsistency in how K2 analyzes unresolved code for loops and changing closures
    • KT-57871 K1/K2 inconsistency on if-conditional without else-branch in parenthesis
    • KT-56384 K2: build IntelliJ monorepo master branch
    • KT-49191 Leaked integer literals from lambda with flexible return type
    • KT-65812 K2: "OutOfMemoryError: Java heap space" in kotlin.utils.SmartList.add
    • KT-67224 K2/Native: Member overrides different '@Throws' filter from separate module
    • KT-65623 K2: Unresolved reference in connection with casts
    • KT-64136 K2: NSME with Anvil compiler plugin
    • KT-51241 Provide a error when override method has different set of context receivers
    • KT-52920 Confusing "Multiple arguments applicable for context receiver" error message
    • KT-67912 K2: Cannot inference type properly from inline function with Type parameter
    • KT-68056 Prohibit referencing java field in case of conflict with property from companion object of the derived class
    • KT-61129 K2: Implement error suppression warning
    • KT-67367 K2: Incorrect resolution to top-level function with less specific signature in presence of SAM constructor on the same tower level
    • KT-50179 Fix DUPLICATE_LABEL_IN_WHEN warning with new rules of complex boolean constants
    • KT-45334 Prohibit referencing constructors of sealed classes by its inner members
    • KT-59943 K2: Disappeared OPERATOR_MODIFIER_REQUIRED
    • KT-67875 K2: Resolution ambiguity between Iterable and varargs
    • KT-67699 Not enough information to infer type argument for 'Error' using Arrow's Raise context receiver since Kotlin 2.0.0-Beta3
    • KT-67486 K2: Calling method from a Java (implementing a Kotlin class) with named parameters is no longer possible if Java method has different parameter names
    • KT-66527 K2: type mismatch on override for <anonymous> type
    • KT-59897 K2: Disappeared PACKAGE_OR_CLASSIFIER_REDECLARATION
    • KT-50020 K2: False-negative USAGE_IS_NOT_INLINEABLE when lambda in receiver position
    • KT-44557 Implement main function detection to FIR
    • KT-67810 K2: public-API inline function cannot access non-public-API annotation enum
    • KT-66447 Implement KT-59138 under a language feature
    • KT-54862 Anonymous type can be exposed from private inline function from type argument
    • KT-37592 Property invoke of a functional type with receiver is preferred over extension function invoke
    • KT-51194 False negative CONFLICTING_INHERITED_MEMBERS when dependency class contained in two different versions of the same dependency
    • KT-67221 K2: "new inference error [NewConstraintError at Incorporate TypeVariable" for captured type
    • KT-66701 K2: Java interface method override via Kotlin class rejected
    • KT-60604 K2: introduced NON_PUBLIC_CALL_FROM_PUBLIC_INLINE, @PublishedApi needed for constants in annotations
    • KT-64309 Generate a variable mapping for continuation parameter in suspend methods just from the start
    • KT-65438 K2: Introduce WEAKLY_HIDDEN concept to built-in-JDK content mapping
    • KT-65235 JDK 21 might lead to change in overloads resolution
    • KT-66768 K1: False positive UNRESOLVED_REFERENCE in super.getFirst/getLast call
    • KT-67106 Platforms libs-dependant autotests for ObjC checkers
    • KT-65440 K2: Mark all potential implementations of List.getFirst()/getLast() as deprecated independently of JDK
    • KT-65594 K2: Type inference fails on NullMarked object with star type
    • KT-62849 Unoptimised bytecode for Java synthetic property references
    • KT-60174 JVM IR inline: accidental reification in various cases
    • KT-57609 K2: Stop relying on the presence of @UnsafeVariance using for contravariant parameters
    • KT-54316 Out-of-call reference to companion object's member has invalid signature
    • KT-66976 Some value class diagnostics are missed
    • KT-57426 Incorrect error message on inapplicable smartcast from alien property
    • KT-55111 OptIn: forbid constructor calls with default arguments under marker
    • KT-49856 Incorrect smartcast on var assigned in try-catch block
    • KT-41237 ReturnsImplies contract for receiver of member function does not work (no smartcast)
    • KT-37878 No Smart cast for class literal reference of nullable generic type
    • KT-35846 Smart cast with unchecked cast leads to unresolved call that was resolved before (both old and new inference)
    • KT-30867 Unsound smartcast if smartcast source and break is placed in for-in header as function arguments
    • KT-30267 Inconsistent smart casts in while (true)
    • KT-33917 Prohibit to expose anonymous types from private inline functions
    • KT-28889 Smart cast does not work with boolean and infix function
    • KT-54790 False positive NO_ELSE_IN_WHEN when all interfaces are sealed
    • KT-54920 K2: when with a single branch stops being exhaustive the second time it's done
    • KT-53364 False positive UNUSED_VARIABLE warning for variable that is used across multiple blocks
    • KT-43234 False positive INVALID_IF_AS_EXPRESSION caused by if without else inside else inside synchronized()
    • KT-38490 False negative INVALID_IF_AS_EXPRESSION with unreachable code and coercion to Unit
    • KT-35510 No INVALID_IF_AS_EXPRESSION ("'if' must have both main and 'else' branches if used as an expression") diagnostic for if-expression with only one branch and Nothing type condition
    • KT-34016 Contracts - variable cannot be initialized before declaration
    • KT-56408 Inconsistent rules of CFA in class initialization block between K1 and K2
    • KT-33829 False positive SENSELESS_COMPARISON with assignment in catch block
    • KT-30717 False positive UNUSED_VARIABLE with local var used in inline lambda block with loop, return and other lambda
    • KT-28232 RETURN_NOT_ALLOWED in inline lambda argument of '[... ]' operator convention
    • KT-26116 No error when class member val is referenced in inline function before it is assigned later on
    • KT-25311 Calls on error type values lead to false-positive unreachable code
    • KT-24372 Misleading warning on unused setter parameter in some cases
    • KT-23680 False positive UNREACHABLE_CODE on throw with a return inside finally clause
    • KT-23502 When exhaustiveness is not checked for unreachable code, resulting in JVM back-end error
    • KT-22621 "throw throw Exception()": False negative UNREACHABLE_CODE warning
    • KT-22317 No INITIALIZATION_BEFORE_DECLARATION without primary constructor
    • KT-67307 K2: "Cannot find cached type parameter by FIR symbol" in JpaRepository.saveAll
    • KT-67185 K2: Incorrect coercion-to-Unit leading to CCE at runtime
    • KT-64891 K2: consider supporting/forbidding foo.(bar)() syntax
    • KT-59480 K2: build moko-resources
    • KT-65771 K2: "IndexOutOfBoundsException: Cannot pop operand off an empty stack" when calling method imported using typealias as callable qualifier
    • KT-67502 K2: "property must be initialized or be abstract" with try-finally in secondary constructor
    • KT-67456 K2: "property must be initialized or be abstract" depending on constructor declaration order
    • KT-63524 K2: "Not enough information to infer type argument"
    • KT-67628 K2: "IllegalArgumentException: Expected nullable type" — alias of nullable type analyzed as non-nullable in type parameter
    • KT-67625 K2: Array aliases can't be used as vararg values
    • KT-67624 K2: False negative "The feature "break continue in inline lambdas" is experimental and should be enabled explicitly" in elvis operator
    • KT-61787 K2 doesn't report warnings for some Gradle tasks
    • KT-62550 K2: Different JVM signature of lambda with Unit return type
    • KT-65120 K2 Consider turn into platform checkers ones which checks for objC
    • KT-60271 K2: origins are not set on compare operators
    • KT-28695 Compiler does not detect uninitialized property in lambda
    • KT-67593 K2: false negative SUPER_CALL_WITH_DEFAULT_PARAMETERS
    • KT-67484 K2: FIR2IR generates incorrect access to f/o of lateinit internal var
    • KT-47382 JVM / IR: "AssertionError: Unbound private symbol IrFieldSymbolImpl" caused by string template in constructor and extension property
    • KT-67581 K2: Compiler fails on actualizing abstract class with sealed Java class via type alias
    • KT-49404 Fix type unsoundness for contravariant captured type based on Java class
    • KT-22379 Condition of while-loop with break can produce unsound smartcast
    • KT-67021 K2: Cannot find cached type parameter by FIR symbol: E of the owner: FirRegularClassSymbol Function
    • KT-67014 K1/K2 handle when expression as annotation target differently
    • KT-67254 K1/K2 both allow annotations on loops, assignments, array sets
    • KT-66960 K2. KMP. False negative 'when' expression must be exhaustive without sealed class inheritor from common source-set
    • KT-65578 K2: implement a deprecation warning for KT-57014 (wrong nullability returned from JDK SAM constructor lambda)
    • KT-63466 @NonNull on a type-variable usage doesn't take precedence over a wildcard type argument
    • KT-56134 K2: NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER diagnostic is reported for the wrong symbol
    • KT-66196 Convert INFERRED_TYPE_VARIABLE_INTO_EMPTY_INTERSECTION_ERROR to warning
    • KT-66793 K2: "assigning single elements to varargs in named form is prohibited." caused by varargs supplied from java with elvis operator
    • KT-59872 K2: Disappeared TYPE_MISMATCH
    • KT-67192 K2: Disappeared TYPE_MISMATCH [3]
    • KT-63319 K1/K2: inconsistent behavior around NullMarked and type parameter based types
    • KT-59882 K2: Disappeared CANNOT_INFER_PARAMETER_TYPE
    • KT-67191 K2: Disappeared TYPE_MISMATCH [4]
    • KT-53752 Missed subtyping check for an intersection type
    • KT-52628 Deprecate SAM constructor usages which require OptIn without annotation
    • KT-54066 Deprecate upper bound violation in typealias constructors
    • KT-64860 K2: Consider using different ConstraintPosition when fixing variables for PCLA
    • KT-67189 K2: Disappeared TYPE_MISMATCH [5]
    • KT-67551 K2: No wrong annotation target error for for statement
    • KT-67374 K2: Object is not smartcasted to type parameter type
    • KT-67264 K2: "argument type mismatch" with suspend lambda and java wildcard
    • KT-63257 K2: FIR2IR inserts incorrect implicit cast for smartcasted variable
    • KT-66902 K2: "Named arguments are prohibited for non-Kotlin functions" with Java interop
    • KT-67311 K2: "Argument type mismatch" caused by lambda type when using named arguments
    • KT-57011 Make real type of a destructuring variable consistent with explicit type when specified
    • KT-62043 K2: Fix FirCompileKotlinAgainstCustomBinariesTest.testRawTypes
    • KT-66256 K2: compiler FIR2IR crash on SAM-conversion to value parameter of in-projected type
    • KT-67124 "Unstable inference behaviour with multiple generic lambdas" compilation error
    • KT-59791 K2: Implement partially constrained lambda analysis
    • KT-66743 Lambda receivers and anonymous function parameters of inaccessible types are allowed
    • KT-67315 K2: Some default imports are not excluded
    • KT-56126 Avoid using descriptors at JvmPlatformAnalyzerServices::computePlatformSpecificDefaultImports
    • KT-66513 K2: Suppressing OPT_IN_USAGE_ERROR is now a warning in K2, preventing safe code gen compatible with -Werror
    • KT-67233 False negative UNSAFE_CALL with type check after null coalescing with 'OR'
    • KT-52802 Report ambiguity resolving between property/field and enum entry
    • KT-64920 Json.encodeToString yields different results depending on whether typealias is used
    • KT-58260 Make invoke convention work consistently with expected desugaring
    • KT-67314 PCLA works inconsistently with smart-cast related CS forks
    • KT-66797 K2 JS: Primary constructor property annotation with target VALUE_PARAMETER is put on property instead of parameter
    • KT-55179 False negative PRIVATE_CLASS_MEMBER_FROM_INLINE on calling private class companion object member from internal inline function
    • KT-54663 Projected types don't take into account in-place not null types
    • KT-58191 K2: capturing closures successors that are already resolved (thanks to backward edges) must be taken into account for allowing smart casts
    • KT-67144 K2: potential NPE when assigning to unstable vars
    • KT-66971 K2: missing SMARTCAST_IMPOSSIBLE on open val declared in another module
    • KT-66904 K2: possible NPE when reassigning captured variables
    • KT-57031 operator assignment, increment/decrement should be considered as variable reassigning in terms of DFA. green in K1 -> red in K2 for unsound code
    • KT-67212 K2: "Failed to find functional supertype for class org.jetbrains.kotlin.fir.types.ConeCapturedType"
    • KT-67283 K2: No SAM conversion for fun interface with abstract toString
    • KT-67318 Compiler fails with OutOfMemoryError on combination of PCLA+smart cast
    • KT-66956 K2: false negative CONST_VAL_WITH_NON_CONST_INITIALIZER for inc/dec operators
    • KT-64233 K2: K1/K2: ensure JVM ABI consistency for quality gates projects
    • KT-63535 K2: Apply DFA implications for nullable Nothing to both sides
    • KT-63413 K2 / kotlinx-atomicfu: "IllegalStateException: Expected some types"
    • KT-62931 K2: extra class files for @OptionalExpectation marked annotations
    • KT-34307 Confusing error message on lambda return type mismatch
    • KT-62151 K2. overload resolution ambiguity for calls of Java record compact constructors
    • KT-60732 K2 Scripting: TeamCity DSL test
    • KT-65062 K2: build kotlinx.collections.immutable and pass to CI
    • KT-59467 K2: build toolbox-enterprise
    • KT-67205 K2: can't deserialize annotation with local class as argument
    • KT-52175 K2: WRONG_ANNOTATION_TARGET for annotation that used inside if
    • KT-65449 K2: build KAPT user project and pass it to CI
    • KT-61384 IrFakeOverrideBuilder incorrectly checks visibility for friend modules
    • KT-67142 K2: IrFakeOverrideBuilder: AbstractMethodError on raw type argument in a Java superclass
    • KT-65105 K2 / Native: Member overrides different '@Throws' filter
    • KT-62570 IncompatibleClassChangeError due to overriding final method
    • KT-57812 K2: support serialization of type annotation's arguments
    • KT-67190 K2: Disappeared TYPE_MISMATCH [2]
    • KT-56683 K2: No control flow analysis for top-level properties
    • KT-67188 K2: Disappeared TYPE_MISMATCH [6]
    • KT-62063 K2: drop pre-release flag in 2.0-RC
    • KT-67187 K2: Disappeared TYPE_MISMATCH [1]
    • KT-66909 K2: Implement a diagnostic for returning null from a lambda with expected return type Unit!
    • KT-66534 False positive ASSIGNMENT_TYPE_MISMATCH in lambdas with expected return type Unit!
    • KT-63381 IrFakeOverrideBuilder: PublishedApi affects overridability of internal members
    • KT-63836 K2: No deprecation error message in common metadata compilation
    • KT-57618 K2: complex deprecation messages are not printed in the error
    • KT-59856 K2: Check ConeDiagnostics that are not mapped to KtDiagnostics
    • KT-57502 K2: Smart casts should be forbidden if variable that remembers the smart cast is declared by delegation
    • KT-63967 K2: Missing getterSignature in metadata for script variables
    • KT-59372 K2: Missing SELF_CALL_IN_NESTED_OBJECT_CONSTRUCTOR_ERROR
    • KT-60526 K2: Fix the TODO in convertToIr.kt
    • KT-67090 K2: Exception from metadata compilation when compiling class with annotations from dependencies
    • KT-59479 K2: build KorGE
    • KT-64502 K2: Internal error on calling function before declaration
    • KT-62560 K2: KAPT4: annotation @ReplaceWith is missing a default value for the element 'imports'
    • KT-67027 K2: Review all use-sites of annotation arguments utilities
    • KT-65012 IR Evaluator: NoSuchFieldException when evaluating protected/private fields of superclasses
    • KT-66953 K2: toByte() call on Char leads to ClassCastException for klib backends
    • KT-60096 K2: Introduced API_NOT_AVAILABLE
    • KT-59484 K2: build trustwallet sample
    • KT-64151 K2: consider implementing FIR-level constant evaluation
    • KT-65787 K2: "KotlinIllegalArgumentExceptionWithAttachments: Expected FirResolvedTypeRef with ConeKotlinType" caused by passing lambda expression with multiple labels to function
    • KT-53629 K2: forbid multiple labels per statement
    • KT-65255 K2 / KJS: "IllegalArgumentException: Candidate is not successful, but system has no contradiction"
    • KT-65195 K2: Unexpected exception when executing dynamic array element inc/dec
    • KT-63416 K2 / Contracts: False positive "Leaked in-place lambda" warning caused by suspend lambda with callsInPlace contract
    • KT-66717 Incorrect diagnostics around intersection property overrides
    • KT-63540 Restrict the CONFLICTING_OVERLOADS + DeprecatedLevel.HIDDEN ignore to final callables
    • KT-56587 There are no warnings in some cases when Enum.entries is shadowed
    • KT-65111 K2: Java star imports don't work in KJK interdependencies
    • KT-63709 K2: Argument smartcasting impacting receiver and call resolution for implicit invoke
    • KT-63530 K2: Disable passing data flow info from in-place lambdas
    • KT-65377 K2: "Argument type mismatch" caused by approximated captured type argument of generic type
    • KT-59400 K2: Missing CANNOT_INFER_VISIBILITY
    • KT-62305 K2: Missing Fir metadata serialization support for scripts
    • KT-64534 K2: org.jetbrains.kotlin.util.FileAnalysisException: Somewhere in file
    • KT-57555 [LC] Forbid deferred initialization of open properties with backing field
    • KT-65776 [LC] K2 breaks false && ... and false || ...
    • KT-64641 K2: Change in inference of supertype of function types with receiver
    • KT-65649 K2: IR has incorrect origins for some inplace updating operators
    • KT-64295 Forbid recursive resolve in case of potential ambiguity on upper tower level
    • KT-62866 K2: Change qualifier resolution behavior when companion object is preferred against static scope
    • KT-55446 Change impact of private-to-this visibility to resolution
    • KT-64255 Forbid accessing internal setter from a derived class in another module
    • KT-64966 Forbid generic delegating constructor calls with wrong type for generic parameter
    • KT-63389 K2: WRONG_ANNOTATION_TARGET is reported on incompatible annotations of a type wrapped into ()?
    • KT-66748 K2: False-positive AMBIGUOUS_SUPER in toString
    • KT-67013 K2: ClassCastException: class FirConstructorSymbol cannot be cast to class FirNamedFunctionSymbol
    • KT-64872 K2: do-while condition able to access uninitialized variable
    • KT-66350 K2: "IllegalStateException: Unsupported compile-time value STRING_CONCATENATION" when evaluating an annotation argument string
    • KT-61798 K2 incorrectly calculates modality of property accessors
    • KT-65035 IrFakeOverrideBuilder: AbstractMethodError on inheritance from Java subclass of CharSequence with inherited implementations
    • KT-61579 K2: Inconsistent reporting UNINITIALIZED_VARIABLE for top-level properties
    • KT-66730 K2: False positive RETURN_TYPE_MISMATCH in return statement in SAM constructor
    • KT-66570 Generic wildcard upper bound inference error
    • KT-65272 K2: invoke operator applies "restricted suspending call" error differently than K1
    • KT-66148 K2. Sources of receivers updated twice because of PCLA
    • KT-62525 K2: IllegalStateException: Can't find KotlinType in IrErrorType: IrErr

    Note truncated.

    Open source →
18. 2.0.0-RC310 May 2024pre-release
    Release notes

    Changelog

    Apple Ecosystem

    • KT-67892 KotlinNativeLink task instantiates with a fixed list of apiFiles

    Compiler

    • KT-67993 K2: PCLA Inference throws exception with local objects
    • KT-67912 K2: Cannot inference type properly from inline function with Type parameter
    • KT-68056 Prohibit referencing java field in case of conflict with property from companion object of the derived class
    • KT-67609 K2: False negative INFERRED_TYPE_VARIABLE_INTO_EMPTY_INTERSECTION_ERROR
    • KT-67875 K2: Resolution ambiguity between Iterable and varargs
    • KT-67699 Not enough information to infer type argument for 'Error' using Arrow's Raise context receiver since Kotlin 2.0.0-Beta3
    • KT-59897 K2: Disappeared PACKAGE_OR_CLASSIFIER_REDECLARATION
    • KT-50020 K2: False-negative USAGE_IS_NOT_INLINEABLE when lambda in receiver position
    • KT-67810 K2: public-API inline function cannot access non-public-API annotation enum

    JavaScript

    • KT-67978 K2: Declaration of such kind (expect) cannot be exported to JavaScript

    Native

    • KT-67218 Native: nested classes in kx.serialization ProtoBuf produce empty array for release binary

    Tools. Gradle

    • KT-67746 Indicate for users they need to apply the new Kotlin Compose Gradle plugin
    • KT-67387 Enable intrinsic remember by default in compose compiler gradle plugin
    • KT-67762 Rename Kotlin Compose Compiler plugin on Gradle portal
    • KT-67778 Clarify documentation for compose metricsDestination property

    Tools. Gradle. Multiplatform

    • KT-67806 KMP import fails if android target has flavors
    • KT-67636 Gradle configuration error when use withJava()
    • KT-67042 K2: Unresolved reference 'convertRadiusToSigma'

    Tools. Scripts

    • KT-67727 Kotlin Scripting with language version 2.0 fails during IR lowering on empty scripts

    Tools. Wasm

    • KT-67785 Kotlin/Wasm: Node.JS 22 does not need experimental-wasm-gc flag anymore

    Open source →
19. 2.0.0-RC226 Apr 2024pre-release
    Release notes

    Changelog

    Backend. Wasm

    • KT-66515 Wasm: "call param types must match" during the build
    • KT-67435 K/Wasm: import.meta.url transforming into absolute local path in webpack
    • KT-66905 K/Wasm: support new version of exception handling proposal

    Compiler

    New Features

    • KT-59688 K2: consider removing smartcasts only from the only visibile property with specific name, not from all of them

    Performance Improvements

    • KT-67388 FP intellij: performance degradation in build 611
    • KT-67507 K2: Slow compilation times when a class has a lot of possibly conflicting declarations

    Fixes

    • KT-57678 K2: Inconsistency in how K2 analyzes unresolved code for loops and changing closures
    • KT-66976 Some value class diagnostics are missed
    • KT-54920 K2: when with a single branch stops being exhaustive the second time it's done
    • KT-67307 K2: "Cannot find cached type parameter by FIR symbol" in JpaRepository.saveAll
    • KT-65771 K2: "IndexOutOfBoundsException: Cannot pop operand off an empty stack" when calling method imported using typealias as callable qualifier
    • KT-67502 K2: "property must be initialized or be abstract" with try-finally in secondary constructor
    • KT-67456 K2: "property must be initialized or be abstract" depending on constructor declaration order
    • KT-67628 K2: "IllegalArgumentException: Expected nullable type" — alias of nullable type analyzed as non-nullable in type parameter
    • KT-67625 K2: Array aliases can't be used as vararg values
    • KT-67624 K2: False negative "The feature "break continue in inline lambdas" is experimental and should be enabled explicitly" in elvis operator
    • KT-60271 K2: origins are not set on compare operators
    • KT-44557 Implement main function detection to FIR
    • KT-67593 K2: false negative SUPER_CALL_WITH_DEFAULT_PARAMETERS
    • KT-67484 K2: FIR2IR generates incorrect access to f/o of lateinit internal var
    • KT-67486 K2: Calling method from a Java (implementing a Kotlin class) with named parameters is no longer possible if Java method has different parameter names
    • KT-47382 JVM / IR: "AssertionError: Unbound private symbol IrFieldSymbolImpl" caused by string template in constructor and extension property
    • KT-67581 K2: Compiler fails on actualizing abstract class with sealed Java class via type alias
    • KT-67014 K1/K2 handle when expression as annotation target differently
    • KT-67254 K1/K2 both allow annotations on loops, assignments, array sets
    • KT-67224 K2/Native: Member overrides different '@Throws' filter from separate module
    • KT-66960 K2. KMP. False negative 'when' expression must be exhaustive without sealed class inheritor from common source-set
    • KT-63466 @NonNull on a type-variable usage doesn't take precedence over a wildcard type argument
    • KT-56134 K2: NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER diagnostic is reported for the wrong symbol
    • KT-59872 K2: Disappeared TYPE_MISMATCH
    • KT-67192 K2: Disappeared TYPE_MISMATCH [3]
    • KT-67191 K2: Disappeared TYPE_MISMATCH [4]
    • KT-64860 K2: Consider using different ConstraintPosition when fixing variables for PCLA
    • KT-67189 K2: Disappeared TYPE_MISMATCH [5]
    • KT-67551 K2: No wrong annotation target error for for statement
    • KT-67367 K2: Incorrect resolution to top-level function with less specific signature in presence of SAM constructor on the same tower level
    • KT-67374 K2: Object is not smartcasted to type parameter type
    • KT-67264 K2: "argument type mismatch" with suspend lambda and java wildcard
    • KT-67221 K2: "new inference error [NewConstraintError at Incorporate TypeVariable" for captured type
    • KT-67311 K2: "Argument type mismatch" caused by lambda type when using named arguments
    • KT-62043 K2: Fix FirCompileKotlinAgainstCustomBinariesTest.testRawTypes
    • KT-66743 Lambda receivers and anonymous function parameters of inaccessible types are allowed
    • KT-67315 K2: Some default imports are not excluded
    • KT-56126 Avoid using descriptors at JvmPlatformAnalyzerServices::computePlatformSpecificDefaultImports
    • KT-66513 K2: Suppressing OPT_IN_USAGE_ERROR is now a warning in K2, preventing safe code gen compatible with -Werror
    • KT-67314 PCLA works inconsistently with smart-cast related CS forks
    • KT-67144 K2: potential NPE when assigning to unstable vars
    • KT-66971 K2: missing SMARTCAST_IMPOSSIBLE on open val declared in another module
    • KT-66904 K2: possible NPE when reassigning captured variables
    • KT-67212 K2: "Failed to find functional supertype for class org.jetbrains.kotlin.fir.types.ConeCapturedType"
    • KT-67283 K2: No SAM conversion for fun interface with abstract toString
    • KT-66768 K1: False positive UNRESOLVED_REFERENCE in super.getFirst/getLast call
    • KT-67318 Compiler fails with OutOfMemoryError on combination of PCLA+smart cast
    • KT-65812 K2: "OutOfMemoryError: Java heap space" in kotlin.utils.SmartList.add
    • KT-66956 K2: false negative CONST_VAL_WITH_NON_CONST_INITIALIZER for inc/dec operators
    • KT-67205 K2: can't deserialize annotation with local class as argument
    • KT-65449 K2: build KAPT user project and pass it to CI
    • KT-67142 K2: IrFakeOverrideBuilder: AbstractMethodError on raw type argument in a Java superclass
    • KT-62570 IncompatibleClassChangeError due to overriding final method
    • KT-67190 K2: Disappeared TYPE_MISMATCH [2]
    • KT-67188 K2: Disappeared TYPE_MISMATCH [6]
    • KT-67187 K2: Disappeared TYPE_MISMATCH [1]
    • KT-63381 IrFakeOverrideBuilder: PublishedApi affects overridability of internal members
    • KT-59856 K2: Check ConeDiagnostics that are not mapped to KtDiagnostics
    • KT-57502 K2: Smart casts should be forbidden if variable that remembers the smart cast is declared by delegation
    • KT-63967 K2: Missing getterSignature in metadata for script variables
    • KT-59372 K2: Missing SELF_CALL_IN_NESTED_OBJECT_CONSTRUCTOR_ERROR
    • KT-60526 K2: Fix the TODO in convertToIr.kt
    • KT-67027 K2: Review all use-sites of annotation arguments utilities
    • KT-66953 K2: toByte() call on Char leads to ClassCastException for klib backends
    • KT-65415 K2: Stdlib K2 build error: IrConstructorSymbolImpl is already bound

    IR. Actualizer

    • KT-67488 K2: AssertionError No such value argument slot in IrConstructorCallImpl: 0 (total=0

    JavaScript

    • KT-66922 K2 JS: Intrinsic Float/Double toString producing wrong numbers
    • KT-63038 Compilation of suspend functions into ES2015 generators
    • KT-8373 JS: support ES6 as compilation target
    • KT-64951 Kotlin-Multiplatform does not allow JSExport of expect

    Klibs

    • KT-67401 KLib ABI dump: write plain targets in the manifest

    Native. Testing

    • KT-67501 Mute flaky driver tests on macOS agents

    Tools. CLI

    • KT-67417 CLI: Remove option -Xrepeat
    • KT-65451 K2: CLI: false positive warning "scripts are not yet supported with K2 in LightTree mode" on irrelevant files in source directory

    Tools. Compiler Plugins

    • KT-67489 JsPlainObjects Plugin: Method not found when consuming
    • KT-67523 [K2] Actualizer cannot reconcile mismatched parameter names from java supertypes
    • KT-67354 K2 Parcelize: support efficient Parcel serializer for parcelables in the same module
    • KT-64454 K2: Implement ParcelizeIrBytecodeListingTestGenerated for K2
    • KT-67353 K2 Parcelize: support parcelableCreator intrinsic

    Tools. Gradle

    New Features

    • KT-67253 Support per-target configuration in compose-compiler-gradle-plugin

    Fixes

    • KT-64115 KGP + JVM/JS/WASM: The same library can be passed twice to the compiler
    • KT-64567 [FUS] Add boolean flag into kotlin.gradle.performance collector
    • KT-67685 KotlinBaseApiPlugin regression with Gradle's Configuration Cache in 2.0.0-RC1
    • KT-67515 Remove 'experimental' from compose strong skipping mode
    • KT-67441 Gradle remote cache misses in the compose plugin
    • KT-67602 Compose gradle plugin: a deprecated plugin option 'experimentalStrongSkipping' is added by default that causes a warning
    • KT-67200 Compose gradle plugin: 'suppressKotlinVersionCompatibilityCheck' option is duplicated if added as a kotlin option for the KotlinCompile task and kapt is used
    • KT-67216 Compose compiler plugin: false-positive versions incompatibility is reported
    • KT-66459 PowerAssert: Improve design of excludedSourceSets extension property
    • KT-61913 Validate LanguageSettings KDoc

    Tools. Gradle. Multiplatform

    • KT-57141 K2: KotlinCompile task input named 'multiplatformStructure.fragments.$0.sources' is tracked in a pure JVM kotlin project together with changes of sources
    • KT-65480 MissingNativeStdlibChecker checks existence of konanDistribution.stdlib during configuration phase
    • KT-67127 KMP: IDE Dependency Resolver for CInterops reports errors on linux and windows machines
    • KT-63536 KMP: MetadataDependencyTransformationTask is not Thread Safe

    Tools. Gradle. Native

    • KT-67522 K/N toolchain: unclear compilation error if path specified as a value for the kotlin.native.home doesn't provide the kotlin native compiler downloaded
    • KT-67521 K/N warning checking existence of the standard library isn't displayed when the native toolchain enabled and the kotlin native home dir doesn't contain stdlib

    Tools. Kapt

    • KT-66541 K2 KAPT: KotlinIllegalArgumentExceptionWithAttachments: Expected expression 'FirPropertyAccessExpressionImpl' to be resolved

    Tools. Scripts

    • KT-66395 K2: Scripting test testHelloSerialization fails on K2

    Tools. Wasm

    • KT-65864 K/Wasm: update Node.js to 22.x

    Open source →
20. 2.0.0-RC18 Apr 2024pre-release
    Release notes

    Changelog

    Analysis. API

    Fixes

    • KT-65616 K2: FirDeclarationStatusImpl cannot be cast to FirResolvedDeclarationStatus from STATUS
    • KT-64241 K2: Unresolved calls to functions in scripts depending on included projects
    • KT-65813 Analysis API Standalone: FirDeclarationForCompiledElementSearcher does not find compiled elements
    • KT-66052 AA: render expect/actual modifier
    • KT-66795 KtCodeFragment.clone() is broken
    • KT-66532 K2 CodeGen AA: missing annotation setup for function in source module but not in a compile target file
    • KT-65561 Analysis API: dummy.kt is not a physical file
    • KT-64833 Analysis API: Members implemented by delegation have no overridden symbols
    • KT-62405 Analysis API: Symbols SUBSTITUTION_OVERRIDE have no overridden symbols
    • KT-66749 K2: "Collection contains no element matching the predicate" on an unresolved call
    • KT-66719 AbstractGetKlibSourceFileNameTest: The dependency to ":native:analysis-api-klib-reader" breaks JPS compilation
    • KT-66603 Analysis API: support type annotations in KtPsiTypeProviderMixIn#asPsiType
    • KT-64505 Analysis API Standalone: Remove test-specific calculation of sealed class inheritors
    • KT-66013 Analysis API Standalone: Sealed inheritors aren't correctly calculated for source classes
    • KT-62880 K2 IDE: Unresolved java annotation methods in KDoc
    • KT-66530 K2: Analysis API: KtPsiTypeProvider#asKtType crashes on PsiClassType for Java type parameter with wrong use site
    • KT-66485 Substituted types are not provided for callable references
    • KT-66498 Analysis API: 'KtFe10SymbolDeclarationOverridesProvider' considers a class to be a subclass of itself
    • KT-66189 K2 / IDE: KtFirExpressionTypeProvider bugs
    • KT-59732 FirLazyResolveContractViolationException: lazyResolveToPhase(IMPORTS) cannot be called from a transformer with a phase IMPORTS from serialisation plugin

    Analysis. Light Classes

    • KT-66692 SLC: findAttributeValue for attribute w/ default value in Java returns null

    Apple Ecosystem

    • KT-66446 Diagnostic never showed, and build fails when CocoaPods dependency is used with embedAndSign task and linking type is dynamic
    • KT-66445 Diagnostic never showed when CocoaPods dependency is used with embedAndSign task and linking type is static

    Backend. Wasm

    • KT-66471 Null method reference with Kotlin/Wasm on 2.0.0-Beta4
    • KT-65210 K/Wasm ::class operator produces Number KClass for Short expression
    • KT-58088 [PL] Support & enable partial linkage for Wasm
    • KT-66104 Wasm: compiler crash: NoSuchElementException: Sequence contains no element matching the predicate
    • KT-64449 K2: Implement K1WasmWasiCodegenBoxTestGenerated for K2
    • KT-61263 K/Wasm: add a way to turn on k2 in wasm examples using Compose

    Compiler

    New Features

    • KT-32754 Choose existing extensions over additional built-ins members from JDK except overrides
    • KT-64350 K2: deprecate using typealias as a callable qualifier in imports
    • KT-62547 Introduce a language feature flag for smartcasts based on "memory" variables

    Performance Improvements

    • KT-65005 K2: Investigate testCommonSuperTypeContravariant performance
    • KT-65579 K2: performance regression in FP Space
    • KT-61121 [K/N] Kotlin Native compiler performance is slow when generating large frameworks

    Fixes

    • KT-67185 K2: Incorrect coercion-to-Unit leading to CCE at runtime
    • KT-63836 K2: No deprecation error message in common metadata compilation
    • KT-57618 K2: complex deprecation messages are not printed in the error
    • KT-61787 K2 doesn't report warnings for some Gradle tasks
    • KT-62063 K2: drop pre-release flag in 2.0-RC
    • KT-65578 K2: implement a deprecation warning for KT-57014 (wrong nullability returned from JDK SAM constructor lambda)
    • KT-65120 K2 Consider turn into platform checkers ones which checks for objC
    • KT-67090 K2: Exception from metadata compilation when compiling class with annotations from dependencies
    • KT-59479 K2: build KorGE
    • KT-62560 K2: KAPT4: annotation @ReplaceWith is missing a default value for the element 'imports'
    • KT-67027 K2: Review all use-sites of annotation arguments utilities
    • KT-60096 K2: Introduced API_NOT_AVAILABLE
    • KT-64151 K2: consider implementing FIR-level constant evaluation
    • KT-65195 K2: Unexpected exception when executing dynamic array element inc/dec
    • KT-63416 K2 / Contracts: False positive "Leaked in-place lambda" warning caused by suspend lambda with callsInPlace contract
    • KT-57812 K2: support serialization of type annotation's arguments
    • KT-66717 Incorrect diagnostics around intersection property overrides
    • KT-65603 K2: No approximation is done on public, but effectively private property
    • KT-59932 K2: Disappeared AMBIGUOUS_ANONYMOUS_TYPE_INFERRED
    • KT-66527 K2: type mismatch on override for <anonymous> type
    • KT-59400 K2: Missing CANNOT_INFER_VISIBILITY
    • KT-64534 K2: org.jetbrains.kotlin.util.FileAnalysisException: Somewhere in file
    • KT-65649 K2: IR has incorrect origins for some inplace updating operators
    • KT-66748 K2: False-positive AMBIGUOUS_SUPER in toString
    • KT-67013 K2: ClassCastException: class FirConstructorSymbol cannot be cast to class FirNamedFunctionSymbol
    • KT-52175 K2: WRONG_ANNOTATION_TARGET for annotation that used inside if
    • KT-66902 K2: "Named arguments are prohibited for non-Kotlin functions" with Java interop
    • KT-66793 K2: "assigning single elements to varargs in named form is prohibited." caused by varargs supplied from java with elvis operator
    • KT-65235 JDK 21 might lead to change in overloads resolution
    • KT-66350 K2: "IllegalStateException: Unsupported compile-time value STRING_CONCATENATION" when evaluating an annotation argument string
    • KT-65035 IrFakeOverrideBuilder: AbstractMethodError on inheritance from Java subclass of CharSequence with inherited implementations
    • KT-66447 Implement KT-59138 under a language feature
    • KT-66701 K2: Java interface method override via Kotlin class rejected
    • KT-66730 K2: False positive RETURN_TYPE_MISMATCH in return statement in SAM constructor
    • KT-66909 K2: Implement a diagnostic for returning null from a lambda with expected return type Unit!
    • KT-66570 Generic wildcard upper bound inference error
    • KT-65272 K2: invoke operator applies "restricted suspending call" error differently than K1
    • KT-65300 K2: this-expressions in initializers and local declarations don't introduce type information to either BI or PCLA
    • KT-66797 K2 JS: Primary constructor property annotation with target VALUE_PARAMETER is put on property instead of parameter
    • KT-66463 K2: false positive ACCIDENTAL_OVERRIDE_CLASH_BY_JVM_SIGNATURE
    • KT-63631 K2: constant value UByte.MAX_VALUE is incorrectly deserialized from metadata
    • KT-65386 K2: Different signature of invoke for Unit lambda
    • KT-60574 K2: generated IR for suspendCoroutineUninterceptedOrReturn is different from K1 (K2 uses Any? instead of Unit)
    • KT-66512 K2: Incorrect diagnostic in lambda whose expected type is a type alias to Unit
    • KT-66279 K2: False positive INITIALIZER_TYPE_MISMATCH with return Unit in a lambda with the expected type () -> Unit
    • KT-66277 K2: False negative RETURN_TYPE_MISMATCH with empty return in lambda assigned to a property
    • KT-62550 K2: Different JVM signature of lambda with Unit return type
    • KT-65623 K2: Unresolved reference in connection with casts
    • KT-66654 K2 FIR resolution: Mismatch between actual type and expected type for a value parameter when the parameter type is a function type with special function kind
    • KT-66638 Cannot access properties of a generic type with wildcards
    • KT-66767 K2: Destructuring declaration inside initializer failure
    • KT-65727 K2: add proper package for properties generated from destructuring declarations
    • KT-64854 K2: Trying to access private field on runtime with contracts
    • KT-59906 K2: Disappeared CAPTURED_VAL_INITIALIZATION
    • KT-65388 IrFakeOverrideBuilder - custom annotation is available in fake getter/setter
    • KT-56384 K2: build IntelliJ monorepo master branch
    • KT-66352 K2: difference between LL FIR and FIR for componentN functions
    • KT-66686 K2 Script: Unresolved reference of script-specific entities on out-of-order resolve
    • KT-65523 K2: add proper package for result$$ property
    • KT-66699 Restore HostManager ABI
    • KT-60533 Inliner incorrectly captures non-null value as null in coroutines
    • KT-57925 K2: Consider removing FirEmptyContractDescription
    • KT-61893 K2: should not resolve to Java function with Kotlin hidden-level deprecation
    • KT-59669 K2: Explore assignments in in-place lambdas
    • KT-66271 Fir: Deserialize classFile, functionFile and propertyFile from KlibMetadataProtoBuf
    • KT-57957 K2: Symbol providers are frequently queried with error-named class IDs
    • KT-66677 K2: OVERRIDE_DEPRECATION isn't reported for WEAKLY_HIDDEN method toArray()
    • KT-62793 K2: slightly different bytecode of suspend conversions
    • KT-57244 K2: slightly different naming scheme for suspend conversion adapters
    • KT-60256 K2: types are not substituted in suspend conversion
    • KT-64407 Implement WriteSignatureTestGenerated for K2
    • KT-64438 K2: Port CodegenTestCase to K2
    • KT-64404 Implement WriteFlagsTestGenerated for K2
    • KT-66491 K2 / KJS: "Name contains illegal characters." caused by backticks in import
    • KT-66275 K2: false-positive "Java module does not depend on module" error on access to inherited member from twice-transitive dependency via class from transitive dependency
    • KT-65576 K2: Incorrect resolution of variable+invoke when the property type is not computed
    • KT-58575 Private Kotlin property prevents use of Java get- and set-methods from Java-Kotlin-Java hierarchy
    • KT-65438 K2: Introduce WEAKLY_HIDDEN concept to built-in-JDK content mapping
    • KT-60510 Smartcast to functional type does not work in when exprssion
    • KT-59677 K2: Report diagnostics about missing receiver for delegated constructor call to inner class
    • KT-65939 IrFakeOverrideBuilder - nullability annotation is lost in intersection without annotation
    • KT-66356 K2: type mismatch error when generic type with inaccessible generic type as type argument is produced and consumed by declarations from dependencies
    • KT-65193 K2: "JAVA_TYPE_MISMATCH" caused by MutableList
    • KT-65704 K2: computeCommonSuperType of flexible type with recursive captured type argument produces giant multi-level-deep type
    • KT-64920 Json.encodeToString yields different results depending on whether typealias is used
    • KT-65594 K2: Type inference fails on NullMarked object with star type
    • KT-66392 K2: Exception in KJK hierarchy with implicit types
    • KT-66551 Revert temporary commits after KT-62063 and bootstrapping
    • KT-65218 FIR LL and DiagnosticFE10 tests start to fail in case of adding any new declaration into stdlib commonMain
    • KT-63746 K2: JSpecify: If a class has a @Nullable type-parameter bound, Kotlin should still treat unbounded wildcards like platform types
    • KT-66504 K2: plusAssign operator call is resolved differently than function call
    • KT-65105 K2 / Native: Member overrides different '@Throws' filter
    • KT-48515 JSpecify: If a class has a @Nullable type-parameter bound, Kotlin should still treat unbounded wildcards like platform types
    • KT-58892 K2: Parcelize doesn't work in common code when expect annotation is actualized with typealias to @Parcelize
    • KT-66124 K2: Remove FirLambdaArgumentExpression and FirNamedArgumentExpression after resolution
    • KT-38031 FIR: Discrepancy in call resolution for qualifiers with old FE
    • KT-65789 K1/K2: Resolve change in constructor/top-level function ambiguity
    • KT-66150 K2: expects type argument in super qualifier
    • KT-50008 JSpecify @Nullable annotation on type-parameter bound prevents type-variable usages from being platform types
    • KT-56988 CFG, smart casts: red in K1 -> green in K2 for invalid code
    • KT-66449 Make DiagnosticSuppressor a project-level extension
    • KT-65249 K2: False positive modality is different for native compilation
    • KT-64846 K2: false negative CONFLICTING_JVM_DECLARATIONS on inheritance from Java collection subclass with a conflicting override
    • KT-58203 K2: false-negative incompatible types error on is-check with unrelated type
    • KT-65722 K2: Property reference refers to non-existent functions
    • KT-65878 K2: "ClassCastException" when passing nun-suspend lambda to SAM constructor with named argument
    • KT-65926 K2: add tests for all fixed-in-k2 / not-reproducible-in-k2 unresolved issues
    • KT-58279 K2. False-negative Smart cast to is impossible, because is a public API property declared in different module for Java static field
    • KT-56032 [LC issue] Incorrect wrapping when passing java vararg method to inline function
    • KT-63826 K2: expect for expect crashes the compiler
    • KT-63525 K2: "IllegalStateException: Fake override should have at least one overridden descriptor" caused by unreachable code
    • KT-65333 K2: UNRESOLVED_REFERENCE for java inner class in intersection scope
    • KT-57585 K2/MPP: false-negative errors on expect/actual modifiers mismatch
    • KT-59467 K2: build toolbox-enterprise
    • KT-59883 K2: Disappeared INVALID_IF_AS_EXPRESSION
    • KT-63420 Prevent weakening visibility in implicit overrides
    • KT-56744 Prepare language committee ticket about DFA/Smart-cast related changes in K2
    • KT-64233 K2: K1/K2: ensure JVM ABI consistency for quality gates projects
    • KT-59744 K2: false negative VAL_REASSIGNMENT in case of reassignment inside custom setter
    • KT-62878 K2: missing implicit coercion to unit
    • KT-63441 IrFakeOverrideBuilder: "accidental override" when implementing a Java function taking an array parameter
    • KT-59887 K2: Disappeared ACTUAL_MISSING
    • KT-59839 Prohibit header and impl in MPP
    • KT-64967 K2: false positive TYPE_MISMATCH with generic type parameters
    • KT-59664 Inline modifier can be added to a constructor parameter, but it does not have any effect
    • KT-59630 K2: Implement running FIR Blackbox tests on different JDKs
    • KT-65058 K2: Protected function call from public-API inline function is prohibited in anonymous object
    • KT-61891 K2: POSTFIX_{INCR|DECR} of global misses an origin
    • KT-64314 K2: Rename FirConstExpression to FirLiteralExpression
    • KT-64809 K2: Remove the LINK_VIA_SIGNATURES flag from FIR2IR configuration
    • KT-59682 K2: Use proper source for vararg arguments
    • KT-59972 K2: Disappeared EXPRESSION_EXPECTED_PACKAGE_FOUND
    • KT-64405 K2: Implement CompileJavaAgainstKotlinTestGenerated for K2
    • KT-61032 K2: False positive “Unused variable” for function callable reference
    • KT-64771 Investigate subtle FIR_DUMP difference for reversed order analysis
    • KT-62584 K2: different signature in subclass of local class declared in extension value getter
    • KT-59938 K2: Disappeared AMBIGUOUS_ACTUALS
    • KT-63446 IrFakeOverrideBuilder: AbstractMethodError due to missing bridge for generic method in a Java superclass
    • KT-59949 K2: Disappeared DEPRECATED_PARCELER
    • KT-55809 K2: Support pre-release checks for klibs
    • KT-59913 K2: Disappeared UNSUPPORTED_FEATURE
    • KT-58094 K2: Review IrBuiltinsOverFir
    • KT-59940 K2: Disappeared ACTUAL_ANNOTATION_CONFLICTING_DEFAULT_ARGUMENT_VALUE
    • KT-60004 K2: Disappeared CONTRACT_NOT_ALLOWED
    • KT-59890 K2: Disappeared CONST_VAL_WITH_NON_CONST_INITIALIZER
    • KT-59884 K2: Disappeared NON_LOCAL_RETURN_NOT_ALLOWED
    • KT-59977 K2: Disappeared NO_ACTUAL_FOR_EXPECT
    • KT-59996 K2: Disappeared INVALID_CHARACTERS
    • KT-59992 K2: Disappeared KCLASS_WITH_NULLABLE_TYPE_PARAMETER_IN_SIGNATURE
    • KT-59974 K2: Disappeared INAPPLICABLE_INFIX_MODIFIER
    • KT-59991 K2: Disappeared FORBIDDEN_VARARG_PARAMETER_TYPE
    • KT-59973 K2: Disappeared INAPPLICABLE_LATEINIT_MODIFIER
    • KT-59933 K2: Disappeared USAGE_IS_NOT_INLINABLE
    • KT-59967 K2: Disappeared UNINITIALIZED_ENUM_ENTRY
    • KT-59943 K2: Disappeared OPERATOR_MODIFIER_REQUIRED
    • KT-59986 K2: Disappeared ITERATOR_MISSING
    • KT-57802 K2: Backend Internal error: RecordEnclosingMethodsLowering.kt
    • KT-59941 K2: Disappeared COMPONENT_FUNCTION_MISSING
    • KT-62620 Warn about @OptIn/@Deprecated for overrides of Any
    • KT-59689 K2: Fix complex smartcasts with safe calls
    • KT-60026 K2: Introduced EXPOSED_TYPEALIAS_EXPANDED_TYPE
    • KT-59433 K2: Missing NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE
    • KT-60080 K2: Introduced INVISIBLE_SETTER
    • KT-59979 K2: Disappeared SUPERTYPE_INITIALIZED_IN_EXPECTED_CLASS
    • KT-59978 K2: Disappeared EXPECTED_ENUM_ENTRY_WITH_BODY
    • KT-59955 K2: Disappeared INCOMPATIBLE_MODIFIERS
    • KT-59942 K2: Disappeared ANNOTATION_PARAMETER_DEFAULT_VALUE_MUST_BE_CONSTANT
    • KT-59931 K2: Disappeared CLASS_LITERAL_LHS_NOT_A_CLASS
    • KT-59429 K2: Missing ABBREVIATED_NOTHING_RETURN_TYPE
    • KT-59420 K2: Missing ABBREVIATED_NOTHING_PROPERTY_TYPE
    • KT-59965 K2: Disappeared CANNOT_ALL_UNDER_IMPORT_FROM_SINGLETON
    • KT-59952 K2: Disappeared EXPOSED_PROPERTY_TYPE_IN_CONSTRUCTOR_ERROR
    • KT-59985 K2: Disappeared UNDERSCORE_USAGE_WITHOUT_BACKTICKS
    • KT-59950 K2: Disappeared ILLEGAL_ESCAPE
    • KT-59899 K2: Disappeared EXPECTED_DECLARATION_WITH_BODY
    • KT-59980 K2: Disappeared EXPECTED_ENUM_CONSTRUCTOR
    • KT-59982 K2: Disappeared EXPECTED_CLASS_CONSTRUCTOR_PROPERTY_PARAMETER
    • KT-60092 K2: Introduced EXPOSED_PROPERTY_TYPE_IN_CONSTRUCTOR_ERROR
    • KT-60105 K2: Introduced UNDERSCORE_USAGE_WITHOUT_BACKTICKS
    • KT-57703 K1/K2: unprecise constraint system behavior around integer literals and comparable arrays
    • KT-60043 K2: Introduced PROPERTY_AS_OPERATOR
    • KT-60048 K2: Introduced MISSING_EXCEPTION_IN_THROWS_ON_SUSPEND
    • KT-59422 K2: Missing NON_SOURCE_ANNOTATION_ON_INLINED_LAMBDA_EXPRESSION
    • KT-59804 K2: Repeat the SealedInheritorInSameModuleChecker HMPP logic
    • KT-60936 KMP: check annotations compatibility on members inside expect and actual class scopes
    • KT-60668 KMP: check expect and actual annotations match when actual method is fake override
    • KT-59419 K2: Missing MULTIPLE_DEFAULTS_INHERITED_FROM_SUPERTYPES_WHEN_NO_EXPLICIT_OVERRIDE
    • KT-59860 [FIR] False-positive UNEXPECTED_SAFE_CALL

    Docs & Examples

    • KT-66958 [Docs] Add info about generating lambda functions like the Java compiler by default

    IR. Interpreter

    • KT-64079 Native library evolution behaviour for constants

    IR. Tree

    • KT-66152 IrFakeOverrideBuilder: AssertionError "different length of type parameter lists"

    JavaScript

    • KT-45604 KJS / IR: Use globalThis instead of top level this
    • KT-64421 K2: Implement IrJsTypeScriptExportTestGenerated for K2
    • KT-64451 K2: Implement MultiModuleOrderTestGenerated for K2
    • KT-64450 K2: Implement SourceMapGenerationSmokeTestGenerated for K2
    • KT-64426 K2: Implement JsIrLineNumberTestGenerated for K2
    • KT-64422 K2: Implement IrJsSteppingTestGenerated for K2
    • KT-64445 K2: Implement **VersionChangedTestGenerated for K2
    • KT-64446 K2: Implement JsIrInvalidationPerFileWithPLTestGenerated for K2
    • KT-64423 K2: Implement JsIrES6InvalidationPerFileTestGenerated for K2
    • KT-61117 Migrate remaining legacy IC tests to IR

    Klibs

    • KT-66970 K2: "IrLinkageError: Function * can not be called" when calling @JvmStatic functions in Native test
    • KT-66611 Check, that no bad IR is produced, when we failed to compute constant default value in constant context
    • KT-66367 KLib ABI dump: support wasm_target manifest attribute
    • KT-64440 K2: Port KotlinKlibSerializerTest to K2
    • KT-64452 K2: Port FilePathsInKlibTest to K2
    • KT-61097 [PL] Don't create an executable if there were errors in PL

    Language Design

    • KT-58881 K2: Run checkers in common code against platform session
    • KT-59553 K2: Simplify rules for upper bound violated checks for qualifier in LHS of class literal
    • KT-62646 Decide on the equality compatibility
    • KT-65775 K2: Consider prohibiting actual typealias to superclass
    • KT-54309 Deprecate use of a synthetic setter on a projected receiver
    • KT-26983 Gradle buildscript (kotlin-dsl): "Smart cast to 'Foo' is impossible" due to same variable names
    • KT-57422 K2: Prohibit use-site 'get' targeted annotations on property getters

    Libraries

    • KT-63156 Remove all deprecated declarations in kotlinx-metadata-jvm
    • KT-63219 Change root package and coordinates of kotlinx-metadata-jvm to kotlin.*
    • KT-63341 K2: JVM StringBuilder has no corresponding members for expected class members
    • KT-63157 Make sure that all deprecation levels are raised to ERROR for declarations intended for removal from kotlinx-metadata
    • KT-60870 kotlinx.metadata.InconsistentKotlinMetadataException: No VersionRequirement with the given id in the table In kotlinx-metadata-jvm
    • KT-64230 Prohibit writing versions of metadata that are too high
    • KT-59441 Design reading and writing future versions of Kotlin metadata
    • KT-57922 kotlinx-metadata-jvm does not take into account strict semantics flag

    Native

    • KT-66390 Universal binary in included binaries produces universal archive as output

    Native. ObjC Export

    • KT-66565 Exporting framework "umbrella" produces an unimportable framework

    Native. Runtime. Memory

    • KT-66371 Native: nullptr access during concurrent weak processing in CMS GC
    • KT-61093 Kotlin/Native: enable concurrent weak processing by default

    Native. Swift Export

    • KT-65897 Translate constructors with primitive parameters to init methods in Swift export
    • KT-66681 Move generated swift from enum to extension

    Native. Testing

    • KT-66014 [K/N][Tests] Some testsuites don't test two-stage compilation and lose -language-version flag

    Tools. Build Tools API

    • KT-61860 Add infrastructure for BTA tests
    • KT-65048 "Can't get connection" (to daemon) when classpath has spaces

    Tools. CLI

    • KT-66703 Add JVM target bytecode version 22
    • KT-65842 K2 / CLI: "kotlinc -version" creates META-INF/main.kotlin_module
    • KT-66926 Add a flag to report warnings when errors are found
    • KT-64384 Until the REPL in K2 is not supported, display an appropriate warning

    Tools. CLI. Native

    • KT-64517 Drop deprecated KonanTargets

    Tools. Compiler Plugin API

    • KT-59555 Expose resource closing extension point in CompilerPluginRegistrar

    Tools. Compiler Plugins

    • KT-66526 K2: Special function kind setup does not work for value parameter whose type is function with a receiver

    Tools. Compiler plugins. Serialization

    • KT-63539 K2: Missing "Serializable class has duplicate serial name of property"
    • KT-65757 K2: Missing @Deprecated annotation on synthesized declarations
    • KT-64447 K2: Implement Serialization...IrBoxTestGenerated for K2

    Tools. Fleet. ObjC Export

    • KT-66695 Move analysis-api-klib-reader package into 'o.j.k.native.analysis.api`
    • KT-66380 ObjCExport: support interface implementation

    Tools. Gradle

    New Features

    • KT-67006 Create new compose compiler Gradle plugin

    Performance Improvements

    • KT-66912 Parallel compilation slowdown due to synchronization

    Fixes

    • KT-67138 Json report is empty for incremental compilation
    • KT-61171 CompilerPluginsIncrementalIT.afterChangeInPluginBuildDoesIncrementalProcessing doesn't provide a compiler plugin for K2 leading to the test failure
    • KT-67139 Build reports can be overridden
    • KT-65934 Track if Gradle configuration cache is enabled in the user builds
    • KT-65935 Track project isolation Gradle feature
    • KT-64567 [FUS] Add boolean flag into kotlin.gradle.performance collector
    • KT-66961 Early access to gradle.rootProject leads to an exception
    • KT-63619 Add Kotlin power-assert compiler plugin to feature usage statistics gathering
    • KT-62108 Wrong scope of compiler options is used while configuring options for all targets and all compilations
    • KT-63165 Gradle: checkKotlinGradlePluginConfigurationErrors uses deprecated Gradle behavior
    • KT-66374 Diagnostic for deprecated properties: false-positive warning is reported for kapt.use.k2property
    • KT-62398 KMP: Compose breaks resolution of stdlib declarations in common source set
    • KT-64046 Provide K/N version to KGP when -Pkotlin.native.enabled=true
    • KT-64848 Log K/Native compiler arguments with log level specified for compiler arguments
    • KT-65213 Collect logic for FUS metrics calculation in one place

    Tools. Gradle. JS

    • KT-66917 JS/Wasm: Upgrade NPM dependencies

    Tools. Gradle. Multiplatform

    • KT-49919 Introduce the org.gradle.jvm.environment attribute on JVM and Android published variants (both for MPP and non-MPP libraries)
    • KT-66983 MPP Configuration Cache IT fails with Gradle 8.7 on windows
    • KT-66419 Remove useless API: Kotlin compilation level compiler options DSL
    • KT-65315 KMP Composite compileIosMainKotlinMetadata fails with "Could not find <included iOS dependency>"
    • KT-61945 Report redundant dependsOn-edges
    • KT-66563 Stop including resources to metadata klib
    • KT-57141 K2: KotlinCompile task input named 'multiplatformStructure.fragments.$0.sources' is tracked in a pure JVM kotlin project together with changes of sources

    Tools. Gradle. Native

    • KT-66982 Gradle plugin corrupts Native compiler dependencies
    • KT-65641 Invalid replacements for deprecated properties 'konanHome' and 'konanDataDir' are suggested as quick fixes
    • KT-66750 Cannot query the value of task ':commonizeNativeDistribution' property 'kotlinNativeBundleBuildService' because it has no value available
    • KT-66309 K/N compiler can't be downloaded if project import is stopped while 'commonizeNativeDistribution' task is being executed and rerun again
    • KT-66422 Configuration cache breaks during Kotlin Native dependencies downloading
    • KT-65624 K/N warning: "The Kotlin/Native distribution used in this build does not provide the standard library." is displayed during configuration phase
    • KT-52483 Sign native prebuilt tars

    Tools. Incremental Compile

    • KT-61137 Incremental scripting compilation fails with 2.0
    • KT-65943 Incorrect scopeFqName recorded in LookupTracker

    Tools. Kapt

    • KT-66773 KAPT: Generated stubs cannot access annotations from other module
    • KT-59488 K2: build sphinx-kotlin
    • KT-65453 Kapt4: error "annotation @ParameterName is missing a default value for the element 'name'" for a composable lambda fun without parameters
    • KT-62097 K2: [KAPT4] Keep import statements for unresolved annotation classes
    • KT-61628 K2: testAndroidDaggerIC doesn't work with Kapt4

    Tools. Scripts

    • KT-66395 K2: Scripting test testHelloSerialization fails on K2

    Tools. Wasm

    • KT-67086 K/Wasm: wasi with binaries.library fails on import and build
    • KT-66159 K/Wasm: applyBinaryen somehow affects skiko.mjs
    • KT-66733 wasmWasiTest is not compatible with Gradle Configuration Cache
    • KT-64601 Indicate that wasmJsBrowserDevelopmentRun has finished bundling

    Open source →
21. 2.0.0-Beta520 Mar 2024pre-release
    Release notes

    Changelog

    Analysis. API

    New Features

    • KT-65327 Support reading klib contents in Analysis API

    Performance Improvements

    • KT-65560 K2: Anaysis API: ContextCollector triggers redundant resolution in the case of file elements

    Fixes

    • KT-65571 Support VirtualFile inputs to Analysis API modules
    • KT-65600 Analysis Api: FirFile for KtCodeFragments are created and not updated on changes
    • KT-64579 K2 IDE: "Expected FirResolvedArgumentList for FirAnnotationCallImpl of FirValueParameterImpl(Source) but FirArgumentListImpl found"
    • KT-65978 Analysis API: Use soft references in FileStructureCache
    • KT-64051 K2 IDE: Analysis API: Unresolved links to typealias in KDoc
    • KT-66276 K2: Analysis API: TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM false positive for script parameter
    • KT-66232 K2: Analysis API: cover ScriptWithCustomDefDiagnosticsTestBaseGenerated by LL FIR tests
    • KT-60996 K2: Stub Based Deserializer: Set versionRequirements to enable VERSION_REQUIREMENT_DEPRECATION diagnostics
    • KT-66306 K2: Analysis API: drop ability to enable global phase resolve lock
    • KT-64919 K2 IDE: Implement KMP support for sealed class inheritors
    • KT-65563 Analysis API: Missing session component FirExpectActualMatchingContextFactory in LLFirLibrarySession
    • KT-66173 K2: No 'org.jetbrains.kotlin.fir.scopes.impl.FirDelegatedMembersFilter' in array owner: LLFirLibrarySession
    • KT-66238 Gradle kotlin build scripts - a lot of unresolved symbols after latest changes in kotlin master
    • KT-65099 K2: Recursive local storage cache check for Fir2IrDeclarationStorage::createAndCacheIrPropertySymbols()
    • KT-65265 Analysis API: Add library session invalidation tests
    • KT-56288 Analysis API: Add tests for session invalidation on the Analysis API side
    • KT-64000 K2: make AnnotationArgumentsStateKeepers more accurate
    • KT-63606 K2: Analysis API: rewrite FirLazyAnnotationTransformer to avoid redundant transformations
    • KT-65191 KtFirMultiplatformInfoProvider#getExpectForActual doesn't return expect function for slightly broken code
    • KT-62136 Analysis API: Add concurrent tests for CleanableSoftValueCache
    • KT-61222 K2: Add lifecycle management for KtResolveExtension
    • KT-65960 Analysis API: Test infrastructure indexes binary libraries from decompiled files instead of stubs during IDE mode tests
    • KT-65240 K2: CodeGen API fails to resolve Annotation parameter type when it runs FIR2IR for a class with a parent class from other module if the parent class has an annotation from another module
    • KT-65344 K2: make FirScript statements (declarations) independent
    • KT-65930 AA: receiver type for Int?::foo misses nullability
    • KT-65914 AA: receiver type for this::foo returns return type of the target callable
    • KT-65780 K2: polish FileStructure implementation for FirFile
    • KT-62840 K2 Script: everything around destructuring declaration on top level of scripts are broken
    • KT-65683 Analysis API: Dangling file session creation causes a computeIfAbsent contract violation
    • KT-64884 K2 IDE. FP [NAMED_PARAMETER_NOT_FOUND] for copy method of library data class when class has not parameter-properties
    • KT-65763 K2: value parameter from library data class copy have RAW_FIR phase
    • KT-65665 Analysis API: support KtDelegatedSuperTypeEntry in KtFirExpressionInfoProvider.isUsedAsExpression
    • KT-65655 Analysis API: KtCodeCompilationException should not strongly reference FIR sessions
    • KT-65345 K2: unify FirDesignation and LLFirResolveTarget

    Analysis. Light Classes

    • KT-61734 SLC: wildcard suppression not honored
    • KT-65112 Symbol Light Classes don't support annotations on type parameters
    • KT-65843 K2: Light method returns kotlin.Unit type for TestResult return type
    • KT-65653 SLC: wrong binary resolution to function with value class
    • KT-65393 SLC: missing deprecated-hidden property
    • KT-64772 SLC: presence of source PSI for compiler-generated declaration

    Apple Ecosystem

    • KT-62373 "Xcode higher than tested" diagnostic
    • KT-64096 Diagnostic when embedAndSign used for framework with cocoapods-dependencies

    Backend. Native. Debug

    • KT-65553 K2: Native: kt42208WithPassingLambdaToAnotherFunction test fails with K2

    Backend. Wasm

    New Features

    • KT-58088 [PL] Support & enable partial linkage for Wasm
    • KT-66327 Include information about particular Wasm target into KLib manifest
    • KT-65009 Generate TypeScript definitions for the @JsExport declarations in K/Wasm

    Fixes

    • KT-65660 [WasmJs] Support catching JS exceptions
    • KT-64890 K/Wasm compiler crash with external class and Kodein
    • KT-66104 Wasm: compiler crash: NoSuchElementException: Sequence contains no element matching the predicate
    • KT-66065 [Wasm] Make specialisations for closured primitive values
    • KT-65778 Create the same TypeScript tests infrastructure for Kotlin/Wasm that we have now for Kotlin/JS
    • KT-65411 Kotlin/Wasm: Boolean boxed instances are not the same
    • KT-65713 Kotlin/Wasm generates a wrapper that cannot run in Deno
    • KT-65777 Implement named export for Kotlin/Wasm
    • KT-65824 Wasm: Allow unsigned primitives to be used inside functions annotated with @JsExport
    • KT-63939 Kotlin/Wasm Support lazy associated object initialisation
    • KT-61888 [Kotlin/wasm] in kotlin.test support for @AfterTest for async tests

    Compiler

    New Features

    • KT-64350 K2: deprecate using typealias as a callable qualifier in imports
    • KT-65478 JVM: Change inlined variable naming format
    • KT-26565 Choose existing extensions over additional built-ins members from JDK
    • KT-65859 Calls refinement extension point
    • KT-45375 Generate all Kotlin lambdas via invokedynamic + LambdaMetafactory by default
    • KT-65681 K2: Improve error message of UPPER_BOUND_VIOLATED when upper bound is a captured type or other non-denotable type
    • KT-65153 K/N: extract liveness analysis to a separate phase
    • KT-59098 Support -Xjdk-release=1.6/1.7 with -jvm-target 1.8
    • KT-63670 Implement platform specific declaration clash diagnostics across all backends

    Performance Improvements

    • KT-66341 K2: Don't build IdSignatures in FIR2IR with IR f/o builder
    • KT-66172 K2: Improve memory consumption of KtPsiSourceElement
    • KT-62798 'in' range checks are not intrinsified in kotlin-stdlib
    • KT-65579 K2: performance regression in FP Space

    Fixes

    • KT-66673 K2/JS: FirJsInheritanceClassChecker doesn't expand type aliases to supertypes
    • KT-66475 K2/KMP/Wasm: report WRONG_JS_INTEROP_TYPE from a platform checker
    • KT-66474 K2/KMP/JS: report EXTERNAL_TYPE_EXTENDS_NON_EXTERNAL_TYPE from a platform checker
    • KT-66473 K2/Wasm: FirWasmExternalInheritanceChecker doesn't expand type aliases
    • KT-65062 K2: build kotlinx.collections.immutable and pass to CI
    • KT-65410 K2: ABSTRACT_CLASS_MEMBER_NOT_IMPLEMENTED for 'removeAt' in KJK hierarchy
    • KT-65377 K2: "Argument type mismatch" caused by approximated captured type argument of generic type
    • KT-65440 K2: Mark all potential implementations of List.getFirst()/getLast() as deprecated independently of JDK
    • KT-65184 K2: disappeared TYPE_MISMATCH for java collections
    • KT-57588 K2/Native: False positive '"CONFLICTING_OVERLOADS", "PARAMETER_NAME_CHANGED_ON_OVERRIDE" on overriding objc methods
    • KT-65882 K2: "KotlinNothingValueException" caused by unsafe cast and Nothing::class
    • KT-65438 K2: Introduce WEAKLY_HIDDEN concept to built-in-JDK content mapping
    • KT-65959 K2: Incorrect warnings about inline function impact
    • KT-64994 K2: @Composable lambda type is not resolved from other modules
    • KT-66048 K2: property becomes nullable in KJK hierarchy if base declaration has implicit return type
    • KT-66148 K2. Sources of receivers updated twice because of PCLA
    • KT-65789 K1/K2: Resolve change in constructor/top-level function ambiguity
    • KT-60971 Incorrect "cannot inline bytecode built with JVM target ..." on property setter if only getter is inline
    • KT-61514 K2: Build fake overrides using IR during Fir2IR
    • KT-65584 K2: "Duplicate parameter name in a function type"
    • KT-50008 JSpecify @Nullable annotation on type-parameter bound prevents type-variable usages from being platform types
    • KT-66046 K2: false negative CANNOT_WEAKEN_ACCESS_PRIVILEGE on property
    • KT-56988 CFG, smart casts: red in K1 -> green in K2 for invalid code
    • KT-58191 K2: capturing closures successors that are already resolved (thanks to backward edges) must be taken into account for allowing smart casts
    • KT-65464 K2: False positive UNRESOLVED_REFERENCE on extension property call defined in KJK hierarchy
    • KT-62118 FIR: "HashMap.entry" has invalid enhanced type
    • KT-64840 K2: Bare type are not allowed for TV based values during PCLA
    • KT-65415 K2: Stdlib K2 build error: IrConstructorSymbolImpl is already bound
    • KT-66449 Make DiagnosticSuppressor a project-level extension
    • KT-66411 FIR: Real source on fake block around assignment expression in the "when" branch affects resolve in K2 Analysis API and IDE
    • KT-65982 K2 Scripts cannot disambiguate declarations imported from default and explicit imports
    • KT-65677 K2: Unable to resolve parent class from companion object
    • KT-66441 Remove symbol table from IR fake override builder in Fir2Ir
    • KT-58203 K2: false-negative incompatible types error on is-check with unrelated type
    • KT-65722 K2: Property reference refers to non-existent functions
    • KT-65878 K2: "ClassCastException" when passing nun-suspend lambda to SAM constructor with named argument
    • KT-65787 K2: "KotlinIllegalArgumentExceptionWithAttachments: Expected FirResolvedTypeRef with ConeKotlinType" caused by passing lambda expression with multiple labels to function
    • KT-65926 K2: add tests for all fixed-in-k2 / not-reproducible-in-k2 unresolved issues
    • KT-65022 K2: Compiler crashes when array literal is used in delegate expression
    • KT-62836 K2: Expected FirResolvedTypeRef with ConeKotlinType but was FirImplicitTypeRefImplWithoutSource
    • KT-64727 K1: Closing bracket of object inside crossinline lambda or inside lambda in inline function is not hit on step-over
    • KT-64726 K1: Cannot stop on closing bracket of crossinline lambda inside of another crossinline lambda
    • KT-64725 K1: Cannot stop on closing bracket of lambda of inline-only function
    • KT-66272 Could not load module <Error module> with a combination of type parameters
    • KT-66243 Could not load module <Error module> in a builder inference with lambda with typed parameter
    • KT-66229 Could not load module <Error module> in a builder inference with Map.Entry
    • KT-61448 K2: Disappeared DEPRECATION in testWithModifiedMockJdk
    • KT-60106 K2: Introduced REIFIED_TYPE_FORBIDDEN_SUBSTITUTION
    • KT-66120 IrFakeOverrideBuilder: wrong return type in intersection with 3 classes
    • KT-60777 K2: missing INLINE_FROM_HIGHER_PLATFORM
    • KT-66196 Convert INFERRED_TYPE_VARIABLE_INTO_EMPTY_INTERSECTION_ERROR to warning
    • KT-66067 K2: different overrides are created in a complex hierarchy with raw types and upper-bounded type parameters
    • KT-65821 K2: [NONE_APPLICABLE] None of the following functions is applicable: [constructor(message: String?): Throwable, constructor(cause: Throwable?): Throwable, constructor(): Throwable, ...]
    • KT-66268 K2: Expected FirResolvedTypeRef with ConeKotlinType but was FirUserTypeRefImpl
    • KT-60797 K2: implement JAVA_MODULE_DOES_NOT_EXPORT_PACKAGE
    • KT-28159 Smartcasts don't work with Nothing? values (Nothing? considered a null constant => an unstable value)
    • KT-28262 Smartcasts for reference equality don't work if explicit true check is used
    • KT-66000 K2: inherited inline getter has not been inlined
    • KT-66158 K2: not nullable return type for upper-bounded kotlin type parameter in KJK hierarchy
    • KT-65636 PowerAssert: Negative contains operator not aligned correctly in K2
    • KT-64271 K2: Wrong overriddenSymbols for toString of data class
    • KT-62779 K2: Difference in fake override generation
    • KT-61941 K2: FIR2IR incorrectly generates f/o structure for complex java/kotlin hierarchies with remapped jvm declarations
    • KT-60283 K2: fake override for java static method is not generated
    • KT-65095 K2: no bridge generated for getOrDefault when inheriting from Java Map implementation
    • KT-57301 K2: getOrDefault and bridges are not generated for certain Map subclasses
    • KT-58814 Too eager subtype inference in when expression
    • KT-65408 K1: "There are still 2 unbound symbols after generation of IR module" caused by data object's copy function usage
    • KT-65844 False Positive "This class can only be used as an annotation or as an argument to @OptIn" when passing as an array
    • KT-58697 K2: Tests: Assert no dump files exist when dump directive isn't present
    • KT-63258 NPE with function reference from within lambda during init
    • KT-60597 K1: IllegalArgumentException: fromIndex(0) > toIndex(-1) when wrapping receiver with backticks
    • KT-33108 USELESS_CAST false positive for cast inside lambda
    • KT-58458 K1: "java.lang.NullPointerException" with 'var equals' or 'val equals' as argument in when
    • KT-58447 K1: "AssertionError: Recursion detected on input" with @ParameterName and extension
    • KT-41013 OVERLOAD_RESOLUTION_AMBIGUITY for functions takes lambda: can not resolve it, but only named lambda parameter
    • KT-65588 K2: typealias of primitive type in vararg causes ABI incompatibility
    • KT-23873 Indexed access operator can cause false USELESS_CAST warning
    • KT-31191 Contract not smartcasting for extension functions in if-statement with multiple conditions
    • KT-63826 K2: expect for expect crashes the compiler
    • KT-25668 False-positive error on restricted suspending function call with callable reference
    • KT-18055 SMARTCAST_IMPOSSIBLE on mutable data class variable with a read-only property
    • KT-66186 K1 diagnostics miss some reporting messages
    • KT-65101 Generics behaving different when parenthesized
    • KT-63444 TYPE_MISMATCH caused by Inner class with nullable type and star projection
    • KT-58751 Definitely non-nullable type gets lost with star projection
    • KT-56624 "Unresolved reference" with import alias and enum constructor call
    • KT-53886 NoSuchMethodError exception in Kotlin/Native compiler
    • KT-20617 Qualified this@property does not work in extension properties with body expression
    • KT-10879 OVERLOAD_RESOLUTION_AMBIGUITY for synthetic property accessor with smartcasted receiver
    • KT-65649 K2: IR has incorrect origins for some inplace updating operators
    • KT-63525 K2: "IllegalStateException: Fake override should have at least one overridden descriptor" caused by unreachable code
    • KT-65333 K2: UNRESOLVED_REFERENCE for java inner class in intersection scope
    • KT-63712 Make it possible to add new stdlib API with SinceKotlin(2.0)
    • KT-63741 K2: fix visibility inference with overridden + inherited member
    • KT-64488 K2: False positive DEPRECATED_ACCESS_TO_ENTRY_PROPERTY_FROM_ENUM with context receivers
    • KT-57585 K2/MPP: false-negative errors on expect/actual modifiers mismatch
    • KT-66077 IrFakeOverrideBuilder: NPE from IrJavaIncompatibilityRulesOverridabilityCondition.doesJavaOverrideHaveIncompatibleValueParameterKinds
    • KT-66020 K2: ISE "IrPropertySymbolImpl is unbound. Signature: null" on a property with getter with @JvmName
    • KT-62135 K2, KLIB: Classes are still sorted before serializing them to metadata
    • KT-66005 K2: "Should not be here: class org.jetbrains.kotlin.fir.expressions.impl.FirResolvedReifiedParameterReferenceImpl" on incorrect comparison of reified type parameter
    • KT-65840 [K2] Initializer type mismatch: expected 'Type', actual 'Type'
    • KT-59882 K2: Disappeared CANNOT_INFER_PARAMETER_TYPE
    • KT-65002 K2: Incorrect suspend conversion if argument is an aliased functional type
    • KT-65984 K2 scripting: failure on processing SUPPRESS annotation in the last script statement
    • KT-65680 K2: Class redeclaration leads to BackendException during IR fake override builder
    • KT-66028 K2: Convert FirExpectActualDeclarationChecker to platform checker
    • KT-65592 K2: IrFakeOverrideBuilder: ISE "should not be called" on diamond hierarchy with explicit dependency on annotations.jar
    • KT-65983 K2 gradle scripting: "'val' cannot be reassigned" errors
    • KT-64502 K2: Internal error on calling function before declaration
    • KT-60452 K2 Scripting: implement overriding of the script params
    • KT-65975 K2: Implicit receivers resolution order in K2 scripting
    • KT-60249 K2: No unit coercion generated for loops body
    • KT-65801 IrFakeOverrideBuilder - visibility is lost for setter in KJK hierarchy
    • KT-65937 K2: order of enum entries changed
    • KT-65933 K2: Type missmatch in arrays in annotations
    • KT-65343 JVM IR: Source parameter is lost when copying with DeepCopyIrTreeWithSymbols
    • KT-62788 K2: difference in annotation inheritance in overriddings
    • KT-65669 K2: ClassCastException class FirDeclarationStatusImpl cannot be cast to class FirResolvedDeclarationStatus
    • KT-65493 IrFakeOverrideBuilder: difference in return type for intersection with raw type
    • KT-65207 IrFakeOverrideBuilder - nullable return type for intersection override
    • KT-65972 Fix problems related to Unknown visibility in [FP] intellij
    • KT-65246 K2: Overiding java method that takes vararg parameter causes WRONG_NULLABILITY_FOR_JAVA_OVERRIDE warning
    • KT-59883 K2: Disappeared INVALID_IF_AS_EXPRESSION
    • KT-61823 K2: Render list of declarations in diagnostic messages with linebreak as separator
    • KT-65302 IrFakeOverrideBuilder - missing @EnhancedNullability
    • KT-65241 K2: [LT] Compiler crash on assignment expression with incorrect lvalue
    • KT-60006 K2: Disappeared EXPRESSION_EXPECTED
    • KT-65817 K2: Check if callable reference vararg adaption can be affected by primitive type aliases
    • KT-65920 K2: no field for delegation is created
    • KT-65487 K2: Different fake overrides and false positive NOTHING_TO_OVERRIDE for intersection/override with Collection.remove
    • KT-62931 K2: extra class files for @OptionalExpectation marked annotations
    • KT-59400 K2: Missing CANNOT_INFER_VISIBILITY
    • KT-65460 Don't compare order of functions in IR dump
    • KT-64276 [K/N][K2] K2 behaviorial difference with inconsistent inheritance of ObjCName
    • KT-65572 [K/N][K2] INCOMPATIBLE_OBJC_NAME_OVERRIDE error message changed from K1
    • KT-63879 K2: Redundant flag declaresDefaultValue for parameter of function inherited from delegate
    • KT-65790 K2: Move check for private-to-this visibility into checker
    • KT-65551 K2: Property redeclaration on native compilation leads to NotImplementedError
    • KT-65770 K2: Diagnostic rendering of vararg Foo parameter produces vararg Array<Foo>
    • KT-65555 K2: must override 'spliterator' because it inherits multiple implementations for it
    • KT-65337 K2: False positive UNRESOLVED_REFERENCE when lambda labeled by illegal label and operator-invoked
    • KT-65448 K2: fake overrides are not generated for 'containsAll', 'removeAll', 'retainAll' if inherited from raw type
    • KT-65298 K2: not nullable return type and parameter for raw types
    • KT-65706 K2: IrFakeOverrideBuilder: ISE "Fake override should have at least one overridden descriptor" on J-K-J-K hierarchy with interface delegation
    • KT-61798 K2 incorrectly calculates modality of property accessors
    • KT-65604 K2: INAPPLICABLE_JVM_NAME: effective modality
    • KT-65637 Prepare documentation for PCLA implementation
    • KT-49283 Support contribution type info from a nested builder inference call
    • KT-64077 K2: Builder inference ignores constraints from nested builder inference
    • KT-49160 Couldn't infer a type argument through several builder inference calls broken by a local class
    • KT-65057 K2: Wrong type inferred in code with heavy use of generics
    • KT-64309 Generate a variable mapping for continuation parameter in suspend methods just from the start
    • KT-61088 K2: return types of non-last-expression calls to @PolymorphicSignature methods inside try-expressions don't resolve to void when required
    • KT-65262 K2: Exception in DFA for combination of try-finally + PCLA + DI
    • KT-58169 K2: make equals bounded smart casts work the same as in K1
    • KT-64102 K2: Missing (disappeared in this case) DELEGATE_USES_EXTENSION_PROPERTY_TYPE_PARAMETER_ERROR
    • KT-63988 K2: Reflection cannot find type of local class of local class
    • KT-63901 K2: Different naming of inner class in metadata
    • KT-63655 K2: incorrect short class name in metadata for anonymous object inside a local class
    • KT-63737 Wasm: revise external declaration FE checker for WASI mode
    • KT-59782 K2: Forbid local delegated properties with private accessors in public inline functions
    • KT-64222 K2: "return type is not a subtype of the return type of the overridden member"
    • KT-63448 K2: CONFLICTING_INHERITED_JVM_DECLARATIONS with @JvmField
    • KT-59748 K2: Return type mismatch: expected Unit, actual Any? for when with an assignment in branch

    Docs & Examples

    • KT-64710 [Docs] Update What's new for 2.0.0-BetaX

    IDE. Gradle Integration

    • KT-65617 K/N project import fails if ~/.konan dir is empty

    IR. Actualizer

    • KT-60847 K2: Fake overrides are incorrect after actualization
    • KT-63756 K2: "AssertionError: No such value argument slot in IrConstructorCallImpl" caused by actual typealias for annotation with default parameter

    IR. Inlining

    • KT-66017 K2 / Native: "NoSuchElementException: Sequence contains no element matching the predicate" on building native release binaries
    • KT-64807 Refactor InlineFunctionResolver
    • KT-64806 Move FunctionInlining to separate module

    IR. Tree

    • KT-66152 IrFakeOverrideBuilder: AssertionError "different length of type parameter lists"
    • KT-65971 K2: Investigate diagnostic test failures with IrFakeOverrideBuilder
    • KT-61360 Fix essential problems in IrFakeOverrideBuilder

    JavaScript

    • KT-8373 JS: support ES6 as compilation target
    • KT-63907 KJS: default parameters in interfaces are lost in implementations
    • KT-64708 KJS: exported interfaces missing __doNotUseOrImplementIt when extending from external types
    • KT-62806 KJS: Type mismatch on inferred return type with Nothing
    • KT-64421 K2: Implement IrJsTypeScriptExportTestGenerated for K2
    • KT-61526 KJS: Compiled files clash with the new per-file granularity
    • KT-63359 K2: support new ways to declare TestResult in JS TestGenerator lowering
    • KT-65216 K2 JS: False positive JS_NAME_CLASH diagnostic on generic interface

    Klibs

    • KT-33411 Kotlin/Native crashes if several libraries have declarations with the same FQ name
    • KT-44626 Umbrella issue: different kinds of klib IR linker error messages
    • KT-64440 K2: Port KotlinKlibSerializerTest to K2
    • KT-64452 K2: Port FilePathsInKlibTest to K2
    • KT-65723 K2: Signature clash diagnostic fails for parametrized function with Unsupported pair of descriptors
    • KT-65442 [klibs] header klibs: keep internal declarations and declarations inside inlines

    Language Design

    • KT-65965 KMP: Parameter properties in constructor of external class
    • KT-64187 K2: False positive ABSTRACT_NOT_IMPLEMENTED caused by the fact that common code sees platform code of its dependencies
    • KT-65881 K2: Missing ITERATOR_MISSING in for loop on object
    • KT-65964 KMP: Private constructor in external classes
    • KT-61340 K2: Allowed smart cast in common which should be prohibited in platform
    • KT-51827 Inconsistent behavior with smartcast and protected members

    Libraries

    • KT-54879 Add callsInPlace contract for more functions in stdlib
    • KT-65532 Stabilize experimental API for 2.0
    • KT-66102 Constructor-like function for creating AutoCloseable instances
    • KT-55777 Unresolved kotlin.AutoCloseable in JVM
    • KT-65590 Make CharSequence.isBlank idiomatic and improve its performance
    • KT-63219 Change root package and coordinates of kotlinx-metadata-jvm to kotlin.*
    • KT-65518 Memory leak in buildMap and in Wasm/Js/Native (Linked)HashMap
    • KT-65525 JS: Wrong return value of HashMap.keys.remove

    Multiplatform Wizard

    • KT-66188 Update Compose for Desktop version to 1.6.0

    Native

    • KT-65659 [K/N][K2] Typealiased kotlin.Throws isn't translated to NSError out param

    Native. ObjC Export

    • KT-65863 Native: implement a flag to emit compiler errors on ObjCExport name collisions

    Native. Swift Export

    • KT-65673 Expose parts of Kotlin/Native runtime to Swift export
    • KT-65668 Support for Unsigned Types
    • KT-65335 Swift Export: Remove KotlinSirOrigin hierarchy in favour of direct AA usage
    • KT-65672 Swift Export: import C bridges as Clang module

    Native. Testing

    • KT-64393 Use Compiler Core test infrastructure for testing serialization diagnostics on Native
    • KT-65117 Implement IrBackendFacades for Kotlin/Native backend

    Reflection

    • KT-65156 Calls to callBy that use default arguments fail with KotlineReflectionInternalError when the argument size is a multiple of 32 in a constructor that contains value class as a parameter

    Tools. CLI

    • KT-65094 K2: Revise PerformanceManager reporting
    • KT-64989 Mark the whole diagnostic position range instead of only start position
    • KT-64608 K2: Wrong end position of compiler diagnostics

    Tools. CLI. Native

    • KT-64517 Drop deprecated KonanTargets

    Tools. Compiler Plugin API

    • KT-59555 Expose resource closing extension point in CompilerPluginRegistrar

    Tools. Compiler Plugins

    • KT-65690 jvm-abi-gen: Remove internal declarations from ABI
    • KT-64590 jvm-abi-gen: Effectively private classes are not being removed from ABI
    • KT-63507 K2 / All-open plugin: "'open' has no effect on a final class" warning
    • KT-66208 PowerAssert: some built-in operators are not aligned correctly for some values
    • KT-65810 PowerAssert: Infix transformation doesn't capture full context
    • KT-65640 PowerAssert: Infix function not aligned correctly
    • KT-61993 K2: Synthetic file classes are generated with start offset of 0, causing errors during compilation
    • KT-63617 Add kotlin-power-assert to Kotlin repository

    Tools. Fleet. ObjC Export

    • KT-65384 ObjCExport: class super name special case
    • KT-66380 ObjCExport: support interface implementation
    • KT-65670 ObjCExport: Naming: Support additional module based prefix
    • KT-64953 ObjCExport: Analysis-Api: enum
    • KT-65348 ObjCExport: Char as function return type
    • KT-65738 ObjCExport: Analysis-Api: Generate base declarations
    • KT-65204 ObjCExport: Analysis Api: Support nested classes
    • KT-65225 ObjCExport: implement KtCallableSymbol.isArray

    Tools. Gradle

    New Features

    • KT-62921 Add API to allow getting the version of the kotlinc compiler

    Performance Improvements

    • KT-64353 Improve reuse of Build Tools Api's classloader

    Fixes

    • KT-63619 Add Kotlin power-assert compiler plugin to feature usage statistics gathering
    • KT-64203 Throw exception when old build report properties are used
    • KT-66429 Move WASM stability warning to KGP Tooling Diagnostics and report it once per build
    • KT-63419 Deprecate 'kotlinOptions' DSL
    • KT-65952 PowerAssert: Update Gradle extension to be more idiomatic
    • KT-65951 PowerAssert: Add Gradle integration tests to compiler plugin
    • KT-66373 [Wasm, KGP] Npm is not configured for JS usagе for wasmWasi project
    • KT-66314 Build reports in JSON: property 'kotlin.build.report.json.directory' without value causes NPE
    • KT-64380 Add project diagnostics for deprecated properties
    • KT-65986 GradleDeprecatedOption.removeAfter does not actually remove arguments from the compilerOptions/kotlinOptions DSLs
    • KT-65768 Don't pass -Xfragment-sources for non-mpp compilations
    • KT-64378 Compatibility with Gradle 8.6 release
    • KT-65989 Compile against Gradle API 8.6
    • KT-65819 Build Gradle Plugins against Gradle 8.5 API
    • KT-65701 Limit Gradle daemon max memory in integration tests
    • KT-65568 Deprecate the ability to configure compiler options in KotlinCompilation
    • KT-64355 Add plugin variant for gradle 8.5
    • KT-62640 Compatibility with Gradle 8.5 release
    • KT-64504 Remove ownModuleName from AbstractKotlinCompile
    • KT-65708 Flaky tests because of ivy repos in Integration Tests
    • KT-56904 Enable warnings-as-error for Kotlin Gradle plugins compilation

    Tools. Gradle. JS

    • KT-65870 KJS / Gradle: kotlinUpgradePackageLock fails making Yarn unusable

    Tools. Gradle. Multiplatform

    New Features

    • KT-66047 KMP: Isolate dependencies graph between main and test source sets
    • KT-65196 Add high-level DSL to configure compiler options in the multiplatform project

    Fixes

    • KT-61078 K2: Compilation fails in FirSerializer trying to serialize nested class
    • KT-66372 KMP: JVM dependency can be downgraded by metadata dependency
    • KT-66514 Don't get output file from Cinterop task for IDE Import if host os doesn't support it
    • KT-66431 KMP: External Target Compilation friendArtifactResolver throws ClassCastException
    • KT-64995 KonanPropertiesBuildService is not compatible with Project Isolation
    • KT-63753 K2: File "does not belong to any module" when it is generated by registerJavaGeneratingTask in AGP
    • KT-65426 K2: Debug compilation fails because code from main source set included in two K2 fragments
    • KT-62508 Merge Android Source Sets into one K2 Fragment
    • KT-65187 Remove deprecated platform plugins ids
    • KT-63206 Deprecate eager CInteropProcess.outputFile in favor to lazy outputFileProvider

    Tools. Gradle. Native

    • KT-65624 K/N warning: "The Kotlin/Native distribution used in this build does not provide the standard library." is displayed during configuration phase
    • KT-65823 Add downloading k/n dependencies to KotlinNativeProvider
    • KT-65985 Race condition during simultaneous execution of several native tasks
    • KT-64903 Add maven repo with dev versions into IT

    Tools. Incremental Compile

    • KT-65943 Incorrect scopeFqName recorded in LookupTracker
    • KT-62101 IC: Execution failed for ClasspathEntrySnapshotTransform: when using tools.jar as dependency

    Tools. Kapt

    • KT-65399 K2 QG: Kapt3 with K2 produces incorrect code
    • KT-44706 KAPT: @JvmRecord causes "Record is an API that is part of a preview feature"
    • KT-64391 Some K2 Kapt integration tests are being executed with K1
    • KT-65404 KAPT should print a warning if stub generation is triggered for an interface with method bodies but without -Xjvm-default=all or -Xjvm-default=all-compatibility
    • KT-65453 Kapt4: error "annotation @ParameterName is missing a default value for the element 'name'" for a composable lambda fun without parameters

    Tools. Scripts

    • KT-65865 K2: Compile scripts in a separate session
    • KT-65967 Scripts in common source roots should be forbidden for now

    Tools. Wasm

    • KT-64553 K/Wasm: enable binaryen by default in production builds
    • KT-66159 K/Wasm: applyBinaryen somehow affects skiko.mjs
    • KT-66228 K/Wasm 2.0.0-Beta4 distribution doesn't contain all files
    • KT-65889 wasmJsBrowserDistribution doesn't copy wasm binaries to dist folder
    • KT-65686 K/Wasm: Binaryen and d8 have to be downloaded via the same mechanism as Node.js and Yarn
    • KT-58291 Wasm: --tests argument is ignored when running wasmBrowserTest

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