org.jetbrains.kotlin:kotlin-gradle-plugin-core

Compiler

Analysis & diagnostics

• Combination of open and override is no longer a warning
• KT-4829 Equal conditions in when is now a warning
• KT-6611 "This cast can never succeed" warning is no longer reported for Foo<T> as Foo<Any>
• KT-7174 Declaring members with the same signature as non-overridable methods from Java classes (like Object.wait/notify) is now an error (when targeting JVM)
• KT-12302 abstract modifier for a member of interface is no longer a warning
• KT-12452 open modifier for a member of interface without implementation is now a warning
• KT-11111 Overriding by inline function is now a warning, overriding by a function with reified type parameter is an error
• KT-12337 Reference to a property with invisible setter now has KProperty type (as opposed to KMutableProperty)

Issues fixed

• KT-4285 No warning for a non-tail call when the method inherits default arguments from superclass
• KT-4764 Spurious "Variable must be initialized" in try/catch/finally
• KT-6665 Unresolved reference leads to marking subsequent code unreachable
• KT-9597 NullPointerException during resolution of complicated star projections
• KT-11750 Exceptions when creating various entries with the name "name" in enums
• KT-11998 Smart cast to not-null is not performed on a boolean property in if condition
• KT-10648 Exhaustiveness check does not work when sealed class hierarchy contains intermediate sealed classes
• KT-10717 Type inference for lambda with local return
• KT-11266 Fixed "Empty intersection of types" internal compiler error for some cases
• KT-11857 Fix visibility check for dynamic members within protected method (when targeting JS)
• KT-12589 Improved "infix modifier is inapplicable" diagnostic message
• KT-11679 Erroneous call with argument causes Throwable at ResolvedCallImpl.getArgumentMapping()
• KT-12623 Fix ISE on malformed code

JVM code generation

• KT-5075 Optimize array/collection indices usage in for loop
• KT-11116 Optimize coercion to Unit, POP operations are backward-propagated

Issues fixed

• KT-11499 Compiler crashes with "Incompatible stack heights"
• KT-11943 CompilationException with extension property of KClass
• KT-12125 Wrong increment/decrement on Byte/Char/Short.MAX_VALUE/MIN_VALUE
• KT-12192 Exhaustiveness check isn't generated for when expression returning Unit
• KT-12200 Erroneously optimized away assignment to a property initialized to zero
• KT-12582 "VerifyError: Bad local variable type" caused by explicit loop variable type
• KT-12708 Bridge method not generated when data class implements interface with copy() method
• KT-12106 import static of reified companion object method throws IllegalAccessError

Performance

• Reduced number of IO operation when loading kotlin compiled classes

Сompiler options

• Allow to specify version of Kotlin language for source compatibility with older releases.
  • CLI: -language-version command line option
  • Maven: languageVersion configuration parameter, linked with kotlin.compiler.languageVersion property
  • Gradle: kotlinOptions.languageVersion property in task configuration
• Allow to specify which java runtime target version to generate bytecode for.
  • CLI: -jvm-target command line option
  • Maven: jvmTarget configuration parameter, linked with kotlin.compiler.jvmTarget property
  • Gradle: kotlinOptions.jvmTarget property in task configuration
• Allow to specify path to JDK to resolve classes from.
  • CLI: -jdk-home command line option
  • Maven: jdkHome configuration parameter, linked with kotlin.compiler.jdkHome property
  • Gradle: kotlinOptions.jdkHome property in task configuration

Standard Library

• Improve documentation (including KT-11632)
• List iteration used in collection operations is performed with an indexed loop when the list supports RandomAccess and the operation isn't inlined

IDE

Completion

New features

• Smart completion after by and in
• Improved completion in bodies of overridden members (when no type is specified)
• Improved presentation of completion items for property accessors
• Fixed keyword completion after try in assignment expression
• KT-8527 Include non-imported declarations on the first completion
• KT-12068 Special completion item for "[]" get-operator access
• KT-12080 Parameter names are now higher up in completion list

Issues fixed

• Fixed enum members being present in completion as static members
• Fixed QuickDoc not working for properties generated for java classes
• KT-9166 Code completion does not work for synthetic java properties on typing "g"
• KT-11609 No named arguments completion should be after dot
• KT-11633 Wrong indentation after completing a statement in data class
• KT-11680 Code completion of label for existing return with value inserts redundant whitespace
• KT-11784 Completion for if statement should add parentheses automatically
• KT-11890 Completion for callable references does not propose static Java members
• KT-11912 String interpolation is not converted to ${} form when accessing this.property
• KT-11957 No catch and finally keywords in completion
• KT-12103 Smart completion for nested SAM-adapter produces short unresolved name
• KT-12138 Do not show "::error" in smart completion when any function type accepting one argument is expected
• KT-12150 Smart completion suggests to compare non-nullable with null
• KT-12124 No code completion for a java property in a specific position
• KT-12299 Completion: incorrect priority of property foo over method getFoo in Kotlin-only code
• KT-12328 Qualified function name inserted when typing before if
• KT-12427 Completion doesn't work for "@receiver:" annotation target
• KT-12447 Don't use CompletionProgressIndicator in Kotlin plugin
• KT-12669 Completion should show variant with () when there is default lambda
• KT-12369 Pressing dot after class name should not cause insertion of constructor call

Spring support

New features

• KT-11692 Support Spring model diagrams for Kotlin classes
• KT-12079 Support "Autowired members defined in invalid Spring bean" inspection on Kotlin declarations
• KT-12092 Implement bean references in @Qualifier annotations
• KT-12135 Automatically configure components based on basePackageClasses attribute of @ComponentScan
• KT-12136 Implement package references inside of string literals
• KT-12139 Support Spring configurations linked via @Import annotation
• KT-12278 Implement Spring @Autowired inspection
• KT-12465 Implement Spring @ComponentScan inspection

Issues fixed

• KT-12091 Fixed unstable behavior of Spring line markers
• KT-12096 Fixed rename of custom-named beans specified with Kotlin annotation
• KT-12117 Group Kotlin classes from the same file in the Choose Bean dialog
• KT-12120 Show autowiring candidates line markers for @Autowired-annotated constructors and constructor parameters
• KT-12122 Fixed line marker popup on functions with @Qualifier-annotated parameters
• KT-12143 Fixed "Spring Facet Code Configuration (Kotlin)" inspection description
• KT-12147 Fixed exception on analyzing object declaration with @Component annotation
• KT-12148 Warn about object declarations annotated with Spring @Configuration/@Component/etc.
• KT-12363 Fixed "Autowired members defined in invalid Spring bean (Kotlin)" inspection description
• KT-12366 Fixed exception on analyzing class declaration upon annotation typing
• KT-12384 Fixed bean references in factory method calls

Intention actions, inspections and quickfixes

New features

• New icon for "New -> Kotlin Activity" action
• "Change visibility on exposure" and "Make visible" fixes now support all possible visibilities
• KT-8477 New inspection "Can be primary constructor property" with quick-fix
• KT-5010 "Redundant semicolon" inspection with quickfix
• KT-9757 Quickfix for "Unused lambda expression" warning
• KT-10844 Quick fix to add crossinline modifier
• KT-11090 "Add variance modifiers to type parameters" inspection
• KT-11255 Move Element Left/Right actions
• KT-11450 "Modality is redundant" inspection
• KT-11523 "Add @JvmOverloads annotation" intention
• KT-11768 "Introduce local variable" intention
• KT-11806 Quick-fix to increase visibility for invisible member
• KT-11807 Use function body template when generating overriding functions with default body
• KT-11864 Suggest "Create function/secondary constructor" quick fix on argument type mismatch
• KT-11876 Quickfix for "Extension function type is not allowed as supertype" error
• KT-11920 "Increase visibility" and "Decrease visibility" quickfixes for exposed visibility errors
• KT-12089 Quickfix "Make primary constructor parameter a property"
• KT-12121 "Add toString() call" quickfix
• KT-11104 New quickfixes for nullability problems: "Surround with null check" and "Wrap with safe let call"
• KT-12310 New inspection "Member has platform type" with quickfix

Issues fixed

• Fixed "Convert property initializer getter" intention being available inside lambda initializer
• Improved message for "Can be declared as val" inspection
• KT-3797 Quickfix to make a function abstract should not be offered for object members
• KT-11866 Suggest "Create secondary constructor" when constructors exist but are not applicable
• KT-11482 Fixed exception in "Move to companion object" intention
• KT-11483 Pass implicit receiver as argument when moving member function to companion object
• KT-11512 Allow choosing any source root in "Move file to directory" intention
• KT-10950 Keep original file package name when moving top-level declarations to separate file (provided it's not ambiguous)
• KT-10174 Optimize imports after applying "Move declaration to separate file" intention
• KT-11764 Intention "Replace with a forEach function call should replace continue with return@forEach
• KT-11724 False suggestion to replace with compound assignment
• KT-11805 Invert if-condition intention breaks code in case of end of line comment
• KT-11811 "Make protected" intention for a val declared in parameters of constructor
• KT-11710 "Replace if with elvis operator": incorrect code generated for if expression
• KT-11849 Replace explicit parameter with it changes the meaning of code because of the shadowing
• KT-11870 "Replace with Elvis" refactoring doesn't change the variable type from T? to T
• KT-12069 Specify language for all Kotlin code inspections
• KT-11366 "object Companion is never used" warning in intellij
• KT-11275 Inconsistent behaviour of "move lambda argument out of parentheses" intention action when using lambda calls with function arguments without parentheses
• KT-11594 "Add non-null asserted (!!) call" applied to unsafe cast to nullable type causes AE at KtPsiFactory.createExpression()
• KT-11982 False "Redundant final modifier" reported
• KT-12040 "Replace when with if" produce invalid code for first entry which has comment
• KT-12204 "Use classpath of module" option in existing Kotlin run configuration may be changed when a new run configuration is created
• KT-10635 Don't mark private writeObject and readObject methods of Serializable classes as unused
• KT-11466 "Make abstract" quick fix applies to outer class of object with accidentally abstract function
• KT-11120 Constructor parameter/field reported as unused symbol even if it have used annotation
• KT-11974 Invert if-condition intention loses comments
• KT-10812 Globally unused constructors are not marked as such
• KT-11320 Don't mark @BeforeClass (JUnit4) annotated functions as unused
• KT-12267 "Change type" quick fix converts to Int for Long literal
• KT-11949 Various problems fixed with "Constructor parameter is never used as a property" inspection
• KT-11716 "Simply for using destructuring declaration" intention: incorrect behavior for data classes
• KT-12145 "Simplify for using destructuring declaration" should work even when no variables declared inside loop
• KT-11933 Entities used only by alias are marked as unused
• KT-12193 Convert to block body isn't equivalent for when expressions returning Unit
• KT-10779 Simplify for using destructing declaration: intention / inspection quick fix is available only when all variables are used
• KT-11281 Fix exception on applying "Convert to class" intention to Java interface with Kotlin inheritor(s)
• KT-12285 Fix exception on test class generation
• KT-12502 Convert to expression body should be forbidden for non-exhaustive when returning Unit
• KT-12260 ISE while replacing an operator with safe call
• KT-12649 "Convert if to when" intention incorrectly deletes code
• KT-12671 "Shot type" action: "Type is unknown" error on an invoked expression
• KT-12284 Too wide applicability range for "Add braces to else" intention
• KT-11975 "Invert if-condition" intention does not simplify is expression
• KT-12437 "Replace explicit parameter" intention is suggested for parameter of inner lambda in presence of it from outer lambda
• KT-12290 Navigate to the generated declaration when using "Implement abstract member" intention
• KT-12376 Don't show "Package directive doesn't match file location" in injected code
• KT-12777 Fix exception in "Create class" quickfix applied to unresolved references in type arguments

Language injection

• Apply injection for the literals in property initializer through property usages
• Enable injection from Java or Kotlin function declaration by annotating parameter with @Language annotation
• KT-2428 Support basic use-cases of language injection for expressions marked with @Language annotation
• KT-11574 Support predefined Java positions for language injection
• KT-11472 Add comment or @Language annotation after "Inject language or reference" intention automatically

Refactorings

New features

• KT-6372 Add name suggestions to Rename dialog
• KT-7851 Respect naming conventions in automatic variable rename
• KT-8044, KT-9432 Support @JvmName annotation in rename refactoring
• KT-8512 Support "Rename tests" options in Rename dialog
• KT-9168 Support rename of synthetic properties
• KT-10578 Support automatic test renaming for facade files
• KT-12657 Rename implicit usages of annotation method value
• KT-12759 Suggest renaming both property accessors with matching @JvmName when renaming one of them from Java

Issues fixed

• KT-4791 Rename overridden property and all its accessors on attempt to rename overriding accessor in Java code
• KT-6363 Do not rename ambiguous references in import directives
• KT-6663 Fixed rename of ambiguous import reference to class/function when some referenced declarations are not changed
• KT-8510 Preserve "Search in comments and strings" and "Search for text occurrences" settings in Rename dialog
• KT-8541, KT-8786 Do now show 'Rename overloads' options if target function has no overloads
• KT-8544 Show more detailed description in Rename dialog
• KT-8562 Show conflicts dialog on attempt of redeclaration
• KT-8611 Qualify class references to resolve rename conflicts when possible
• KT-8732 Implement Rename conflict analysis and fixes for properties/parameters
• KT-8860 Allow renaming class by constructor delegation call referencing primary constructor
• KT-8892 Suggest renaming base declarations on overriding members in object literals
• KT-9156 Quote non-identifier names in Kotlin references
• KT-9157 Fixed in-place rename of Kotlin expression referring Java declaration
• KT-9241 Do not replace Java references to synthetic component functions when renaming constructor parameter
• KT-9435 Process property accessor usages (Java) in comments and string literals
• KT-9444 Rename dialog: Allow typing any identifier without backquotes
• KT-9446 Copy default parameter values to overriding function which is renamed while its base function is not
• KT-9649 Constraint search scope of parameter declared in a private member
• KT-10033 Qualify references to members of enum companions in case of conflict with enum entries
• KT-10713 Skip read-only declarations when renaming parameters
• KT-10687 Qualify property references to avoid shadowing by parameters
• KT-11903 Update references to facade class when renaming file via matching top-level class
• KT-12411 Fix package name quotation in Move refactoring
• KT-12543 Qualify property references with this to avoid renaming conflicts
• KT-12732 Copy default parameter values to overriding function which is renamed by Java reference while its base function is unchanged
• KT-12747 Fix exception on file copy

Java to Kotlin converter

New features

• KT-4727 Convert Java code copied from browser or other sources

Issues fixed

• KT-11952 Assertion failed in PropertyDetectionCache.get on conversion of access to Java constant of anonymous type
• KT-12046 Recursive property setter
• KT-12039 Static imports converted missing ".Companion"
• KT-12054 Wrong conversion of instanceof checks with raw types
• KT-12045 Convert Object() to Any()

Android Lint

Issues fixed

• KT-12015 False positive for Bundle.getInt()
• KT-12023 "minSdk" lint check doesn't work for as/is
• KT-12674 "Calling new methods on older versions" errors for inlined constants
• KT-12681 Running lint from main menu: diagnostics reported for java source files only
• KT-12173 False positive for "Toast created but not shown" inside SAM adapter
• KT-12895 NoSuchMethodError thrown when saving a Kotlin file

KDoc

New features

• Support for @receiver tag

Issues fixed

• Rendering of _ and * standalone characters
• Rendering of code blocks
• KT-9933 Indentation in code fragments is not preserved
• KT-10998 Spaces around links are missing in return block
• KT-11791 Markdown links rendering
• KT-12001 Allow use of @param to document type parameter

Maven support

New features

• Inspections that check that kotlin IDEA plugin, kotlin Maven plugin and kotlin stdlib are of the same version
• KT-11643 Inspections and intentions to fix erroneously configured Maven pom file
• KT-11701 "Add Maven Dependency quick fix" in Kotlin source files
• KT-11743 Intention to replace kotlin-test with kotlin-test-junit

Issues fixed

• KT-9492 Configuring multiple Maven Modules
• KT-11642 Kotlin Maven configurator tags order
• KT-11436 "Choose Configurator" control opens dialogs with inconsistent modality (linux)
• KT-11731 Default maven integration doesn't include documentation
• KT-12568 Execution configuration: file path completion works only in some sub-elements of <sourceDirs>
• KT-12558 Configure Kotlin in Project: "Undo" should revert changes in all poms
• KT-12512 "Different IDE and Maven plugin version" inspection is being invoked for non-tracked pom.xml files

Debugger

New features

• KT-11438 Support navigation from stacktrace to inline function call site

Issues fixed

• Do not step into inline lambda argument during step over inside inline function body
• Fix step over for inline argument with non-local return
• KT-12067 Deadlock in Kotlin debugger is fixed
• KT-12232 No code completion in Evaluate Expression and Throwable at CodeCompletionHandlerBase.invokeCompletion()
• KT-12137 Evaluate expression: code completion/intention actions allows to use symbols from modules that are not referenced
• KT-12206 NoSuchFieldError in Evaluate Expression on a property of a derived class
• KT-12678 NoSuchFieldError in Evaluate Expression on accessing delegated property defined in other module
• KT-12773 Fix debugging for Kotlin JS projects

Formatter

Issues fixed

• KT-12035 Spaces around as
• KT-12018 Spaces between function name and arguments in infix calls
• KT-11961 Spaces before angle bracket in method definition
• KT-12175 Don't enforce empty line between secondary constructors without body
• KT-12548 Spaces around is keyword
• KT-12446 Spaces before class type parameters
• KT-12634 Spaces between method name and parenthesis in method call
• KT-10680 Spaces around in keyword
• KT-12791 Spaces between curly brace and expression inside string template
• KT-12781 Spaces between annotation and expression
• KT-12689 Spaces around semicolons
• KT-12714 Spaces around parentheses in enum elements

Other

New features

• Added "Decompile" button to Kotlin bytecode toolwindow
• Added Kotlin "Tips of the day"
• Added "Kotlin 1.1 EAP" to "Configure Kotlin Plugin updates"
• KT-2919 Constructor calls are no longer highlighted as classes
• KT-6540 Infix function calls are now highlighted as regular function calls
• KT-9410 Annotations in Kotlin are now highlighted with the same color as in Java by default
• KT-11465 Type parameters in Kotlin are now highlighted with the same color as in Java by default
• KT-11657 Allow viewing decompiled Java source code for Kotlin-compiled classes
• KT-11704 Support file path references inside of Kotlin string literals
• KT-12076 Kotlin Plugin update check: always display installed version number
• KT-11814 New icon for kotlin annotation classes
• KT-12735 Convert JavaDoc to KDoc when overriding Java class member in Kotlin

Issues fixed

• KT-5960 Can't find usages for Java methods used from Kotlin by call convention
• KT-8362 "New Kotlin file": Keywords should be escaped in package name
• KT-8682 Respect "Copy JavaDoc" option in the "Override/Implement Members..." dialog
• KT-8817 Fixed rename of Java getters/setters through synthetic property references in Kotlin
• KT-9399 Find Usages omits Kotlin annotation parameter usage in Java source
• KT-9797 "Kotlin Bytecode" toolwindow breaks after closing
• KT-11145 Use progress indicator when searching usages in Introduce Parameter
• KT-11155 Allow running multiple Kotlin classes as well as running mixtures of Kotlin and Java classes
• KT-11495 Show recursion line markers for extension function calls with different receiver
• KT-11659 Generate abstract overrides for Any members inside of Kotlin interfaces
• KT-12070 Add empty line in error message of Maven and Gradle configuration
• KT-11908 Allow properties with custom setters to be used in generated equals/hashCode/toString
• KT-11617 Fixed title of Introduce Parameter declaration chooser
• KT-11817 Fixed rename of Kotlin enum constants through Java references
• KT-11816 Fixed usages search for Safe Delete on simple enum entries
• KT-11282 Delete interface reference from super-type list when applying Safe Delete to Java interface
• KT-11967 Fix Find Usages/Rename for parameter references in XML files
• KT-10770 "Optimize imports" will not keep import if a type is only referenced by kdoc
• KT-11955 Copy/Paste inserts fully qualified name when copying function with overloads
• KT-12436 "Replace explicit parameter with it": java.lang.Exception at BaseRefactoringProcessor.run()
• KT-12440 Removing unused parameter results in Exception "Refactorings should not be started inside write action"
• KT-12006 getLanguageLevel is slow for Kotlin light classes
• KT-12026 "Constant expression required" in Java for const Kotlin values
• KT-12259 ClassCastException in light classes while trying to create generic property
• KT-12289 Remove unnecessary ? from serr live template
• KT-12110 Map help button of the Compiler - Kotlin page
• KT-12075 Kotlin Plugin update check: make dumbaware
• KT-10255 call BuildManager.clearState(project) in apply() method of Kotlin Compiler Settings configurable
• KT-11841 New Project / Module wizard, Gradle: pure Kotlin module is created without repositories call in build.gradle
• KT-11095 Java cannot infer generic return type of Kotlin function (with java 8 language level)
• KT-12090 Intellij/Kotlin plugin does not handle generic return type of static method defined in Kotlin, called from Java
• KT-12206 Fix NoSuchFieldError on accessing base property without backing field in evaluate expression
• KT-12516 File Structure: Kotlin annotation classes have Java annotation icons
• KT-11328 "New Kotlin class": generates packages when fully qualified name is specified
• KT-11778 Exception in Lombok plugin: Rewrite at slice FUNCTION
• KT-11708 "Go to declaration" doesn't work on a call to function with SAM conversion on a derived type
• KT-12381 Prefer not-nullable return type when overriding Java method without nullability annotation
• KT-12647 Performance improvement for test-related line markers
• KT-12526 Kotlin intentions increase PSI modification counts from isAvailable, even in daemon threads

Reflection

Issues fixed

• KT-11531 Optimize "KCallable.name"
• KT-10771 Reflection on Function objects does not support lambdas with generic return type
• KT-11824 Reflection inconsistency between member property and accessor

JS

• Improve performance of maps and sets

Issues fixed

• KT-6942 Generate structural equality check (i.e. Any.equals) instead of referential check (===) value equality patterns in when
• KT-7228 Wrong AbstractList signature
• KT-8299 Wrong access to private member in autogenerated code in data class
• KT-11346 Reified functions like filterIsInstance are now available in JS Standard Library
• KT-12305 Incorrect translation of vararg in @native functions
• KT-12254 JsEmptyExpression in initializer when compiling code like val x = throw Exception()
• KT-11960 Wrong code generated when a method of a local class calls constructor of the class
• KT-10931 Incorrect inlining of library method with optional parameters
• KT-12417 Wrong check cast generated for KMutableProperty

Tools

New features

• KT-11839 Maven goal to execute kotlin script

Issues fixed

• KAPT: fix error when using enum constructors with parameters
• Various problems with gradle 2.2 fixed: KT-12478, KT-12406, KT-12478
• KT-12595 JPS: Fixed com.intellij.util.io.MappingFailedException: Cannot map buffer
• KT-11166 Gradle: Unable to access internal classes from test code within the same module
• KT-12352 KAPT: Fix "Classpath entry points to a non-existent location" warnings
• KT-12074 Building Kotlin maven projects using a parent pom will silently fail
• KT-11770 Warning "RuntimeException: Could not find installation home path" when using Gradle Incremental Compilation
• KT-10969 Android extensions: NullPointerException when finding view in Fragment
• KT-11885 Gradle/Android: Unresolved reference "kotlinx" when classpath dependency is defined in root build.gradle
• KT-12786 Deprecation warning with Gradle 2.14

Compiler

Analysis & diagnostics

• KT-7437, KT-7971, KT-7051, KT-6125, KT-6186, KT-11649 Implement missing checks for protected visibility
• KT-11666 Report "Implicit nothing return type" on non-override member functions
• KT-4328, KT-11497, KT-10493, KT-10820, KT-11368 Report error if some classes were not found due to missing or conflicting dependencies
• KT-11280 Do not perform smart casts for values with custom equals compared with ==
• KT-3856 Fix wrong "inner class inaccessible" diagnostic for extension to outer class
• KT-3896, KT-3883, KT-4986 do...while (true) is now considered an infinite loop
• KT-10445 Prohibit initialization of captured val in lambda or in local function
• KT-10042 Correctly handle local classes and anonymous objects in control flow analysis
• KT-11043 Prohibit complex expressions with class literals in annotation arguments
• KT-10992, KT-11007 Fix multiple problems related to smart casts
• KT-11490 Prohibit nested intersection types in return position
• KT-11411 Report "illegal noinline/crossinline" on parameter of subtype of function type
• KT-3083 Report "conflicting overloads" for functions with parameter of type parameter type
• KT-7265 Parse anonymous functions in blocks as expressions
• KT-8246 Handle break/continue for outer loop correctly in case of try/finally in between
• KT-11300 Report error on increment or augmented assignment when get is an operator but set is not
• Report warning about unused anonymous functions
• Improve callable reference type in some ambiguous cases
• Improve multiple diagnostic messages: KT-10761, KT-9760, KT-10949, KT-9887, KT-9550, KT-11239, KT-11819
• Fix several compiler bugs leading to exceptions: KT-9820, KT-11597, KT-10983, KT-10972, KT-11287, KT-11492, KT-11765, KT-11869

JVM code generation

• KT-8269, KT-9246, KT-10143 Fix visibility of protected classes in bytecode
• KT-11363 Fix potential binary compatibility breakage on using when over enums in inline functions
• KT-11762 Fix VerifyError caused by explicit loop variable type
• KT-11645 Fix NoSuchFieldError on private const property in multi-file class
• KT-9670 Optimize Class <-> KClass wrapping/unwrapping when getting values from annotation
• KT-6842 Optimize unnecessary boxing and interface calls on iterating over ranges
• KT-11025 Don't inline const val properties in non-annotation contexts
• KT-5429 Write nullability annotations on extension receiver parameters
• KT-11347 Preserve source file and line number of call site when inlining certain standard library functions
• KT-11677 Write correct generic signatures for local classes in inlined lambdas
• KT-12127 Do not write unnecessary generic signature for property delegate backing field
• Fix multiple issues leading to exceptions or bad bytecode being generated: KT-11034, KT-11519, KT-11117, KT-11479

Java interoperability

• KT-3068 Load contravariantly projected collections in Java (List<? super T>) as mutable collections in Kotlin (MutableList<in T>)
• KT-11322 Do not lose type nullability information in SAM constructors
• KT-11721 Fix wrong "Typechecker has run into recursive problem" error on calling Kotlin get function as synthetic Java property
• KT-10691 Fix wrong "Inherited platform declarations clash" error on inheritance from generic Java class with overloaded methods

Command line compiler

• KT-9546 Flush stdout and stderr before shutdown when executing scripts
• KT-10605 Disable colored output on certain platforms to prevent crashes
• Report warning instead of error on unknown "-X" flags
• Remove the compiler option "Xmultifile-facades-open"

Compiler daemon

• Reduce read disk activity
• Fix compiler daemon JAR cache clearing on IDEA Ultimate

Standard library

• KT-11410 Reduce method count of the standard library by ~2k
• KT-9990 Optimize snapshot operations to return special collection implementations when result is empty or has single element
• KT-10794 EmptyList now implements RandomAccess
• KT-10821 Create at most one wrapper sequence for adjacent drop/take operations on sequences
• KT-11301 Make Map.plus accept Map out-projected by key type as either operand (receiver or parameter)
• KT-11485 Remove implementations of some internal intrinsic functions
• KT-11648 Add deprecated extension MutableList.remove to redirect to valid function removeAt
• KT-11348 kotlin.test: Make inline methods todo and currentStackTrace @InlineOnly not to lose stack trace
• KT-11745 Rename parameters of String.subSequence to match those of CharSequence.subSequence
• KT-10953 Clarify parameter order of lambda function parameter of *Indexed functions
• KT-10198 Improve docs for binarySearch functions
• KT-9786 Improve docs for trimIndent/trimMargin

Reflection

• KT-9952 Improve toString() for lambdas and function expressions when kotlin-reflect.jar is available
• KT-11433 Fix multiple resource leaks by closing InputStream instances
• KT-8131 Fix exception from calling KProperty.javaField on a subclass
• KT-10690 Support javaMethod and kotlinFunction for top level functions in a different file
• KT-11447 Support reflection calls to multifile class members
• KT-10892 Load annotations of const properties from multifile classes
• KT-11258 Don't crash on requesting members of Java collection classes
• KT-11502 Clarify KClass equality

JS

• KT-4124 Support nested classes
• KT-11030 Support local classes
• KT-7819 Support non-local returns in local lambdas
• KT-6912 Safe calls (x?.let { it }) are now inlined
• KT-2670 Support unsafe casts (as)
• KT-7016, KT-8012 Fix is-checks for reified type parameters
• KT-7038 Avoid unwanted side effects on is-checks for nullable types
• KT-10614 Copy array on vararg call with spread operator
• KT-10785 Correctly translate property names and receiver instances in assignment operations
• KT-11611 Fix translation of default value of secondary constructor's functional parameter
• KT-11100 Fix generation of invoke on objects and companion objects
• KT-11823 Fix capturing of outer class' this in inner's lambdas
• KT-11996 Fix translation of a call to a private member of an outer class from an inner class which is a subtype of the outer class
• KT-10667 Support inheritance from nested built-in types such as Map.Entry
• KT-7480 Remove declarations of LinkedList, SortedSet, TreeSet, Enumeration
• KT-3064 Implement CharSequence.repeat

IDE

New features:

• Spring Support
  • KT-11098 Inspection on final classes/functions annotated with Spring @Configuration/@Component/@Bean
  • KT-11405 Navigation and Find Usages for Spring beans referenced in annotation arguments and BeanFactory method calls
  • KT-3741 Show Spring-specific line markers on Kotlin classes
  • KT-11406 Support Spring EL injections inside of Kotlin string literals
  • KT-11604 Support "Configure Spring facet" inspection on Kotlin classes
  • KT-11407 Implement "Generate Spring Dependency..." actions
  • KT-11408 Implement "Generate @Autowired Dependency..." action
  • KT-11652 Rename bean attributes mentioned in Spring XML config together with corresponding Kotlin declarations
• Enable precise incremental compilation by default in non-Maven/Gradle projects
• KT-11612 Highlight named arguments
• KT-7715 Highlight vars that can be replaced by vals
• KT-5208 Intention action to convert string to raw string and back
• KT-11078 Quick fix to remove .java when KClass is expected
• KT-1494 Inspection to highlight public members with no documentation
• KT-8473 Intention action to implement interface or abstract class
• KT-10299 Inspection to warn on array properties in data classes
• KT-6674 Inspection to warn on protected symbols in effectively final classes
• KT-11576 Quick fix to suppress "Unused symbol" warning based on annotations on the declaration
• KT-10063 Quick fix for adding arrayOf wrapper for annotation parameters
• KT-10476 Quick fix for converting primitive types
• KT-10859 Quick fix to make var with private setter final
• KT-9498 Quick fix to specify property type
• KT-10509 Quick fix to simplify condition with senseless comparison
• KT-11404 Quick fix to let type implement missing interface
• KT-6785, KT-10013, KT-9996, KT-11675 Support Smart Enter for trailing lambda argument, try/catch/finally, property setter, init block
• Add kotlinClassName() and kotlinFunctionName() macros for use in live templates
• Auto-configure EAP-repository during Kotlin Maven and Gradle project set up

Issues fixed:

• KT-11678, KT-4768 Support navigation to Kotlin libraries from Java sources
• KT-9401 Support Change Signature quick fix for Java -> Kotlin case
• KT-8592 Fix "Choose sources" for Kotlin files
• KT-11256 Fix Navigate to declaration for Java constructor with @NotNull parameter
• KT-11018 Fix vars shown in Ctrl + Mouse Hover as vals
• KT-5105, KT-11024 Improve incompatible ABI versions editor strap, show the hint on how to resolve the problem
• KT-11638 Fixed hashCode() implementation in "Generate equals/hashCode" action
• KT-10971 Pull Members Up: Always insert spaces between keywords
• KT-11476, KT-4175, KT-10965, KT-11076 Formatter: fix multiple issues regarding space handling
• KT-9025 Improve "Create Kotlin Java runtime library" dialog usability
• KT-11481 Fix "Add import" intention not being available for is branches in when
• KT-10619 Fix completion after package name in annotation
• KT-10621 Do not show non-top level packages after @ in completion
• KT-11295 "Convert string to template" intention: fix exception on certain code
• KT-10750, KT-11424 "Convert if to when" intention now detects effectively else branches in subsequent code and performs more accurate comment handling
• Configure Kotlin: show only changed files in the notification "Kotlin not configured", restore all changed files in undo action
• KT-11556 Do not show "Kotlin not configured" for Kotlin JS projects
• KT-11593 Fix "Configure Kotlin" action for Gradle projects in IDEA 2016
• KT-11077 Use new built-in definition file format (.kotlin_builtins files)
• KT-5728 Remove closing curly brace in a string template when opening one is deleted
• KT-10883 "Explicit get or set call" quick fix: do not move caret too far away
• KT-5717 "Replace 'when' with 'if'": do not lose comments
• KT-10797 "Replace with operator" intention is not available anymore for non-operator functions
• KT-11529 Highlighting range for unresolved annotation name does not include @ now
• KT-11178 Don't show "Change type arguments" fix when there's nothing to change
• KT-11789 Don't interpret annotations inside Markdown code blocks as KDoc tags
• KT-11702 Fixed resolution of Kotlin beans with custom name
• KT-11689 Fixed exception on attempt to navigate to Kotlin file from Spring notification balloon
• KT-11725 Fixed renaming of injected SpEL references
• KT-11720 Fixed renaming of Kotlin beans through SpEL references
• KT-11719 Fixed renaming of Kotlin parameters references in XML files
• KT-11736 Fixed searching of Java usages for @JvmStatic properties and @JvmStatic @JvmOverloads functions
• KT-11862 Fixed bogus warnings about unresolved types in the Change Signature dialog
• Fix several issues leading to exceptions: KT-11579, KT-11580, KT-11777, KT-11868, KT-11845, KT-11486
• Fixed NoSuchFieldException in Kotlin module settings on IDEA Ultimate

Debugger

• KT-11705 "Smart step into" no longer skips methods from subclasses
• Debugger can now distinguish nested inline arguments
• KT-11326 Support private classes in Evaluate Expression
• KT-11455 Fix Evaluate Expression behavior for files with errors in sources
• KT-10670 Fix Evaluate Expression behavior for inline functions with default parameters
• KT-11380 Evaluate Expression now handles smart casts correctly
• KT-10148 Do not suggest methods from outer context in "Smart step into"
• Fix Evaluate Expression for expression created for array element
• Complete private members from libraries in Evaluate Expression
• KT-11578 Evaluate Expression: do not highlight completion variants from nullable receiver with grey
• KT-6805 Convert Java expression to Kotlin when opening Evaluate Expression from Variables view
• KT-11927 Fix "ambiguous import" error when invoking Evaluate Expression from Variables view for some field
• KT-11831 Fix Evaluate Expression for values of raw types
• Show error message when debug info for some local variable is corrupted
• Avoid 1s delay in completion in debugger fields if session is not stopped on a breakpoint
• Avoid cast to runtime type unavailable in current scope
• Fix text with line breaks in popup with line breakpoint variants
• Fix breakpoints inside inline functions in libraries sources
• Allow breakpoints at catch clause declaration
• KT-11848 Fix breakpoints inside generic crossinline lambda argument body
• KT-11932 Fix Step Over for while loop condition

Java to Kotlin converter

• Protected members used outside of inheritors are converted as public
• Support conversion for annotation constructor calls
• Place comments from the middle of the call to the end
• Drop line breaks between operator arguments (except +, -, && and ||)
• Add non-null assertions on call site for non-null parameters
• Specify type for variables with anonymous type if they have write accesses
• KT-11587 Fix conversion of static field accesses from other Java class
• KT-6800 Quote $ symbols in converted strings
• KT-11126 Convert annotations in annotations parameters correctly
• KT-11600 Do not produce unresolved toArray calls for Java Collection#toArray(T[])
• KT-11544 Fix conversion of uninitialized non-final field
• KT-10604 Fix conversion of scratch files
• KT-11543 Do not produce unnecessary casts of non-nullable expression to nullable type
• KT-11160 Fix IDE freeze

Android

• KT-7729 Add Android Lint checks for Kotlin (from Android Studio 1.5)
• KT-11487 Fixed sequential build with kapt and stubs enabled when Kotlin source file was modified and no Java source files were modified
• KT-11264 Action to create new activity in Kotlin
• KT-11201 Do not ignore items with similar names in kapt
• KT-11944 Rename Android Extensions imports when the layout file is renamed/deleted/added
• KT-10321 Do not upcast ViewStub to View
• KT-10841 Support @android:id/* IDs in Android Extensions

Maven

• KT-2917, KT-11261 Maven archetype for new Kotlin projects

Gradle

• KT-8487 Experimental support for incremental compilation with project property kotlin.incremental
• KT-11350 Fixed a bug causing Java rebuild when both Java and Kotlin are up-to-date
• KT-10507 Fix IllegalArgumentException "Missing extension point" on parallel builds
• KT-10932 Prevent compile tasks from running when nothing changes
• KT-11993 Fix NoSuchMethodError on access to internal members in production from tests (IDEA 2016+)

Issues fixed in update:

• https://youtrack.jetbrains.com/issue/KT-11584
• https://youtrack.jetbrains.com/issue/KT-11514
• https://youtrack.jetbrains.com/issue/KT-11590

Issues fixed in update: https://youtrack.jetbrains.com/issue/KT-11468, https://youtrack.jetbrains.com/issue/KT-11478

Compiler

Analysis & diagnostics issues fixed:

• KT-2277 Local function declarations are now checked for overload conflicts
• KT-3602 Special diagnostic is reported now on nullable ‘for’ range
• KT-10775 No compilation exception for empty when
• KT-10952 False deprecation warnings removed
• KT-10934 Type inference improved for whens
• KT-10902 Redeclaration is reported for top-level property vs classifier conflict
• KT-9985 Correct handling of safe call arguments in generic functions
• KT-10856 Diagnostic about projected out member is reported correctly on calls with smart cast receiver
• KT-5190 Calls of Java 8 Stream.collect
• KT-11109 Warning is reported on Strictfp annotation on a class because it's not supported yet
• KT-10686 Support generic constructors defined in Java
• KT-6958 Fixed resolution for overloaded functions with extension lambdas
• KT-10765 Correct handling of overload conflict between constructor and function in JPS
• KT-10752 If inferred type for an expression refers to a non-accessible Java class, it's a compiler error to prevent IAE in runtime
• KT-10913, KT-10186, KT-5198 False “unreachable code” fixed for various situations
• Minor: KT-3680, KT-9702, KT-8776, KT-6745, KT-10919, KT-9548

JVM code generation issues fixed:

• KT-11153 NoClassDefFoundError is fixed on primitive iterators during boxing optimization
• KT-7319 Correct parameter names for @JvmOverloads-generated methods
• KT-10425 Non-const values of member properties are not inlined now
• KT-11163 Correct calls of custom compareTo on primitives
• KT-11081 Reified type parameters are correctly stored in anonymous objects
• KT-11121 Generic properties generation is fixed for interfaces
• KT-11285, KT-10958 Special bridge generation refined
• KT-10313, KT-11190, KT-11192, KT-11130 Diagnostics and bytecode fixed for various operations with Long
• KT-11203, KT-11191, KT-11206, KT-8505, KT-11203 Handling of increment / decrement for collection elements with user-defined get / set fixed
• KT-9739 Backticked names with spaces are generated correctly

JS translator issues fixed:

• KT-7683, KT-11027 correct handling of in / !in inside when expressions

Standard library

• KT-10579 Improved performance of sum() and average() for arrays
• KT-10821 Improved performance of drop() / take() for sequences

IDE

New features:

• Compatibility with IDEA 2016
• Kotlin Education Plugin (for IDEA 2016)
• KT-9752 More usable file chooser for "Move declaration to another file"
• KT-9697 Move method to companion object and back

General issues fixed:

• KT-11277 Correct moving of Java classes from project view
• KT-11256 Navigate Declaration fixed for Java classes with @NotNull parameter in constructor
• KT-10553 A warning provided when Refactor / Move result is not compilable due to visibility problems
• KT-11039 Parameter names are now not missing in parameter info and completion for compiled java code used from kotlin
• KT-10204 Highlight usages in file is working now for function parameter
• KT-10954 Introduce Parameter (Ctrl+Alt+P) fixed when default value is a simple name reference
• KT-10776 Intentions: "Convert to lambda expression" works now for empty function body
• KT-10815 Generate equals() and hashCode() is no more suggested for interfaces
• KT-10818 "Initialize with constructor parameter" fixed
• KT-8876 "Convert member to extension" now removes modality modifiers (open / final)
• KT-10800 Create enum entry now adds comma after a new entry
• KT-10552 Pull Members Up now takes visibility conflicts into account
• KT-10978 Partially fixed, completion for JOOQ became ~ 10 times faster
• KT-10940 Reference search optimized for convention functions
• KT-9026 Editor no more locks up during scala file viewing
• KT-11142, KT-11276 Darkula scheme appearance corrected for Kotlin
• Minor: KT-10778, KT-10763, KT-10908, KT-10345, KT-10696, KT-11041, KT-9434

Configuration issues fixed:

• KT-11213 Kotlin plugin version corrected in build.gradle
• KT-10918 "Update Kotlin runtime" action does not try to update the runtime coming in from Gradle
• KT-11072 Libraries in maven, gradle and ide systems are never more detected as runtime libraries
• KT-10489 Configuration messages are aggregated into one notification
• KT-10831 Configure Kotlin in Project: "All modules containing Kotlin files" does not list modules not containing Kotlin files
• KT-10366 Gradle import: no fake "Configure Kotlin" notification on project creating

Debugger issues fixed:

• KT-10827 Fixed debugger stepping for inline calls
• KT-10780 Breakpoints in a lazy property work correctly
• KT-10634 Watches can now use private overloaded functions
• KT-10611 Line breakpoints now can be created inside lambda in init block
• KT-10673 Breakpoints inside lambda are no more ignored in presence of crossinline function parameter
• KT-11318 Stepping inside for each is optimized
• KT-3873 Editing code while standing on breakpoint is optimized
• KT-7261, KT-7266, KT-10672 Evaluate expression applicability corrected

Tools

• KT-7943, KT-10127 Overhead removed in Kotlin Gradle Plugin
• KT-11351 Fixed NoSuchMethodError with Gradle 2.12