org.jetbrains.kotlin:kotlin-stdlib-js

Changelog

Compiler

• KT-83984 Data races around kotlinx.serialization plugin protobuf extensions registration
• KT-83317 ClassCastException: with cast kotlin.UInt to java.lang.Number when defining constant
• KT-83031 K2: unstable resolution of EnhancedNullability from type-use NotNull in presence of unused code
• KT-81700 flaky overload resolution behaviors (false-positive errors, different final candidates, compile-time failures)
• KT-83983 Revert of KT-83081
• KT-83314 JSpecify @NullMarked changes Java equals(Object) to equals(Any?) causing override conflict in Kotlin 2.3
• KT-82863 @NoInfer regression since 2.2.20
• KT-82841 "kotlin.NoWhenBranchMatchedException" in when with !is check & non-sealed class in the middle of hierarchy

JVM. Reflection

• KT-83608 Kotlin-reflect: "Unknown origin of public abstract operator fun invoke(p1: P1, p2: P2): R"
• KT-83361 "KotlinReflectionInternalError: Type parameter not found: 0" on super types with Kotlin 2.3.0
• KT-42199 "KotlinReflectionInternalError: Unknown origin of public abstract operator fun invoke" on function reference to FunctionN.invoke
• KT-81024 Reflection: New KType implementation fails on arguments comparison for a Nothing type parameter

Tools. Compiler Plugins

• KT-83266 "Unsupported class file major version 69" for "produceReleaseComposeMapping" task with Kotlin 2.3
• KT-83099 Compose compiler does not generate stack trace mappings for project files

Tools. Gradle

• KT-83070 The KGP api reference is missing a description
• KT-82459 Improve iOS simulator boot implementation

Tools. Gradle. JS

• KT-82946 Js, Wasm: Upgrade NPM dependencies

Tools. Gradle. Multiplatform

• KT-83687 Revert deprecation of 'androidTarget' for AGP lower than 9

ChangeLog

Compiler

• KT-83984 Data races around kotlinx.serialization plugin protobuf extensions registration
• KT-83983 Revert of KT-83081

Changelog

Compiler

• KT-83314 JSpecify @NullMarked changes Java equals(Object) to equals(Any?) causing override conflict in Kotlin 2.3
• KT-83317 ClassCastException: with cast kotlin.UInt to java.lang.Number when defining constant
• KT-83031 K2: unstable resolution of EnhancedNullability from type-use NotNull in presence of unused code
• KT-82863 @NoInfer regression since 2.2.20
• KT-82841 "kotlin.NoWhenBranchMatchedException" in when with !is check & non-sealed class in the middle of hierarchy

Compose compiler

• b/195200551 Fix classId for detecting protobuf enums
• b/463961757 Simplify Compose group analysis
• b/463961757 Fix analysis of boolean captures in composable lambda
• b/461766771 Fix IrSimpleFunction.isLegacyOpenFunctionWithDefault

JVM. Reflection

• KT-83608 Kotlin-reflect: "Unknown origin of public abstract operator fun invoke(p1: P1, p2: P2): R"
• KT-42199 "KotlinReflectionInternalError: Unknown origin of public abstract operator fun invoke" on function reference to FunctionN.invoke
• KT-81024 Reflection: New KType implementation fails on arguments comparison for a Nothing type parameter
• KT-83361 "KotlinReflectionInternalError: Type parameter not found: 0" on super types with Kotlin 2.3.0

Tools. Compiler Plugins

• KT-83266 "Unsupported class file major version 69" for "produceReleaseComposeMapping" task with Kotlin 2.3
• KT-83099 Compose compiler does not generate stack trace mappings for project files

Tools. Gradle

• KT-83070 The KGP api reference is missing a description
• KT-82459 Improve iOS simulator boot implementation

Tools. Gradle. JS

• KT-82946 Js, Wasm: Upgrade NPM dependencies

Tools. Gradle. Multiplatform

• KT-83687 Revert deprecation of 'androidTarget' for AGP lower than 9

Changelog

Analysis API

• KT-80082 K2. False positive "Cannot resolve method" for self-bounded generic with wildcard return type in Java interop
• KT-80303 Move :native:analysis-api-klib-reader to :libraries:tools

Analysis API. Code Compilation

• KT-70860 K2 IDE / Kotlin Debugger: CCE “java.lang.String cannot be cast to java.lang.Void” on evaluating not-null variable on the line with assigning null to that var
• KT-78554 K2 IDE / Kotlin Debugger: ISE “No override for FUN IR_EXTERNAL_DECLARATION_STUB” on calling toString() for local class instance during evaluation
• KT-73201 K2 IDE: Error while evaluating expressions with local classes

Analysis API. FIR

• KT-81378 Expected expression 'FirFunctionCallImpl' to be resolved caused by suspend {}
• KT-80473 Add events for tracking LL activities
• KT-46375 Analysis API: Support cross-file class redeclaration checks using indices
• KT-80471 Analysis API: Deduplicate equivalent call candidates in resolveToCallCandidates
• KT-79653 [Analysis API] ContextCollector: BODY context of enum classes doesn't contain enum entries
• KT-75858 K2 AA: False positive 'property must be initialized' on incremental analysis with 'field' usage and semicolon in setter
• KT-80231 AnnotationArgumentsStateKeepers doesn't restore the initial annotation in some cases
• KT-80233 Pull mutation out of AnnotationArgumentsStateKeepers
• KT-71466 LLFirBuiltinsSessionFactory uses createCompositeSymbolProvider
• KT-76432 JavaClassUseSiteMemberScope: Expected FirResolvedTypeRef with ConeKotlinType but was FirUserTypeRefImpl

Analysis API. Infrastructure

• KT-80717 Support IntelliJ Bazel build in the Kotlin Coop development mode

Analysis API. Light Classes

• KT-80656 Duplicate no-args constructor in PSI
• KT-60490 Symbol Light Classes: Property accessors from a delegated interface don't present in the delegating class
• KT-79689 SymbolLightClassForClassLike.toString() causes PSI tree loading
• KT-80690 Private interface functions are not present in light classes
• KT-80256 K2: Certain actions in JPA code causes infinite PIEAE: "Element class CompositeElement of type REFERENCE_EXPRESSION (class KtNameReferenceExpressionElementType)"
• KT-79012 Add a high-level overview of light classes

Analysis API. Providers and Caches

Fixes

• KT-81476 Analysis API: AlreadyDisposedException from low-memory cache cleanup
• KT-80911 Analysis API: Execute session invalidation in a non-cancelable section
• KT-81242 Analysis API: Add UUID/lifetime properties to LL FIR session structure logging
• KT-80622 Analysis API: Visualise LL FIR session structure & weight
• KT-80904 Analysis API: "Invalid dangling file module" exception during session invalidation
• KT-78882 K2 AA: Calling containingSymbol on getProgressionLastElement causes exception
• KT-58325 Analysis API: Combine LLKotlinStubBasedLibrarySymbolProviders in session dependencies (optimization)
• KT-77825 Analysis API: CheckersComponent consumes a lot of memory while being unused in LL FIR sessions
• KT-76526 Incorrect built-in module is provided for non-JVM sources in Standalone
• KT-62549 Analysis API: Cache callables in combined Kotlin symbol providers
• KT-70721 LL FIR: investigate possibility of moving LLFirFirClassByPsiClassProvider . getClassByPsiClass (PsiClass) to symbol providers
• KT-72998 Analysis API: Introduce getClassLikeSymbolByPsi to LL FIR symbol providers

Analysis API. Standalone

• KT-81108 AA: java.lang.ClassCastException: class org.jetbrains.kotlin.fir.FirBinaryDependenciesModuleData cannot be cast to class org.jetbrains.kotlin.analysis.low.level.api.fir.projectStructure.LLFirModuleData
• KT-80573 Potential performance issue on class ID computation
• KT-80559 Try to optimize KotlinStandaloneDeclarationProviderFactory startup for tests
• KT-71706 Analysis API Standalone: StandaloneProjectFactory.createSearchScopeByLibraryRoots creates inefficient file-based search scopes

Analysis API. Stubs and Decompilation

Performance Improvements

• KT-77097 Support ReplaceWith deprecation annotation argument via stubs

Fixes

• KT-80350 Drop K1 decompiler
• KT-77082 StackOverflowError in CreateFreshTypeVariableSubstitutorStage.shouldBeFlexible
• KT-80798 Improve stubs tests coverage
• KT-75318 Read context parameter fields from metadata in CallableClsStubBuilder
• KT-77874 AA disagrees with the compiler on descriptions of context parameters from binaries in messages for context argument ambiguity errors
• KT-80276 Implement native coping for stubs
• KT-79780 Decompiled MultifileClass has Facade kind
• KT-79398 isClsStubCompiledToJvmDefaultImplementation flag is inconsistent for compiled and decompiled stubs
• KT-79798 Prettify stub usages in LL stub-based deserializer
• KT-78949 AbstractLLStubBasedResolutionTest: tests against real stub-based files
• KT-80251 Inconsistent decompiled and compiled stub for properties with an initializer and a delegate
• KT-74547 Implement decompiler for K2
• KT-79555 Move KotlinFileStubImpl serialization/deserialization to the Analysis API
• KT-79487 "null DefinitelyNotNullType for 'T'" from decompiler
• KT-60764 Stub Builder: fix differences between K1 and K2 stub building on decompiled files
• KT-79484 An empty enum class with a member decompiles with a synthetic error
• KT-79730 Decompiled files have an extra Kt suffix
• KT-79483 data modifier is not present on object modifier
• KT-75398 Local classes from scripts have ClassId in stubs
• KT-79412 Context parameters with type annotations cause inconsistency errors while building stubs

Analysis API. Surface

New Features

• KT-80084 Provide endpoints for Analysis API to understand when the context sensitive resolution is used
• KT-64340 Analysis API: no way to get a type of vararg parameter
• KT-68387 AA: provide context for type approximations

Performance Improvements

• KT-80713 Optimize KaDeclarationSymbol#visibility for class-like symbols
• KT-79097 KaFirNamedFunctionSymbol#isSuspend shouldn't trigger resolution
• KT-79095 isOverride shouldn't trigger resolution if not compiler plugins present

Fixes

• KT-80234 Incorrect value of isActual for the implicitly actual constructor of annotation class
• KT-81132 Use KaSession instead of a particular KaSessionComponent for context parameter bridges
• KT-81129 K2: KaSymbolInformationProvider#importableFqName: should return null for dynamic declarations
• KT-81128 K2: KaSymbolInformationProvider#importableFqName: should return null for error destructuring declarations
• KT-81127 K2: KaSymbolInformationProvider#importableFqName: should return null for anonymous functions
• KT-81126 K2: KaSymbolInformationProvider#importableFqName: should return null for enum entry initializer constructors
• KT-81125 K2: KaSymbolInformationProvider#importableFqName: should return null for property accessors
• KT-81124 K2: KaSymbolInformationProvider#importableFqName: type alias constructor should have a reference to the type alias and not to the underlying class
• KT-70127 Analysis API: 'KaFirReceiverParameterSymbol' does not implement 'KaFirSymbol'; leads to exception from importableFqName
• KT-81123 Reimplement KaFirSymbolInformationProvider#importableFqName
• KT-81122 Drop KaImportOptimizer
• KT-78093 Add bridges for context parameters
• KT-79772 Migrate from 'validityAsserted' to 'withValidityAssertion'
• KT-79328 K2 AA, isUsedAsExpression: Unhandled Non-KtExpression parent of KtExpression: class org.jetbrains.kotlin.psi.KtImportDirective
• KT-80366 IllegalStateException from KaFirStopWorldCacheCleaner
• KT-80274 Merge AbstractMultiModuleSymbolByPsiTest to AbstractSymbolByPsiTest
• KT-80352 KaBaseResolutionScope.contains(PsiElement) always returns false for Android light classes (e.g. synthetic R.java classes)
• KT-80178 Incorrect modality for an abstract interface function with a redundant open modifier
• KT-79129 [Analysis API] KaFe10TypeCreator.buildClassType cannot build builtin types by class ids
• KT-79143 AA: argumentMapping contains an expression that is not an argument
• KT-59857 KaExpressionTypeProvider#returnType shouldn't throw an exception for class like declarations
• KT-79667 Enable resolve on java record components in standalone mode
• KT-73050 KaFirSymbolRelationProvider#expectsForActual: suspicius logic for KaReceiverParameterSymbol
• KT-78904 KaBaseWriteActionStartedChecker throws when no additional WA was done
• KT-79281 Add KDoc to KaTypePointer#restore
• KT-78597 KaUseSiteVisibilityChecker returns false for internal functions exposed via implicit receiver
• KT-71705 FIR api impl: Postfix increment expression's expressionType is Unit when incrementing array element
• KT-75057 Analysis API: Reference to object through typealias in invoke operator call leads to original type

Backend. Native. Debug

• KT-79848 Flaky debugger tests in opt.debug/cache.*/GC.CMS/GC.sch.ad/alloc.custom configuration

Backend. Wasm

New Features

• KT-59032 Support instantiation of annotation classes on WASM

Fixes

• KT-76204 K/Wasm: support generating a wasm module per kotlin module/klib
• KT-79357 K/Wasm: store data for string literals in utf8 for Latin1
• KT-82075 K/Wasm: kotlin.wasm.internal.getSimpleName crashes on iOS Safari older than 26
• KT-79244 [Wasm] Drop K1-specific tests, testrunners and test directives
• KT-69621 K/Wasm: Consider enabling support for KClass.qualifiedName by default
• KT-80397 K/Wasm: turn on by default using a new version of the exception handling proposal for wasm-wasi target
• KT-81372 K/Wasm: JsException: Exception was thrown while running JavaScript code on Safari 18.2/18.3
• KT-80018 K/Wasm: exceptions don't work properly in JavaScriptCore (vm inside Safari, WebKit)
• KT-66072 K/Wasm: improve how exceptions work in JS interop
• KT-80106 devServer in Kotlin/Wasm overwrites defaults, causing missing static paths
• KT-80210 Wasm: "Unexpected non-external class: kotlin.Nothing" caused by JsExport with JsPromise
• KT-80555 WASM IC: Can't link symbol on kotlinx.coroutines on fresh master
• KT-80415 WasmJs Number Elvis Operator Crash
• KT-76509 WasmJS: ReferenceError: Temporal is not defined caused by "Redundant reference to unused external results"
• KT-79317 [Wasm] Do not throw CCE for ExcludedFromCodegen declarations
• KT-78036 K/Wasm: generate a message with "expected" and "actual" types in case of CCE

Compiler

New Features

• KT-80461 K2: false positive NO_ELSE_IN_WHEN for complex sealed hierarchy
• KT-77676 K/N: enable typechecks and the casts optimization pass in debug mode by default
• KT-79185 Support local type aliases
• KT-80837 Warn about extension function with a context shadowed by member
• KT-80768 Warning on overloading by a superset of context parameters in class context
• KT-80031 Check spotbugs's @CheckReturnValue in Kotlin's unused return value checker
• KT-79380 Native: add performance measurement for the rest of backend phases
• KT-79381 Native: add performance measurement of LLVM phases
• KT-80222 Implement the prohibition of always-false is checks for definitely incompatible types
• KT-79295 Parse and build raw FIR from new short and full forms of positional destructuring with square brackets
• KT-74810 Support typealiased/mapped Java types in unused return value checker
• KT-71244 Incorporate existing @CheckReturnValue annotation(s) into Kotlin's unused return value checker
• KT-79922 Record 'MustUse/ExplicitlyIgnorable' state for overrides even in disabled RVC mode
• KT-79920 Store 'Explicitly ignorable' state of function/property in the metadata
• KT-79690 Implement a USELESS_ELVIS_LEFT_IS_NULL with elvis expression
• KT-79296 Implement/adapt diagnostics for new destructuring
• KT-79298 Report errors on new destructuring syntax in K1

Performance Improvements

• KT-81617 Native: casts optimizations pass explodes on deep nested loops
• KT-80554 Kotlin/Native: investigate performance hit from always-on llvm pass profiling
• KT-81340 K/N: severe compilation time degradation after turning on casts optimization pass
• KT-80370 Add NO_INLINE attribute to some of runtime functions
• KT-80167 K/N: condense the nodes and edges in DevirtualizationAnalysis constraint graph
• KT-79535 Revert incorrect SAM conversion enhancements brought to K2

Fixes

• KT-79979 K2: ClassCastException when overriding extension property with delegation
• KT-82590 ClassCastException when instantiating class with generics implemented by fun interface and lambda
• KT-78881 K2: False positive "Assigned value is never read" in composable function
• KT-79276 Dexing fails with "Cannot read field X because <local0> is null" with 2.2.0
• KT-79547 "UnsupportedOperationException: Not supported" with inlining and value classes
• KT-79442 "Multiple annotations of type kotlin.coroutines.jvm.internal.DebugMetadata": 2.2.0-Beta1 generates broken code with JVM default suspend methods in interfaces
• KT-80744 Kotlin failure on lambda with type parameter
• KT-81618 "Number of arguments should not be less than number of parameters" on JVM on Kotlin 2.3.0-Beta1
• KT-82869 Green-to-Red change in 2.3 after prioritizing non-suspend-function-type overloads
• KT-79611 "IllegalStateException: couldn't find inline method": Exception during incremental compilation
• KT-78895 Consider dropping isLocalInFunction and FirClassLikeDeclaration.isLocal
• KT-82040 Native: ClassCastException: PointerInputChange
• KT-81924 K2: "Cannot infer type for this parameter", "Overload resolution ambiguity between candidates"
• KT-80864 K2: Missing Val cannot be reassigned diagnostic for Java final fields (crashes in runtime with IllegalAccessError)
• KT-71420 Report error when reified type parameter is inferred to intersection type
• KT-79451 Rework approach to recursive types approximation
• KT-78413 Kotlin Debugger: value classes as context parameters have incorrect names in Variables View during debugging
• KT-82138 Debugger: Cannot evaluate JvmInline value class parameter
• KT-82381 ArrayIndexOutOfBoundsException while FirDiagnosticsCompilerResultsReporter tries to print code as part of a warning log
• KT-81068 Corrupted Unicode paths passed or used in the compiler
• KT-79783 KDoc parser: Links aren't rendered if the line has an indent of 4 or more
• KT-80549 Call of Java method with type parameter bounds: Expected FirResolvedTypeRef with ConeKotlinType but was FirJavaTypeRef
• KT-82132 False-positive type mismatch with -language-version 2.2
• KT-81988 K2: Any?.toString() causes NPE inside lambda with Java
• KT-81652 Native: ClassCastException: ApplicationForegroundStateListener.Companion
• KT-76479 Backend. JVM: Report errors on exposure of types in inline functions
• KT-82022 K/N: Unexpected "Annotation @JvmInline is missing on actual declaration" warning with value classes
• KT-80250 ISE: flow for PostponedLambdaExitNode not initialized - traversing nodes in wrong order?
• KT-76344 Drop language version 1.9 for non-JVM platforms
• KT-76343 Drop language version 1.8
• KT-80330 K2: NPE at org.jetbrains.kotlin.fir.resolve.calls.FirCallResolver.createResolvedNamedReference
• KT-80400 K2: AbstractMethodError on fun interface implementation inheriting from an interface compiled with -jvm-default=disable
• KT-9111 Improve diagnostic for call with access to outer class from nested class
• KT-78280 Implement the sourceless KtDiagnostics
• KT-74999 K2: KotlinNothingValueException within Extension Function
• KT-81254 "AssertionError: There should be at least one non-stub type to compute common supertype": Parser issue during generic type inference
• KT-53237 NI: Frontend ignores generic bound when inferring types
• KT-81186 Only allow local type aliases in REPL/scripts until full stabilization
• KT-80929 IC Native: Undefined symbols on ktor
• KT-81657 K2: put warning about "exposing package-private in internal" under experimental language feature
• KT-81241 Konanc exit while lowering org.jetbrains.kotlin.ir.util.IrUtilsKt.remapTypeParameters
• KT-74819 K2: False-positive overload resolution ambiguity for flatMap inside PCLA
• KT-81547 Stabilize DFA-based exhaustiveness
• KT-79274 Frontend implementation of name-based destructuring
• KT-79506 Contract for getter and setter doesn't work if a property is called from another module
• KT-58988 K2: Deprecate exposing package-private parameter of internal method
• KT-80711 IC Native: NPE during link on ktor
• KT-77727 Move some of the extra checkers to the default list
• KT-76136 Switch latest stable version in Kotlin project to 2.3
• KT-81257 Native: "Unexpected boolean predicate" when generating 'static_cache'
• KT-81525 Report REDUNDANT_SPREAD_OPERATOR on (*) instead of argument expression
• KT-81522 Fix Light Tree SPREAD_OPERATOR diagnostic positioning
• KT-77008 K2: Incorrectly force casting to a wrong type
• KT-78127 K2: Too precise inference for if/when with expected type in assignment
• KT-80208 K2: ClassCastException: "class java.util.ArrayList cannot be cast to class java.lang.Void" type inference picks Void for generic function
• KT-75797 Native: find a way to handle generates C bridges in inline functions
• KT-78819 K2: False positive ABSTRACT_MEMBER_NOT_IMPLEMENTED in KJK hierarchy
• KT-80003 Kotlin/Native: deprecate eager GlobalData initialization
• KT-79231 Inconsistent InnerClass entry flags for abstract inner enum
• KT-20677 Improve diagnostic about implicit default constructor absence for expected annotation class
• KT-81385 Missing error of nullable expression in class literal in case of reified type parameter
• KT-81251 Smartcast doesn't work for an effectively private inline function
• KT-81245 Automatic smart cast on properties with EBF is allowed on inlined property accessors
• KT-81222 Custom getter is allowed on a property with redundant EBF
• KT-80795 Wrong type cast is added for IMPLICIT_COERCION_TO_UNIT
• KT-81141 Fix FirUnsupportedArrayLiteralChecker to forbid array literals inside non-annotation contexts
• KT-81383 Return type of anonymous function used as run argument is incorrectly inferred to Nothing
• KT-80577 "Return type mismatch" for self-referential types used as generic parameters
• KT-75215 KDoc: references from @param tag are rendered as plain text
• KT-79887 K2 Compiler Internal Error in 'FirFakeOverrideGenerator.checkStatusIsResolved' Method
• KT-78125 false-negative shadowed contextual overload warning on local declarations
• KT-81198 Move type and type parameter annotations from jvm_metadata.proto to metadata.proto
• KT-81057 Wrong handling of boxing during redundant casts optimization
• KT-81191 K2: "null cannot be cast to non-null type ConeTypeParameterLookupTag" with invalid code
• KT-80285 IJ monorepo: broken compilation after 2.2.20-RC update
• KT-81115 Allow converting lambda with explicit parameter when assigning to variable of an extension function type
• KT-74588 Redundant checkNotNull intrinsics instructions for Java generic methods
• KT-78390 Unmute FusStatisticsIT.testKotlinxPlugins() after AtomicFU updates kotlin-metadata-jvm
• KT-79369 Forbid typealiasing for all compiler-required annotations
• KT-69294 K2: Report CONSTRUCTOR_OR_SUPERTYPE_ON_TYPEALIAS_WITH_TYPE_PROJECTION_ERROR instead of EXPANDED_TYPE_CANNOT_BE_INHERITED after switching to LV 2.2
• KT-81064 Wrong safe call null check handling during redundant casts optimization
• KT-80871 StackOverflowError on AnnotationTarget.TYPE
• KT-80908 K2: Compiling type annotation with self-annotated vararg fail with exception
• KT-81018 ISE "IR class for Foo not found" on missing dependency when lowering SAM constructor
• KT-80936 NON_PUBLIC_CALL_FROM_PUBLIC_INLINE : @PublishedApi doesn't work for fun interfaces
• KT-75748 StackOverflowError when reading array from metadata annotations
• KT-80606 KotlinIllegalArgumentExceptionWithAttachments when using property itself in explicit backing field initialization
• KT-80940 K2: Exception in FIR2IR with AnnotationTarget.TYPE with self-annotated non-vararg default argument and usage in child module
• KT-80538 KaFirDiagnostic.EmptyRange doesn't work in most of the cases
• KT-80524 Class is not abstract and does not implement abstract member when compiling with kotlinc-jklib
• KT-80597 Apply fix for CVE-2024-7254 to our fork of protobuf 2.6.1
• KT-80849 K2: ConstValueProviderImpl doesn't distinguish files with same name and package
• KT-80602 Exhaustiveness checker improvements for 2.3
• KT-80735 Support || return/throw shortcut in unsed return value checker
• KT-79651 Report a warning about an unused return value only on the function name
• KT-80719 False positive: "Redundant visibility modifier": when overriding protected methods as "public"
• KT-80434 K2: DSL marker doesn't work with lambda fields
• KT-80383 Getter without a body is allowed on a property with an explicit backing field
• KT-80446 Explicit visibility modifiers are allowed on EBF
• KT-80378 ClassCastException on callable reference to a property with EBF
• KT-80377 Fir2Ir: "Cannot determine expected receiver type" for callable reference to a property with EBF outside of class
• KT-80455 K2: StackOverflowError in when exhaustiveness checker on red code
• KT-72862 [Native caches] Umbrella for failing codegen/box tests for corner cases in synthetic accessors
• KT-20278 NO_TYPE_ARGUMENTS_ON_RHS: Confusing diagnostic for inner class of generic outer class
• KT-80418 Property with EBF with functional type isn't resolved if its type is Any
• KT-80469 Functional type from property is always used for explicit backing field
• KT-80535 Missing INITIALIZER_TYPE_MISMATCH for EBF
• KT-80445 Private visibility is possible for a property with EBF
• KT-80164 Move name generation for unnamed context parameters to frontend
• KT-80684 Line breaks are lost in multi-line diagnostic messages since 2.3.0
• KT-78112 RETURN_VALUE_NOT_USED is reported for local function even if it isn't marked with annotation in CHECKER mode
• KT-48311 Incorrect LINENUMBER after if with a suspend call
• KT-80688 Bad SourceDebugExtension caused by enhanced coroutines debugging
• KT-73851 Native: compilation fails with ClassCastException with genericSafeCasts=true
• KT-77593 Add a warning when @IgnorableReturnValue is inconsistent between expect/actual functions
• KT-79386 Confusing error message when named parameters are used for java method calls
• KT-80600 K2: Private and final modifiers are allowed on setter of open delegated property
• KT-77101 Invoke on callable reference is considered ignorable
• KT-79923 Remove lookup of @IgnorableReturnValue annotation from FirReturnValueOverrideChecker
• KT-80517 Synthetic kotlin.Any members in data classes are missing @MustUseReturnValue
• KT-80194 VAR_TYPE_MISMATCH_ON_OVERRIDE: doesn't mention the inferred type
• KT-80484 K2: ClassCastException due to fake source for implicit lambda parameter (RedundantNullableChecker)
• KT-80592 UninitializedPropertyAccessException when anayzing annotations on members of anonymous classes
• KT-80399 Anonymous Kotlin class incorrectly warns about deprecated java override despite '@Deprecated' annotation
• KT-79610 Adding CocoaPod to Kotlin/Native MPP triggers IR serialization failure and commonizer errors
• KT-79951 Infinite loop in parsing incomplete full form destructuring
• KT-79866 kotlinc 2.2.0 silently emits 'NonExistentClass' instead of reporting an error
• KT-79777 Argument type mismatch on value of complex type with a captured raw type argument
• KT-78664 False positive VARIABLE_NEVER_READ and ASSIGNED_VALUE_IS_NEVER_READ on function type variable with splited declaration and assignment
• KT-79496 False positive "when must be exhaustive" in triangle interface/class hierarchy
• KT-79774 KtDestructuringDeclaration.getLPar & getRPar are broken
• KT-80391 K2: Only one context parameter is mentioned in the [NO_CONTEXT_ARGUMENT] diagnostic
• KT-79785 ktypew:kotlin.collections.List already exists error using Swift Export
• KT-78879 "Sealed types cannot be instantiated": Can't instantiate Java-defined sealed Class from Kotlin
• KT-21598 Extension is shadowed by member should not be reported when member is deprecated with HIDDEN level
• KT-79622 FUNCTION_EXPECTED: Misleading 'expression cannot be invoked as a function' when inaccessible with private lambda
• KT-80255 [EXTENSION_FUNCTION_IN_EXTERNAL_DECLARATION] can be attached to the receiver type of a functional type
• KT-79816 Java Interfaces implemented by delegation have non-null return checks
• KT-80177 Improve message of RECEIVER_SHADOWED_BY_CONTEXT_PARAMETER in case of member extension
• KT-79770 There is no RECEIVER_SHADOWED_BY_CONTEXT_PARAMETER if the usage of fun is from inside the class
• KT-79430 False positive EXTENSION_SHADOWED_BY_MEMBER on overridden member extension
• KT-62934 Incorrect line mapping inside inline lambda after non-local return
• KT-79545 K2: no error on crossinline lambda usage in anonymous object base constructor call
• KT-79643 HAS_NEXT_FUNCTION_AMBIGUITY and NEXT_AMBIGUITY diagnostics are always ignored in favor of HAS_NEXT_FUNCTION_NONE_APPLICABLE and NEXT_NONE_APPLICABLE
• KT-79327 Modifier 'private' is not applicable to 'value parameter' is reported for context parameters
• KT-76453 K2 IDE: autocomplete freeze
• KT-77182 A function in a file annotated with @file:MustUseReturnValue doesn't produce a warning when it is used from compiled code
• KT-78541 Jspecify: Unsound platform type despite @NullMarked for an override with a generic-subclass return type
• KT-79672 'when expression must be exhaustive' even after using 'require()'
• KT-71306 K2 IDE / Kotlin Debugger: “Cannot find local variable 'block' with type kotlin.jvm.functions.Function0” on evaluating lambda arg inside inline function
• KT-76991 K2 IDE / Kotlin Debugger: ISE “Couldn't find declaration file for” on evaluating local fun when the scope has also inline fun from another file call
• KT-79877 K2 IDE / Kotlin Debugger: failed evaluations of a code fragment capturing local data class
• KT-77401 [FIR] ParameterNameTypeAttribute.name doesn't support @ParameterName with compile-time constant property argument
• KT-79682 Fix partially uninitialized locals after coroutine spills insertion
• KT-79562 NPE when passing non-lambda argument of nullable non-suspend function type into function that accepts nullable suspend function type
• KT-79693 NotImplementedError: An operation is not implemented: Unknown file with KMP separate compilation
• KT-79662 Unused return value checker doesn't work for com.google.errorprone.annotations.CheckReturnValue
• KT-79781 Missing MISSING_DEPENDENCY_CLASS when using type alias with inaccessible RHS
• KT-77772 Only report exposed type on qualifier if it's resolved to an object
• KT-79765 K2. Do not report ignore return value for unresolved reference
• KT-79017 False negative REDECLARATION on private nested class
• KT-79519 Nested type alias is unreachable from another module
• KT-72039 StackOverflowError on calling keySet on a Kotlin subclass of Java subclass of ConcurrentHashMap
• KT-75843 K2: incorrect line numbers in an if-expression with a super-call
• KT-77504 Add a warning when @IgnorableReturnValue is inconsistent on overrides
• KT-78389 Perform version 2.3 boostrapping
• KT-79092 Crash on default argument in function in fun interface
• KT-77729 Package-level @NullMarked does not work when kotlinc sees .java source files
• KT-79013 False negative NOT_YET_SUPPORTED_IN_INLINE on inline local functions inside inline functions
• KT-79139 False positive CONFLICTING_OVERLOADS for context parameters instead of receivers
• KT-35305 Address the overload conflict resolution between unsigned and non-primitive types
• KT-42096 No diagnostic reported on inline modifier on an enum entry
• KT-79355 Failed to fix the problem of desugared inc with new reverse implies returns contract
• KT-79277 Implies returns contract doesn't affect the return type of the function if it is in the argument position
• KT-79271 Implies returns contract doesn't impact exhaustiveness
• KT-79218 SMARTCAST_IMPOSSIBLE for top‑level extension‑property getter despite returnsNotNull contract
• KT-79220 returnsNotNull contract ignored on extension function with nullable receiver
• KT-79354 IllegalStateException: Debug metadata version mismatch. Expected: 1, got 2 with compiler 2.2.20-Beta1 and stdlib 2.2.0
• KT-77986 K2: False negative: "Local classes are not yet supported in inline functions"
• KT-79456 Redeclaration conflict checks of private top-level classifiers rely on an incorrect containing file
• KT-79125 RVC full mode: delegated interfaces are not checked
• KT-63720 Coroutine debugger: do not optimise out local variables
• KT-78595 type variable leak on a generic property as a call argument given an unstable smart cast
• KT-79076 'IllegalStateException: Cannot serialize error type: ERROR CLASS: Uninferred type' with Exposed column using recursive generic type
• KT-59807 K2: Replicate the MUST_BE_LATEINIT logic from K1
• KT-76782 K2: Incorrect resolve into unrelated invoke operator with wrong diagnostic
• KT-78066 TYPE_PARAMETER_OF_PROPERTY_NOT_USED_IN_RECEIVER error message does not account for context parameters
• KT-76065 Drop JavaTypeParameterDefaultRepresentationWithDNN feature
• KT-77808 Inference: recheck the code about DNN-related hacks
• KT-24202 NOTHING_TO_OVERRIDE if super-class reference misses generic arguments
• KT-78909 K2: Missing diagnostics [CYCLIC_INHERITANCE_HIERARCHY] for recursive class inheritance leads to StackOverflowError
• KT-75969 java.lang.IllegalArgumentException: source must not be null on red code
• KT-76902 Omit type-use annotations from diagnostics
• KT-17460 Diagnostics and intention on suspend function that is overriden with non-suspend one.
• KT-56665 K2: false positive RECURSIVE_TYPEALIAS_EXPANSION
• KT-78932 Contracts are allowed for open and overridden property accessors
• KT-77203 FIR: Consider adding destructured type to all COMPONENT_FUNCTION_* diagnostics
• KT-77685 "IllegalArgumentException: Sequence contains more than one matching element"
• KT-78452 Drop redundant frontend structures after fir2ir conversion
• KT-70507 Should parentheses prevent from plus/set operator desugaring?

Compose compiler

New features

• 98d3907 Introduce a compose group analysis module that produces a proguard/R8 mapping from group keys in bytecode.

Fixes

• b/419049140 Disabled memoization in try blocks
• KT-81081 Generate Compose-specific proguard mappings when Compose compiler plugin is applied.
• b/431025881 [Compose] Clean up runtime version checker
• b/365922168 Add java.util.Locale to the list of known stable classes
• b/407549020 Introduce a registry of known stable markers
• b/417989445 Added a diagnostic to restrict usages of runCatching in @Composable functions
• KT-80294 Fix crash with inline @Composable function reference
• b/430140896 Fix IrSourcePrinter output for when branch check and typechecks
• CMP-9167 iOS: Platform declaration clash: The following functions have the same IR signature

IDE. Gradle Integration

• KT-46273 MPP: Don't fail import for case of missed platform in source set structure
• KT-46417 [UNRESOLVED_REFERENCE] For project to project dependencies of native platform test source sets
• KT-44845 After update to Kotlin 1.4.30 all external dependencies is unresolved in IDE with kotlin.mpp.enableGranularSourceSetsMetadata=true
• KT-46142 K/N distribution is unavailable from IDE with multiplatform hierarchical project structure enabled

IR. Actualizer

• KT-77337 IrNoExpectSymbolsHandler finds expect class reference after enabling annotation traversal in IR
• KT-80002 Investigate the need for map copying in IrCommonToPlatformDependencyExtractor.kt
• KT-80131 KMP Separate Compilation: No override for FUN IR_EXTERNAL_DECLARATION_STUB name:<get-size>
• KT-80064 KMP Separate Compilation: ClassCastException: class org.jetbrains.kotlin.ir.symbols.impl.IrTypeAliasSymbolImpl cannot be cast to class org.jetbrains.kotlin.ir.symbols.IrClassSymbol
• KT-80051 KMP Separate Compilation: Actualization of common dependencies failed on 'PROPERTY FAKE_OVERRIDE name:modCount visibility:protected modality:FINAL [fake_override,var]'
• KT-79998 KMP Separate Compilation: java.lang.IllegalStateException: No override for FUN IR_EXTERNAL_DECLARATION_STUB name:<get-message>

IR. Inlining

New Features

• KT-70360 KLIBs: Uniformly handletypeOf() calls at 1st/2nd stages of compilation

Performance Improvements

• KT-69497 Crossinline lambda is allocated on K/N & JS

Fixes

• KT-78673 Make fakeOverrideLocalGenericBase not using red code
• KT-78537 [Inliner] Incorrect KFunction.name of a reference to inlined local function
• KT-74892 Investigate passing inline lambda as argument of another inline function
• KT-81673 False warnings about ABI change in dependencies in library mode in 2.3.0-Beta1
• KT-81713 [Inliner] Compilation of inline function with recursive call applied to TODO() fails with an internal error
• KT-80653 [IR Inliner] Space: "Local declarations should've been popped out by this point"
• KT-78392 CommonPrefix: Add a way of stopping execution when one of the phases is unsuccessful
• KT-80927 [Native] Review intrinsics with PublishedApi
• KT-81070 [Inliner] kotlin/Any is unbound
• KT-80628 KLIB inliner: Not enough information about the "full" mode
• KT-69516 Double-inlining for Native: Enable visibility checks after 1st phase of inlining
• KT-79334 Unify intrinsics used on 1st phase of IR inliner in KLIB-based compilers
• KT-80610 KLIB inliner: Always apply cross-module inlining to pre-processed inline functions
• KT-80565 KLIB Inliner: Add a special annotation to prohibit inlining of marked inline functions in stdlib on 1st compilation phase
• KT-80883 [Inliner] Run pre-serialization lowerings in all testrunners
• KT-77876 IrVisibilityChecker: Different set of exceptions for 1st and 2nd compilation stages
• KT-80693 [IC] Split IC invalidation tests for cross-module IR Inliner
• KT-79718 KLIB inliner: Emit warning on generation of public synthetic accessor when running in "explicit API mode"
• KT-80226 [IR Inliner] Generate constructor accessors as constructors, not static functions
• KT-80692 [IC] Split IC invalidation tests for intra-module IR Inliner
• KT-77103 [Inliner] IrLocalDelegatedProperty was not serialized, while its symbol and IrRichPropertyReference were.
• KT-80537 The expected error is not emitted from FirJsKlibSyntheticAccessorsTestGenerated and NativeKlibSyntheticAccessorsTestGenerated
• KT-78903 Unify codegen/boxInline tests with codegen/box
• KT-78989 Add missing PL tests for inline functions/property accessors
• KT-79771 kotlinx-coroutines-core: Public synthetic accessor generated with enabled KLIB IR inliner
• KT-79680 IrConstructorSymbolImpl is unbound in lambdaWithoutNonLocalControlflow.kt
• KT-70849 Ensure correct debug info for intra-module IR inlining on the first compilation phase
• KT-79800 JS BE errors with default values when IR inliner is enabled
• KT-79352 Remove excessive validations from ValidateAfterAll... on the first stage
• KT-76599 Migrate IrValidationAfterInliningAllFunctionsPhase to the first stage of compilation
• KT-78245 Synthetic Accessors incorrectly copies default values
• KT-72594 [JS][Native] Add IrInliningFacade to test runners

IR. Interpreter

• KT-72356 K2 Native: IllegalStateException when annotation has the same source range as a constant in another file
• KT-72881 K2: incorrect empty array as annotation argument when parameter has default value

IR. Tree

Fixes

• KT-79371 Fix handling of broken SAM conversion in PL with enabled Rich References
• KT-81952 "IllegalStateException: Callable reference with vararg should not appear at this stage" for callable references to functions with generic vararg parameters
• KT-79739 Static synthetic accessors inside generic classes access its type parameters
• KT-78100 Track and annotate internal annotations with @PublishedApi to enable annotation visibility validation
• KT-80825 Drop IrSerializationSettings.reuseExistingSignaturesForSymbols setting
• KT-79807 Broken IR tree invariants in IrReplSnippet after FIR2IR
• KT-77819 [IR] Fine-tune IrValidator's run after Fir2IR and IR plugins
• KT-70160 Remove IrDeclaration.parents after Anvil update
• KT-80454 LocalDeclarationsLowering: Clean-up the dead code
• KT-80819 Rework IrFileValidator to use Hashmap instead of ClassValue
• KT-80516 Kotlin-like IR dump: Don't render tailrec as lateinit
• KT-78856 Refactor LocalDeclarationsLowering to split it in smaller parts
• KT-79439 KLIB stdlib symbols loading: Split the result of merging of IrBuiltins with BuiltinSymbolsBase hierarchy into two parts (for 1st & 2nd phases)
• KT-79437 KLIB stdlib symbols loading: Drop loading functions from IrBuiltins and migrate usages to SymbolFinder functions and lazy filtering
• KT-79569 Unexpected error during DFG phase in Native due to PL issue with SAM conversion represented by rich reference
• KT-76601 IrValidatorConfig should have all checks disabled by default
• KT-69662 Deduplicate function createTemporaryVariable
• KT-79440 KLIB stdlib symbols loading: Drop BuiltinSymbolsBase from plugin API
• KT-78960 [FO] Limit static fake overrides generation for static functions
• KT-76813 IR validator: not all symbols/references are visited

JVM. Reflection

• KT-79020 Suspend lambdas return type is shown as ??? in reflection
• KT-81967 isSubtypeOf: ClassCastException: CapturedKType cannot be cast to class AbstractKType
• KT-76521 Reflection: change KType representation to avoid dependency on K1
• KT-81619 Reflection: Function supertype of a FunctionN class has flexible type in new implementation
• KT-74529 Context parameters support in reflection
• KT-80901 Reflection: incorrect translation of raw types in the new implementation
• KT-74624 Reflection: KClassifier.createType(...) ignores annotations parameter
• KT-80203 Reflection: provide a way to use legacy K1-based implementation
• KT-80236 Reflection: KType.toString for raw types no longer renders "(raw)"
• KT-79206 Reflection: suspend functional type classifier is null

JavaScript

New Features

• KT-80401 Kotlin/JS support for default export in generated JavaScript
• KT-79284 Use BigInt64Array for LongArray
• KT-79222 K/JS: Allow using Long in exported declarations
• KT-79394 Add the possibility to write common external declarations between JS and WasmJS targets

Performance Improvements

• KT-57128 KJS: Use BigInt to represent Long values in ES6 mode

Fixes

• KT-79928 Allow JsModule/JsNonModule/JsQualifier invocation on per-entity level
• KT-79514 java.lang.IllegalStateException: IrClassSymbolImpl is unbound. Signature: kotlin.js/Promise|null[0] on running jsBrowserTest
• KT-82005 KJS: "TypeError: callAgent.jsonRpcCall_ij3z26_k$ is not a function" after code change in 2.3.0-Beta1/2
• KT-79359 Kotlin/JS: Suspending function doesn’t return Unit on es2015
• KT-79089 KJS: Could not load reporter / Cannot find module 'mocha' when running jsNode tests
• KT-56281 KJS: Can't export suspend functions
• KT-79926 Wrong export of interfaces with companions with ES Modules
• KT-80168 Allow @JsStatic inside interface companions
• KT-70222 Remove legacy JS BE-related CLI flags
• KT-81424 Kotlin/JS: Cannot Get / in a simple running application
• KT-80873 KJS: Stdlib requires ES2020-compatible JS engine due to BigInt type literal
• KT-81066 Wasm, JS: Remove redundant logging in compiler output
• KT-72833 KJS: Source maps have incorrect sources paths in per-file
• KT-74055 KJS: @JsPlainObject adds JS code even if marked interface is not used
• KT-72474 KJS: @JsPlainObject doesn't honour -XXLanguage:+JsAllowInvalidCharsIdentifiersEscaping
• KT-79644 BigInt enabled for ES 2015 despite being an ES 2020 feature
• KT-52771 KJS: Pair should be exported to JavaScript
• KT-79704 Unify variance rendering between JS and other backends
• KT-69297 Deprecate referencing inlineable lambdas in js() calls
• KT-80086 [k/js] Resolving imported string literals
• KT-79066 [Kotlin/JS] jsNodeTest fails with SyntaxError when a test file has @file:JsExport and useEsModules() is enabled
• KT-77385 Investigate partial linkage problems for JS HMPP tests
• KT-79628 Remove IR nodes from ExportModel
• KT-79916 K/JS: "Uncaught TypeError" when using 'Xes-long-as-bigint' in compose-html
• KT-79050 KJS / IC: "Unexpected body of primary constructor for processing irClass"
• KT-79977 KJS: Long.rotateLeft returns incorrect result when BigInts are enabled
• KT-78831 AbstractFunctionReferencesLowering: fragile fake override generation
• KT-52230 KSJ IR: Applying identity equality operator to Longs always returns false
• KT-6675 KotlinJS: toInt() on external Long throws error
• KT-79184 K/JS: Further intrinsify BigInt-backed Long operations

Klibs

New Features

• KT-80761 K2: [K/N] Should reported klib usage include inheritance

Performance Improvements

• KT-80861 [Klib] Deduplicate IrFileEntry.name
• KT-80866 [Klib] Optimize size of IrFileEntry.line_start_offset
• KT-80438 Uncached KlibMetadataClassDataFinder.findClassData

Fixes

• KT-64237 Klib metadata: migrate to using the common annotations instead of klib-specific extensions in the compiler
• KT-80099 KLIB resolver: Could not find file because of missing klib extension in resolved symlink path
• KT-80999 Reuse existing IrKotlinLibraryLayout in KotlinLibrary for reading pre-processed functions
• KT-80290 Remove if and TODO in countInAsInlinedLambdaArgumentWithPermittedNonLocalReturns
• KT-80298 K/N: one-stage compilation is broken
• KT-79958 KLIB tool fails to render IR if there is IrErrorType in a lirbrary
• KT-75241 Move ExperimentalLibraryAbiReader to a publishable artifact
• KT-76260 Make IrRichCallableReferencesInKlibs lang feature stable in LV=2.3
• KT-61552 [PL] IndexOutOfBoundsException in SAM conversion with substituted function
• KT-74417 Deduce the metadata version based on LV in KLIB-based backends
• KT-75980 [Klib] Reduce serialized size of IrFileEntries for sparse usage of another source files
• KT-73826 Deduplicate IrFileEntry that is serialized inside IrInlinedFunctionBlock

Language Design

• KT-76926 Allow return in expression bodies if return type is specified explicitly
• KT-78866 Show an error for implicit receiver shadowed by context parameter
• KT-81561 Update nested type aliases KEEP to reflect local type aliases support
• KT-81015 Stabilize nested type aliases
• KT-32619 JS: return Promise when continuation is not provided
• KT-78976 Decide if K2 should support local functions inside of local inline functions
• KT-79308 Ability to actualize empty interfaces as Any
• KT-48872 Provide modern and performant replacement for Enum.values()
• KT-28850 Prohibit protected visibility in final expected classes

Libraries

New Features

• KT-81092 Uuid: support generation of version 7 uuids with a given timestamp
• KT-78463 Annotate wasm and JS targets of kotlin-stdlib with @IgnorableReturnValue when appropriate
• KT-74444 EnumEntries type should implement RandomAccess
• KT-78462 Annotate kotlin-stdlib-jvm with @IgnorableReturnValue where appropriate

Performance Improvements

• KT-72111 Change Duration.parseOrNull logic to not throw exceptions internally

Fixes

• KT-82901 Long.MIN_VALUE.milliseconds produces invalid denormalized Duration
• KT-81995 K/N: CMP: Undefined symbol _kfun:kotlin.time.Duration.kotlin.time.Duration
• KT-56822 Deprecate Number.toChar() with error deprecation level
• KT-81078 Increase kotlin.io.createTempDir and createTempFile deprecation level to ERROR
• KT-74493 Deprecate String.subSequence(start, end) with error and drop it in the future
• KT-79192 Increase InputStream.readBytes(Int) deprecation level to HIDDEN
• KT-80778 Stabilize kotlin.time.Clock and kotlin.time.Instant
• KT-81043 String.toBigDecimalOrNull rejects strings accepted by String.toBigDecimal
• KT-81477 Uuid.Companion.generateV* are missing SinceKotlin annotation
• KT-81478 FileTreeWalkTest.withDirectoryFilter fails on Windows
• KT-74411 Introduce Uuid.generateV4() and generateV7()
• KT-80530 Annotate Kotlin/Native stdlib with must-use value/@IgnorableReturnValue when appropriate
• KT-79791 Duration.parse incorrectly handles negative decimal seconds in ISO-8601 format
• KT-80619 [KLIBs] Enable intra-module inliner in stdlib & kotlin-test
• KT-76773 stdlib: contextOf's type argument can be inferred via contextOf's context argument
• KT-71822 Intersection with (subtraction from) an identity set may produce incorrect results
• KT-80431 Remove suppression of "ACTUAL_ANNOTATIONS_NOT_MATCH_EXPECT" from stdlib
• KT-80605 Rename MustUseReturnValue -> MustUseReturnValues
• KT-69947 KLIB stdlib: All intrinsics that can be used in KLIBs with inlined IR must be included in stdlib ABI dump
• KT-59044 Improve various aspects of TimeSource documentation
• KT-80544 Mark controversial path extensions (like .deleteRecursively()) as ignorable
• KT-80603 K/N and K/Wasm: \p{N} category is not supported
• KT-80661 ArrayDeque.lastIndexOf may return -1 for an element present in the deque
• KT-80390 ArrayDeque.indexOf(null) wrongly returns 0 after removals
• KT-79094 Change signature of assertFailsWith or make lambda excluded otherwise
• KT-72028 Incorrect parameters order in IndexedValue documentation
• KT-80130 [stdlib] Commonize AssociatedObjects in commonNonJvmMain
• KT-80107 [stdlib] Move CancellationException to commonNonJvmMain
• KT-80179 Investigate why StringBuilder.length is not enhanced automatically
• KT-80046 Increase test coverage of Duration.parse[IsoString][OrNull] methods
• KT-76459 Remove comments about sorting stability in unsigned-type arrays
• KT-79489 Generate Stdlib API reference for webMain source set
• KT-78243 Drop JS- and Wasm-specific IrLinkageError classes
• KT-79108 Remove the default argument for linkageError from kotlin.js.getPropertyCallableRef
• KT-79130 K/JS: Remove bodies from intrinsified Long methods
• KT-79239 K/Wasm: elementAt extension function of Array/PrimitiveArray/UnsignedArray does not throw IndexOutOfBoundException on incorrect index
• KT-79256 K/Wasm: MatchResult.groups raises a trap on invalid group index
• KT-57317 Repack EnumEntries from stdlib into the compiler

Native

• KT-80620 Bump minimal iOS and tvOS supported versions to 14.0
• KT-80624 Bump minimal watchOS supported versions to 7.0
• KT-79384 K/N: Application Not Responding: Thread Deadlock
• KT-80536 Native: DependencyDownloader seems to have no timeout

Native. Build Infrastructure

• KT-80147 Set proper LV and AV for kotlin-native/performance/buildSrc
• KT-79474 Kotlin/Native: fix breakpad build
• KT-79215 Kotlin/Native: fix distInvalidateStaleCaches on windows

Native. C and ObjC Import

• KT-79752 Native: make cinterop generate CCall.Direct annotations
• KT-79753 Native: support CCall.Direct calls in the compiler
• KT-81312 Native: when -Xccall-mode direct is used, mark unsupported declarations with unresolvable symbol name instead of @Deprecated(ERROR)
• KT-79571 Xcode 26 beta 4: CInteropKT39120TestGenerated.testForwardEnum failed
• KT-80838 Cinterop fails with an error when Compilation works fine
• KT-49034 Kotlin/Native: cnames.structs.Foo resolves into wrong declaration

Native. ObjC Export

• KT-81906 Normalize CFBundleIdentifier when producing Apple framework
• KT-78810 [ObjCExport] Enable explicit ObjC block parameter names by default
• KT-80271 ObjC/Swift Export: Remove Native platform Cloneable checks
• KT-78604 Consider not inheriting KlibScope from KaScope
• KT-79767 ObjCExport: private companion must not be exposed
• KT-79724 ObjCExport: extensions order
• KT-79548 ObjCExport: mangling difference between K1 and K2 when translating KotlinDurationCompanion
• KT-79475 ObjCExport: invalid property getter translation
• KT-79346 ObjCExport: Any method overrides
• KT-78871 ObjCExport: translation of keyword release with parameter generates invalid header

Native. Runtime. Memory

• KT-75918 Native: Deprecate -Xallocator=std
• KT-80678 Native: pagedAllocator=false sweep is slow
• KT-75916 Native: Enable sanitizer support with pagedAllocator=false

Native. Swift Export

Fixes

• KT-81355 Swift Export: Introduce a flag to turn off coroutines export
• KT-80969 Swift Export: Call suspend function as async on swift side
• KT-80111 Swift Export Build Fails Due to Errors in KotlinStdlib.swift
• KT-80884 Swift Export: support async in SIR
• KT-80185 Swift Export: IllegalArgumentException – Collection contains more than one matching element
• KT-79889 K/N: swift-export fails under several different conditions
• KT-79518 Swift export: represent kotlin.Any as swift.any
• KT-78603 Do not inherit SirAndKaSession from KaSession
• KT-79227 Swift Export: Fix First Release Issues
• KT-79521 '_CoroutineScope' is inaccessible due to 'internal' protection level
• KT-79181 Swift Export Fails When Using T: Comparable<T> Generic Constraint in Kotlin Classes

Tools. Ant

• KT-75875 Remove Ant support

Tools. BCV

• KT-80313 Add ability to generate dump from jar files [ABI Tools]

Tools. Build Tools API

New Features

• KT-78194 BTA: port the JVM prototype to the new design
• KT-79409 BTA: Support removed compiler arguments properly
• KT-78193 BTA: Implement core infrastructure according to the new design
• KT-78196 BTA: implement API adapter for the prototype implementation
• KT-77999 BTA: Generate BTA options from compiler arguments descriptions

Fixes

• KT-75357 CompilationService.loadImplementation(loader) Expects a ClassLoader, but Fails if its not a URLClassLoader
• KT-73090 Gradle 8.11 kotlin compilation fails when run with -Pkotlin.compiler.runViaBuildToolsApi=true
• KT-81321 Deprecate old BTA prototype API
• KT-81602 BTA: rename KotlinToolchains.jvm `@JvmNam

Note truncated.

Changelog

Compiler

• KT-82869 Green-to-Red change in 2.3 after prioritizing non-suspend-function-type overloads

Libraries

• KT-82901 Long.MIN_VALUE.milliseconds produces invalid denormalized Duration

Changelog

Compiler

• KT-82590 ClassCastException when instantiating class with generics implemented by fun interface and lambda

Tools. Compiler Plugin API

• KT-82563 Improve compiler error messages to identify incompatible plugins causing compilation failures

Changelog

Backend. Wasm

• KT-82075 K/Wasm: kotlin.wasm.internal.getSimpleName crashes on iOS Safari older than 26

Compiler

• KT-82138 Debugger: Cannot evaluate JvmInline value class parameter
• KT-78413 Kotlin Debugger: value classes as context parameters have incorrect names in Variables View during debugging
• KT-80549 Call of Java method with type parameter bounds: Expected FirResolvedTypeRef with ConeKotlinType but was FirJavaTypeRef
• KT-82132 False-positive type mismatch with -language-version 2.2
• KT-81988 K2: Any?.toString() causes NPE inside lambda with Java
• KT-82022 K/N: Unexpected "Annotation @JvmInline is missing on actual declaration" warning with value classes

Compose compiler

• CMP-9167 iOS: Platform declaration clash: The following functions have the same IR signature

IR. Actualizer

• KT-77337 IrNoExpectSymbolsHandler finds expect class reference after enabling annotation traversal in IR

IR. Tree

• KT-81952 "IllegalStateException: Callable reference with vararg should not appear at this stage" for callable references to functions with generic vararg parameters

JVM. Reflection

• KT-81967 isSubtypeOf: ClassCastException: CapturedKType cannot be cast to class AbstractKType
• KT-81619 Reflection: Function supertype of a FunctionN class has flexible type in new implementation

JavaScript

• KT-82005 KJS: "TypeError: callAgent.jsonRpcCall_ij3z26_k$ is not a function" after code change in 2.3.0-Beta1/2
• KT-79514 java.lang.IllegalStateException: IrClassSymbolImpl is unbound. Signature: kotlin.js/Promise|null[0] on running jsBrowserTest

Libraries

• KT-81995 K/N: CMP: Undefined symbol _kfun:kotlin.time.Duration.kotlin.time.Duration
• KT-72111 Change Duration.parseOrNull logic to not throw exceptions internally

Tools. Compiler Plugin API

• KT-82099 Compiler plugin ordering has no effect

Tools. Gradle

• KT-79482 Report webMain / webTest usage in FUS metrics
• KT-82244 Conflicting warnings when using AGP 9.0.0-alpha with built-in Kotlin disabled
• KT-82068 Workaround iOS Simulator start failure in IT
• KT-81161 Gradle plugin api reference: compiler arguments types are not available

Tools. Gradle. Multiplatform

• KT-81601 With android.builtInKotlin=false AGP 9.0+, using kotlin-multiplatform plugin will fail with aClass Cast Exception
• KT-81980 KGP warning gives incorrect suggestion for AGP application compatibility

Tools. Gradle. Native

• KT-81510 commonizeCInterop exception with 'kotlinNativeBundleConfiguration' not found

Tools. Maven

• KT-82180 kotlin-maven-plugin: IC succeeds after dependent source deletion

Tools. Wasm

• KT-82365 K/Wasm: NodeRun tasks in Wasi depend on kotlinWasmToolingSetup

Changelog

Analysis API

• KT-80082 K2. False positive "Cannot resolve method" for self-bounded generic with wildcard return type in Java interop

Analysis API. Code Compilation

• KT-70860 K2 IDE / Kotlin Debugger: CCE “java.lang.String cannot be cast to java.lang.Void” on evaluating not-null variable on the line with assigning null to that var

Analysis API. FIR

• KT-81378 Expected expression 'FirFunctionCallImpl' to be resolved caused by suspend {}
• KT-80473 Add events for tracking LL activities

Analysis API. Providers and Caches

• KT-81476 Analysis API: AlreadyDisposedException from low-memory cache cleanup
• KT-80911 Analysis API: Execute session invalidation in a non-cancelable section
• KT-81242 Analysis API: Add UUID/lifetime properties to LL FIR session structure logging
• KT-80622 Analysis API: Visualise LL FIR session structure & weight
• KT-80904 Analysis API: "Invalid dangling file module" exception during session invalidation
• KT-78882 K2 AA: Calling containingSymbol on getProgressionLastElement causes exception

Analysis API. Standalone

• KT-81108 AA: java.lang.ClassCastException: class org.jetbrains.kotlin.fir.FirBinaryDependenciesModuleData cannot be cast to class org.jetbrains.kotlin.analysis.low.level.api.fir.projectStructure.LLFirModuleData

Analysis API. Stubs and Decompilation

• KT-77097 Support ReplaceWith deprecation annotation argument via stubs

Analysis API. Surface

New Features

• KT-80084 Provide endpoints for Analysis API to understand when the context sensitive resolution is used

Fixes

• KT-81132 Use KaSession instead of a particular KaSessionComponent for context parameter bridges
• KT-81129 K2: KaSymbolInformationProvider#importableFqName: should return null for dynamic declarations
• KT-81128 K2: KaSymbolInformationProvider#importableFqName: should return null for error destructuring declarations
• KT-81127 K2: KaSymbolInformationProvider#importableFqName: should return null for anonymous functions
• KT-81126 K2: KaSymbolInformationProvider#importableFqName: should return null for enum entry initializer constructors
• KT-81125 K2: KaSymbolInformationProvider#importableFqName: should return null for property accessors
• KT-81124 K2: KaSymbolInformationProvider#importableFqName: type alias constructor should have a reference to the type alias and not to the underlying class
• KT-70127 Analysis API: 'KaFirReceiverParameterSymbol' does not implement 'KaFirSymbol'; leads to exception from importableFqName
• KT-81123 Reimplement KaFirSymbolInformationProvider#importableFqName
• KT-81122 Drop KaImportOptimizer
• KT-79772 Migrate from 'validityAsserted' to 'withValidityAssertion'
• KT-59857 KaExpressionTypeProvider#returnType shouldn't throw an exception for class like declarations

Backend. Wasm

• KT-79244 [Wasm] Drop K1-specific tests, testrunners and test directives
• KT-80397 K/Wasm: turn on by default using a new version of the exception handling proposal for wasm-wasi target
• KT-76204 K/Wasm: support generating a wasm module per kotlin module/klib
• KT-81372 K/Wasm: JsException: Exception was thrown while running JavaScript code on Safari 18.2/18.3
• KT-80106 devServer in Kotlin/Wasm overwrites defaults, causing missing static paths

Compiler

New Features

• KT-80837 Warn about extension function with a context shadowed by member
• KT-80031 Check spotbugs's @CheckReturnValue in Kotlin's unused return value checker

Performance Improvements

• KT-81617 Native: casts optimizations pass explodes on deep nested loops
• KT-81340 K/N: severe compilation time degradation after turning on casts optimization pass
• KT-52283 Never ending type inference while compiling Kotlin code with lots of self pointing generics

Fixes

• KT-81618 "Number of arguments should not be less than number of parameters" on JVM on Kotlin 2.3.0-Beta1
• KT-81652 Native: ClassCastException: ApplicationForegroundStateListener.Companion
• KT-74999 K2: KotlinNothingValueException within Extension Function
• KT-81254 "AssertionError: There should be at least one non-stub type to compute common supertype": Parser issue during generic type inference
• KT-80250 ISE: flow for PostponedLambdaExitNode not initialized - traversing nodes in wrong order?
• KT-81186 Only allow local type aliases in REPL/scripts until full stabilization
• KT-80929 IC Native: Undefined symbols on ktor
• KT-81657 K2: put warning about "exposing package-private in internal" under experimental language feature
• KT-81241 Konanc exit while lowering org.jetbrains.kotlin.ir.util.IrUtilsKt.remapTypeParameters
• KT-74819 K2: False-positive overload resolution ambiguity for flatMap inside PCLA
• KT-79506 Contract for getter and setter doesn't work if a property is called from another module
• KT-71420 Report error when reified type parameter is inferred to intersection type
• KT-77727 Move some of the extra checkers to the default list
• KT-81257 Native: "Unexpected boolean predicate" when generating 'static_cache'
• KT-81525 Report REDUNDANT_SPREAD_OPERATOR on (*) instead of argument expression
• KT-81522 Fix Light Tree SPREAD_OPERATOR diagnostic positioning
• KT-77008 K2: Incorrectly force casting to a wrong type
• KT-78127 K2: Too precise inference for if/when with expected type in assignment
• KT-80208 K2: ClassCastException: "class java.util.ArrayList cannot be cast to class java.lang.Void" type inference picks Void for generic function
• KT-79231 Inconsistent InnerClass entry flags for abstract inner enum
• KT-20677 Improve diagnostic about implicit default constructor absence for expected annotation class
• KT-9111 Improve diagnostic for call with access to outer class from nested class
• KT-81385 Missing error of nullable expression in class literal in case of reified type parameter
• KT-81141 Fix FirUnsupportedArrayLiteralChecker to forbid array literals inside non-annotation contexts
• KT-81383 Return type of anonymous function used as run argument is incorrectly inferred to Nothing
• KT-80577 "Return type mismatch" for self-referential types used as generic parameters
• KT-81198 Move type and type parameter annotations from jvm_metadata.proto to metadata.proto
• KT-81057 Wrong handling of boxing during redundant casts optimization
• KT-76479 Backend. JVM: Report errors on exposure of types in inline functions
• KT-81191 K2: "null cannot be cast to non-null type ConeTypeParameterLookupTag" with invalid code
• KT-81115 Allow converting lambda with explicit parameter when assigning to variable of an extension function type
• KT-74588 Redundant checkNotNull intrinsics instructions for Java generic methods
• KT-78390 Unmute FusStatisticsIT.testKotlinxPlugins() after AtomicFU updates kotlin-metadata-jvm
• KT-79369 Forbid typealiasing for all compiler-required annotations
• KT-76344 Drop language version 1.9 for non-JVM platforms
• KT-69294 K2: Report CONSTRUCTOR_OR_SUPERTYPE_ON_TYPEALIAS_WITH_TYPE_PROJECTION_ERROR instead of EXPANDED_TYPE_CANNOT_BE_INHERITED after switching to LV 2.2
• KT-81064 Wrong safe call null check handling during redundant casts optimization
• KT-80871 StackOverflowError on AnnotationTarget.TYPE
• KT-80908 K2: Compiling type annotation with self-annotated vararg fail with exception
• KT-76902 Omit type-use annotations from diagnostics
• KT-70507 Should parentheses prevent from plus/set operator desugaring?

Compose compiler

• b/419049140 Disabled memoization in try blocks
• KT-81081 Generate Compose-specific proguard mappings when Compose compiler plugin is applied.

IDE. Gradle Integration

• KT-46273 MPP: Don't fail import for case of missed platform in source set structure
• KT-46417 [UNRESOLVED_REFERENCE] For project to project dependencies of native platform test source sets
• KT-44845 After update to Kotlin 1.4.30 all external dependencies is unresolved in IDE with kotlin.mpp.enableGranularSourceSetsMetadata=true
• KT-46142 K/N distribution is unavailable from IDE with multiplatform hierarchical project structure enabled

IR. Inlining

Fixes

• KT-81673 False warnings about ABI change in dependencies in library mode in 2.3.0-Beta1
• KT-81713 [Inliner] Compilation of inline function with recursive call applied to TODO() fails with an internal error
• KT-74892 Investigate passing inline lambda as argument of another inline function
• KT-78392 CommonPrefix: Add a way of stopping execution when one of the phases is unsuccessful
• KT-80927 [Native] Review intrinsics with PublishedApi
• KT-81070 [Inliner] kotlin/Any is unbound
• KT-80628 KLIB inliner: Not enough information about the "full" mode
• KT-69516 Double-inlining for Native: Enable visibility checks after 1st phase of inlining
• KT-78673 Make fakeOverrideLocalGenericBase not using red code
• KT-80565 KLIB Inliner: Add a special annotation to prohibit inlining of marked inline functions in stdlib on 1st compilation phase
• KT-79718 KLIB inliner: Emit warning on generation of public synthetic accessor when running in "explicit API mode"

IR. Interpreter

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

IR. Tree

• KT-79739 Static synthetic accessors inside generic classes access its type parameters
• KT-78100 Track and annotate internal annotations with @PublishedApi to enable annotation visibility validation
• KT-80825 Drop IrSerializationSettings.reuseExistingSignaturesForSymbols setting
• KT-79807 Broken IR tree invariants in IrReplSnippet after FIR2IR
• KT-78856 Refactor LocalDeclarationsLowering to split it in smaller parts

JavaScript

• KT-80401 Kotlin/JS support for default export in generated JavaScript
• KT-79928 Allow JsModule/JsNonModule/JsQualifier invocation on per-entity level
• KT-81424 Kotlin/JS: Cannot Get / in a simple running application
• KT-81066 Wasm, JS: Remove redundant logging in compiler output
• KT-79222 K/JS: Allow using Long in exported declarations
• KT-74055 KJS: @JsPlainObject adds JS code even if marked interface is not used

Klibs

• KT-64237 Klib metadata: migrate to using the common annotations instead of klib-specific extensions in the compiler
• KT-80999 Reuse existing IrKotlinLibraryLayout in KotlinLibrary for reading pre-processed functions
• KT-80761 K2: [K/N] Should reported klib usage include inheritance
• KT-80290 Remove if and TODO in countInAsInlinedLambdaArgumentWithPermittedNonLocalReturns
• KT-80298 K/N: one-stage compilation is broken

Language Design

• KT-81561 Update nested type aliases KEEP to reflect local type aliases support
• KT-28850 Prohibit protected visibility in final expected classes

Libraries

• KT-81078 Increase kotlin.io.createTempDir and createTempFile deprecation level to ERROR
• KT-74493 Deprecate String.subSequence(start, end) with error and drop it in the future
• KT-81092 Uuid: support generation of version 7 uuids with a given timestamp
• KT-81043 String.toBigDecimalOrNull rejects strings accepted by String.toBigDecimal
• KT-81477 Uuid.Companion.generateV* are missing SinceKotlin annotation
• KT-80530 Annotate Kotlin/Native stdlib with must-use value/@IgnorableReturnValue when appropriate
• KT-79791 Duration.parse incorrectly handles negative decimal seconds in ISO-8601 format
• KT-72111 Change Duration.parseOrNull logic to not throw exceptions internally
• KT-80431 Remove suppression of "ACTUAL_ANNOTATIONS_NOT_MATCH_EXPECT" from stdlib

Native. C and ObjC Import

• KT-81312 Native: when -Xccall-mode direct is used, mark unsupported declarations with unresolvable symbol name instead of @Deprecated(ERROR)

Native. Swift Export

• KT-80969 Swift Export: Call suspend function as async on swift side
• KT-81355 Swift Export: Introduce a flag to turn off coroutines export

Tools. Build Tools API

• KT-81602 BTA: rename KotlinToolchains.jvm @JvmName for a more Java-friendly API
• KT-81321 Deprecate old BTA prototype API
• KT-73090 Gradle 8.11 kotlin compilation fails when run with -Pkotlin.compiler.runViaBuildToolsApi=true
• KT-81130 BTA: using KotlinVersion from stdlib in the API breaks when using isolated classloader

Tools. CLI

• KT-81077 Add JVM target bytecode version 25

Tools. Commonizer

• KT-49735 [Commonizer] :commonizeNativeDistribution fails for projects with two or more same native targets
• KT-47523 MPP: Unable to resolve c-interop dependency if platform is included in an intermediate source set with the only target
• KT-48118 Commonized c-interop lib is not attached to common main source set
• KT-46248 MPP: Compile KotlinMetadata fails with Unresolved reference if only one native platform from shared source set is available

Tools. Compiler Plugins

• KT-81348 Incorrect bytecode mentioning error class/package is generated by kotlinx-serialization when private serializer in another module is not accessible
• KT-81091 [DataFrame] Receivers from FirExpressionResolutionExtension are not resolved in CodeFragment
• KT-80944 FirUserTypeRefImpl cannot be cast to class FirResolvedTypeRef in maven project
• KT-80429 Power Assert with "Run test using: IntelliJ": NoClassDefFoundError (org.jetbrains.kotlin.kotlinx.collections.immutable.ExtensionsKt) during compilation
• KT-64339 Symbol Light Classes: No Arg compiler plugin generates synthethic constructor which is not seen from light classes

Tools. Gradle

New Features

• KT-45161 Gradle: Support registering generated sources with the Kotlin model
• KT-71602 Introduce KotlinTopLevelExtension

Fixes

• KT-81837 Run integration tests against AGP 8.13
• KT-77457 Compile against Gradle API 9.0
• KT-81199 Deprecate "org.jetbrains.kotlin.android" plugin
• KT-81719 Do not register swift export related configurations when it's not required
• KT-75869 KGP JS - Update deprecated constructors
• KT-79047 Gradle compileKotlin fails with configuration cache
• KT-81415 BTA: Duplicate daemons when compiling JVM + JS in KGP
• KT-80950 KGP breaks configuration cache when signing plugin with GnuPG is applied
• KT-67290 Deprecate usage of HasKotlinDependencies inside KotlinCompilation
• KT-80763 Add redirect link to error message when 'org.jetbrains.kotlin.android' plugin is used with built-in Kotlin
• KT-64273 Gradle: remove symbols deprecated after KT-54312
• KT-70251 Gradle: hide compiler symbols in KGP

Tools. Gradle. BCV

• KT-80687 Add description to Gradle tasks [ABI Validation]

Tools. Gradle. Compiler plugins

• KT-81827 Add a switch for mapping file tasks in Compose Gradle plugin

Tools. Gradle. JS

• KT-81009 K/JS, Wasm: Promote deprecation of NPM and Yarn package manager internal functions
• KT-76019 Wasm/JS: Promote phantom-js for Karma deprecation to ERROR
• KT-81005 K/JS, Wasm: Promote deprecation of ExperimentalWasmDsl to Error
• KT-81010 K/JS, Wasm: Promote deprecation of internal JS functions to Error
• KT-81008 K/JS, Wasm: Promote deprecation of ExperimentalDceDsl to Error
• KT-81007 K/JS, Wasm: Promote deprecation of public constructors of JS declarations to Error
• KT-81006 K/JS, Wasm: Promote wasm declarations in "js" package deprecation to Error
• KT-81004 K/JS, Wasm: promote deprecation NodeJsExec.create to Error
• KT-75621 KJS / Gradle: Disable npm in --offline mode

Tools. Gradle. Multiplatform

Fixes

• KT-81200 Deprecate 'androidTarget'
• KT-81060 KMP stores common compilation dependency resolution in Configuration cache leading to error when deserializing (Android only)
• KT-77367 [uklib] Project dependency to kotlin-jvm module leads to failure in transform during IDE import
• KT-61127 Remove scoped resolvable and intransitive DependenciesMetadata configurations used in the pre-IdeMultiplatformImport IDE import
• KT-81434 [uklib] androidCompileClasspath resolves java compatibility variant instead of android for uklib library
• KT-81249 Kotlin 2.2.20 broke KMP implementation of Parcelize
• KT-77066 Promote kotlinArtifacts deprecation to an error
• KT-74955 Remove resources resolution strategy completely
• KT-55312 Replace "ALL_COMPILE_DEPENDENCIES_METADATA" configuration with set of metadata dependencies configurations associated per set
• KT-52216 HMPP / KTOR: False positive "TYPE_MISMATCH" with Throwable descendant
• KT-55230 Remove metadata dependencies transformation for runtimeOnly scope

Tools. Gradle. Native

• KT-81134 Native: Gradle configuration failure likely related to Klibs cross-compilation
• KT-77486 Remove bitcode DSL
• KT-77732 commonizeCInterop failed with "Unresolved classifier: platform/posix/size_t"
• KT-80675 Commonized cinterops between "test" compilations produce an import failure

Tools. Gradle. Swift Export

• KT-81465 Swift Export package is build with wrong target
• KT-81460 [KGP] Crash in SwiftExportRunner due to older stdlib

Tools. Kapt

• KT-80843 K2: KAPT: Crash on any data class with duplicate properties: "Sequence contains more than one matching element"
• KT-71786 K2Kapt: Stubs generation does not fail on files with declaration errors

Tools. Maven

• KT-81414 2.2.20 regression: OOM (Compressed class space) when in-process
• KT-78201 Maven: migrate JVM compilation to the new BTA
• KT-81435 Maven: Improve BTA classloader reusage
• KT-81218 Kotlin Maven Plugin 2.2.20: Java classes not resolved with enabled incremental compilation without daemon

Tools. REPL

• KT-80062 ReplSnippetLowering sometimes produces IrConstructorCall with too many arguments

Tools. Scripts

• KT-80071 Kotlin script mode produces invalid IR: "value that is not available in the current scope"

Tools. Wasm

• KT-81313 K/Wasm: update Node.js to 24.x
• KT-81315 K/Wasm: update Node.js to 25.x

Changelog

Analysis API

• KT-80303 Move :native:analysis-api-klib-reader to :libraries:tools

Analysis API. Code Compilation

• KT-80227 Support unnamed context parameters in evaluation
• KT-78554 K2 IDE / Kotlin Debugger: ISE “No override for FUN IR_EXTERNAL_DECLARATION_STUB” on calling toString() for local class instance during evaluation
• KT-73201 K2 IDE: Error while evaluating expressions with local classes

Analysis API. FIR

• KT-46375 Analysis API: Support cross-file class redeclaration checks using indices
• KT-80471 Analysis API: Deduplicate equivalent call candidates in resolveToCallCandidates
• KT-79653 [Analysis API] ContextCollector: BODY context of enum classes doesn't contain enum entries
• KT-75858 K2 AA: False positive 'property must be initialized' on incremental analysis with 'field' usage and semicolon in setter
• KT-80231 AnnotationArgumentsStateKeepers doesn't restore the initial annotation in some cases
• KT-80233 Pull mutation out of AnnotationArgumentsStateKeepers
• KT-71466 LLFirBuiltinsSessionFactory uses createCompositeSymbolProvider
• KT-76432 JavaClassUseSiteMemberScope: Expected FirResolvedTypeRef with ConeKotlinType but was FirUserTypeRefImpl

Analysis API. Infrastructure

• KT-80717 Support IntelliJ Bazel build in the Kotlin Coop development mode

Analysis API. Light Classes

• KT-80656 Duplicate no-args constructor in PSI
• KT-60490 Symbol Light Classes: Property accessors from a delegated interface don't present in the delegating class
• KT-79689 SymbolLightClassForClassLike.toString() causes PSI tree loading
• KT-79012 Add a high-level overview of light classes

Analysis API. Providers and Caches

• KT-78882 K2 AA: Calling containingSymbol on getProgressionLastElement causes exception
• KT-58325 Analysis API: Combine LLKotlinStubBasedLibrarySymbolProviders in session dependencies (optimization)
• KT-77825 Analysis API: CheckersComponent consumes a lot of memory while being unused in LL FIR sessions
• KT-76526 Incorrect built-in module is provided for non-JVM sources in Standalone
• KT-62549 Analysis API: Cache callables in combined Kotlin symbol providers
• KT-70721 LL FIR: investigate possibility of moving LLFirFirClassByPsiClassProvider . getClassByPsiClass (PsiClass) to symbol providers
• KT-72998 Analysis API: Introduce getClassLikeSymbolByPsi to LL FIR symbol providers

Analysis API. Standalone

• KT-80573 Potential performance issue on class ID computation
• KT-80559 Try to optimize KotlinStandaloneDeclarationProviderFactory startup for tests
• KT-71706 Analysis API Standalone: StandaloneProjectFactory.createSearchScopeByLibraryRoots creates inefficient file-based search scopes

Analysis API. Stubs and Decompilation

Performance Improvements

• KT-77097 Support ReplaceWith deprecation annotation argument via stubs

Fixes

• KT-77082 StackOverflowError in CreateFreshTypeVariableSubstitutorStage.shouldBeFlexible
• KT-80798 Improve stubs tests coverage
• KT-75318 Read context parameter fields from metadata in CallableClsStubBuilder
• KT-77874 AA disagrees with the compiler on descriptions of context parameters from binaries in messages for context argument ambiguity errors
• KT-80350 Drop K1 decompiler
• KT-80276 Implement native coping for stubs
• KT-79780 Decompiled MultifileClass has Facade kind
• KT-79398 isClsStubCompiledToJvmDefaultImplementation flag is inconsistent for compiled and decompiled stubs
• KT-79798 Prettify stub usages in LL stub-based deserializer
• KT-78949 AbstractLLStubBasedResolutionTest: tests against real stub-based files
• KT-80251 Inconsistent decompiled and compiled stub for properties with an initializer and a delegate
• KT-74547 Implement decompiler for K2
• KT-79555 Move KotlinFileStubImpl serialization/deserialization to the Analysis API
• KT-79487 "null DefinitelyNotNullType for 'T'" from decompiler
• KT-60764 Stub Builder: fix differences between K1 and K2 stub building on decompiled files
• KT-79484 An empty enum class with a member decompiles with a synthetic error
• KT-79730 Decompiled files have an extra Kt suffix
• KT-79483 data modifier is not present on object modifier
• KT-75398 Local classes from scripts have ClassId in stubs
• KT-79412 Context parameters with type annotations cause inconsistency errors while building stubs

Analysis API. Surface

New Features

• KT-64340 Analysis API: no way to get a type of vararg parameter
• KT-68387 AA: provide context for type approximations

Performance Improvements

• KT-80713 Optimize KaDeclarationSymbol#visibility for class-like symbols
• KT-79097 KaFirNamedFunctionSymbol#isSuspend shouldn't trigger resolution
• KT-79095 isOverride shouldn't trigger resolution if not compiler plugins present

Fixes

• KT-78093 Add bridges for context parameters
• KT-79328 K2 AA, isUsedAsExpression: Unhandled Non-KtExpression parent of KtExpression: class org.jetbrains.kotlin.psi.KtImportDirective
• KT-80366 IllegalStateException from KaFirStopWorldCacheCleaner
• KT-80274 Merge AbstractMultiModuleSymbolByPsiTest to AbstractSymbolByPsiTest
• KT-80352 KaBaseResolutionScope.contains(PsiElement) always returns false for Android light classes (e.g. synthetic R.java classes)
• KT-80234 Incorrect value of isActual for the implicitly actual constructor of annotation class
• KT-80178 Incorrect modality for an abstract interface function with a redundant open modifier
• KT-79129 [Analysis API] KaFe10TypeCreator.buildClassType cannot build builtin types by class ids
• KT-79143 AA: argumentMapping contains an expression that is not an argument
• KT-59857 KaExpressionTypeProvider#returnType shouldn't throw an exception for class like declarations
• KT-79667 Enable resolve on java record components in standalone mode
• KT-73050 KaFirSymbolRelationProvider#expectsForActual: suspicius logic for KaReceiverParameterSymbol
• KT-78904 KaBaseWriteActionStartedChecker throws when no additional WA was done
• KT-79281 Add KDoc to KaTypePointer#restore
• KT-78597 KaUseSiteVisibilityChecker returns false for internal functions exposed via implicit receiver
• KT-71705 FIR api impl: Postfix increment expression's expressionType is Unit when incrementing array element
• KT-75057 Analysis API: Reference to object through typealias in invoke operator call leads to original type

Backend. Native. Debug

• KT-79848 Flaky debugger tests in opt.debug/cache.*/GC.CMS/GC.sch.ad/alloc.custom configuration

Backend. Wasm

New Features

• KT-59032 Support instantiation of annotation classes on WASM

Fixes

• KT-69621 K/Wasm: Consider enabling support for KClass.qualifiedName by default
• KT-80018 K/Wasm: exceptions don't work properly in JavaScriptCore (vm inside Safari, WebKit)
• KT-66072 K/Wasm: improve how exceptions work in JS interop
• KT-80106 devServer in Kotlin/Wasm overwrites defaults, causing missing static paths
• KT-80210 Wasm: "Unexpected non-external class: kotlin.Nothing" caused by JsExport with JsPromise
• KT-80555 WASM IC: Can't link symbol on kotlinx.coroutines on fresh master
• KT-80415 WasmJs Number Elvis Operator Crash
• KT-76509 WasmJS: ReferenceError: Temporal is not defined caused by "Redundant reference to unused external results"
• KT-79317 [Wasm] Do not throw CCE for ExcludedFromCodegen declarations
• KT-78036 K/Wasm: generate a message with "expected" and "actual" types in case of CCE

Compiler

New Features

• KT-77676 K/N: enable typechecks and the casts optimization pass in debug mode by default
• KT-80768 Warning on overloading by a superset of context parameters in class context
• KT-79185 Support for local type aliases
• KT-80461 K2: false positive NO_ELSE_IN_WHEN for complex sealed hierarchy
• KT-79380 Native: add performance measurement for the rest of backend phases
• KT-79381 Native: add performance measurement of LLVM phases
• KT-80222 Implement the prohibition of always-false is checks for definitely incompatible types
• KT-79295 Parse and build raw FIR from new short and full forms of positional destructuring with square brackets
• KT-74810 Support typealiased/mapped Java types in unused return value checker
• KT-71244 Incorporate existing @CheckReturnValue annotation(s) into Kotlin's unused return value checker
• KT-79922 Record 'MustUse/ExplicitlyIgnorable' state for overrides even in disabled RVC mode
• KT-79920 Store 'Explicitly ignorable' state of function/property in the metadata
• KT-79690 Implement a USELESS_ELVIS_LEFT_IS_NULL with elvis expression
• KT-79296 Implement/adapt diagnostics for new destructuring
• KT-79298 Report errors on new destructuring syntax in K1

Performance Improvements

• KT-81340 K/N: severe compilation time degradation after turning on casts optimization pass
• KT-80554 Kotlin/Native: investigate performance hit from always-on llvm pass profiling
• KT-80370 Add NO_INLINE attribute to some of runtime functions
• KT-80167 K/N: condense the nodes and edges in DevirtualizationAnalysis constraint graph
• KT-79535 Revert incorrect SAM conversion enhancements brought to K2

Fixes

• KT-81257 Native: "Unexpected boolean predicate" when generating 'static_cache'
• KT-80864 K2: Missing Val cannot be reassigned diagnostic for Java final fields (crashes in runtime with IllegalAccessError)
• KT-75215 KDoc: references from @param tag are rendered as plain text
• KT-79887 K2 Compiler Internal Error in 'FirFakeOverrideGenerator.checkStatusIsResolved' Method
• KT-78125 false-negative shadowed contextual overload warning on local declarations
• KT-79274 Frontend implementation of name-based destructuring
• KT-81057 Wrong handling of boxing during redundant casts optimization
• KT-80285 IJ monorepo: broken compilation after 2.2.20-RC update
• KT-81015 Mark nested typealiases as stable for 2.3
• KT-81064 Wrong safe call null check handling during redundant casts optimization
• KT-80744 Kotlin failure on lambda with type parameter
• KT-78280 Implement the sourceless KtDiagnostics
• KT-78819 K2: False positive ABSTRACT_MEMBER_NOT_IMPLEMENTED in KJK hierarchy
• KT-81018 ISE "IR class for Foo not found" on missing dependency when lowering SAM constructor
• KT-80936 NON_PUBLIC_CALL_FROM_PUBLIC_INLINE : @PublishedApi doesn't work for fun interfaces
• KT-75748 StackOverflowError when reading array from metadata annotations
• KT-80400 K2: AbstractMethodError on fun interface implementation inheriting from an interface compiled with -jvm-default=disable
• KT-80940 K2: Exception in FIR2IR with AnnotationTarget.TYPE with self-annotated non-vararg default argument and usage in child module
• KT-80538 KaFirDiagnostic.EmptyRange doesn't work in most of the cases
• KT-80524 Class is not abstract and does not implement abstract member when compiling with kotlinc-jklib
• KT-80597 Apply fix for CVE-2024-7254 to our fork of protobuf 2.6.1
• KT-80849 K2: ConstValueProviderImpl doesn't distinguish files with same name and package
• KT-80602 Exhaustiveness checker improvements for 2.3
• KT-80735 Support || return/throw shortcut in unsed return value checker
• KT-79651 Report a warning about an unused return value only on the function name
• KT-80719 False positive: "Redundant visibility modifier": when overriding protected methods as "public"
• KT-80711 IC Native: NPE during link on ktor
• KT-80795 Wong type cast is added for IMPLICIT_COERCION_TO_UNIT
• KT-80434 K2: DSL marker doesn't work with lambda fields
• KT-80383 Getter without a body is allowed on a property with an explicit backing field
• KT-80455 K2: StackOverflowError in when exhaustiveness checker on red code
• KT-72862 [Native caches] Umbrella for failing codegen/box tests for corner cases in synthetic accessors
• KT-20278 NO_TYPE_ARGUMENTS_ON_RHS: Confusing diagnostic for inner class of generic outer class
• KT-80164 Move name generation for unnamed context parameters to frontend
• KT-78112 RETURN_VALUE_NOT_USED is reported for local function even if it isn't marked with annotation in CHECKER mode
• KT-48311 Incorrect LINENUMBER after if with a suspend call
• KT-80688 Bad SourceDebugExtension caused by enhanced coroutines debugging
• KT-73851 Native: compilation fails with ClassCastException with genericSafeCasts=true
• KT-77593 Add a warning when @IgnorableReturnValue is inconsistent between expect/actual functions
• KT-78895 Consider dropping isLocalInFunction and FirClassLikeDeclaration.isLocal
• KT-79386 Confusing error message when named parameters are used for java method calls
• KT-80600 K2: Private and final modifiers are allowed on setter of open delegated property
• KT-79783 KDoc parser: Links aren't rendered if the line has an indent of 4 or more
• KT-77101 Invoke on callable reference is considered ignorable
• KT-79923 Remove lookup of @IgnorableReturnValue annotation from FirReturnValueOverrideChecker
• KT-80517 Synthetic kotlin.Any members in data classes are missing @MustUseReturnValue
• KT-80194 VAR_TYPE_MISMATCH_ON_OVERRIDE: doesn't mention the inferred type
• KT-80484 K2: ClassCastException due to fake source for implicit lambda parameter (RedundantNullableChecker)
• KT-79979 K2: ClassCastException when overriding extension property with delegation
• KT-80592 UninitializedPropertyAccessException when anayzing annotations on members of anonymous classes
• KT-80399 Anonymous Kotlin class incorrectly warns about deprecated java override despite '@Deprecated' annotation
• KT-79610 Adding CocoaPod to Kotlin/Native MPP triggers IR serialization failure and commonizer errors
• KT-79866 kotlinc 2.2.0 silently emits 'NonExistentClass' instead of reporting an error
• KT-78664 False positive VARIABLE_NEVER_READ and ASSIGNED_VALUE_IS_NEVER_READ on function type variable with splited declaration and assignment
• KT-79496 False positive "when must be exhaustive" in triangle interface/class hierarchy
• KT-79774 KtDestructuringDeclaration.getLPar & getRPar are broken
• KT-79442 "Multiple annotations of type kotlin.coroutines.jvm.internal.DebugMetadata": 2.2.0-Beta1 generates broken code with JVM default suspend methods in interfaces
• KT-80391 K2: Only one context parameter is mentioned in the [NO_CONTEXT_ARGUMENT] diagnostic
• KT-79785 ktypew:kotlin.collections.List already exists error using Swift Export
• KT-78879 "Sealed types cannot be instantiated": Can't instantiate Java-defined sealed Class from Kotlin
• KT-80330 K2: NPE at org.jetbrains.kotlin.fir.resolve.calls.FirCallResolver.createResolvedNamedReference
• KT-21598 Extension is shadowed by member should not be reported when member is deprecated with HIDDEN level
• KT-79622 FUNCTION_EXPECTED: Misleading 'expression cannot be invoked as a function' when inaccessible with private lambda
• KT-80255 [EXTENSION_FUNCTION_IN_EXTERNAL_DECLARATION] can be attached to the receiver type of a functional type
• KT-79816 Java Interfaces implemented by delegation have non-null return checks
• KT-80177 Improve message of RECEIVER_SHADOWED_BY_CONTEXT_PARAMETER in case of member extension
• KT-79770 There is no RECEIVER_SHADOWED_BY_CONTEXT_PARAMETER if the usage of fun is from inside the class
• KT-79430 False positive EXTENSION_SHADOWED_BY_MEMBER on overridden member extension
• KT-62934 Incorrect line mapping inside inline lambda after non-local return
• KT-79545 K2: no error on crossinline lambda usage in anonymous object base constructor call
• KT-79643 HAS_NEXT_FUNCTION_AMBIGUITY and NEXT_AMBIGUITY diagnostics are always ignored in favor of HAS_NEXT_FUNCTION_NONE_APPLICABLE and NEXT_NONE_APPLICABLE
• KT-79327 Modifier 'private' is not applicable to 'value parameter' is reported for context parameters
• KT-76453 K2 IDE: autocomplete freeze
• KT-77182 A function in a file annotated with @file:MustUseReturnValue doesn't produce a warning when it is used from compiled code
• KT-78541 Jspecify: Unsound platform type despite @NullMarked for an override with a generic-subclass return type
• KT-79672 'when expression must be exhaustive' even after using 'require()'
• KT-71306 K2 IDE / Kotlin Debugger: “Cannot find local variable 'block' with type kotlin.jvm.functions.Function0” on evaluating lambda arg inside inline function
• KT-80003 Kotlin/Native: deprecate eager GlobalData initialization
• KT-76991 K2 IDE / Kotlin Debugger: ISE “Couldn't find declaration file for” on evaluating local fun when the scope has also inline fun from another file call
• KT-79877 K2 IDE / Kotlin Debugger: failed evaluations of a code fragment capturing local data class
• KT-77401 [FIR] ParameterNameTypeAttribute.name doesn't support @ParameterName with compile-time constant property argument
• KT-79682 Fix partially uninitialized locals after coroutine spills insertion
• KT-79276 Dexing fails with "Cannot read field X because <local0> is null" with 2.2.0
• KT-79562 NPE when passing non-lambda argument of nullable non-suspend function type into function that accepts nullable suspend function type
• KT-79693 NotImplementedError: An operation is not implemented: Unknown file with KMP separate compilation
• KT-79662 Unused return value checker doesn't work for com.google.errorprone.annotations.CheckReturnValue
• KT-79781 Missing MISSING_DEPENDENCY_CLASS when using type alias with inaccessible RHS
• KT-79547 "UnsupportedOperationException: Not supported" with inlining and value classes
• KT-77772 Only report exposed type on qualifier if it's resolved to an object
• KT-79765 K2. Do not report ignore return value for unresolved reference
• KT-76343 Drop language version 1.8
• KT-79017 False negative REDECLARATION on private nested class
• KT-72039 StackOverflowError on calling keySet on a Kotlin subclass of Java subclass of ConcurrentHashMap
• KT-79451 Rework approach to recursive types approximation
• KT-75843 K2: incorrect line numbers in an if-expression with a super-call
• KT-77504 Add a warning when @IgnorableReturnValue is inconsistent on overrides
• KT-78389 Perform version 2.3 boostrapping
• KT-79092 Crash on default argument in function in fun interface
• KT-77729 Package-level @NullMarked does not work when kotlinc sees .java source files
• KT-79013 False negative NOT_YET_SUPPORTED_IN_INLINE on inline local functions inside inline functions
• KT-79139 False positive CONFLICTING_OVERLOADS for context parameters instead of receivers
• KT-35305 Address the overload conflict resolution between unsigned and non-primitive types
• KT-42096 No diagnostic reported on inline modifier on an enum entry
• KT-79355 Failed to fix the problem of desugared inc with new reverse implies returns contract
• KT-79277 Implies returns contract doesn't affect the return type of the function if it is in the argument position
• KT-79271 Implies returns contract doesn't impact exhaustiveness
• KT-79218 SMARTCAST_IMPOSSIBLE for top‑level extension‑property getter despite returnsNotNull contract
• KT-79220 returnsNotNull contract ignored on extension function with nullable receiver
• KT-79354 IllegalStateException: Debug metadata version mismatch. Expected: 1, got 2 with compiler 2.2.20-Beta1 and stdlib 2.2.0
• KT-77986 K2: False negative: "Local classes are not yet supported in inline functions"
• KT-79456 Redeclaration conflict checks of private top-level classifiers rely on an incorrect containing file
• KT-79125 RVC full mode: delegated interfaces are not checked
• KT-63720 Coroutine debugger: do not optimise out local variables
• KT-78595 type variable leak on a generic property as a call argument given an unstable smart cast
• KT-79076 'IllegalStateException: Cannot serialize error type: ERROR CLASS: Uninferred type' with Exposed column using recursive generic type
• KT-75797 Native: find a way to handle generates C bridges in inline functions
• KT-59807 K2: Replicate the MUST_BE_LATEINIT logic from K1
• KT-76782 K2: Incorrect resolve into unrelated invoke operator with wrong diagnostic
• KT-78066 TYPE_PARAMETER_OF_PROPERTY_NOT_USED_IN_RECEIVER error message does not account for context parameters
• KT-76136 Switch latest stable version in Kotlin project to 2.3
• KT-78881 K2: False positive "Assigned value is never read" in composable function
• KT-76065 Drop JavaTypeParameterDefaultRepresentationWithDNN feature
• KT-77808 Inference: recheck the code about DNN-related hacks
• KT-24202 NOTHING_TO_OVERRIDE if super-class reference misses generic arguments
• KT-78909 K2: Missing diagnostics [CYCLIC_INHERITANCE_HIERARCHY] for recursive class inheritance leads to StackOverflowError
• KT-75969 java.lang.IllegalArgumentException: source must not be null on red code
• KT-76902 Omit type-use annotations from diagnostics
• KT-58988 K2: Deprecate exposing package-private parameter of internal method
• KT-17460 Diagnostics and intention on suspend function that is overriden with non-suspend one.
• KT-56665 K2: false positive RECURSIVE_TYPEALIAS_EXPANSION
• KT-78932 Contracts are allowed for open and overridden property accessors
• KT-77203 FIR: Consider adding destructured type to all COMPONENT_FUNCTION_* diagnostics
• KT-76635 Implement Data-Flow Based Exhaustiveness Support
• KT-77685 "IllegalArgumentException: Sequence contains more than one matching element"
• KT-78452 Drop redundant frontend structures after fir2ir conversion

Compose compiler

New features

• 98d3907 Introduce a compose group analysis module that produces a proguard/R8 mapping from group keys in bytecode.

Fixes

• b/431025881 [Compose] Clean up runtime version checker
• b/365922168 Add java.util.Locale to the list of known stable classes
• b/407549020 Introduce a registry of known stable markers
• b/417989445 Added a diagnostic to restrict usages of runCatching in @Composable functions
• KT-80294 Fix crash with inline @Composable function reference
• b/430140896 Fix IrSourcePrinter output for when branch check and typechecks

IDE. Gradle Integration

• KT-46273 MPP: Don't fail import for case of missed platform in source set structure
• KT-46417 [UNRESOLVED_REFERENCE] For project to project dependencies of native platform test source sets
• KT-44845 After update to Kotlin 1.4.30 all external dependencies is unresolved in IDE with kotlin.mpp.enableGranularSourceSetsMetadata=true
• KT-46142 K/N distribution is unavailable from IDE with multiplatform hierarchical project structure enabled

IR. Actualizer

• KT-80002 Investigate the need for map copying in IrCommonToPlatformDependencyExtractor.kt
• KT-80131 KMP Separate Compilation: No override for FUN IR_EXTERNAL_DECLARATION_STUB name:<get-size>
• KT-80064 KMP Separate Compilation: ClassCastException: class org.jetbrains.kotlin.ir.symbols.impl.IrTypeAliasSymbolImpl cannot be cast to class org.jetbrains.kotlin.ir.symbols.IrClassSymbol
• KT-80051 KMP Separate Compilation: Actualization of common dependencies failed on 'PROPERTY FAKE_OVERRIDE name:modCount visibility:protected modality:FINAL [fake_override,var]'
• KT-79998 KMP Separate Compilation: java.lang.IllegalStateException: No override for FUN IR_EXTERNAL_DECLARATION_STUB name:<get-message>
• KT-77337 IrNoExpectSymbolsHandler finds expect class reference after enabling annotation traversal in IR

IR. Inlining

New Features

• KT-70360 KLIBs: Uniformly handletypeOf() calls at 1st/2nd stages of compilation

Performance Improvements

• KT-69497 Crossinline lambda is allocated on K/N & JS

Fixes

• KT-79334 Unify intrinsics used on 1st phase of IR inliner in KLIB-based compilers
• KT-80610 KLIB inliner: Always apply cross-module inlining to pre-processed inline functions
• KT-80565 KLIB Inliner: Add a special annotation to prohibit inlining of marked inline functions in stdlib on 1st compilation phase
• KT-80883 [Inliner] Run pre-serialization lowerings in all testrunners
• KT-77876 IrVisibilityChecker: Different set of exceptions for 1st and 2nd compilation stages
• KT-80693 [IC] Split IC invalidation tests for cross-module IR Inliner
• KT-79718 KLIB inliner: Emit warning on generation of public synthetic accessor when running in "explicit API mode"
• KT-78537 [Inliner] Incorrect KFunction.name of a reference to inlined local function
• KT-80226 [IR Inliner] Generate constructor accessors as constructors, not static functions
• KT-80653 [IR Inliner] Space: "Local declarations should've been popped out by this point"
• KT-80692 [IC] Split IC invalidation tests for intra-module IR Inliner
• KT-77103 [Inliner] IrLocalDelegatedProperty was not serialized, while its symbol and IrRichPropertyReference were.
• KT-78392 CommonPrefix: Add a way of stopping execution when one of the phases is unsuccessful
• KT-78903 Unify codegen/boxInline tests with codegen/box
• KT-78989 Add missing PL tests for inline functions/property accessors
• KT-79771 kotlinx-coroutines-core: Public synthetic accessor generated with enabled KLIB IR inliner
• KT-79680 IrConstructorSymbolImpl is unbound in lambdaWithoutNonLocalControlflow.kt
• KT-70849 Ensure correct debug info for intra-module IR inlining on the first compilation phase
• KT-79800 JS BE errors with default values when IR inliner is enabled
• KT-79352 Remove excessive validations from ValidateAfterAll... on the first stage
• KT-76599 Migrate IrValidationAfterInliningAllFunctionsPhase to the first stage of compilation
• KT-78245 Synthetic Accessors incorrectly copies default values
• KT-72594 [JS][Native] Add IrInliningFacade to test runners

IR. Interpreter

• KT-72881 K2: incorrect empty array as annotation argument when parameter has default value

IR. Tree

Fixes

• KT-77819 [IR] Fine-tune IrValidator's run after Fir2IR and IR plugins
• KT-70160 Remove IrDeclaration.parents after Anvil update
• KT-80454 LocalDeclarationsLowering: Clean-up the dead code
• KT-80819 Rework IrFileValidator to use Hashmap instead of ClassValue
• KT-80516 Kotlin-like IR dump: Don't render tailrec as lateinit
• KT-79439 KLIB stdlib symbols loading: Split the result of merging of IrBuiltins with BuiltinSymbolsBase hierarchy into two parts (for 1st & 2nd phases)
• KT-79437 KLIB stdlib symbols loading: Drop loading functions from IrBuiltins and migrate usages to SymbolFinder functions and lazy filtering
• KT-79569 Unexpected error during DFG phase in Native due to PL issue with SAM conversion represented by rich reference
• KT-79371 Fix handling of broken SAM conversion in PL with enabled Rich References
• KT-76601 IrValidatorConfig should have all checks disabled by default
• KT-69662 Deduplicate function createTemporaryVariable
• KT-79440 KLIB stdlib symbols loading: Drop BuiltinSymbolsBase from plugin API
• KT-78960 [FO] Limit static fake overrides generation for static functions
• KT-76813 IR validator: not all symbols/references are visited

JVM. Reflection

• KT-76521 Reflection: change KType representation to avoid dependency on K1
• KT-74624 Reflection: KClassifier.createType(...) ignores annotations parameter
• KT-80203 Reflection: provide a way to use legacy K1-based implementation
• KT-80236 Reflection: KType.toString for raw types no longer renders "(raw)"
• KT-79020 Suspend lambdas return type is shown as ??? in reflection
• KT-79206 Reflection: suspend functional type classifier is null
• KT-74529 Context parameters support in reflection

JavaScript

New Features

• KT-79284 Use BigInt64Array for LongArray
• KT-79394 Add the possibility to write common external declarations between JS and WasmJS targets

Performance Improvements

• KT-57128 KJS: Use BigInt to represent Long values in ES6 mode

Fixes

• KT-81424 Kotlin/JS: Cannot Get / in a simple running application
• KT-80873 KJS: Stdlib requires ES2020-compatible JS engine due to BigInt type literal
• KT-56281 KJS: Can't export suspend functions
• KT-72833 KJS: Source maps have incorrect sources paths in per-file
• KT-79926 Wrong export of interfaces with companions with ES Modules
• KT-72474 KJS: @JsPlainObject doesn't honour -XXLanguage:+JsAllowInvalidCharsIdentifiersEscaping
• KT-79644 BigInt enabled for ES 2015 despite being an ES 2020 feature
• KT-79089 KJS: Could not load reporter / Cannot find module 'mocha' when running jsNode tests
• KT-52771 KJS: Pair should be exported to JavaScript
• KT-79704 Unify variance rendering between JS and other backends
• KT-69297 Deprecate referencing inlineable lambdas in js() calls
• KT-80168 Allow @JsStatic inside interface companions
• KT-80086 [k/js] Resolving imported string literals
• KT-79066 [Kotlin/JS] jsNodeTest fails with SyntaxError when a test file has @file:JsExport and useEsModules() is enabled
• KT-79359 Kotlin/JS: Suspending function doesn’t return Unit on es2015
• KT-77385 Investigate partial linkage problems for JS HMPP tests
• KT-79628 Remove IR nodes from ExportModel
• KT-79916 K/JS: "Uncaught TypeError" when using 'Xes-long-as-bigint' in compose-html
• KT-79050 KJS / IC: "Unexpected body of primary constructor for processing irClass"
• KT-79977 KJS: Long.rotateLeft returns incorrect result when BigInts are enabled
• KT-70222 Remove legacy JS BE-related CLI flags
• KT-78831 AbstractFunctionReferencesLowering: fragile fake override generation
• KT-52230 KSJ IR: Applying identity equality operator to Longs always returns false
• KT-6675 KotlinJS: toInt() on external Long throws error
• KT-79184 K/JS: Further intrinsify BigInt-backed Long operations

Klibs

Performance Improvements

• KT-80861 [Klib] Deduplicate IrFileEntry.name
• KT-80866 [Klib] Optimize size of IrFileEntry.line_start_offset
• KT-80438 Uncached KlibMetadataClassDataFinder.findClassData

Fixes

• KT-80298 K/N: one-stage compilation is broken
• KT-80099 KLIB resolver: Could not find file because of missing klib extension in resolved symlink path
• KT-79958 KLIB tool fails to render IR if there is IrErrorType in a lirbrary
• KT-75241 Move ExperimentalLibraryAbiReader to a publishable artifact
• KT-76260 Make IrRichCallableReferencesInKlibs lang feature stable in LV=2.3
• KT-61552 [PL] IndexOutOfBoundsException in SAM conversion with substituted function
• KT-74417 Deduce the metadata version based on LV in KLIB-based backends
• KT-75980 [Klib] Reduce serialized size of IrFileEntries for sparse usage of another source files
• KT-73826 Deduplicate IrFileEntry that is serialized inside IrInlinedFunctionBlock

Language Design

• KT-76926 Allow return in expression bodies if return type is specified explicitly
• KT-23610 Overload resolution ambiguity for suspend function argument
• KT-32619 JS: return Promise when continuation is not provided
• KT-78866 Warn implicit receiver shadowed by context parameter
• KT-78976 Decide if K2 should support local functions inside of local inline functions
• KT-79308 Ability to actualize empty interfaces as Any
• KT-48872 Provide modern and performant replacement for Enum.values()

Libraries

New Features

• KT-31400 Add smartcast for isArrayOf
• KT-78463 Annotate wasm and JS targets of kotlin-stdlib with @IgnorableReturnValue when appropriate
• KT-74444 EnumEntries type should implement RandomAccess
• KT-78462 Annotate kotlin-stdlib-jvm with @IgnorableReturnValue where appropriate

Fixes

• KT-80778 Stabilize kotlin.time.Clock and kotlin.time.Instant
• KT-80619 [KLIBs] Enable intra-module inliner in stdlib & kotlin-test
• KT-76773 stdlib: contextOf's type argument can be inferred via contextOf's context argument
• KT-71822 Intersection with (subtraction from) an identity set may produce incorrect results
• KT-74411 Introduce Uuid.generateV4() and generateV7()
• KT-80605 Rename MustUseReturnValue -> MustUseReturnValues
• KT-56822 Deprecate Number.toChar() with error deprecation level
• KT-69947 KLIB stdlib: All intrinsics that can be used in KLIBs with inlined IR must be included in stdlib ABI dump
• KT-59044 Improve various aspects of TimeSource documentation
• KT-80544 Mark controversial path extensions (like .deleteRecursively()) as ignorable
• KT-80603 K/N and K/Wasm: \p{N} category is not supported
• KT-79192 Increase InputStream.readBytes(Int) deprecation level to HIDDEN
• KT-80661 ArrayDeque.lastIndexOf may return -1 for an element present in the deque
• KT-80390 ArrayDeque.indexOf(null) wrongly returns 0 after removals
• KT-79094 Change signature of assertFailsWith or make lambda excluded otherwise
• KT-72028 Incorrect parameters order in IndexedValue documentation
• KT-80130 [stdlib] Commonize AssociatedObjects in commonNonJvmMain
• KT-80107 [stdlib] Move CancellationException to commonNonJvmMain
• KT-80179 Investigate why StringBuilder.length is not enhanced automatically
• KT-80046 Increase test coverage of Duration.parse[IsoString][OrNull] methods
• KT-76459 Remove comments about sorting stability in unsigned-type arrays
• KT-79489 Generate Stdlib API reference for webMain source set
• KT-78243 Drop JS- and Wasm-specific IrLinkageError classes
• KT-79108 Remove the default argument for linkageError from kotlin.js.getPropertyCallableRef
• KT-79130 K/JS: Remove bodies from intrinsified Long methods
• KT-79239 K/Wasm: elementAt extension function of Array/PrimitiveArray/UnsignedArray does not throw IndexOutOfBoundException on incorrect index
• KT-79256 K/Wasm: MatchResult.groups raises a trap on invalid group index
• KT-57317 Repack EnumEntries from stdlib into the compiler

Native

• KT-79384 K/N: Application Not Responding: Thread Deadlock
• KT-80536 Native: DependencyDownloader seems to have no timeout
• KT-80624 Bump minimal watchOS supported versions to 7.0
• KT-80620 Bump minimal iOS and tvOS supported versions to 14.0

Native. Build Infrastructure

• KT-80147 Set proper LV and AV for kotlin-native/performance/buildSrc
• KT-79474 Kotlin/Native: fix breakpad build
• KT-79215 Kotlin/Native: fix distInvalidateStaleCaches on windows

Native. C and ObjC Import

• KT-79571 Xcode 26 beta 4: CInteropKT39120TestGenerated.testForwardEnum failed
• KT-79753 Native: support CCall.Direct calls in the compiler
• KT-80838 Cinterop fails with an error when Compilation works fine
• KT-79752 Native: make cinterop generate CCall.Direct annotations
• KT-49034 Kotlin/Native: cnames.structs.Foo resolves into wrong declaration

Native. ObjC Export

• KT-78810 [ObjCExport] Enable explicit ObjC block parameter names by default
• KT-80271 ObjC/Swift Export: Remove Native platform Cloneable checks
• KT-78604 Consider not inheriting KlibScope from KaScope
• KT-79767 ObjCExport: private companion must not be exposed
• KT-79724 ObjCExport: extensions order
• KT-79548 ObjCExport: mangling difference between K1 and K2 when translating KotlinDurationCompanion
• KT-79475 ObjCExport: invalid property getter translation
• KT-79346 ObjCExport: Any method overrides
• KT-78871 ObjCExport: translation of keyword release with parameter generates invalid header

Native. Runtime. Memory

• KT-75918 Native: Deprecate -Xallocator=std
• KT-80678 Native: pagedAllocator=false sweep is slow
• KT-75916 Native: Enable sanitizer support with pagedAllocator=false

Native. Swift Export

• KT-80111 Swift Export Build Fails Due to Errors in KotlinStdlib.swift
• KT-80884 Swift Export: support async in SIR
• KT-80185 Swift Export: IllegalArgumentException – Collection contains more than one matching element
• KT-79889 K/N: swift-export fails under several different conditions
• KT-79518 Swift export: represent kotlin.Any as swift.any
• KT-78603 Do not inherit SirAndKaSession from KaSession
• KT-79227 Swift Export: Fix First Release Issues
• KT-79521 '_CoroutineScope' is inaccessible due to 'internal' protection level
• KT-79181 Swift Export Fails When Using T: Comparable<T> Generic Constraint in Kotlin Classes

Tools. Ant

• KT-75875 Remove Ant support

Tools. BCV

• KT-80313 Add ability to generate dump from jar files [ABI Tools]

Tools. Build Tools API

• KT-79409 BTA: Support removed compiler arguments properly
• KT-78196 BTA: implement API adapter for the prototype implementation
• KT-77999 BTA: Generate BTA options from compiler arguments descriptions
• KT-78194 BTA: port the JVM prototype to the new design
• KT-78193 BTA: Implement core infrastructure according to the new design
• KT-78195 BTA: migrate the test infrastructure from the prototype to the new design

Tools. CLI

• KT-79867 CompilerConfiguration.configureSourceRoots puts obfuscated file paths instead of ones passed on classpath to CLIConfigurationKeys.CONTENT_ROOTS
• KT-80348 Expose 'XXLanguage' compiler argument as a normal argument
• KT-80428 KMP Separate Compilation: Handle friend dependencies
• KT-74590 Deprecate -Xjvm-default in favor of -jvm-default
• KT-80349 KMP Separate Compilation is enabled on non-KMP compilations
• KT-79982 Fix description of -Xjspecify-annotations
• KT-79403 Improve generator for deprecated CLI arguments
• KT-75968 Set proper lifecycle for all existing compiler arguments
• KT-79293 Create Language Features and compiler argument with parameter for new destructuring features

Tools. Commonizer

• KT-49735 [Commonizer] :commonizeNativeDistribution fails for projects with two or more same native targets
• KT-47523 MPP: Unable to resolve c-interop dependency if platform is included in an intermediate source set with the only target
• KT-48118 Commonized c-interop lib is not attached to common main source set
• KT-46248 MPP: Compile KotlinMetadata fails with Unresolved reference if only one native platform from shared source set is available

Tools. Compiler Plugin API

• KT-74867 LLFirIdePredicateBasedProvider matches local classes when it shouldn't
• KT-52665 Deprecate ComponentRegistrar
• KT-55300 Provide a mechanism to describe ordering and dependencies for compiler plugins
• KT-75865 Provide an API for setting the file name for the file with top-level declarations generated by a plugin

Tools. Compiler Plugins

• KT-80815 NoArg compiler plugin: Promote NO_NOARG_CONSTRUCTOR_IN_SUPERCLASS diagnostic from warning to error
• KT-80822 False positive NO_NOARG_CONSTRUCTOR_IN_SUPERCLASS reported for a class with explicit noargs constructor already present
• KT-53122 Constructors generated with NoArg have no @Metadata and are invisible for the frontend
• KT-79319 Lombok: NullPointerException on mvn compile when importing Java constants
• KT-74687 Kotlin Lombok: False positive when calling builder on Java record
• KT-80419 Remove bundled jetbrains annotations from kotlin-dataframe-compiler-plugin
• KT-79245 [AtomicFU] Drop K1/JS- and K1/Native-specific testrunners
• KT-79197 DataFrame: Cannot find local variable 'this@df' with type Scope0
• KT-73865 Incorrect type is generated for irPropertyReference during K/N transformation

Tools. Compiler plugins. Serialization

• KT-70345 Promote COMPANION_OBJECT_IS_SERIALIZABLE_INSIDE_SERIALIZABLE_CLASS diagnostic to error
• KT-79695 Serialization does not exclude field-less properties in 2.2.20-Beta2
• KT-79246 [Serialization] Drop K1-specific testrunners

Tools. Gradle

Fixes

• KT-80763 Add redirect link to error message when 'org.jetbrains.kotlin.android' plugin is used with built-in Kotlin
• KT-81038 Gradle: remove support for properties disabling precise task outputs backup
• KT-75449 Update deprecation of KotlinJsTestFramework#createTestExecutionSpec
• KT-80875 Gradle: runToolInSeparateProcess may fail on Windows with too long command line
• KT-79851 Emit an actionable warning/error on unsupported AV/LV configured by kotlin-dsl
• KT-64273 Gradle: remove symbols deprecated after KT-54312
• KT-77458 Run Gradle integration tests against Gradle 9.0
• KT-74915 Make ExtrasProperty.kt internal
• KT-64992 Remove KotlinCompilation.source
• KT-76720 Raise deprecation level to error for Kotlin*Options properties
• KT-80172 Error message changes depending on the order of applying 'org.jetbrains.kotlin.android' and 'AGP' 9.0+ with built-in Kotlin plugin
• KT-76177 Remove deprecated classpath snapshot task inputs
• KT-79238 Bump minimal supported AGP version to 8.2.2
• KT-79339 Remove additionalMetadata from compiler options DSL
• KT-78741 Add FUS analytics for klib cross-compilation
• KT-73478 Add module level description
• KT-80083 KGP IT: fix tests on Windows
• KT-79034 Automatically disable cross compilation if it's not supported on the host
• KT-79408 A lot of errors files are created when compile Kotlin
• KT-78827 Rewrite Gradle compiler options DSL generator

Tools. Gradle. BCV

• KT-80621 Move Gradle tasks into suitable groups [ABI Validation]
• KT-78625 Kotlin's built-in BCV generates empty .api files

Tools. Gradle. JS

• KT-79910 Wasm, JS: Upgrade NPM versions
• KT-79921 Web Tooling Gradle API does not respect webpack reconfiguration
• KT-76996 Wasm: js tasks triggers wasm subtasks
• KT-79237 Upgrade NPM dependencies versions

Tools. Gradle. Multiplatform

New Features

• KT-76446 Add kotlin-level dependency block to work the same way as commonMain/commonTest dependencies blocks

Fixes

• KT-80785 With android.builtInKotlin=false and android.newDsl=true, using kotlin-android plugin will fail with ClassCastException
• KT-61127 Remove scoped resolvable and intransitive DependenciesMetadata configurations used in the pre-IdeMultiplatformImport IDE import
• KT-62614 Remove legacy kotlin-gradle-plugin-model
• KT-79559 AGP complains about configurations resolved at configuration time due to KMP partially resolved dependencies diagnostic
• KT-78993 The value for property '*' property 'dependencies' is final and cannot be changed any further
• KT-74005 Implement a prototype of Unified Klib support in Kotlin Gradle Plugin
• KT-76200 TestModuleProperties.productionModuleName for JVM module isn't present with 2.1.20-RC
• KT-55312 Replace "ALL_COMPILE_DEPENDENCIES_METADATA" configuration with set of metadata dependencies configurations associated per set
• KT-52216 HMPP / KTOR: False positive "TYPE_MISMATCH" with Throwable descendant
• KT-54312 TCS: Replace CompilationDetails abstract class hierarchy by composable implementation
• KT-55230 Remove metadata dependencies transformation for runtimeOnly scope

Tools. Gradle. Native

• KT-80675 Commonized cinterops between "test" compilations produce an import failure
• KT-64107 Kotlin Gradle plugin allows native binaries to have both debuggable and optimized flags set to true
• KT-74910 Bump destinationDir in CInteropProcess to hidden
• KT-74911 Promote CInteropProcess.konanVersion to hidden
• KT-74864 Enable exporting KDocs by default to ObjC
• KT-72705 K/N: compile task cache can not be used due to 'artifactVersion' input property

Tools. Gradle. Swift Export

• KT-79524 NoSuchMethodError: 'java.lang.String org.gradle.api.artifacts.ProjectDependency.getPath() for swift export with dependency export fro gradle < 8.11

Tools. Incremental Compile

• KT-75864 Implement a conservative mechanism of the IC with compiler plugins generated top-level declarations
• KT-79504 Implement an API to provide IC lookups from backend plugins
• KT-55982 K2: Consider global lookups from plugins in incremental compilation
• KT-75657 Fix difference in incremental compilation scenarios in BTA in-process vs daemon compilation mode
• KT-79541 Refactor tracking of files relation in IC
• KT-74628 Incremental compilation runner does not check compiler exit code before mapping sources to classes

Tools. JPS

• KT-77347 Support file-less compatible IC approach

Tools. Kapt

• KT-73411 Remove kapt.use.k2 property and code which allows to use K2 with K1 kapt
• KT-79138 K2: KAPT Java Stub Gen: Unresolved reference with @kotlin.Metadata in Java in 2.2.0
• KT-79641 Kapt: too much information is printed in verbose mode
• KT-79305 K2 kapt: ISE "Cannot evaluate IR expression in annotation" on typealias with unresolved expansion
• KT-79136 K2 kapt: unresolved nested class references in annotation arguments are generated without outer class names
• KT-79133 K2 kapt: class literal with typealias is not expanded

Tools. Performance benchmarks

• KT-79709 Add -Xdetailed-perf CLI flag to control verbosity of performance logs
• KT-79226 [K/N] Add performance measurement for native backend lowerings

Tools. Statistics (FUS)

• KT-77407 Add performance measurement for prefix lowerings
• KT-79455 [FUS] Collect KSP plugin version
• KT-79090 Integrate dynamic stats into MarkdownReportRenderer

Tools. Wasm

• KT-80582 Multiple reloads when using webpack dev server after 2.2.20-Beta2
• KT-80896 K/Wasm: debug tests only once
• KT-78921 K/Wasm: don't generate empty yarn.lock file

Changelog

Backend. Wasm

• KT-81372 K/Wasm: JsException: Exception was thrown while running JavaScript code on Safari 18.2/18.3
• KT-80018 K/Wasm: exceptions don't work properly in JavaScriptCore (vm inside Safari, WebKit)

Compiler

• KT-81191 K2: "null cannot be cast to non-null type ConeTypeParameterLookupTag" with invalid code
• KT-80936 NON_PUBLIC_CALL_FROM_PUBLIC_INLINE : @PublishedApi doesn't work for fun interfaces

JavaScript

• KT-79926 Wrong export of interfaces with companions with ES Modules
• KT-81424 Kotlin/JS: Cannot Get / in a simple running application
• KT-80873 KJS: Stdlib requires ES2020-compatible JS engine due to BigInt type literal

Native

• KT-79384 K/N: Application Not Responding: Thread Deadlock

Tools. Gradle

• KT-79047 Gradle compileKotlin fails with configuration cache
• KT-81148 Publishing helpers in KGP are incompatible with Isolated Projects
• KT-80950 KGP breaks configuration cache when signing plugin with GnuPG is applied

Tools. Gradle. Multiplatform

• KT-61127 Remove scoped resolvable and intransitive DependenciesMetadata configurations used in the pre-IdeMultiplatformImport IDE import
• KT-81249 Kotlin 2.2.20 broke KMP implementation of Parcelize

Tools. Gradle. Native

• KT-81510 commonizeCInterop exception with 'kotlinNativeBundleConfiguration' not found
• KT-81134 Native: Gradle configuration failure likely related to Klibs cross-compilation
• KT-77732 commonizeCInterop failed with "Unresolved classifier: platform/posix/size_t"
• KT-80675 Commonized cinterops between "test" compilations produce an import failure

Tools. Maven

• KT-81218 Kotlin Maven Plugin 2.2.20: Java classes not resolved with enabled incremental compilation without daemon

Tools. Wasm

• KT-80582 Multiple reloads when using webpack dev server after 2.2.20-Beta2

Changelog

Tools. Gradle. Native

• KT-81134 Native: Gradle configuration failure likely related to Klibs cross-compilation
• KT-81510 commonizeCInterop exception with 'kotlinNativeBundleConfiguration' not found

Changelog

Backend. Wasm

• KT-81372 K/Wasm: JsException: Exception was thrown while running JavaScript code on Safari 18.2/18.3
• KT-80018 K/Wasm: exceptions don't work properly in JavaScriptCore (vm inside Safari, WebKit)

Compiler

• KT-81191 K2: "null cannot be cast to non-null type ConeTypeParameterLookupTag" with invalid code
• KT-80936 NON_PUBLIC_CALL_FROM_PUBLIC_INLINE : @PublishedApi doesn't work for fun interfaces

JavaScript

• KT-80873 KJS: Stdlib requires ES2020-compatible JS engine due to BigInt type literal
• KT-79926 Wrong export of interfaces with companions with ES Modules

Native

• KT-79384 K/N: Application Not Responding: Thread Deadlock

Tools. Gradle

• KT-81148 Publishing helpers in KGP are incompatible with Isolated Projects
• KT-80950 KGP breaks configuration cache when signing plugin with GnuPG is applied
• KT-79047 Gradle compileKotlin fails with configuration cache

Tools. Gradle. Multiplatform

• KT-81249 Kotlin 2.2.20 broke KMP implementation of Parcelize
• KT-61127 Remove scoped resolvable and intransitive DependenciesMetadata configurations used in the pre-IdeMultiplatformImport IDE import

Tools. Gradle. Native

• KT-77732 commonizeCInterop failed with "Unresolved classifier: platform/posix/size_t"
• KT-80675 Commonized cinterops between "test" compilations produce an import failure

Tools. Maven

• KT-81218 Kotlin Maven Plugin 2.2.20: Java classes not resolved with enabled incremental compilation without daemon

Tools. Wasm

• KT-80582 Multiple reloads when using webpack dev server after 2.2.20-Beta2

Changelog

Analysis API

• KT-78187 Synthetic properties not to be shown as callables
• KT-72525 K2. red code and KIWA on new-lines in guarded when conditions (with parentheses)
• KT-74246 KaVisibilityChecker.isVisible is inefficient with multiple calls on the same use-site

Analysis API. Code Compilation

• KT-78382 K2 IR lowering error when interface extends interface
• KT-73201 K2 IDE: Error while evaluating expressions with local classes
• KT-78164 Evaluator: '@JvmName' annotations are not recognized in other modules
• KT-76457 K2 IDE / KMP Debugger: KISEWA “Cannot compile a common source without a JVM counterpart” on evaluating inline fun from common module inside jvm
• KT-73084 K2 evaluator cannot resolve local variables standing at the closing brace

Analysis API. FIR

Performance Improvements

• KT-76490 Do not load ast during the contracts phase if no contracts present
• KT-78132 Do not check FirElementBuilder#tryGetFirWithoutBodyResolve optimization for already resolved declarations

Fixes

• KT-72227 SOE from recursive value class
• KT-68977 K2 IDE: Reference to companion object through typealias in a function call does not work
• KT-72357 Implement partial body resolution
• KT-76932 Support context parameters on dangling modifier list
• KT-72407 FirImplementationByDelegationWithDifferentGenericSignatureChecker: FirLazyExpression should be calculated before accessing
• KT-77602 K2 / Analysis API: KAEWA “No fir element was found for KtParameter” on incorrect context()-call
• KT-77629 K2: NPE: "org.jetbrains.kotlin.fir.java.declarations.FirJavaTypeParameter.performFirstRoundOfBoundsResolution"
• KT-76855 Analysis API: KaType.asPsiType returns null for a local inner class in dependent analysis tests
• KT-72718 ImplicitReceiverValue.createSnapshot creates invalid FIR if receiver is smart-casted
• KT-76811 Analysis API: resolveToFirSymbol finds a FirPropertySymbol for a KtScript in dependent analysis
• KT-73586 [Analysis API] Add lazyResolveToPhase(STATUS) before accessing modifiers of members
• KT-71135 AA: exception from sealed inheritors checker when analyzeCopy
• KT-75534 K2 AA: "Containing declaration should present for nested declaration class KtNamedFunction" with dangling annotation on top-level anonymous function
• KT-75687 K2: local variable doesn't get to the do-while scope
• KT-56543 LL FIR: rework lazy transformers so transformers modify only declarations they suppose to

Analysis API. Infrastructure

• KT-76809 Analysis API: Dependent analysis tests frequently work with the original element instead of the copied element

Analysis API. Light Classes

• KT-78835 Find usages of a light constructor from a class with an empty body finds usages of class as well
• KT-78878 K2. Method shown as unavailable in Java when @JvmExposeBoxed is applied (redundantly) at both class and method level in Kotlin
• KT-78065 Support "Expose boxed inline value classes" in Light Classes
• KT-78076 DLC: KotlinDeclarationInCompiledFileSearcher missed accessors if types are boxed
• KT-77569 SLC: annotation missing from generated no-args constructor
• KT-75182 K2 AA. False positive red code "Unresolved reference" to a Kotlin method in Java when Kotlin uses a value class with @JvmOverloads
• KT-77564 Constructor with JvmOverloads and value class shouldn't mark regular constructors private
• KT-77505 K2: find usages on java accessor methods do not detect kotlin property accessor usages
• KT-76789 Annotation resolve shouldn't search through non-class members
• KT-76907 Wrong equality between repeatable annotation and container

Analysis API. Providers and Caches

• KT-77578 Analysis API: Performance degradation of KaBaseResolutionScope.contains after introduction of library restriction scopes
• KT-78640 Analysis API: Remove "friend builtins provider" from FirDeclarationForCompiledElementSearcher
• KT-74907 Analysis API: Apply platform-based library module content restrictions consistently
• KT-77605 AA: Leaking KaDanglingFileModule through IdeKotlinPackageProvider
• KT-62474 Analysis API: Improve mergeability and performance of custom search scopes
• KT-77022 Get rid of ExpectBuiltinPostProcessor workaround
• KT-77248 Delegation of JavaModuleResolver is restricted to CliJavaModuleResolver
• KT-76850 LLFirLibrarySession cannot be cast to LLFirResolvableModuleSession
• KT-76952 Analysis API: when exhaustiveness analysis fails for sealed classes in dangling files
• KT-72390 Kotlin project full of red code

Analysis API. Standalone

• KT-78638 Analysis API Standalone: Stdlib builtins are not indexed in STUBS deserialized declaration origin mode

Analysis API. Stubs and Decompilation

• KT-77496 Support HAS_MUST_USE_RETURN_VALUE metadata flags in FirStubBasedMemberDeserializer
• KT-77778 Function receivers doesn't have annotations
• KT-77777 Receiver annotations shouldn't be present on types
• KT-77538 Support default property accessors with annotations
• KT-77763 Decompiled stubs miss inline modifier for property accessors
• KT-77309 Decompiled property from annotation constructor with default value should have a constant initializer
• KT-77168 Prefer DataInputOutputUtil for serialization/deserialization
• KT-77117 Flaky WRONG_ANNOTATION_TARGET diagnostic
• KT-76791 Function signature types are deserialized inconsistently
• KT-76947 Support functional types with context parameters

Analysis API. Surface

New Features

• KT-73473 Provide KaExpressionInformationProvider.isUsedAsResultOfLambda
• KT-77278 Implement psi-based KaFirKotlinPropertyKtPropertyBasedSymbol#hasBackingField
• KT-70770 KaLocalVariableSymbol: support isLateInit

Performance Improvements

• KT-78526 Get rid of redundant checkValidity from withPsiValidityAssertion

Fixes

• KT-77674 Analysis API: Redundant smart cast to the original type
• KT-76577 Guard KaFirStopWorldCacheCleaner from deadlocks via threads waiting
• KT-78820 K2: ISE "FIR element class FirErrorExpressionImpl is not supported in constant evaluation" through RedundantValueArgumentInspection
• KT-75057 Analysis API: Reference to object through typealias in invoke operator call leads to original type
• KT-79042 Do not restore KaTypePointer if target kind has changed
• KT-72421 AA: "KtReference.resolveToSymbols" returns empty list when ASSIGN_OPERATOR_AMBGUITY error is present
• KT-63464 AA: KtPsiTypeProvider#asPsiType doesn't substitute kotlin.Unit
• KT-75913 K2: SymbolLightLazyAnnotation evaluates arguments and replaces them with constants
• KT-78628 K2. Setting Receiver=true in Change Signature produces parameter of regular function type receiver instead of extension function type
• KT-78278 ISE: FIR element "class org.jetbrains.kotlin.fir.expressions.impl.FirErrorResolvedQualifierImpl" is not supported in constant evaluation at org.jetbrains.uast.kotlin.internal.FirKotlinUastConstantEvaluator.evaluate
• KT-73184 Analysis API: KaFunctionCall.argumentMapping is unexpectedly deparenthesised
• KT-73327 Cover all psi inputs with scope validity assertions
• KT-78613 PSI: add binary compatibility checks
• KT-74013 Analysis API: Cover the API surface with @SubclassOptInRequired annotations
• KT-76614 Move the parser and lexer to a separate module
• KT-78552 KaFunctionValueParameter is not marked as KaLifetimeOwner
• KT-71152 Add back SubclassOptInRequired to classes in KaModule.kt
• KT-71876 Support storing parameter names in KaFunctionType
• KT-77738 AA: inconsistent KaType.allSupertypes regarding multiple iterations
• KT-75358 K2 AA, KaFirVisibilityChecker: private member of anonymous object is not visible inside it
• KT-73723 K2 AA, KaFirVisibilityChecker: protected member of superclass is not visible from anonymous object
• KT-78057 [Analysis API, K2] Context parameters are not resolved in KDoc
• KT-73758 K2 Mode: "KaEvaluator.evaluate" does not work for simple arithmetic expressions
• KT-72301 K2 AA. PSI should present for declaration built by Kotlin code on property access syntax of generic Java getter through Kotlin subclass
• KT-77730 K2: Unable to get a light PSI for a nested annotation used with fully-qualified name
• KT-73216 K2: unresolvable references in type parameters
• KT-71794 Analysis API: Types with errors have unresolved qualifiers in lambda parameters position
• KT-65846 Support parameter names in functional type rendering
• KT-76738 K2 AA: rendering constructor of sealed class inserts protected modifier
• KT-77515 KaTypeProvider#receiverType should be more tolerant to an error code
• KT-77333 K2 AA: KaFirTypeProvider.getType: InvalidFirElementTypeException: For TYPE_REFERENCE with text I, unexpected element of type: FirSuperReceiverExpressionImpl found
• KT-76044 K2 AA: isFun is true for restored symbol of Java interface with several methods
• KT-77264 KaTypeProvider#type should be more tolerant to an error code
• KT-77282 KaPropertySymbol: support isDelegatedProperty for libraries
• KT-77254 K2 AA: expectedType doesn't provide anything for parameter default value
• KT-74777 KaVariableSymbol.hasBackingField returns incorrect result for libraries
• KT-77280 Rename KaPropertyAccessorSymbol#isCustom to isNotDefault
• KT-77210 Analysis API: scopeContext shows implicit receiver with a class instance in the class constructor
• KT-77196 Clarify differences between KaPropertyAccessorSymbol#{isDefault, hasBody}
• KT-76580 K2: No expected type for the second+ vararg argument
• KT-76750 K2. internal exception 'Unable to provide inlay hint' on typo in nested lambdas
• KT-73290 Analysis API: Improve the architecture of content scopes and resolution scopes
• KT-73055 Get rid of the deprecated Analysis API API
• KT-70199 K2: ConcurrentModificationException at FirCallCompleter$LambdaAnalyzerImpl.analyzeAndGetLambdaReturnArguments

Backend. Wasm

New Features

• KT-65721 K/Wasm: stop unconditionally exporting any main function from the root package

Performance Improvements

• KT-70097 Optimize shared primitive variables in Native and Wasm

Fixes

• KT-80106 devServer in Kotlin/Wasm overwrites defaults, causing missing static paths
• KT-80018 K/Wasm: exceptions don't work properly in JavaScriptCore (vm inside Safari, WebKit)
• KT-66072 K/Wasm: improve how exceptions work in JS interop
• KT-77897 WasmJs: ClassCastException when using star-projection with nullable transformation in generic extension function
• KT-71533 K/Wasm + K2: no error on KClass::qualifiedName usages
• KT-73931 WASM: "RuntimeError: illegal cast" with nullable generic
• KT-65403 [WASM] RuntimeError is thrown instead of ClassCastException
• KT-79317 [Wasm] Do not throw CCE for ExcludedFromCodegen declarations
• KT-66085 K/WASM: Runtime error is uncaught with catch (e: Throwable)
• KT-78036 K/Wasm: generate a message with "expected" and "actual" types in case of CCE
• KT-78384 K/Wasm: Incorrect debug info of local declarations in inline function from another file
• KT-72220 Wasm: Unclear exception in case of missed dependency
• KT-71691 No trace on Wasm/JS if an error occurred in initializing global variables in a file with the main function
• KT-67554 [Wasm] Consider to have reference equals or/and equals for function references
• KT-71521 K/Wasm: incorrect results on equality checks for capturing property references
• KT-71522 K/Wasm: incorrect results on equality checks for function references
• KT-69570 K/Wasm: JsExport with default parameter value compiles to invalid Wasm
• KT-71517 K/Wasm: KClass::qualifiedName for local classes and objects returns non-null value
• KT-68309 WASM: Anonymous class simpleName returns "<no name provided>" instead of null
• KT-77272 K/Wasm: Remove kotlin.wasm.internal.ClosureBox* classes from the standard library
• KT-66106 Wasm: lambda was not invoked in test lambda2.kt
• KT-77855 [Wasm] Improve virtual function calls speed for lambdas
• KT-77501 Wasm: unsigned vararg compiles to invalid Wasm
• KT-76775 [Wasm] Inconsistent FP mod operation
• KT-77464 Wasm: KType.toString() has simple names even with -Xwasm-kclass-fqn
• KT-77465 Wasm: KTypeParamter printed without variance information

Compiler

New Features

• KT-71768 Enable -Xjvm-default=all-compatibility by default to generate JVM default interface methods
• KT-78374 Make indy lambda function name generation more consistent
• KT-45683 Allow generics in contract type assertions
• KT-27090 Support contracts in getter and setter for top-level extension properties
• KT-76766 Warning is missing for wrong subclass checking
• KT-71244 Incorporate existing @CheckReturnValue annotation(s) into Kotlin's unused return value checker
• KT-73256 Implement all meta-target for annotations
• KT-78792 Report warning for redundant return in expression body
• KT-32313 Support contracts for operator functions
• KT-70722 Implement better Kotlin warnings for value classes and JEP 390 (Warnings for Value-Based Classes)
• KT-65688 Generate when-expressions over final classes via invokedynamic typeSwitch + tableswitch on JDK 21+
• KT-54344 Trigger the unused expression warning for interpolated strings, even when the expression may have side effects
• KT-74807 Implement 'full' unused return value checker mode
• KT-77653 K/N: an optimization pass to remove redundant type checks
• KT-64477 Enhance KotlinLightParser to make it able to parse scripts
• KT-74809 Support unnamed local variables
• KT-72941 ANNOTATIONS_ON_BLOCK_LEVEL_EXPRESSION_ON_THE_SAME_LINE missing in K2
• KT-75061 Support context-sensitive resolution in type position

Performance Improvements

• KT-77993 Optimize old PSI/LightTree Kotlin parser
• KT-78672 Consider having FirCallableSymbol.callableId null for local properties / parameters
• KT-77839 K2: consider not creating CallableId for value parameters / variables / fields
• KT-74981 Kotlin/Native: large binary size for iOS target in 2.1.0(LLVM16)
• KT-77838 K2: consider replacing LinkedHashMap with HashMap inside scopes and scope session
• KT-76698 Android Studio compose preview holds read lock 700ms for KaCompilerFacility API
• KT-68677 Kotlin compilation issue when using EnumMap and Pair

Fixes

• KT-79979 K2: ClassCastException when overriding extension property with delegation
• KT-67146 UPPER_BOUND_VIOLATED missing on implicit type arguments
• KT-76477 Kotlin/Native: fix compiler performance reporting in sources->klib and klibs->binary
• KT-79866 kotlinc 2.2.0 silently emits 'NonExistentClass' instead of reporting an error
• KT-78666 "Platform declaration clash" caused by indy lambda name generation which generates conflicting names
• KT-80285 IJ monorepo: broken compilation after 2.2.20-RC update
• KT-79442 "Multiple annotations of type kotlin.coroutines.jvm.internal.DebugMetadata": 2.2.0-Beta1 generates broken code with JVM default suspend methods in interfaces
• KT-78589 "Class does not have member field" caused by delegation from a Java to Kotlin class
• KT-79816 Java Interfaces implemented by delegation have non-null return checks
• KT-78097 False positive NO_ELSE_IN_WHEN on sealed interface with negative is check
• KT-77182 A function in a file annotated with @file:MustUseReturnValue doesn't produce a warning when it is used from compiled code
• KT-79085 Adding -Xreturn-value-checker=full to kotlinc causes "error: conflicting overloads"
• KT-75268 K2: Implement the new compilation scheme for MPP (compiler part)
• KT-78843 FIR tree: comments within String concatenation aren't visited in 2.2.0
• KT-77401 [FIR] ParameterNameTypeAttribute.name doesn't support @ParameterName with compile-time constant property argument
• KT-73611 Remove -Xextended-compiler-checks in favor of a deprecation cycle
• KT-79276 Dexing fails with "Cannot read field X because <local0> is null" with 2.2.0
• KT-79781 Missing MISSING_DEPENDENCY_CLASS when using type alias with inaccessible RHS
• KT-78621 false-positive type mismatch error on value of nullable type as value of platform type
• KT-79547 "UnsupportedOperationException: Not supported" with inlining and value classes
• KT-52706 Bad signature for generic value classes with substituted type parameter
• KT-79519 Nested type alias is unreachable from another module
• KT-76839 False-negative MISSING_DEPENDENCY_CLASS on parameter of data class constructor
• KT-78352 False-positive IDENTITY_SENSITIVE_OPERATIONS_WITH_VALUE_TYPE when comparing with equality operator (==)
• KT-78815 Symbol not found: __ZNSt3__117bad_function_callD1Ev error on iOS 15.5 simulator in Xcode 16.3 after update to 2.2.0-Beta2
• KT-25341 NOT_YET_SUPPORTED_IN_INLINE reported over anonymous object border
• KT-77099 'all' annotation target is not a soft keyword
• KT-76478 FIR: Implement IDE-only checker for types exposed in inline function
• KT-79355 Failed to fix the problem of desugared inc with new reverse implies returns contract
• KT-79277 Implies returns contract doesn't affect the return type of the function if it is in the argument position
• KT-79271 Implies returns contract doesn't impact exhaustiveness
• KT-79218 SMARTCAST_IMPOSSIBLE for top‑level extension‑property getter despite returnsNotNull contract
• KT-79220 returnsNotNull contract ignored on extension function with nullable receiver
• KT-79354 IllegalStateException: Debug metadata version mismatch. Expected: 1, got 2 with compiler 2.2.20-Beta1 and stdlib 2.2.0
• KT-78479 IR lowering failed / Unexpected null argument for composable call
• KT-77986 K2: False negative: "Local classes are not yet supported in inline functions"
• KT-79076 'IllegalStateException: Cannot serialize error type: ERROR CLASS: Uninferred type' with Exposed column using recursive generic type
• KT-78726 Split runPsiToIr phase into runPsiToIr and runIrLinker
• KT-77672 K/N: come up with a fallback strategy for the casts optimization pass
• KT-76365 K2: Missing ABSTRACT_SUPER_CALL
• KT-76585 K2: RETURN_IN_FUNCTION_WITH_EXPRESSION_BODY is not reported inside initializers of local variables
• KT-79099 K2: Do not inherit inline modifier
• KT-76902 Omit type-use annotations from diagnostics
• KT-64499 Report error on overloading by order of context parameters
• KT-58988 K2: Deprecate exposing package-private parameter of internal method
• KT-77199 OPT_IN_USAGE_ERROR is still absent when calling the enum primary constructor
• KT-72800 K2: java.util.NoSuchElementException when introduce variable
• KT-79056 Add experimental language version 2.5
• KT-17460 Diagnostics and intention on suspend function that is overriden with non-suspend one.
• KT-78351 Plugins: VIRTUAL_MEMBER_HIDDEN caused by FirSupertypeGenerationExtension
• KT-78527 No LESS_VISIBLE_TYPE_ACCESS_IN_INLINE_WARNING is reported when a private companion object is accessed via the class name
• KT-79045 FirExpectActualMatcherTransformer should not visit bodies
• KT-74570 K2: Linenumber for annotation on property is present in LVT
• KT-74569 K2: Linenumber of annotation is present in constructor's LVT
• KT-64731 K2: Annotation on inline function or inside inline function is hit by debugger
• KT-77756 Add experimental language version 2.4
• KT-78837 linkReleaseFrameworkIosArm64: Compilation failed: An interface expected but was Any
• KT-78945 CONTRACT_NOT_ALLOWED is not reported for local operator functions
• KT-78944 ANNOTATION_IN_CONTRACT_ERROR is not reported for operators and property accessors with contracts
• KT-78943 ERROR_IN_CONTRACT_DESCRIPTION is not reported for operators and property accessors with contracts
• KT-78932 Contracts are allowed for open and overridden property accessors
• KT-77203 FIR: Consider adding destructured type to all COMPONENT_FUNCTION_* diagnostics
• KT-76635 Implement Data-Flow Based Exhaustiveness Support
• KT-78805 K2: False positive METHOD_OF_ANY_IMPLEMENTED_IN_INTERFACE
• KT-78651 No need to report LESS_VISIBLE_TYPE_ACCESS_IN_INLINE_WARNING in noinline default value lambda
• KT-78849 K2: [Wasm, Fir2IR] Invalid smartcast on overloaded function call
• KT-78793 Make feature AllowEagerSupertypeAccessibilityChecks experimental
• KT-78736 Missing [NOT_YET_SUPPORTED_IN_INLINE] diagnostics because of incorrect context update
• KT-78324 K2: False negative [INCONSISTENT_TYPE_PARAMETER_VALUES]
• KT-69975 KDoc: cannot reference elements with names in backticks
• KT-78229 KDoc: unable to reference a method with spaces in the name
• KT-78047 Render unnamed context parameters as _ instead of <unused var>
• KT-74621 Debugger: AssertionError on evaluating two suspending calls
• KT-78784 Improve deprecation warnings about KTLC-284
• KT-76826 New inference error [NewConstraintError at Incorporate TypeVariable] caused by recursive generics and nullable expected type
• KT-77685 "IllegalArgumentException: Sequence contains more than one matching element"
• KT-78028 "FirNamedFunctionSymbol" leaks to the error message about missing infix modifier
• KT-77245 Add expression name to RETURN_VALUE_NOT_USED diagnostic
• KT-78071 False-positive NO_ELSE_IN_WHEN after variable reassignment
• KT-78068 False-positive NO_ELSE_IN_WHEN after excluding enum value with inequality check
• KT-71134 Consider to get rid of CapturedTypeMarker.withNotNullProjection()
• KT-77131 getValue/setValue can be declared with more than two/three parameters
• KT-78452 Drop redundant frontend structures after fir2ir conversion
• KT-78458 Don't populate PredicateBasedProvider if no lookup predicates are registered
• KT-78440 Lambda with an implicitly runtime-retained annotation is generated via invokedynamic with -Xindy-allow-annotated-lambdas=false
• KT-77709 Missing diagnostics of accessing less visible objects in inline function
• KT-77577 False positive exposed type warnings
• KT-77095 FIR: Report warnings on exposure of references to invisible references in inline functions
• KT-76981 Move exposed type checker to regular checkers
• KT-78252 ClassCastException when Array<Void> used for compile-time vararg of Nothing
• KT-77713 Context Parameters cause compiler generate r8 incompatible bytecode
• KT-71854 K2 IDE. False positive red code because of external annotation on a generic parameter
• KT-67335 K2: Infers Int instead of Long for an ILT
• KT-76629 K2 Mode: False positive RedundantVisibilityModifier inspection on private constructors in sealed classes
• KT-77728 Drop controversial experimental checkers
• KT-78429 K2: Property callable reference incorrectly smart-casted to intersection of property type and KProperty
• KT-78509 Renamed for override copy functions are cached in scope instead of session
• KT-17417 Loops in delegation: no compilation error on non-abstract class with abstract method that never implemented
• KT-75033 Split JvmBackendPipelinePhase to be able to provide a custom implementation of writeOutputs
• KT-75831 K2: An extra "[VALUE_PARAMETER_WITHOUT_EXPLICIT_TYPE] An explicit type is required on a value parameter." for a missing parameter
• KT-78370 All the [something]Assign operators on dynamic return Unit as a type
• KT-73950 K2 IDE / Kotlin Debugger: ISE “Fake override should have at least one overridden descriptor” on evaluation of local calss in presence of bystander
• KT-78280 Implement the sourceless KtDiagnostics
• KT-76543 Migrate psi2ir sources to new IR parameter API
• KT-77716 Kotlin/Native and -Xseparate-kmp-compilation: "Compilation failed: Several functions kotlin/native/immutableBlobOf found"
• KT-76400 Context-sensitive resolution doesn’t work in if-else condition passed as a function argument
• KT-76606 Enable 'Indy: Allow lambdas with annotations' by default
• KT-76739 Dubious argument type mismatch "actual type is 'String', but 'String' was expected" caused by wrong number of type arguments
• KT-78121 Report warning on function type with multiple implicit values that's annotated with DSL marker
• KT-76872 Anonymous context parameters are not visible in debugger
• KT-74088 Kotlin Debugger: CCE on evaluating private suspend function
• KT-77301 False positive Context Parameter resolution when using DslMarker
• KT-78230 Add more test cases to the holdsIn contracts
• KT-78111 K2: Approximation of captured star projection in function type produces Function1<Nothing?, Unit> in IR
• KT-77273 K/N: Remove the kotlin.native.internal.Ref class from the standard library
• KT-73995 JVM bytecode: Bad name for value class field
• KT-73013 Kotlin Debugger: ISE “No mapping for symbol: VALUE_PARAMETER” on evaluating callable reference to local function with closure in it
• KT-77665 K2: unresolved annotatation on local context parameter type
• KT-77485 Add constraints logging to inference
• KT-76504 Find and deprecate actively used parts of K1 API
• KT-75338 K2 Mode: False positive "Redundant assignment" diagnostic on variable captured by local function
• KT-77648 K2: False negative DSL_SCOPE_VIOLATION when using named argument for lambda with annotated function type
• KT-77355 Report warning on overloading by a superset of another overload's context parameters
• KT-77354 Report warning on overloading by a subtype of another overload's context parameter
• KT-78084 Unify deprecation warning messages
• KT-76776 @MustUseReturnValue doesn't affect nested scopes
• KT-77545 @NoInfer on receiver type leads to false positive type mismatch when generic type is specified explicitly and closest implicit receiver is of incorrect type
• KT-76772 @NoInfer on a context parameter's type leads to a false-positive context argument ambiguity error regardless of the closest implicit values' types if there are multiple of them at the call site
• KT-76771 @NoInfer on context parameter type leads to a false-positive type mismatch when generic type is specified explicitly and closest implicit value at the call site is of a mismatching type
• KT-77156 INITIALIZATION_BEFORE_DECLARATION is not reported in anonymous object
• KT-78060 UNRESOLVED_REFERENCE in fp-space
• KT-67555 Debug metadata: map the Continuation label to the next executable location in file
• KT-77723 Refine the message for ArrayEqualityCanBeReplacedWithEquals checker
• KT-75178 Inline functions in conjunction with @JvmStatic may result in bytecode errors
• KT-77390 Prototype lazy loading of stdlib symbols in Native
• KT-77921 False positive EXTENSION_SHADOWED_BY_MEMBER when member has context parameters
• KT-77895 false-negative error on package directives with context parameter lists (even with context parameters disabled)
• KT-76767 AMBIGUOUS_CONTEXT_ARGUMENT should report the name of the context parameter in addition to the type
• KT-77444 K2: False negative "Unchecked cast" with casting from MutableList<out T> to MutableList<T>
• KT-63348 K2: FIR2IR should properly pass expected types
• KT-77627 K2: consider getting rid of NEW_INFERENCE_ERROR
• KT-75833 K2: Extra [ANNOTATION_ARGUMENT_MUST_BE_CONST] when passing regex-like strings as annotation arguments
• KT-77547 Native: add a check that the logic looking for stdlib-related bitcode is not used when compiling sources to a klib
• KT-77206 Remove PARAMETER_NAME_CHANGED_ON_OVERRIDE suppression in KMP lexers
• KT-77679 Update syntax-api dependency in KMP Kotlin parser
• KT-77705 K2: Consuming data class compiled with kotlin 1.0.5 breaks the K2 compiler
• KT-76583 CCE: suspend lambda attempts to unbox value class parameter twice after lambda suspended
• KT-76663 KJS: KotlinNothingValueException caused by expression return since 2.1.20
• KT-75457 Native: cache machinery uses stdlib cache with default runtime options even if custom runtime options are supplied when partial linkage is disabled
• KT-77563 False-positive smart cast with captured local in init block causes NPE
• KT-77696 ISE "couldn't find inline method" on kotlin/Result compiled by old Kotlin version
• KT-76931 K2: Annotation on do-while expression captures variables from inside the loop
• KT-77183 Metadata: remove multi-field value class representation
• KT-77678 Apply found optimization to Kotlin KMP parser
• KT-60127 K2: Support scripts with LightTree-based raw FIR building
• KT-76615 K2: "IllegalArgumentException: Inline class types should have the same representation: Lkotlin/UByte; != B" for mixed Java/Kotlin code
• KT-77220 Annotation with EXPRESSION is not allowed on lambdas in Kotlin 2.2.0
• KT-77656 K/N: fix the super type for local delegated properties
• KT-75907 Inference/PCLA: consider storing semi-fixed variables in inference session
• KT-77144 Implement KMP Kotlin parser
• KT-77352 Implement KMP Expression parser
• KT-76984 SYNCHRONIZED_BLOCK_ON_JAVA_VALUE_BASED_CLASS isn't reported for primitive wrapper classes instantiated within the scope
• KT-67471 K2: "Unresolved reference" on incorrect term of FQ name
• KT-77269 [K/N] external calls checker crashes when used with caches
• KT-77205 Kotlin Debugger / Context Parameters: CCE “class FirPropertySymbol cannot be cast to class FirFunctionSymbol” on evaluating class property
• KT-74133 FIR: use EmptyDeprecationsPerUseSite consistently in symbols
• KT-77100 java.lang.Void type is not ignorable
• KT-77491 K2: No SUPERTYPE_IS_EXTENSION_FUNCTION_TYPE when using typealias
• KT-77490 Report error on contextual function type in supertype
• KT-77431 Functional type with a context is allowed as an upper-bound
• KT-77432 Context isn't passed properly when functional type with a context is used as a type argument
• KT-77417 There is no TYPE_VARIANCE_CONFLICT_ERROR when 'out' type is used in context
• KT-62631 Improve expect-actual "checking" incompatibilities reporting
• KT-77481 Support ExpectRefinement feature in HMPP compilation scheme
• KT-77268 Make sure that -Xreturn-value-checker also enables -XX:UnnamedLocalVariables
• KT-65719 K1/K2: Nullness defaults from subclass unsoundly applied to method in superclass
• KT-53836 In type-parameter declarations, recognize JSpecify annotations only on bounds
• KT-73658 JSpecify @NonNull annotation on type-parameter bound prevents type-variable usages from being platform types
• KT-77000 Leave ForbidInferOfInvisibleTypeAsReifiedOrVararg as a warning
• KT-74084 K2: False negative [NO_ELSE_IN_WHEN]
• KT-77451 FirLazyResolveContractViolationException for test with overridden delegate
• KT-77397 Report UNSUPPORTED_CONTEXTUAL_DECLARATION_CALL when calling declaration with contextual function type in signature
• KT-77137 K2: Controversial behavior allows resolving annotation arguments on a companion inside it
• KT-77257 Report compilation error when in generated JVM bytecode there is a need for CHECKCAST of the conditional expression to the inaccessible interface
• KT-77256 Report compilation error when in generated JVM bytecode there is a need for CHECKCAST of the functional call result to the inaccessible interface
• KT-76356 K2 evaluation fails on evaluating inline methods if there is an inline with AutoCloseable
• KT-73786 Evaluator: cannot evaluate inline methods with reified parameter
• KT-77204 Native: XCode strip command causes flaky tests
• KT-77351 Implement KMP KDoc parser
• KT-76914 compile-time failure on a type argument placeholder in a callable reference
• KT-76597 False negative opt-in required on delegated constructor call
• KT-76667 Mark the class implementation of interface function with ACC_BRIDGE in the class file
• KT-77181 K2: a nested typealias annotation observes member declarations of the outer class
• KT-77180 K2: Wrong scope for annotation arguments in the constructor header
• KT-77287 Try enforcing source != null when origin == Source
• KT-76135 K2: drop pre-1.8 language features from compiler code
• KT-77231 Reflection: CCE on resuming coroutine after callSuspend if result is a generic inline class substituted with primitive
• KT-77031 Investigate the actual need of deduplicating provider in HMPP compilation scheme
• KT-77050 Implement KMP KDoc lexer
• KT-77048 Implement KMP Kotlin lexer
• KT-77044 Consolidate, refine and update jFlex dependency
• KT-77252 It is impossible to declare an unnamed variable in a script
• KT-58137 K2: ISE "Usage of default value argument for this annotation is not yet possible" when instantiating Kotlin annotation with default parameter from another module
• KT-77140 Protect ConstraintSystemCompletionMode.UNTIL_FIRST_LAMBDA with opt-in
• KT-76898 K2: ClassCastException when data class shadows supertype's componentX method with wrong type
• KT-75695 Bogus "Assigned value is never read" warning for prefix ++ operator
• KT-76805 Wrong NPE occurs when assigning synthetic properties with platform types in Kotlin 2.1.20
• KT-77078 K2: anonymous object is wrongly allowed to implement interfaces by unsafe Delegation
• KT-72722 Treat 'copy' calls of a data class as explicit constructor usages
• KT-77149 IllegalArgumentException: source must not be null
• KT-76806 K2: AIOOBE in FirEqualityCompatibilityChecker
• KT-72391 KJS: (a * b).toDouble_ygsx0s_k$ is not a function
• KT-76950 K2: "IllegalArgumentException: Inline class types should have the same representation: Lkotlin/UByte; != B" with nullable UByte
• KT-76043 Native: NotImplementedError: Generation of stubs for class org.jetbrains.kotlin.ir.symbols.impl.IrFieldSymbolImpl is not supported yet
• KT-77126 Transitive dependency mismatch between Kotlin Gradle Plugin and Scripting dependencies
• KT-72831 ANNOTATION_USED_AS_ANNOTATION_ARGUMENT missing in some cases in K2
• KT-73707 Remove dependency on ":compiler:backend.jvm" from Native
• KT-75499 CheckerContext#{containingDeclaration, containingFile} in checkers should return symbols
• KT-76548 False positive TYPE_MISMATCH when resolving an expression with the expected type from the upper bound
• KT-76142 K2: @RequiresOptIn warning does not display the custom message when using concatenated strings.
• KT-68699 Kotlin Debugger: UPAE “lateinit property parent has not been initialized” on trying evaluate enumValues<T>(), enumEntries<T>() from inlined function with reified parameter
• KT-63267 K2: incorrect line numbers after smart cast of an extension receiver
• KT-71309 Kotlin Debugger: UnsupportedOperationException on calling method with reified type parameter
• KT-74912 K2: Investigate irrelevant ARGUMENT_TYPE_MISMATCH on top-level lambdas
• KT-74657 K2: Linenumber for annotation on local variable is present in LVT
• KT-76749 NONE_APPLICABLE message is unreadable for stdlib context function
• KT-74932 Investigate false-negative ARGUMENT_TYPE_MISMATCH on a nested anonymous function
• KT-74545 Redundant TYPE_MISMATCH in variable initializer with call
• KT-76774 K2: Simplify ResolutionMode.WithExpectedType contracts
• KT-76689 Unnamed local variable with type and without initializer is allowed
• KT-76746 ClassCastException: class org.jetbrains.kotlin.fir.types.impl.FirUserTypeRefImpl cannot be cast to class
• KT-76754 K2: Compiler doesn't check annotations on array literals (as annotation arguments)
• KT-76674 The function isn't called from unnamed local variable initializer
• KT-75553 MISSING_DEPENDENCY_SUPERCLASS and MISSING_DEPENDENCY_SUPERCLASS_WARNING is reported at the same time on the same element
• KT-76345 Enhance variable fixation
• KT-73348 AssertionError from isCompiledToJvmDefault on super call of suspend function with composable function parameter
• KT-72305 K2: Report error when using synthetic properties in case of mapped collections
• KT-73527 Prohibit (via a deprecation warning) accessing nested class through generic outer class
• KT-59886 K2: Disappeared ERROR_IN_CONTRACT_DESCRIPTION
• KT-61227 Definitely non-nullable types cause "Any was expected" for @Nullable parameter
• KT-57911 K2: Contracts are not inherited by substitution overrides
• KT-47398 'null' EnhancedNullability value in String-based 'when' might produce different behavior depending on whether 'when' is "optimized" or not

Compose compiler

• CMP-7505 IrLinkageError: Function can not be called: No function found for symbol
• b/432262806 Fix target description lookup
• b/436870733 Prevent lambda memoization in local classes inside a composable
• b/432485982 Fix AbstractMethodError when overriding function with default parameters
• b/432262806 Use classId as FirApplierInferencer tokens
• b/400371006 Gate default parameters behind language versions
• b/245673006 Specify fqName for classes and functions in build metrics
• b/254577243 Avoid printing complex expressions in compiler metrics
• b/394891628 Allow specifying target version of Compose runtime
• b/424454512 Recreate FirApplierInferencer for each check
• b/417406922 Restrict references to @Composable properties
• b/282135108, b/349866442 [Compose] Enable applier checking when using FIR
• b/307592552 Add BigInteger and BigDecimal to the list of known stable classes
• b/414547195 Unwrap type casts when inferring @Composable call arguments

IR. Inlining

New Features

• KT-70360 KLIBs: Uniformly handletypeOf() calls at 1st/2nd stages of compilation

Fixes

• KT-79002 [Inliner][Native][PL] Native backend fails for inline function that instantiates a class that was compiled implementing two interfaces, which turned into abstract classes
• KT-78137 Review & enable PL tests with enabled IR inliner
• KT-72464 [Native][JS][Wasm] Non-local return through suspend conversion breaks the IR inliner
• KT-69941 Rewrite DumpSyntheticAccessors lowering to test handler after moving common Native/JS prefix to KLIB compilation
• KT-78245 Synthetic Accessors incorrectly copies default values
• KT-76236 Include NativeInliningFacade and JsIrInliningFacade in all Native & JS test runners
• KT-76512 Avoid using originalFunction inside FunctionInlining
• KT-69457 [references] IR Inliner: References to inline functions are not inlined
• KT-47521 Native & JS: Recursive inline fun calls -> StackOverflowError
• KT-76425 Do not store signatures of preprocessed inline functions in KLIBs
• KT-76763 [Inliner] Don't use attributeOwnerId to pass info from Inliner to non-JVM backends
• KT-77102 [Inliner] Expression uses unlinked type parameter symbol
• KT-76145 Enhance error message about poisoned KLIBs in KLIB-based compilers
• KT-77079 IR: Report warnings on exposure of references to invisible declarations in inline functions
• KT-69797 [references] Accessors for private function/constructor/property references are not generated
• KT-76454 Investigate erasure of class type parameters during inliner
• KT-72593 [K/N] Add NativeIrInliningFacade to CrossCompilationIdentityTest
• KT-70969 IR Inliner: Ensure that common prefix at 1st phase does not affect KLIB signatures
• KT-75937 [IR Inliner] Umbrella for failing tests due to public inliner
• KT-77295 Improve Diagnostic Message Formatting for Private API Exposure in Inline Functions
• KT-77047 Ir Ininler: crash on fake override in private class from more visible class
• KT-77336 [references] Synthetic accessor test for private top-level function accessed via reference fails with No function found for symbol
• KT-76761 [Inliner] non-JVM IR Inliner incorrectly uses K/JVM-specific code
• KT-76712 [Inliner] No function found for symbol '/<unknown name>|?'
• KT-76711 [Inliner] Reference to function 'privateMethod' can not be evaluated

IR. Tree

• KT-77508 K/JS and K/Native CompilationException Wrong number of parameters in wrapper
• KT-78978 PL tests: Drop adjust*forLazyIr() hack
• KT-76813 IR validator: not all symbols/references are visited
• KT-77596 Refine reuseExistingSignaturesForSymbols setting in IR serializer
• KT-76723 IR validator: Check visibilities of annotations
• KT-76405 Visit annotations in IrTypeVisitor and IrTreeSymbolsVisitor
• KT-78033 [PL] Merge IrUnimplementedOverridesStrategy to PartiallyLinkedIrTreePatcher

JVM. Reflection

• KT-77882 kotlin-reflect: KParameter.name returns "<unused var>" instead of null for anonymous context parameters
• KT-77879 kotlin-reflect: toString overrides of KCallable implementations do not render context parameters
• KT-74529 Context parameters support in reflection
• KT-52170 Reflection: typeOf<Array<Long>> gives classifier LongArray
• KT-77663 Reflection: java.util.ServiceConfigurationError: "module kotlin.reflect does not declare uses" when using kotlin-reflect in modular mode

JavaScript

New Features

• KT-79222 K/JS: Allow using Long in exported declarations
• KT-79394 Add the possibility to write common external declarations between JS and WasmJS targets
• KT-70486 K/JS: exported exception types should extend Error
• KT-19016 Define accessors as enumerable

Performance Improvements

• KT-57128 KJS: Use BigInt to represent Long values in ES6 mode
• KT-54689 KJS: Data class equals less efficient than manually written version

Fixes

• KT-69297 Deprecate referencing inlineable lambdas in js() calls
• KT-77620 Fix failing IC tests on Windows
• KT-77372 KJS: NullPointerException at JsIntrinsics$JsReflectionSymbols
• KT-78316 KJS: List is not exported to TypeScript declaration if wrapped in Promise
• KT-79644 BigInt enabled for ES 2015 despite being an ES 2020 feature
• KT-79089 KJS: Could not load reporter / Cannot find module 'mocha' when running jsNode tests
• KT-79916 K/JS: "Uncaught TypeError" when using 'Xes-long-as-bigint' in compose-html
• KT-79050 KJS / IC: "Unexpected body of primary constructor for processing irClass"
• KT-79977 KJS: Long.rotateLeft returns incorrect result when BigInts are enabled
• KT-76093 Support new callable reference nodes in partial linkage in Kotlin/JS
• KT-78073 K/JS: KProperty from local delegate changes after another delegate is invoked
• KT-52230 KSJ IR: Applying identity equality operator to Longs always returns false
• KT-6675 KotlinJS: toInt() on external Long throws error
• KT-79184 K/JS: Further intrinsify BigInt-backed Long operations
• KT-78701 Js and Wasm: enumValueOf does not include invalid value into an exception message
• KT-55256 KJS: non-exported subclass with a no-parameter function overload doesn't compile
• KT-76034 passProcessArgvToMainFunction contains the node path and script path
• KT-66091 KJS, WASM: AssertionError: Illegal value: <T> in test nonReified_equality.kt
• KT-78169 KJS: [NON_EXPORTABLE_TYPE] with @JsExport class if @JsStatic companion method returns an out type
• KT-57192 KJS: "Exported declaration uses non-exportable return type" caused by @JsExport Promise with Unit type
• KT-61183 KJS: "AssertionError: Assertion failed" from JsSuspendFunctionsLowering
• KT-59326 KJS / IR: invalid code generated when using constructor parameter named default
• KT-70295 KLIB stdlib: Unify intrinsics for boxing captured variables in lambdas across non-JVM backends
• KT-77021 CompilationException: Encountered a local class not previously collected on inner classes inside anonymous objects
• KT-77320 KJS: Big.js times() is compiled to multiply (*) operator
• KT-77430 K/JS: Remove sharedBox* intrinsics from the standard library
• KT-73267 KJS: IC: "FileNotFoundException": Build failures with Kotlin 2.1-RC and RC2
• KT-76912 KJS: @JsStatic can't be used for companion objects implementing external interfaces
• KT-77271 KJS / Serialization: "Cannot set property message of Error which has only a getter"
• KT-77242 Kotlin/JS & Kotlin/Wasm backends: Artificially apply reverse topo-order after IR linkage
• KT-77649 KJS: es-arrow-functions requires explicit opt-in when target is ES2015
• KT-76235 [JS] Extra invalid line tmp_0.tmp00__1 = Options; in testSuspendFunction()
• KT-76234 [JS] Extra invalid line Parent in testNested()
• KT-76233 [JS] Extra invalid import line in testJsQualifier()
• KT-77190 Migrate JS diagnostic tests to the new CLI-based test facades (1st phase only)
• KT-77418 KJS: cannot debug with whole-program granularity
• KT-77371 [K/N][K/JS][K/Wasm] Unify visibility rules for generated default argument stubs
• KT-77148 KJS: "Uncaught TypeError: (intermediate value).l(...).m is not a function" during production build run
• KT-77193 Migrate JS irText tests to the new CLI-based test facades (1st phase only)
• KT-77192 Migrate JS ABI reader tests to the new CLI-based test facades (1st phase only)
• KT-77187 Migrate JS box tests to the new CLI-based test facades (1st phase only)
• KT-77027 Migrate 1st phase facades to the phased CLI infrastructure in JS tests
• KT-69591 KJS / d.ts: Wrong type of SerializerFactory for abstract classes
• KT-76027 KJS: "ReferenceError: entries is not defined": Accessing entries of an enum arbitrarily fails with println()
• KT-76232 Suspend contextual function with extension receiver results in wrong values at runtime in JS
• KT-42305 KJS / IR: "Class constructor is marked as private" @JsExport produces wrong TS code for sealed classes
• KT-52563 KJS / IR: Invalid TypeScript generated for class extending base class with private constructor

Klibs

New Features

• KT-78699 Compiler (JS, Wasm): warn about incompatible kotlin-test/compiler pair
• KT-78700 Compiler (JS, Wasm): Consider making diagnostics for incompatible kotlin-stdlib/compiler and kotlin-test/compiler pairs errors instead of warnings
• KT-74815 KLIB resolver can't consume metadata klibs between source sets when abi_versions diverge
• KT-68322 Compiler (JS, Wasm): warn about incompatible Kotlin stdlib/compiler pair

Fixes

• KT-78168 K/N: "IndexOutOfBoundsException: Index 3 out of bounds for length 3" for iOS build with Kotlin 2.2.0-RC2
• KT-75766 PL: Error on building fake override with multiple overridden members with unbound symbols in return type
• KT-75757 PL: Error on building fake overrides with unbound symbols in value parameters
• KT-76094 Support new callable reference nodes in partial linkage in Kotlin/Wasm
• KT-78771 KLIBs: Improve zipDirAs() function that is used to produce KLIB (ZIP) archives
• KT-75980 [Klib] Reduce serialized size of IrFileEntries for sparse usage of another source files
• KT-78349 [Tests] Enable Partial Linkage in all tests
• KT-76827 KLIB cross-compilation tests: Don't use IR hashes and metadata hashes in test data
• KT-76266 Move trigger of :tools:binary-compatibility-validator:check to native/native.tests/klib-ir-inliner
• KT-76725 KLIB ABI export in older version: Restore legacy directories
• KT-76061 Add option for suppress warning of missing no-existent transitive klib dependencies
• KT-76471 Partial linkage: add an attribute if a class is invalid
• KT-75192 KLIB reader tends to extract files from the KLIB archive to a temporary directory even when this is not needed

Language Design

• KT-78866 Warn implicit receiver shadowed by context parameter
• KT-54363 Allow using reified types for catch parameters
• KT-32993 Contract to specify that a function parameter is always true inside lambda
• KT-79308 Ability to actualize empty interfaces as Any
• KT-8889 Contracts: if a given function parameter is not null, the result is not null
• KT-22786 Returns are not allowed for expression-body functions and are allowed when an inline lambda is added
• KT-77836 Support using context parameter of a @RestrictsSuspension type as the "restricted coroutine scope"
• KT-77823 Context-sensitive resolution doesn't work for subtypes of sealed types
• KT-75977 False positive unresolved_reference when resolving nested member after a type check
• KT-73557 Allow refining expect declarations for platform groups

Libraries

New Features

• KT-76389 Provide update functions for common atomics
• KT-78581 Add the KClass.isInterface property to Kotlin/JS stdlib
• KT-34132 Contract for ClosedRange<T>.contains(T?) operator
• KT-73853 Provide vararg constructors for Atomic Arrays

Fixes

• KT-71628 Review deprecations in stdlib for 2.1
• KT-76773 stdlib: contextOf's type argument can be inferred via contextOf's context argument
• KT-79489 Generate Stdlib API reference for webMain source set
• KT-79080 Annotate WasmImport and WasmExport as experimental API
• KT-79121 K/Wasm annotate JS-interop API as experimental
• KT-78710 kotlin.wasm and kotlin.wasm.unsafe packages are missing description
• KT-78709 Wasm: KClass.qualifiedName KDoc should reflect the behavior on the target
• KT-78704 CharSequence.subSequence and String.substring behavior with invalid indices differs between targets
• KT-78705 Float.sign and Double.sign behavior for negative zero is not documented
• KT-74543 Support for context parameters in kotlinx-metadata
• KT-78340 String.startsWith KDoc declares invalid exception condition
• KT-78242 Move IrLinkageError to the common non-JVM part of the standard library
• KT-67819 Document collection interfaces contracts

Native

• KT-79075 Stuck on Kotlin_getSourceInfo_core_symbolication
• KT-76178 LLVM Update: symbol '__ZnwmSt19__type_descriptor_t' missing
• KT-78959 Xcode 26: fix GC stress tests
• KT-78734 Finish runtime crash dump generation
• KT-74662 Consider providing a way to enable stack canaries for Kotlin/Native binaries
• KT-77378 [macos] Loading libraries with non resolved paths runs XProtectService
• KT-61549 Kotlin/Native: remove kotlin-native/Interop/JsRuntime
• KT-76563 LLVM Update: numerous "was built for newer 'macOS' version" warnings

Native. Build Infrastructure

• KT-77349 Kotlin/Native: default cache for stdlib is unused

Native. C and ObjC Import

• KT-79571 Xcode 26 beta 4: CInteropKT39120TestGenerated.testForwardEnum failed
• KT-71400 Fix disabled -fmodules testing for stdarg.h

Native. ObjC Export

New Features

• KT-77488 [ObjCExport] Add explicit ObjCBlock parameter name in objc export
• KT-76974 Include conflicting element in objc export warnings
• KT-76338 Native, ObjCExport: Replace name mangling of special method families

Fixes

• KT-55648 Native: produce smaller binaries
• KT-78447 [ObjCExport] Add missing ERROR constructors, align with K1
• KT-78034 ObjCExport: primitive type extension translated as static method
• KT-77781 ObjCExport: support @ObjCName for function parameters and receiver parameters
• KT-77592 KMP plugin uses incorrect Swift name from ObjCName annotation
• KT-77625 ObjCExport: ObjCName annotation adds kotlin name swift_name
• KT-77484 KotlinConf app: Invalid identifiers in ObjCHeader.render
• [KT-77500](https://youtrack.jetbrai

Note truncated.