Compiler

New Features

• KT-22703 Allow expect/actual annotation constructors to have default values
• KT-19159 Support crossinline lambda parameters of suspend function type
• KT-21913 Support default arguments for expected declarations
• KT-19120 Provide extra compiler arguments in ScriptTemplateDefinition
• KT-19415 Introduce @JvmDefault annotation
• KT-21515 Restrict visibility of classifiers inside companion objects

Performance Improvements

• KT-10057 Use lcmp instruction instead of kotlin/jvm/internal/Intrinsics.compare
• KT-14258 Suboptimal codegen for private fieldaccess to private field in companion object
• KT-18731 == between enums should use reference equality, not Intrinsics.areEqual().
• KT-22714 Unnecessary checkcast to array of object from an array of specific type
• KT-5177 Optimize code generation for for loop with withIndex()
• KT-19477 Allow to implement several common modules with a single platform module
• KT-21347 Add compiler warning about using kotlin-stdlib-jre7 or kotlin-stdlib-jre8 artifacts

Fixes

• KT-16424 Broken bytecode for nullable generic methods
• KT-17171 ClassCastException in case of SAM conversion with out variance
• KT-19399 Incorrect bytecode generated for inline functions in some complex cases
• KT-21696 Incorrect warning for use-site target on extension function
• KT-22031 Non-abstract expect classes should not have abstract members
• KT-22260 Never flag inline suspend fun with NOTHING_TO_INLINE
• KT-22352 Expect/actual checker can't handle properties and functions with the same name
• KT-22652 Interface with default overrides is not perceived as a SAM
• KT-22904 Incorrect bytecode generated for withIndex iteration on Array<Int>
• KT-22906 Invalid class name generated for lambda created from method reference in anonymous object
• KT-23044 Overriden public property with internal setter cannot be found in runtime
• KT-23104 Incorrect code generated for LHS of an intrinsified in operator in case of generic type substituted with Character
• KT-23309 Minor spelling errors in JVM internal error messages
• KT-22001 JS: compiler crashes on += with "complex" receiver
• KT-23239 JS: Default arguments for non-final member function support is missing for MPP
• KT-17091 Converting to SAM Java type appends non-deterministic hash to class name
• KT-21521 Compilation exception when trying to compile a suspend function with tailrec keyword
• KT-21605 Cross-inlined coroutine with captured outer receiver creates unverifiable code
• KT-21864 Expect-actual matcher doesn't consider generic upper bounds
• KT-21906 ACTUAL_MISSING is reported for actual constructor of non-actual class
• KT-21939 Improve ACTUAL_MISSING diagnostics message
• KT-22513 Flaky "JarURLConnection.getUseCaches" NPE during compilation when using compiler plugins

Libraries

• KT-11208 readLine() shouldn't use buffered reader

IDE

New Features

• KT-10368 Run Action for Kotlin Scratch Files
• KT-16892 Shortcut to navigate between header and impl
• KT-23005 Support prefix/suffix attributes for language injection in Kotlin with annotations and comments

Performance Improvements

• KT-19484 KotlinBinaryClassCache retains a lot of memory
• KT-23183 ConfigureKotlinNotification.getNotificationString() scans modules with Kotlin files twice
• KT-23380 Improve IDE performance when working with Spring projects

Fixes

• KT-15482 KotlinNullPointerException in IDE from expected class with nested class
• KT-15739 Internal visibility across common and platform-dependent modules
• KT-19025 Not imported build.gradle.kts is all red
• KT-19165 IntelliJ should suggest to reload Gradle projects when build.gradle.kts changes
• KT-20282 'Move statement up' works incorrectly for statement after finally block if try block contains closure
• KT-20521 Kotlin Gradle script: valid build.gradle.kts is red and becomes normal only after reopening the project
• KT-20592 KotlinNullPointerException: nested class inside expect / actual interface
• KT-21013 "Move statement up/down" fails for multiline declarations
• KT-21420 .gradle.kts editor should do no semantic highlighting until the first successful dependency resolver response
• KT-21683 Language injection: JPAQL. Injection should be present for "query" parameter of @NamedNativeQueries
• KT-21745 Warning and quickfix about kotlin-stdlib-jre7/8 -> kotlin-stdlib-jdk7/8 in Maven
• KT-21746 Warning and quickfix about kotlin-stdlib-jre7/8 -> kotlin-stdlib-jdk7/8 in Gradle
• KT-21753 Language injection: SpEL. Not injected for key in @Caching
• KT-21771 All annotations in Annotations.kt from kotlin-test-js module wrongly have ACTUAL_MISSING
• KT-21831 Opening class from kotlin-stdlib-jdk8.jar fails with EE: "Stub list in ... length differs from PSI"
• KT-22229 Kotlin local delegated property Import auto-removed with "Java: Optimize imports on the fly"
• KT-22724 ISE: "psiFile must not be null" at KotlinNodeJsRunConfigurationProducer.setupConfigurationFromContext()
• KT-22817 Hitting 'Propagate Parameters' in Change Signature throws UnsupportedOperationException
• KT-22851 Apply button is always active on Kotlin compiler settings tab
• KT-22858 Multiplatform: String constructor parameter is reported in Java file of jvm module on creation of a new instance of a class from common module
• KT-22865 Support multiple expectedBy dependencies when importing project from Gradle or Maven
• KT-22873 Common module-based light classes do not see JDK
• KT-22874 Exception on surround with "if else" when resulting if should be wrapped with ()
• KT-22925 Unable to view Type Hierarchy from constructor call in expression
• KT-22926 Confusing behavior of Type Hierarchy depending on the caret position at superclass constructor
• KT-23097 Enhance multiplatform project wizard
• KT-23271 Warn about using kotlin-stdlib-jre* libs in dependencyManagement section in Maven with eap and dev Kotlin versions
• KT-20672 IDE can't resolve references to elements from files with @JvmPackageName
• KT-23546 Variable name auto-completion popup gets in the way
• KT-23546 Do not show duplicated names in variables completion list
• KT-19120 Use script compiler options on script dependencies in the IDE as well

IDE. Gradle. Script

• KT-23228 Do not highlight .gradle.kts files in non-Gradle projects

IDE. Inspections and Intentions

New Features

• KT-16382 Intention to convert expr.unsafeCast<Type>() to expr as Type and vice versa
• KT-20439 Intentions to add/remove labeled return to last expression in a lambda
• KT-22011 Inspection to report the usage of Java Collections methods on immutable Kotlin Collections
• KT-22933 Intention/inspection to convert Pair constructor to to function
• KT-19871 Intentions for specifying use-site targets for an annotation
• KT-22971 Inspection to highlight and remove unnecessary explicit companion object references

Fixes

• KT-12226 "Convert concatenation to template" does not process $ sign as a Char
• KT-15858 "Replace with a foreach function call" intention breaks code
• KT-16332 Add braces to 'if' statement intention does not put end-of-line comment properly into braces
• KT-17058 "Create implementations from headers": each implementation gets own file
• KT-17306 Don't report package name mismatch if there's no Java code in the module
• KT-19730 Quickfix for delegated properties boilerplate generation doesn't work on locals
• KT-21005 "Missing KDoc inspection" is broken
• KT-21082 "Create actual declaration" of top-level subclass of expected sealed class in the same file as actual declaration of sealed class present
• KT-22110 "Can be joined with assignment" inspection underlining extends into comment
• KT-22329 "Create class" quickfix is not suggested in when branch
• KT-22428 Create member function from usage shouldn't present type parameters as options
• KT-22492 "Specify explicit lambda signature" intention is available only on lambda braces
• KT-22719 Incorrect warning 'Redundant semicolon' when having method call before lambda expression
• KT-22861 "Add annotation target" quickfix is not available on annotation with use site target
• KT-22862 "Add annotation target" quickfix does not process existent annotations with use site target
• KT-22917 Update order of containers for create class quickfix
• KT-22949 NPE on conversion of run/apply with explicit lambda signature to let/also
• KT-22950 Convert stdlib extension function to scoping function works incorrectly in case of explicit lambda signature
• KT-22954 "Sort modifiers" quickfix works incorrectly when method is annotated
• KT-22970 Add explicit this intention/inspection missing for lambda invocation
• KT-23109 "Remove redundant 'if' statement" inspection breaks code with labeled return
• KT-23215 "Add function to supertype" quickfix works incorrectly
• KT-14270 Intentions "Add/Remove braces" should be applied to the statement where caret is if there several nested statements one into another
• KT-21743 Method reference not correctly moved into parentheses
• KT-23045 AE “Failed to create expression from text” on concatenating string with broken quote mark char literal
• KT-23046 CCE ”KtBinaryExpression cannot be cast to KtStringTemplateExpression” on concatenating broken quote mark char literal with string
• KT-23227 "Add annotation target" quickfix is not suggested for field: use-site target

IDE. Refactorings

Fixes

• KT-13255 Refactor / Rename: renaming local variable or class to existing name gives no warning
• KT-13284 Refactor / Rename: superfluous imports and FQNs in Java using @JvmOverloads functions
• KT-13907 Rename refactoring warns about name conflict if there is function with different signature but the same name
• KT-13986 Full qualified names of classes in comments should be changed after class Move, if comment contains backquotes
• KT-14671 typealias: refactor/rename should propose to rename occurrences in comments
• KT-15039 Extra usage is found for a parameter in data class in destructuring construction
• KT-15228 Extract function from inline function should create public function
• KT-15302 Reference to typealias in SAM conversion is not found
• KT-16510 Can't rename quoted identifier is
• KT-17827 Refactor / Move corrupts bound references when containing class of member element is changed
• KT-19561 Name conflict warning when renaming method to a name matching an extension method with the same name exists
• KT-20178 Refactor → Rename can't make companion object name empty
• KT-22282 Moving a Kotlin file to another package does not change imports in itself
• KT-22482 Rename refactoring insert qualifier for non related property call
• KT-22661 Refactor/Move: top level field reference is not imported automatically after move to the source root
• KT-22678 Refactor / Copy: "Class uses constructor which will be inaccessible after move" when derived class has a protected constructor
• KT-22692 Refactor/Move: unnecessary curly braces added on moving to a separate file a top level function with a top level field usage
• KT-22745 Refactor/Move inserts FQ function name at the call site if there is a field same named as the function
• KT-22747 Moving top-level function to a different (existing) file doesn't update references from Java
• KT-22751 Refactor/Rename: type alias name clash is not reported
• KT-22769 Refactor/Move: there is no warning on moving sealed class or its inheritors to another file
• KT-22771 Refactor/Move: there is no warning on moving nested class to another class with stricter visibility
• KT-22812 Refactor/Rename extension functions incorrectly conflicts with other extension functions
• KT-23065 Refactor/Move: Specify the warning message on moving sealed class inheritors without moving the sealed class itself

IDE. Script

• KT-22647 Run script Action in IDE should use Kotlin compiler from the IDE plugin
• KT-18930 IDEA is unstable With Gradle Kotlin DSL
• KT-21042 Gradle Script Kotlin project is full-red
• KT-11618 Running .kts file from IntelliJ IDEA doesn't allow to import classes in other files which are also part of the project

IDE. Debugger

• KT-22205 Breakpoints won't work for Kotlin testing with JUnit

JavaScript

• KT-22019 Fix wrong list sorting order

Tools. CLI

• KT-22777 Unstable language version setting has no effect when attached runtime has lower version

Tools. Gradle

• KT-22824 expectedBy dependency should be expressed as compile dependency in POM
• KT-15371 Multiplatform: setting free compiler args can break build
• KT-22864 Allow multiple expectedBy configuration dependencies in Gradle
• KT-22895 'kotlin-runtime' library is missing in the compiler classpath sometimes
• KT-23085 Use proper names for the Gradle task inputs/outputs added at runtime
• KT-23694 Fix parallel build in Kotlin IC – invalid KotlinCoreEnvironment disposal

Tools. Android

• Android Extensions: Support fragments from kotlinx package;

Tools. Incremental Compile

• KT-20516 "Unresolved reference" when project declares same class as its dependency
• KT-22542 "Source file or directory not found" for incremental compilation with Kobalt
• KT-23165 Incremental compilation is sometimes broken after moving one class

Tools. JPS

• KT-16091 Incremental compilation ignores changes in Java static field
• KT-22995 EA-91869 - NA: LookupStorage.<init>

Tools. kapt

• KT-21735 Kapt cache was not cleared sometimes

Tools. REPL

• KT-21611 REPL: Empty lines should be ignored

Compiler

New Features

• KT-22703 Allow expect/actual annotation constructors to have default values
• KT-19159 Support crossinline lambda parameters of suspend function type
• KT-21913 Support default arguments for expected declarations
• KT-19120 Provide extra compiler arguments in ScriptTemplateDefinition
• KT-19415 Introduce @JvmDefault annotation
• KT-21515 Restrict visibility of classifiers inside companion objects

Performance Improvements

• KT-10057 Use lcmp instruction instead of kotlin/jvm/internal/Intrinsics.compare
• KT-14258 Suboptimal codegen for private fieldaccess to private field in companion object
• KT-18731 == between enums should use reference equality, not Intrinsics.areEqual().
• KT-22714 Unnecessary checkcast to array of object from an array of specific type
• KT-5177 Optimize code generation for for loop with withIndex()
• KT-19477 Allow to implement several common modules with a single platform module
• KT-21347 Add compiler warning about using kotlin-stdlib-jre7 or kotlin-stdlib-jre8 artifacts

Fixes

• KT-16424 Broken bytecode for nullable generic methods
• KT-17171 ClassCaseException in case of SAM conversion with out variance
• KT-19399 Incorrect bytecode generated for inline functions in some complex cases
• KT-21696 Incorrect warning for use-site target on extension function
• KT-22031 Non-abstract expect classes should not have abstract members
• KT-22260 Never flag inline suspend fun with NOTHING_TO_INLINE
• KT-22352 Expect/actual checker can't handle properties and functions with the same name
• KT-22652 Interface with default overrides is not perceived as a SAM
• KT-22904 Incorrect bytecode generated for withIndex iteration on Array<Int>
• KT-22906 Invalid class name generated for lambda created from method reference in anonymous object
• KT-23044 Overriden public property with internal setter cannot be found in runtime
• KT-23104 Incorrect code generated for LHS of an intrinsified in operator in case of generic type substituted with Character
• KT-23309 Minor spelling errors in JVM internal error messages
• KT-22001 JS: compiler crashes on += with "complex" receiver
• KT-23239 JS: Default arguments for non-final member function support is missing for MPP
• KT-17091 Converting to SAM Java type appends non-deterministic hash to class name
• KT-21521 Compilation exception when trying to compile a suspend function with tailrec keyword
• KT-21605 Cross-inlined coroutine with captured outer receiver creates unverifiable code
• KT-21864 Expect-actual matcher doesn't consider generic upper bounds
• KT-21906 ACTUAL_MISSING is reported for actual constructor of non-actual class
• KT-21939 Improve ACTUAL_MISSING diagnostics message
• KT-22513 Flaky "JarURLConnection.getUseCaches" NPE during compilation when using compiler plugins

Libraries

• KT-11208 readLine() shouldn't use buffered reader

IDE

New Features

• KT-10368 Run Action for Kotlin Scratch Files
• KT-16892 Shortcut to navigate between header and impl
• KT-23005 Support prefix/suffix attributes for language injection in Kotlin with annotations and comments

Performance Improvements

• KT-19484 KotlinBinaryClassCache retains a lot of memory
• KT-23183 ConfigureKotlinNotification.getNotificationString() scans modules with Kotlin files twice
• KT-23380 Improve IDE performance when working with Spring projects

Fixes

• KT-15482 KotlinNullPointerException in IDE from expected class with nested class
• KT-15739 Internal visibility across common and platform-dependent modules
• KT-19025 Not imported build.gradle.kts is all red
• KT-19165 IntelliJ should suggest to reload Gradle projects when build.gradle.kts changes
• KT-20282 'Move statement up' works incorrectly for statement after finally block if try block contains closure
• KT-20521 Kotlin Gradle script: valid build.gradle.kts is red and becomes normal only after reopening the project
• KT-20592 KotlinNullPointerException: nested class inside expect / actual interface
• KT-21013 "Move statement up/down" fails for multiline declarations
• KT-21420 .gradle.kts editor should do no semantic highlighting until the first successful dependency resolver response
• KT-21683 Language injection: JPAQL. Injection should be present for "query" parameter of @NamedNativeQueries
• KT-21745 Warning and quickfix about kotlin-stdlib-jre7/8 -> kotlin-stdlib-jdk7/8 in Maven
• KT-21746 Warning and quickfix about kotlin-stdlib-jre7/8 -> kotlin-stdlib-jdk7/8 in Gradle
• KT-21753 Language injection: SpEL. Not injected for key in @Caching
• KT-21771 All annotations in Annotations.kt from kotlin-test-js module wrongly have ACTUAL_MISSING
• KT-21831 Opening class from kotlin-stdlib-jdk8.jar fails with EE: "Stub list in ... length differs from PSI"
• KT-22229 Kotlin local delegated property Import auto-removed with "Java: Optimize imports on the fly"
• KT-22724 ISE: "psiFile must not be null" at KotlinNodeJsRunConfigurationProducer.setupConfigurationFromContext()
• KT-22817 Hitting 'Propagate Parameters' in Change Signature throws UnsupportedOperationException
• KT-22851 Apply button is always active on Kotlin compiler settings tab
• KT-22858 Multiplatform: String constructor parameter is reported in Java file of jvm module on creation of a new instance of a class from common module
• KT-22865 Support multiple expectedBy dependencies when importing project from Gradle or Maven
• KT-22873 Common module-based light classes do not see JDK
• KT-22874 Exception on surround with "if else" when resulting if should be wrapped with ()
• KT-22925 Unable to view Type Hierarchy from constructor call in expression
• KT-22926 Confusing behavior of Type Hierarchy depending on the caret position at superclass constructor
• KT-23097 Enhance multiplatform project wizard
• KT-23271 Warn about using kotlin-stdlib-jre* libs in dependencyManagement section in Maven with eap and dev Kotlin versions
• KT-20672 IDE can't resolve references to elements from files with @JvmPackageName
• KT-23546 Variable name auto-completion popup gets in the way

IDE. Gradle. Script

• KT-23228 Do not highlight .gradle.kts files in non-Gradle projects

IDE. Inspections and Intentions

New Features

• KT-16382 Intention to convert expr.unsafeCast<Type>() to expr as Type and vice versa
• KT-20439 Intentions to add/remove labeled return to last expression in a lambda
• KT-22011 Inspection to report the usage of Java Collections methods on immutable Kotlin Collections
• KT-22933 Intention/inspection to convert Pair constructor to to function
• KT-19871 Intentions for specifying use-site targets for an annotation
• KT-22971 Inspection to highlight and remove unnecessary explicit companion object references

Fixes

• KT-12226 "Convert concatenation to template" does not process $ sign as a Char
• KT-15858 "Replace with a foreach function call" intention breaks code
• KT-16332 Add braces to 'if' statement intention does not put end-of-line comment properly into braces
• KT-17058 "Create implementations from headers": each implementation gets own file
• KT-17306 Don't report package name mismatch if there's no Java code in the module
• KT-19730 Quickfix for delegated properties boilerplate generation doesn't work on locals
• KT-21005 "Missing KDoc inspection" is broken
• KT-21082 "Create actual declaration" of top-level subclass of expected sealed class in the same file as actual declaration of sealed class present
• KT-22110 "Can be joined with assignment" inspection underlining extends into comment
• KT-22329 "Create class" quickfix is not suggested in when branch
• KT-22428 Create member function from usage shouldn't present type parameters as options
• KT-22492 "Specify explicit lambda signature" intention is available only on lambda braces
• KT-22719 Incorrect warning 'Redundant semicolon' when having method call before lambda expression
• KT-22861 "Add annotation target" quickfix is not available on annotation with use site target
• KT-22862 "Add annotation target" quickfix does not process existent annotations with use site target
• KT-22917 Update order of containers for create class quickfix
• KT-22949 NPE on conversion of run/apply with explicit lambda signature to let/also
• KT-22950 Convert stdlib extension function to scoping function works incorrectly in case of explicit lambda signature
• KT-22954 "Sort modifiers" quickfix works incorrectly when method is annotated
• KT-22970 Add explicit this intention/inspection missing for lambda invocation
• KT-23109 "Remove redundant 'if' statement" inspection breaks code with labeled return
• KT-23215 "Add function to supertype" quickfix works incorrectly
• KT-14270 Intentions "Add/Remove braces" should be applied to the statement where caret is if there several nested statements one into another
• KT-21743 Method reference not correctly moved into parentheses
• KT-23045 AE “Failed to create expression from text” on concatenating string with broken quote mark char literal
• KT-23046 CCE ”KtBinaryExpression cannot be cast to KtStringTemplateExpression” on concatenating broken quote mark char literal with string
• KT-23227 "Add annotation target" quickfix is not suggested for field: use-site target

IDE. Refactorings

Fixes

• KT-13255 Refactor / Rename: renaming local variable or class to existing name gives no warning
• KT-13284 Refactor / Rename: superfluous imports and FQNs in Java using @JvmOverloads functions
• KT-13907 Rename refactoring warns about name conflict if there is function with different signature but the same name
• KT-13986 Full qualified names of classes in comments should be changed after class Move, if comment contains backquotes
• KT-14671 typealias: refactor/rename should propose to rename occurrences in comments
• KT-15039 Extra usage is found for a parameter in data class in destructuring construction
• KT-15228 Extract function from inline function should create public function
• KT-15302 Reference to typealias in SAM conversion is not found
• KT-16510 Can't rename quoted identifier is
• KT-17827 Refactor / Move corrupts bound references when containing class of member element is changed
• KT-19561 Name conflict warning when renaming method to a name matching an extension method with the same name exists
• KT-20178 Refactor → Rename can't make companion object name empty
• KT-22282 Moving a Kotlin file to another package does not change imports in itself
• KT-22482 Rename refactoring insert qualifier for non related property call
• KT-22661 Refactor/Move: top level field reference is not imported automatically after move to the source root
• KT-22678 Refactor / Copy: "Class uses constructor which will be inaccessible after move" when derived class has a protected constructor
• KT-22692 Refactor/Move: unnecessary curly braces added on moving to a separate file a top level function with a top level field usage
• KT-22745 Refactor/Move inserts FQ function name at the call site if there is a field same named as the function
• KT-22747 Moving top-level function to a different (existing) file doesn't update references from Java
• KT-22751 Refactor/Rename: type alias name clash is not reported
• KT-22769 Refactor/Move: there is no warning on moving sealed class or its inheritors to another file
• KT-22771 Refactor/Move: there is no warning on moving nested class to another class with stricter visibility
• KT-22812 Refactor/Rename extension functions incorrectly conflicts with other extension functions
• KT-23065 Refactor/Move: Specify the warning message on moving sealed class inheritors without moving the sealed class itself

IDE. Script

• KT-22647 Run script Action in IDE should use Kotlin compiler from the IDE plugin
• KT-18930 IDEA is unstable With Gradle Kotlin DSL
• KT-21042 Gradle Script Kotlin project is full-red
• KT-11618 Running .kts file from IntelliJ IDEA doesn't allow to import classes in other files which are also part of the project

IDE. Debugger

• KT-22205 Breakpoints won't work for Kotlin testing with JUnit

JavaScript

• KT-22019 Fix wrong list sorting order

Tools. CLI

• KT-22777 Unstable language version setting has no effect when attached runtime has lower version

Tools. Gradle

• KT-22824 expectedBy dependency should be expressed as compile dependency in POM
• KT-15371 Multiplatform: setting free compiler args can break build
• KT-22864 Allow multiple expectedBy configuration dependencies in Gradle
• KT-22895 'kotlin-runtime' library is missing in the compiler classpath sometimes
• KT-23085 Use proper names for the Gradle task inputs/outputs added at runtime

Tools. Incremental Compile

• KT-20516 "Unresolved reference" when project declares same class as its dependency
• KT-22542 "Source file or directory not found" for incremental compilation with Kobalt
• KT-23165 Incremental compilation is sometimes broken after moving one class

Tools. JPS

• KT-16091 Incremental compilation ignores changes in Java static field
• KT-22995 EA-91869 - NA: LookupStorage.<init>

Tools. kapt

• KT-21735 Kapt cache was not cleared sometimes

Tools. REPL

• KT-21611 REPL: Empty lines should be ignored

Compiler

New Features

• KT-22703 Allow expect/actual annotation constructors to have default values
• KT-19159 Support crossinline lambda parameters of suspend function type
• KT-21913 Support default arguments for expected declarations
• KT-19120 Provide extra compiler arguments in ScriptTemplateDefinition
• KT-19415 Introduce @JvmDefault annotation
• KT-21515 Restrict visibility of classifiers inside companion objects

Performance Improvements

• KT-10057 Use lcmp instruction instead of kotlin/jvm/internal/Intrinsics.compare
• KT-14258 Suboptimal codegen for private fieldaccess to private field in companion object
• KT-18731 == between enums should use reference equality, not Intrinsics.areEqual().
• KT-22714 Unnecessary checkcast to array of object from an array of specific type
• KT-5177 Optimize code generation for for loop with withIndex()
• KT-19477 Allow to implement several common modules with a single platform module
• KT-21347 Add compiler warning about using kotlin-stdlib-jre7 or kotlin-stdlib-jre8 artifacts

Fixes

• KT-16424 Broken bytecode for nullable generic methods
• KT-17171 ClassCaseException in case of SAM conversion with out variance
• KT-19399 Incorrect bytecode generated for inline functions in some complex cases
• KT-21696 Incorrect warning for use-site target on extension function
• KT-22031 Non-abstract expect classes should not have abstract members
• KT-22260 Never flag inline suspend fun with NOTHING_TO_INLINE
• KT-22352 Expect/actual checker can't handle properties and functions with the same name
• KT-22652 Interface with default overrides is not perceived as a SAM
• KT-22904 Incorrect bytecode generated for withIndex iteration on Array<Int>
• KT-22906 Invalid class name generated for lambda created from method reference in anonymous object
• KT-23044 Overriden public property with internal setter cannot be found in runtime
• KT-23104 Incorrect code generated for LHS of an intrinsified in operator in case of generic type substituted with Character
• KT-23309 Minor spelling errors in JVM internal error messages
• KT-22001 JS: compiler crashes on += with "complex" receiver
• KT-23239 JS: Default arguments for non-final member function support is missing for MPP
• KT-17091 Converting to SAM Java type appends non-deterministic hash to class name
• KT-21521 Compilation exception when trying to compile a suspend function with tailrec keyword
• KT-21605 Cross-inlined coroutine with captured outer receiver creates unverifiable code
• KT-21864 Expect-actual matcher doesn't consider generic upper bounds
• KT-21906 ACTUAL_MISSING is reported for actual constructor of non-actual class
• KT-21939 Improve ACTUAL_MISSING diagnostics message

Libraries

• KT-11208 readLine() shouldn't use buffered reader

IDE

New Features

• KT-10368 Run Action for Kotlin Scratch Files
• KT-16892 Shortcut to navigate between header and impl
• KT-23005 Support prefix/suffix attributes for language injection in Kotlin with annotations and comments

Performance Improvements

• KT-19484 KotlinBinaryClassCache retains a lot of memory
• KT-23183 ConfigureKotlinNotification.getNotificationString() scans modules with Kotlin files twice
• KT-23380 Improve IDE performance when working with Spring projects

Fixes

• KT-15482 KotlinNullPointerException in IDE from expected class with nested class
• KT-15739 Internal visibility across common and platform-dependent modules
• KT-19025 Not imported build.gradle.kts is all red
• KT-19165 IntelliJ should suggest to reload Gradle projects when build.gradle.kts changes
• KT-20282 'Move statement up' works incorrectly for statement after finally block if try block contains closure
• KT-20521 Kotlin Gradle script: valid build.gradle.kts is red and becomes normal only after reopening the project
• KT-20592 KotlinNullPointerException: nested class inside expect / actual interface
• KT-21013 "Move statement up/down" fails for multiline declarations
• KT-21420 .gradle.kts editor should do no semantic highlighting until the first successful dependency resolver response
• KT-21683 Language injection: JPAQL. Injection should be present for "query" parameter of @NamedNativeQueries
• KT-21745 Warning and quickfix about kotlin-stdlib-jre7/8 -> kotlin-stdlib-jdk7/8 in Maven
• KT-21746 Warning and quickfix about kotlin-stdlib-jre7/8 -> kotlin-stdlib-jdk7/8 in Gradle
• KT-21753 Language injection: SpEL. Not injected for key in @Caching
• KT-21771 All annotations in Annotations.kt from kotlin-test-js module wrongly have ACTUAL_MISSING
• KT-21831 Opening class from kotlin-stdlib-jdk8.jar fails with EE: "Stub list in ... length differs from PSI"
• KT-22229 Kotlin local delegated property Import auto-removed with "Java: Optimize imports on the fly"
• KT-22724 ISE: "psiFile must not be null" at KotlinNodeJsRunConfigurationProducer.setupConfigurationFromContext()
• KT-22817 Hitting 'Propagate Parameters' in Change Signature throws UnsupportedOperationException
• KT-22851 Apply button is always active on Kotlin compiler settings tab
• KT-22858 Multiplatform: String constructor parameter is reported in Java file of jvm module on creation of a new instance of a class from common module
• KT-22865 Support multiple expectedBy dependencies when importing project from Gradle or Maven
• KT-22873 Common module-based light classes do not see JDK
• KT-22874 Exception on surround with "if else" when resulting if should be wrapped with ()
• KT-22925 Unable to view Type Hierarchy from constructor call in expression
• KT-22926 Confusing behavior of Type Hierarchy depending on the caret position at superclass constructor
• KT-23097 Enhance multiplatform project wizard
• KT-23271 Warn about using kotlin-stdlib-jre* libs in dependencyManagement section in Maven with eap and dev Kotlin versions
• KT-20672 IDE can't resolve references to elements from files with @JvmPackageName

IDE. Gradle. Script

• KT-23228 Do not highlight .gradle.kts files in non-Gradle projects

IDE. Inspections and Intentions

New Features

• KT-16382 Intention to convert expr.unsafeCast<Type>() to expr as Type and vice versa
• KT-20439 Intentions to add/remove labeled return to last expression in a lambda
• KT-22011 Inspection to report the usage of Java Collections methods on immutable Kotlin Collections
• KT-22933 Intention/inspection to convert Pair constructor to to function
• KT-19871 Intentions for specifying use-site targets for an annotation
• KT-22971 Inspection to highlight and remove unnecessary explicit companion object references

Fixes

• KT-12226 "Convert concatenation to template" does not process $ sign as a Char
• KT-15858 "Replace with a foreach function call" intention breaks code
• KT-16332 Add braces to 'if' statement intention does not put end-of-line comment properly into braces
• KT-17058 "Create implementations from headers": each implementation gets own file
• KT-17306 Don't report package name mismatch if there's no Java code in the module
• KT-19730 Quickfix for delegated properties boilerplate generation doesn't work on locals
• KT-21005 "Missing KDoc inspection" is broken
• KT-21082 "Create actual declaration" of top-level subclass of expected sealed class in the same file as actual declaration of sealed class present
• KT-22110 "Can be joined with assignment" inspection underlining extends into comment
• KT-22329 "Create class" quickfix is not suggested in when branch
• KT-22428 Create member function from usage shouldn't present type parameters as options
• KT-22492 "Specify explicit lambda signature" intention is available only on lambda braces
• KT-22719 Incorrect warning 'Redundant semicolon' when having method call before lambda expression
• KT-22861 "Add annotation target" quickfix is not available on annotation with use site target
• KT-22862 "Add annotation target" quickfix does not process existent annotations with use site target
• KT-22917 Update order of containers for create class quickfix
• KT-22949 NPE on conversion of run/apply with explicit lambda signature to let/also
• KT-22950 Convert stdlib extension function to scoping function works incorrectly in case of explicit lambda signature
• KT-22954 "Sort modifiers" quickfix works incorrectly when method is annotated
• KT-22970 Add explicit this intention/inspection missing for lambda invocation
• KT-23109 "Remove redundant 'if' statement" inspection breaks code with labeled return
• KT-23215 "Add function to supertype" quickfix works incorrectly
• KT-14270 Intentions "Add/Remove braces" should be applied to the statement where caret is if there several nested statements one into another
• KT-21743 Method reference not correctly moved into parentheses
• KT-23045 AE “Failed to create expression from text” on concatenating string with broken quote mark char literal
• KT-23046 CCE ”KtBinaryExpression cannot be cast to KtStringTemplateExpression” on concatenating broken quote mark char literal with string
• KT-23227 "Add annotation target" quickfix is not suggested for field: use-site target

IDE. Refactorings

Fixes

• KT-13255 Refactor / Rename: renaming local variable or class to existing name gives no warning
• KT-13284 Refactor / Rename: superfluous imports and FQNs in Java using @JvmOverloads functions
• KT-13907 Rename refactoring warns about name conflict if there is function with different signature but the same name
• KT-13986 Full qualified names of classes in comments should be changed after class Move, if comment contains backquotes
• KT-14671 typealias: refactor/rename should propose to rename occurrences in comments
• KT-15039 Extra usage is found for a parameter in data class in destructuring construction
• KT-15228 Extract function from inline function should create public function
• KT-15302 Reference to typealias in SAM conversion is not found
• KT-16510 Can't rename quoted identifier is
• KT-17827 Refactor / Move corrupts bound references when containing class of member element is changed
• KT-19561 Name conflict warning when renaming method to a name matching an extension method with the same name exists
• KT-20178 Refactor → Rename can't make companion object name empty
• KT-22282 Moving a Kotlin file to another package does not change imports in itself
• KT-22482 Rename refactoring insert qualifier for non related property call
• KT-22661 Refactor/Move: top level field reference is not imported automatically after move to the source root
• KT-22678 Refactor / Copy: "Class uses constructor which will be inaccessible after move" when derived class has a protected constructor
• KT-22692 Refactor/Move: unnecessary curly braces added on moving to a separate file a top level function with a top level field usage
• KT-22745 Refactor/Move inserts FQ function name at the call site if there is a field same named as the function
• KT-22747 Moving top-level function to a different (existing) file doesn't update references from Java
• KT-22751 Refactor/Rename: type alias name clash is not reported
• KT-22769 Refactor/Move: there is no warning on moving sealed class or its inheritors to another file
• KT-22771 Refactor/Move: there is no warning on moving nested class to another class with stricter visibility
• KT-22812 Refactor/Rename extension functions incorrectly conflicts with other extension functions
• KT-23065 Refactor/Move: Specify the warning message on moving sealed class inheritors without moving the sealed class itself

IDE. Script

• KT-22647 Run script Action in IDE should use Kotlin compiler from the IDE plugin
• KT-18930 IDEA is unstable With Gradle Kotlin DSL
• KT-21042 Gradle Script Kotlin project is full-red
• KT-11618 Running .kts file from IntelliJ IDEA doesn't allow to import classes in other files which are also part of the project

IDE. Debugger

• KT-22205 Breakpoints won't work for Kotlin testing with JUnit

JavaScript

• KT-22019 Fix wrong list sorting order

Tools. CLI

• KT-22777 Unstable language version setting has no effect when attached runtime has lower version

Tools. Gradle

• KT-22824 expectedBy dependency should be expressed as compile dependency in POM
• KT-15371 Multiplatform: setting free compiler args can break build
• KT-22864 Allow multiple expectedBy configuration dependencies in Gradle
• KT-22895 'kotlin-runtime' library is missing in the compiler classpath sometimes
• KT-23085 Use proper names for the Gradle task inputs/outputs added at runtime

Tools. Incremental Compile

• KT-20516 "Unresolved reference" when project declares same class as its dependency
• KT-22542 "Source file or directory not found" for incremental compilation with Kobalt
• KT-23165 Incremental compilation is sometimes broken after moving one class

Tools. JPS

• KT-16091 Incremental compilation ignores changes in Java static field
• KT-22995 EA-91869 - NA: LookupStorage.<init>

Tools. kapt

• KT-21735 Kapt cache was not cleared sometimes

Tools. REPL

• KT-21611 REPL: Empty lines should be ignored

Compiler

New Features

• KT-22703 Allow expect/actual annotation constructors to have default values
• KT-19159 Support crossinline lambda parameters of suspend function type
• KT-21913 Support default arguments for expected declarations
• KT-19120 Provide extra compiler arguments in ScriptTemplateDefinition

Performance Improvements

• KT-10057 Use lcmp instruction instead of kotlin/jvm/internal/Intrinsics.compare
• KT-14258 Suboptimal codegen for private fieldaccess to private field in companion object
• KT-18731 == between enums should use reference equality, not Intrinsics.areEqual().
• KT-22714 Unnecessary checkcast to array of object from an array of specific type

Fixes

• KT-16424 Fix broken bytecode for nullable generic method
• KT-17171 Fix ClassCaseException in case of SAM conversion with out variance
• KT-19399 Incorrect bytecode generated for inline functions in some complex cases
• KT-21696 Incorrect warning for use-site target on extension function
• KT-22031 Non-abstract expect classes should not have abstract members
• KT-22260 Never flag inline suspend fun with NOTHING_TO_INLINE
• KT-22352 Expect/actual checker can't handle properties and functions with the same name
• KT-22652 Interface with default overrides is not perceived as a SAM
• KT-22904 Incorrect bytecode generated for withIndex iteration on Array<Int>
• KT-22906 Invalid class name generated for lambda created from method reference in anonymous object
• KT-23044 Overriden public property with internal setter cannot be found in runtime
• KT-23104 Incorrect code generated for LHS of an intrinsified in operator in case of generic type substituted with Character
• KT-23309 Minor spelling errors in jvm internal error message

IDE

New Features

• KT-10368 Run Action for Kotlin Scratch Files
• KT-16892 Shortcut to navigate between header and impl
• KT-23005 Support prefix/suffix attributes for language injection in Kotlin with annotations and comments

Performance Improvements

• KT-19484 KotlinBinaryClassCache retains a lot of memory
• KT-23183 ConfigureKotlinNotification.getNotificationString() scans modules with Kotlin files twice
• KT-23380 Improve IDE performance when working with Spring projects

Fixes

• KT-15482 KotlinNullPointerException in IDE from expected class with nested class
• KT-15739 Internal visibility across common and platform-dependent modules
• KT-19025 Not imported build.gradle.kts is red
• KT-19165 IntelliJ should suggest to reload Gradle projects when Kotlin build scripts change
• KT-20282 'Move statement up' works incorrectly for statement after 'finally' block if 'try' block contains closure
• KT-20521 Kotlin Gradle script: valid build.gradle.kts is red and becomes normal only after reopening the project
• KT-20592 KotlinNullPointerException: nested class inside expect / actual interface
• KT-21013 "Move statement up/down" fails for multiline declarations
• KT-21420 .gradle.kts editor should do no semantic highlighting until the first successful dependency resolver response
• KT-21683 Language injection: JPAQL. Injection should be present for "query" parameter of @NamedNativeQueries
• KT-21745 Warning and quickfix about kotlin-stdlib-jre7/8 -> kotlin-stdlib-jdk7/8 in Maven
• KT-21746 Warning and quickfix about kotlin-stdlib-jre7/8 -> kotlin-stdlib-jdk7/8 in Gradle
• KT-21753 Language injection: SpEL. Not injected for key in @Caching
• KT-21771 All annotations in Annotations.kt from kotlin-test-js module wrongly have ACTUAL_MISSING
• KT-21831 Opening class from kotlin-stdlib-jdk8.jar fails with EE: "Stub list in ... length differs from PSI"
• KT-22229 Kotlin local delegated property Import auto-removed with "Java: Optimize imports on the fly"
• KT-22724 ISE: "psiFile must not be null" at KotlinNodeJsRunConfigurationProducer.setupConfigurationFromContext()
• KT-22817 Hitting 'Propagate Parameters' in Change Signature throws UnsupportedOperationException
• KT-22851 Apply button is always active on Kotlin compiler settings tab
• KT-22858 Multiplatform: String constructor parameter is reported in Java file of jvm module on creation of a new instance of a class from common module
• KT-22865 Support multiple expectedBy dependencies when importing project from gradle or maven
• KT-22873 Common module-based light classes do not see JDK
• KT-22874 Exception on surround with "if else" when resulting if should be wrapped with ()
• KT-22925 Unable to view Type Hierarchy from constructor call in expression
• KT-22926 Confusing behavior of Type Hierarchy depending on the caret position at superclass constructor
• KT-23097 Enhance multiplatform project wizard
• KT-23271 Warn about using kotlin-stdlib-jre* libs in dependencyManagement section in Maven with eap and dev Kotlin versions

IDE. Gradle. Script

• KT-23228 Do not highlight .gradle.kts files in non-Gradle projects

IDE. Inspections and Intentions

New Features

• KT-16382 Intention to convert expr.unsafeCast<Type>() to expr as Type and vice versa
• KT-20439 Add intentions to add/remove labeled return to last expression in a lambda
• KT-22011 Inspection to report the usage of Java Collections methods on immutable Kotlin Collections
• KT-22933 Add intention/inspection to convert Pair constructor to to function

Fixes

• KT-12226 "Convert concatenation to template" does not process dollar sign as a Char
• KT-15858 "Replace with a 'foreach' function call" intention breaks code
• KT-16332 Add braces to 'if' statement intention does not put end-of-line comment properly into braces
• KT-17058 Create implementations from headers: each implementation gets own file
• KT-17306 Don't report package name mismatch if there's no Java code in the module
• KT-19730 Quickfix for delegated properties boilerplate generation doesn't work on locals
• KT-21005 Missing KDoc inspection seems to have broken in 1.1.60 EAP
• KT-21082 Create actual declaration of top-level subclass of expected sealed class in the same file as actual declaration of sealed class present
• KT-22110 "Can be joined with assignment" inspection underlining extends into comment
• KT-22329 "Create class" quickfix is not suggested in when branch
• KT-22428 Create member function from usage shouldn't present type parameters as options
• KT-22492 "Specify explicit lambda signature" intention is available only on lambda braces
• KT-22719 Incorrect warning 'Redundant semicolon' when having method call before lambda expression
• KT-22861 "Add annotation target" quick fix is not available on annotation with use site target
• KT-22862 "Add annotation target" quick fix does not process existent annotations with use site target
• KT-22917 Update order of containers for create class quickfix
• KT-22949 NPE on conversion of run/apply with explicit lambda signature to let/also
• KT-22950 Convert stdlib extension function to scoping function works incorrectly in case of explicit lambda signature
• KT-22954 "Sort modifiers" quick fix works incorrectly when method is annotated
• KT-22970 Add explicit this intention/inspection missing for lambda invocation
• KT-23109 "Remove redundant 'if' statement" inspection breaks code with labeled return
• KT-23215 "Add function to supertype" quick fix works incorrectly

IDE. Refactorings

Fixes

• KT-13255 Refactor / Rename: renaming local variable or class to existing name gives no warning
• KT-13284 Refactor / Rename: superfluous imports and FQNs in Java using @JvmOverloads functions
• KT-13907 Rename refactoring warns about name conflict if there is function with different signature but the same name
• KT-13986 Full qualified names of classes in comments should be changed after class Move, if comment contains backquotes
• KT-14671 typealias: refactor/rename should propose to rename occurrences in comments
• KT-15039 Extra usage is found for a parameter in data class in destructuring construction
• KT-15228 Extract function from inline function should create public function
• KT-15302 Reference to typealias in SAM conversion is not found
• KT-16510 Can't rename quoted identifier is
• KT-17827 Refactor / Move corrupts bound references when containing class of member element is changed
• KT-19561 Name conflict warning when renaming method to a name matching an extension method with the same name exists
• KT-20178 Refactor → Rename can't make companion object name empty
• KT-22282 Moving a Kotlin file to another package does not change imports in itself
• KT-22482 Rename refactoring insert qualifier for non related property call
• KT-22661 Refactor/Move: top level field reference is not imported automatically after move to the source root
• KT-22678 Refactor / Copy: "Class uses constructor which will be inaccessible after move" when derived class has a protected constructor
• KT-22692 Refactor/Move: unnecessary curly braces added on moving to a separate file a top level function with a top level field usage
• KT-22745 Refactor/Move inserts FQ function name at the call site if there is a field same named as the function
• KT-22747 Moving top-level function to a different (existing) file doesn't update references from Java
• KT-22751 Refactor/Rename: type alias name clash is not reported
• KT-22769 Refactor/Move: there is no warning on moving sealed class or its inheritors to another file
• KT-22771 Refactor/Move: there is no warning on moving nested class to another class with stricter visibility
• KT-22812 Refactor/Rename extension functions incorrectly conflicts with other extension functions
• KT-23065 Refactor/Move: Specify the warning message on moving sealed class inheritors without moving the sealed class itself

IDE. Script

• KT-22647 Run script Action in IDE should use Kotlin compiler from the IDE plugin

JavaScript

• KT-22019 Fix wrong list sorting order

Language design

• KT-21515 Restrict visibility of classifiers inside companion objects

Tools. CLI

• KT-22777 Unstable language version setting has no effect when attached runtime has lower version

Tools. Gradle

• KT-22824 expectedBy dependency should be expressed as compile dependency in POM
• KT-15371 Multiplatform: setting free compiler args can break build
• KT-22864 Allow multiple expectedBy configuration dependencies in Gradle
• KT-22895 'kotlin-runtime' library is missing in the compiler classpath sometimes
• KT-23085 Use proper names for the Gradle task inputs/outputs added at runtime

Tools. Incremental Compile

• KT-20516 "Unresolved reference" when project declares same class as its dependency
• KT-22542 "Source file or directory not found" for incremental compilation with Kobalt

Tools. JPS

• KT-16091 Incremental compilation ignores changes in Java static field
• KT-22995 EA-91869 - NA: LookupStorage.<init>

Tools. kapt

• KT-21735 Kapt cache was not cleared sometimes

CHANGELOG

1.2.30

Android

• KT-19300 [AS3.0] Android extensions, Parcelable: editor shows warning about incomplete implementation on a class with Parcelize annotation
• KT-22168 "Kotlin Android | Illegal Android Identifier" inspection reports non-instrumentation unit tests
• KT-22700 Android Extensions bind views with dot in ID

Compiler

New Features

• KT-17336 Introduce suspendCoroutineUninterceptedOrReturn coroutine intrinsic function
• KT-22766 Imitate "suspend" modifier in 1.2.x by stdlib function

Performance Improvements

• KT-5177 Optimize code generation for 'for' loop with withIndex()
• KT-16880 Smarter detection of tail-suspending unit invocations

Fixes

• KT-10494 IAE in CheckMethodAdapter.checkInternalName when declaring classes inside method with non-standard name
• KT-16079 Internal error when using suspend operator plus
• KT-17091 Converting to SAM Java type appends non-deterministic hash to class name
• KT-18522 Internal compiler error with IndexOutOfBoundsException, "Exception while analyzing expression"
• KT-18578 Compilation failure with @jsoninclude and default interface method
• KT-19786 Kotlin — unable to override a Java function with @nullable vararg argument
• KT-20466 JSR305 false positive for elvis operator
• KT-20705 Tail suspend call optimization doesn't work in when block
• KT-20708 Tail suspend call optiomization doesn't work in some branches
• KT-20855 Unnecessary safe-call reported on nullable type
• KT-21165 Exception from suspending function is not caught
• KT-21238 Nonsensical warning "Expected type does not accept nulls in Java, but the value may be null in Kotlin"
• KT-21258 Raw backing field value exposed via accessors?
• KT-21303 Running on JDK-10-ea-31 leads to ArrayIndexOutOfBoundsException
• KT-21642 Back-end (JVM) Internal error: Couldn't transform method node on using open keyword with suspend for a top-level function
• KT-21759 Compiler crashes on two subsequent return statements in suspend function
• KT-22029 Fold list to pair with destructuring assignment and inner when results in Exception
• KT-22345 OOM in ReturnUnitMethodReplacer
• KT-22410 invalid compiler optimization for nullable cast to reified type
• KT-22577 Compiler crashes when coroutineContext is used inside of inlined lambda

IDE

New Features

• KT-8352 Pasting Kotlin code into package could create .kt file
• KT-16710 Run configuration to run main() as a Node CLI app
• KT-16833 Allow mixing Java and Kotlin code in "Analyze Data Flow..."
• KT-21531 JS: add support for running specific test from the gutter icon with Jest testing framework

Performance Improvements

• KT-21450 Add caching for Module.languageVersionSettings
• KT-21517 OOME during find usages

Fixes

• KT-7316 Go to declaration in Kotlin JavaScript project navigates to JDK source in some cases
• KT-8563 Refactor / Rename inserts line breaks without reason
• KT-11467 Editor: var property in primary constructor is shown not underscored, same as val
• KT-13509 Don't show run line markers for top-level functions annotated with @test
• KT-13971 Kotlin Bytecode tool window: Decompile is available for incompilable code, CE at MemberCodegen.genFunctionOrProperty()
• KT-15000 Do not spell check overridden declaration names
• KT-15331 "Kotlin not configured" notification always shown for common module in multiplatform project
• KT-16333 Cannot navigate to super declaration via shortcut
• KT-16976 Introduce special SDK for Kotlin JS projects to avoid using JDK
• KT-18445 multiplatform project: provide more comfortable way to process cases when there are missed method implemenation in the implementation class
• KT-19194 Some Live Templates should probably be enabled also for "expressions" not only "statements"
• KT-20281 multiplatform:Unresolved service JavaDescriptorResolver on a file with several header declarations and gutters not shown
• KT-20470 IntelliJ indent guide/invisible brace matching hint tooltip doesn't show context
• KT-20522 Add "Build" action in "Before launch" block when create new JS run configuration (for test)
• KT-20915 Add quickfix for ‘Implicit (unsafe) cast from dynamic type’
• KT-20971 Cannot navigate to sources of compiled common dependency
• KT-21115 Incomplete actual class should still have navigation icon to expect class
• KT-21688 UIdentifier violates JvmDeclarationElement contract
• KT-21874 Unexpected IDE error "Unknown type [typealias ...]"
• KT-21958 Support "Alternative source available" for Kotlin files
• KT-21994 Collapsed comments containing * get removed in the summary line.
• KT-22179 For properties overridden in object literals, navigation to inherited properties is missing indication of a type they are overridden
• KT-22214 Front-end Internal error: Failed to analyze declaration
• KT-22230 Reformatting code to Kotlin style indents top-level typealiases with comments
• KT-22242 Semantic highlighting uses different colors for the same 'it' variable and same color for different 'it's
• KT-22301 Don't require space after label for lambda
• KT-22346 Incorrect indentation for chained context extension functions (lambdas) when using Kotlin style guide
• KT-22356 Update status of inspection "Kotlin JVM compiler configured but no stdlib dependency" after pom file update, not on re-import
• KT-22360 MPP: with "Create separate module per source set" = No expectedBy dependency is imported not transitively
• KT-22374 "Join lines" works incorrectly in case of line containing more than one string literal
• KT-22473 Regression in IntelliJ Kotlin Plugin 1.2.20, settings.gradle.kts script template is wrong
• KT-22508 Auto-formatting should insert an indentation for default parameter values
• KT-22557 Dead 'Apply' button, when setting code style
• KT-22565 Cant do PsiAnchor.create on annotation in annotation
• KT-22570 Can't add import in "Packages to Use Import with '*'" section on "Import" tab in Code Style -> Kotlin
• KT-22641 Auto-formatting adds extra indent to a closing square bracket on a separate line
• KT-22734 LinkageError: "loader constraint violation: when resolving method PsiTreeUtilKt.parentOfType()" at KotlinConverter.convertPsiElement$uast_kotlin()

IDE. Debugger

• KT-20351 Stepping over a line with two inline stdlib functions steps into the second function
• KT-21312 Confusing Kotlin (JavaScript) run configuration
• KT-21945 Double stop on same line during step over if inline call is present

IDE. Inspections and Intentions

New Features

• KT-18124 Inspection to get rid of unnecessary ticks in references
• KT-22038 Inspection to replace the usage of Java Collections methods on subtypes of MutableList with the methods from Kotlin stdlib
• KT-22152 "Create Class" quickfix should support creating the class in a new file and selecting the package for that file
• KT-22171 Add Intention for single character substring
• KT-22303 Inspection to detect Type!.inlineWithNotNullReceiver() calls
• KT-22409 Intention for changing property setter accessibility

Performance Improvements

• KT-21137 Kotlin instantiates something expensive via reflection when highlighting Java file

Fixes

• KT-15176 Remove "Create type alias" intention when called on java class
• KT-18007 Inspection doesn't suggest Maven Plugin for kotlin-stdlib-jre8
• KT-18308 'Remove braces from else statement' intention breaks code
• KT-18912 multiplatform project: Convert to enum class: header sealed class cannot convert nested objects to enum values
• KT-21114 IOE: create actual members for expected with companion
• KT-21600 suspend modifier should go after override in overridden suspend functions
• KT-21881 Replace "If" with safe access intention false positive
• KT-22054 Replace '!=' with 'contentEquals' should be replace '==' with 'contentEquals'
• KT-22097 Redundant Unit inspection false positive for single expression function
• KT-22159 "Replace return with 'if' expression" should not place return before expressions of type Nothing
• KT-22167 "Add annotation target" quick fix does nothing and disappears from menu
• KT-22221 QuickFix to remove unused constructor parameters shouldn't delete parenthesis
• KT-22335 IOE from KotlinUnusedImportInspection.scheduleOptimizeImportsOnTheFly
• KT-22339 Remove setter parameter type: error while creating problem descriptor
• KT-22364 Redundant setter is not reported for overridden fields
• KT-22484 The warning highlight for redundant !ischeck for object types isn't extended to the full operator
• KT-22538 "Redundant type checks for object" inspection application breaks smart cast for an object's field or function

IDE. Refactorings

New Features

• KT-17047 Refactorings for related standard "scoping functions" conversion: 'let' <-> 'run', 'apply' <-> 'also'

Fixes

• KT-12365 Renaming invoke function should remove operator modifier and insert function call for implicit usages
• KT-17977 Move class to upper level creates file with wrong file name
• KT-21719 Actual typealias not renamed on expected declaration rename
• KT-22200 Overriden function generated from completion is missing suspend modifier
• KT-22359 Refactor / Rename file: Throwable at RenameProcessor.performRefactoring()
• KT-22461 Rename doesn't work on private top-level members of multi-file parts
• KT-22476 Rename it parameter fails after replacing for-each with mapNotNull
• KT-22564 Rename doesn't warn for conflicts
• KT-22705 Refactor/Rename: rename of invoke function with lambda parameter to get breaks an implicit call
• KT-22708 Refactor/Rename function using some stdlib name leads to incompilable code

JavaScript

• KT-20735 JS: kotlin.test-js integration tests terminate build on failure
• KT-22638 Function reference not working in js from extension

Libraries

• KT-22620 Add support for TestNG in kotlin.test
• KT-16661 Performance overhead in string splitting in Kotlin versus Java?
• KT-22042 Suboptimal Strings#findAnyOf
• KT-21154 kotlin-test-junit doesn't provide JUnitAsserter when test body is run in another thread

Tools

• KT-22196 kotlin-compiler-embeddable bundles outdated kotlinx.coroutines since 1.1.60
• KT-22549 Service is dying during compilation

Tools. CLI

• KT-19051 Suppress Java 9 illegal access warnings

Tools. Gradle

• KT-18462 Add 'org.jetbrains.kotlin.platform.android' plugin.
• KT-18821 Gradle plugin should not resolve dependencies at configuration time

Tools. Incremental Compile

• KT-22192 Make precise java classes tracking in Gradle enabled by default

Tools. J2K

• KT-21635 J2K: create "inspection based post-processing"

Tools. REPL

• KT-12037 REPL crashes when trying to :load with incorrect filename

Tools. kapt

• KT-22350 kdoc comment preceding enum method causes compilation failure
• KT-22386 kapt3 fails when project has class named System
• KT-22468 Kapt fails to convert array type to anonymous array element type
• KT-22469 Kapt 1.2.20+ may fail to process classes with KDoc
• KT-22493 Kapt: NoSuchElementException in KotlinCliJavaFileManagerImpl if class first character is dollar sign
• KT-22582 Kapt: Enums inside enum values should be forbidden
• KT-22711 Deprecate original kapt (aka kapt1)

Previous releases

This release also includes the fixes and improvements from the previous
1.2.21 release.

CHANGELOG

1.2.30 EAP-2

Android

• KT-19300 [AS3.0] Android extensions, Parcelable: editor shows warning about incomplete implementation on a class with Parcelize annotation
• KT-22168 "Kotlin Android | Illegal Android Identifier" inspection reports non-instrumentation unit tests
• KT-22700 Android Extensions bind views with dot in ID

Compiler

New Features

• KT-17336 Introduce suspendCoroutineUninterceptedOrReturn coroutine intrinsic function
• KT-22766 Imitate "suspend" modifier in 1.2.x by stdlib function

Performance Improvements

• KT-5177 Optimize code generation for 'for' loop with withIndex()
• KT-16880 Smarter detection of tail-suspending unit invocations

Fixes

• KT-10494 IAE in CheckMethodAdapter.checkInternalName when declaring classes inside method with non-standard name
• KT-16079 Internal error when using suspend operator plus
• KT-17091 Converting to SAM Java type appends non-deterministic hash to class name
• KT-18522 Internal compiler error with IndexOutOfBoundsException, "Exception while analyzing expression"
• KT-18578 Compilation failure with @jsoninclude and default interface method
• KT-19786 Kotlin — unable to override a Java function with @nullable vararg argument
• KT-20466 JSR305 false positive for elvis operator
• KT-20705 Tail suspend call optimization doesn't work in when block
• KT-20708 Tail suspend call optiomization doesn't work in some branches
• KT-20855 Unnecessary safe-call reported on nullable type
• KT-21165 Exception from suspending function is not caught
• KT-21238 Nonsensical warning "Expected type does not accept nulls in Java, but the value may be null in Kotlin"
• KT-21258 Raw backing field value exposed via accessors?
• KT-21303 Running on JDK-10-ea-31 leads to ArrayIndexOutOfBoundsException
• KT-21642 Back-end (JVM) Internal error: Couldn't transform method node on using open keyword with suspend for a top-level function
• KT-21759 Compiler crashes on two subsequent return statements in suspend function
• KT-22029 Fold list to pair with destructuring assignment and inner when results in Exception
• KT-22345 OOM in ReturnUnitMethodReplacer
• KT-22410 invalid compiler optimization for nullable cast to reified type
• KT-22577 Compiler crashes when coroutineContext is used inside of inlined lambda

IDE

New Features

• KT-8352 Pasting Kotlin code into package could create .kt file
• KT-16710 Run configuration to run main() as a Node CLI app
• KT-16833 Allow mixing Java and Kotlin code in "Analyze Data Flow..."
• KT-21531 JS: add support for running specific test from the gutter icon with Jest testing framework

Performance Improvements

• KT-21450 Add caching for Module.languageVersionSettings
• KT-21517 OOME during find usages

Fixes

• KT-7316 Go to declaration in Kotlin JavaScript project navigates to JDK source in some cases
• KT-8563 Refactor / Rename inserts line breaks without reason
• KT-11467 Editor: var property in primary constructor is shown not underscored, same as val
• KT-13509 Don't show run line markers for top-level functions annotated with @test
• KT-13971 Kotlin Bytecode tool window: Decompile is available for incompilable code, CE at MemberCodegen.genFunctionOrProperty()
• KT-15000 Do not spell check overridden declaration names
• KT-15331 "Kotlin not configured" notification always shown for common module in multiplatform project
• KT-16333 Cannot navigate to super declaration via shortcut
• KT-16976 Introduce special SDK for Kotlin JS projects to avoid using JDK
• KT-18445 multiplatform project: provide more comfortable way to process cases when there are missed method implemenation in the implementation class
• KT-19194 Some Live Templates should probably be enabled also for "expressions" not only "statements"
• KT-20281 multiplatform:Unresolved service JavaDescriptorResolver on a file with several header declarations and gutters not shown
• KT-20470 IntelliJ indent guide/invisible brace matching hint tooltip doesn't show context
• KT-20522 Add "Build" action in "Before launch" block when create new JS run configuration (for test)
• KT-20915 Add quickfix for ‘Implicit (unsafe) cast from dynamic type’
• KT-20971 Cannot navigate to sources of compiled common dependency
• KT-21115 Incomplete actual class should still have navigation icon to expect class
• KT-21688 UIdentifier violates JvmDeclarationElement contract
• KT-21874 Unexpected IDE error "Unknown type [typealias ...]"
• KT-21958 Support "Alternative source available" for Kotlin files
• KT-21994 Collapsed comments containing * get removed in the summary line.
• KT-22179 For properties overridden in object literals, navigation to inherited properties is missing indication of a type they are overridden
• KT-22214 Front-end Internal error: Failed to analyze declaration
• KT-22230 Reformatting code to Kotlin style indents top-level typealiases with comments
• KT-22242 Semantic highlighting uses different colors for the same 'it' variable and same color for different 'it's
• KT-22301 Don't require space after label for lambda
• KT-22346 Incorrect indentation for chained context extension functions (lambdas) when using Kotlin style guide
• KT-22356 Update status of inspection "Kotlin JVM compiler configured but no stdlib dependency" after pom file update, not on re-import
• KT-22360 MPP: with "Create separate module per source set" = No expectedBy dependency is imported not transitively
• KT-22374 "Join lines" works incorrectly in case of line containing more than one string literal
• KT-22473 Regression in IntelliJ Kotlin Plugin 1.2.20, settings.gradle.kts script template is wrong
• KT-22508 Auto-formatting should insert an indentation for default parameter values
• KT-22557 Dead 'Apply' button, when setting code style
• KT-22565 Cant do PsiAnchor.create on annotation in annotation
• KT-22570 Can't add import in "Packages to Use Import with '*'" section on "Import" tab in Code Style -> Kotlin
• KT-22641 Auto-formatting adds extra indent to a closing square bracket on a separate line
• KT-22734 LinkageError: "loader constraint violation: when resolving method PsiTreeUtilKt.parentOfType()" at KotlinConverter.convertPsiElement$uast_kotlin()

IDE. Debugger

• KT-20351 Stepping over a line with two inline stdlib functions steps into the second function
• KT-21312 Confusing Kotlin (JavaScript) run configuration
• KT-21945 Double stop on same line during step over if inline call is present

IDE. Inspections and Intentions

New Features

• KT-18124 Inspection to get rid of unnecessary ticks in references
• KT-22038 Inspection to replace the usage of Java Collections methods on subtypes of MutableList with the methods from Kotlin stdlib
• KT-22152 "Create Class" quickfix should support creating the class in a new file and selecting the package for that file
• KT-22171 Add Intention for single character substring
• KT-22303 Inspection to detect Type!.inlineWithNotNullReceiver() calls
• KT-22409 Intention for changing property setter accessibility

Performance Improvements

• KT-21137 Kotlin instantiates something expensive via reflection when highlighting Java file

Fixes

• KT-15176 Remove "Create type alias" intention when called on java class
• KT-18007 Inspection doesn't suggest Maven Plugin for kotlin-stdlib-jre8
• KT-18308 'Remove braces from else statement' intention breaks code
• KT-18912 multiplatform project: Convert to enum class: header sealed class cannot convert nested objects to enum values
• KT-21114 IOE: create actual members for expected with companion
• KT-21600 suspend modifier should go after override in overridden suspend functions
• KT-21881 Replace "If" with safe access intention false positive
• KT-22054 Replace '!=' with 'contentEquals' should be replace '==' with 'contentEquals'
• KT-22097 Redundant Unit inspection false positive for single expression function
• KT-22159 "Replace return with 'if' expression" should not place return before expressions of type Nothing
• KT-22167 "Add annotation target" quick fix does nothing and disappears from menu
• KT-22221 QuickFix to remove unused constructor parameters shouldn't delete parenthesis
• KT-22335 IOE from KotlinUnusedImportInspection.scheduleOptimizeImportsOnTheFly
• KT-22339 Remove setter parameter type: error while creating problem descriptor
• KT-22364 Redundant setter is not reported for overridden fields
• KT-22484 The warning highlight for redundant !ischeck for object types isn't extended to the full operator
• KT-22538 "Redundant type checks for object" inspection application breaks smart cast for an object's field or function

IDE. Refactorings

New Features

• KT-17047 Refactorings for related standard "scoping functions" conversion: 'let' <-> 'run', 'apply' <-> 'also'

Fixes

• KT-12365 Renaming invoke function should remove operator modifier and insert function call for implicit usages
• KT-17977 Move class to upper level creates file with wrong file name
• KT-21719 Actual typealias not renamed on expected declaration rename
• KT-22200 Overriden function generated from completion is missing suspend modifier
• KT-22359 Refactor / Rename file: Throwable at RenameProcessor.performRefactoring()
• KT-22461 Rename doesn't work on private top-level members of multi-file parts
• KT-22476 Rename it parameter fails after replacing for-each with mapNotNull
• KT-22564 Rename doesn't warn for conflicts
• KT-22705 Refactor/Rename: rename of invoke function with lambda parameter to get breaks an implicit call
• KT-22708 Refactor/Rename function using some stdlib name leads to incompilable code

JavaScript

• KT-20735 JS: kotlin.test-js integration tests terminate build on failure
• KT-22638 Function reference not working in js from extension

Libraries

• KT-22620 Add support for TestNG in kotlin.test
• KT-16661 Performance overhead in string splitting in Kotlin versus Java?
• KT-22042 Suboptimal Strings#findAnyOf
• KT-21154 kotlin-test-junit doesn't provide JUnitAsserter when test body is run in another thread

Tools

• KT-22196 kotlin-compiler-embeddable bundles outdated kotlinx.coroutines since 1.1.60
• KT-22549 Service is dying during compilation

Tools. CLI

• KT-19051 Suppress Java 9 illegal access warnings

Tools. Gradle

• KT-18462 Add 'org.jetbrains.kotlin.platform.android' plugin.
• KT-18821 Gradle plugin should not resolve dependencies at configuration time

Tools. Incremental Compile

• KT-22192 Make precise java classes tracking in Gradle enabled by default

Tools. J2K

• KT-21635 J2K: create "inspection based post-processing"

Tools. REPL

• KT-12037 REPL crashes when trying to :load with incorrect filename

Tools. kapt

• KT-22350 kdoc comment preceding enum method causes compilation failure
• KT-22386 kapt3 fails when project has class named System
• KT-22468 Kapt fails to convert array type to anonymous array element type
• KT-22469 Kapt 1.2.20+ may fail to process classes with KDoc
• KT-22493 Kapt: NoSuchElementException in KotlinCliJavaFileManagerImpl if class first character is dollar sign
• KT-22582 Kapt: Enums inside enum values should be forbidden
• KT-22711 Deprecate original kapt (aka kapt1)

CHANGELOG

1.2.30 EAP

Compiler

New Features

• KT-17336 Introduce suspendCoroutineUninterceptedOrReturn coroutine intrinsic function

Performance Improvements

• KT-5177 Optimize code generation for 'for' loop with withIndex()
• KT-16880 Smarter detection of tail-suspending unit invocations

Fixes

• KT-10494 IAE in CheckMethodAdapter.checkInternalName when declaring classes inside method with non-standard name
• KT-16079 Internal error when using suspend operator plus
• KT-20705 Tail suspend call optimization doesn't work in when block
• KT-20708 Tail suspend call optiomization doesn't work in some branches
• KT-21165 Exception from suspending function is not caught
• KT-21258 Raw backing field value exposed via accessors?
• KT-21303 Running on JDK-10-ea-31 leads to ArrayIndexOutOfBoundsException
• KT-21642 Back-end (JVM) Internal error: Couldn't transform method node on using open keyword with suspend for a top-level function
• KT-21759 Compiler crashes on two subsequent return statements in suspend function
• KT-22029 Fold list to pair with destructuring assignment and inner when results in Exception
• KT-22345 OOM in ReturnUnitMethodReplacer

IDE

New Features

• KT-16833 Allow mixing Java and Kotlin code in "Analyze Data Flow..."

Performance Improvements

• KT-21450 Add caching for Module.languageVersionSettings
• KT-21517 OOME during find usages

Fixes

• KT-7316 Go to declaration in Kotlin JavaScript project navigates to JDK source in some cases
• KT-11467 Editor: var property in primary constructor is shown not underscored, same as val
• KT-13509 Don't show run line markers for top-level functions annotated with @test
• KT-13971 Kotlin Bytecode tool window: Decompile is available for incompilable code, CE at MemberCodegen.genFunctionOrProperty()
• KT-15000 Do not spell check overridden declaration names
• KT-16333 Cannot navigate to super declaration via shortcut
• KT-16976 Introduce special SDK for Kotlin JS projects to avoid using JDK
• KT-19194 Some Live Templates should probably be enabled also for "expressions" not only "statements"
• KT-20470 IntelliJ indent guide/invisible brace matching hint tooltip doesn't show context
• KT-20915 Add quickfix for ‘Implicit (unsafe) cast from dynamic type’
• KT-21688 UIdentifier violates JvmDeclarationElement contract
• KT-21958 Support "Alternative source available" for Kotlin files
• KT-21994 Collapsed comments containing * get removed in the summary line.
• KT-22179 For properties overridden in object literals, navigation to inherited properties is missing indication of a type they are overridden
• KT-22214 Front-end Internal error: Failed to analyze declaration
• KT-22230 Reformatting code to Kotlin style indents top-level typealiases with comments
• KT-22242 Semantic highlighting uses different colors for the same 'it' variable and same color for different 'it's
• KT-22356 Update status of inspection "Kotlin JVM compiler configured but no stdlib dependency" after pom file update, not on re-import
• KT-22374 "Join lines" works incorrectly in case of line containing more than one string literal
• KT-22473 Regression in IntelliJ Kotlin Plugin 1.2.20, settings.gradle.kts script template is wrong

IDE. Debugger

• KT-20351 Stepping over a line with two inline stdlib functions steps into the second function
• KT-21945 Double stop on same line during step over if inline call is present

IDE. Inspections and Intentions

New Features

• KT-22038 Inspection to replace the usage of Java Collections methods on subtypes of MutableList with the methods from Kotlin stdlib
• KT-22171 Add Intention for single character substring
• KT-22409 Intention for changing property setter accessibility

Performance Improvements

• KT-21137 Kotlin instantiates something expensive via reflection when highlighting Java file

Fixes

• KT-18007 Inspection doesn't suggest Maven Plugin for kotlin-stdlib-jre8
• KT-18308 'Remove braces from else statement' intention breaks code
• KT-18912 multiplatform project: Convert to enum class: header sealed class cannot convert nested objects to enum values
• KT-21600 suspend modifier should go after override in overridden suspend functions
• KT-21881 Replace "If" with safe access intention false positive
• KT-22054 Replace '!=' with 'contentEquals' should be replace '==' with 'contentEquals'
• KT-22159 "Replace return with 'if' expression" should not place return before expressions of type Nothing
• KT-22221 QuickFix to remove unused constructor parameters shouldn't delete parenthesis
• KT-22335 IOE from KotlinUnusedImportInspection.scheduleOptimizeImportsOnTheFly
• KT-22339 Remove setter parameter type: error while creating problem descriptor

IDE. Refactorings

• KT-17047 Refactorings for related standard "scoping functions" conversion: 'let' <-> 'run', 'apply' <-> 'also'
• KT-22200 Overriden function generated from completion is missing suspend modifier
• KT-22359 Refactor / Rename file: Throwable at RenameProcessor.performRefactoring()
• KT-22461 Rename doesn't work on private top-level members of multi-file parts

JavaScript

• KT-20735 JS: kotlin.test-js integration tests terminate build on failure

Libraries

• KT-16661 Performance overhead in string splitting in Kotlin versus Java?
• KT-22042 Suboptimal Strings#findAnyOf

Tools

• KT-22196 kotlin-compiler-embeddable bundles outdated kotlinx.coroutines since 1.1.60

Tools. CLI

• KT-19051 Suppress Java 9 illegal access warnings

Tools. Gradle

• KT-18462 Add 'org.jetbrains.kotlin.platform.android' plugin.

Tools. J2K

• KT-21635 J2K: create "inspection based post-processing"

Fixes

• KT-22349 Android: creating new Basic activity fails with Throwable: "Inconsistent FILE tree in SingleRootFileViewProvider" at SingleRootFileViewProvider.checkLengthConsistency()
• KT-22459 Remove .proto files from kotlin-reflect.jar

Full changelog

Changes since 1.2.20-eap-33

Compiler

• KT-17609 Intrinsic suspend val coroutineContext
• KT-20864 Provide ReadOnly and Mutable annotations to control java collection mutability in kotlin
• KT-20429 False-positive 'Unused return value of a function with lambda expression body' in enum constant constructor

IDE

New Features

• KT-14670 Support kotlinPackageName() macro in live templates
• KT-14951 Editor: navigate actions could be available in intention menu (as done in Java)
• KT-15320 Live templates: please add function which returns the "outer" class name
• KT-20067 Return label hints
• KT-20533 Show "this" and "it" type hints in lambdas.
• KT-20614 Change location of initial parameter type hint when parameters are on multiple lines
• KT-21949 Please add a separate Color Scheme settings for properties synthesized from Java accessors
• KT-21974 Editor color scheme option for Kotlin typealias names

Fixes

• KT-11503 cmd+shift+enter action in .kt files does not work on empty lines
• KT-17217 Navigate to symbol: hard to choose between a lot of extension overloads
• KT-18674 Join Lines should join strings
• KT-19524 "Local variable type hints" should respect static imports
• KT-21010 gutter "Is subclassed by" should show actual subclass from the all platform modules in IDEA 2017.3/2018.1
• KT-21036 Throwable “Access is allowed from event dispatch thread only.” after creating nine similar classes with functions.
• KT-21213 multiline kdoc - intellij joins lines together without space
• KT-21592 -Xjsr305=strict not taken into account during the kotlin files compilation in Idea (maven)
• KT-22050 Redundant parameter type hint on SAM
• KT-22071 Formatter insists on increasing indentation in forEach lambda
• KT-22093 Unnecessary line wrap with new Kotlin code style
• KT-22111 Error while indexing PsiPlainTextFileImpl cannot be cast to KtFile
• KT-22121 Enter in empty argument list should apply normal indent if "Continuation indent for argument list" is off

IDE. Inspections and Intentions

New Features

• KT-16260 Add intention to specify all types explicitly in destructuring assignment
• KT-21547 Allow separate regex for test class and function names in IDE inspection
• KT-21741 Inspection to detect is checks for object types
• KT-21950 Enable quick-fixes for annotator-reported problems in "Inspect Code"
• KT-22103 SortModifiersInspection should report annotations after modifiers

Fixes

• KT-12814 Specify type explicitly produces erroneous code when platform type overrides not-null type
• KT-15180 Incorrect quickfix 'Specify type explicitly'
• KT-17816 "Replace elvis with if" produce nasty code when safe casts are involved
• KT-18396 Bad quickfix for wrong nested classes in inner class
• KT-19073 No-op quick fix for "Convert lambda to reference" IDE suggestion
• KT-19283 Kotlin KProperty reference cannot be converted to lambda
• KT-19736 Rephrase text in the unconventional property name inspection
• KT-19771 Preserve old "Convert to expression body" range
• KT-20437 Naming convetions inspection: Add separate inspection for top-level and object properties
• KT-20620 Replace operator with function call breaks code
• KT-21414 OverridersSearch attempts to create nameless fake light method
• KT-21780 Wrong redundant setter inspection
• KT-21837 Don't require documentation on tests and test classes
• KT-21929 Inappropriate quick fix for a sealed class instantiation
• KT-21983 Do not suggest to remove explicit Unit type for expression body

IDE. Refactorings

• KT-21508 java.lang.AssertionError: PsiLiteralExpression on property safe delete in Idea 173
• KT-21536 Rename refactoring sometimes doesn't quite work
• KT-21604 Rename package missing title
• KT-21963 Refactor / Inline Property: "null" in place of number of occurrences of local variable references
• KT-21964 Refactor / Inline: on declaration of element with one usage "Inline and keep" choice is not suggested
• KT-21965 Refactor / Inline: wording in dialog could be unified

Libraries

• KT-16348 KotlinJS - String.toBoolean()
• KT-21191 Can't wrap exceptions in multiplatform projects
• KT-21861 NumberFormatException in multiplatform project

Tools. Gradle

• KT-15753 Support cacheable tasks
• KT-17656 Kotlin and Kotlin Android plugin not using available build caches
• KT-20017 Support local (non-relocatable) Gradle build cache
• KT-20598 Missing input annotations on AbstractKotlinCompileTool
• KT-20604 Kotlin plugin breaks relocatability and compile avoidance for Java compile tasks
• KT-21203 Kotlin gradle plugin does not create proper Ivy metadata for dependencies
• KT-21261 Gradle plugin 1.1.60 creates "build-history.bin" outside project.buildDir
• KT-21805 Gradle plugin does not work with JDK 1.7 (KaptGradleModel)
• KT-21806 Gradle Plugin: Using automatic dependency versions with 'maven-publish' plugin does not include dependency version in generated publication POMs

Full changelog for 1.2.20

Changes since 1.2.20-eap-11

Compiler

• KT-21982 Recognize Checker Framework declaration annotations
• KT-21919 Invalid MethodParameters attribute generated for "$DefaultImpls" synthetic class with javaParameters=true

IDE

• KT-4001 Allow to set arguments indent to 1 tab (currently two and not customized)
• KT-21469 Wrap property initializers after equals sign
• KT-9562 Wrong indent after Enter after an annotation
• KT-12176 Formatter could reformat long primary constructors
• KT-12862 Formatting: Weird wrapping setting for long ?: operator
• KT-15099 Odd code formatting when chaining lambdas and splitting lines on operators
• KT-17843 Don't show parameter name hints when calling Java methods with unknown parameter names
• KT-17964 Local variable type hints in editor for anonymous object
• KT-17965 Do not shown argument name hints for assert
• KT-18829 Do not show parameter name hints for mapOf
• KT-18839 Semantic highlighting not work for local variables in init
• KT-19727 Code style: New line after '(' with anonymous object or multi-line lambda unexpected behavior
• KT-19820 Strange highlightning for enum constructor
• KT-19915 TODO calls not blue highlighted in lambdas/DSLs
• KT-20314 Kotlin formatter does not respect annotations code style settings
• KT-20380 Configure Kotlin plugin updates dialog does not open without opened project
• KT-21214 Fix funcion selection in kotlin
• KT-21275 Don't show argument name hints in calls of methods on 'dynamic' type
• KT-21645 weird parameter hint position
• KT-21833 type hints shown when destructing triple with type parameters
• KT-11023 Inspection to highlight usages of Collections.sort() and replace them with .sort() method from Kotlin stdlib
• KT-21510 Add inspection to add/remove this to/from bound callable
• KT-21573 Code Style Inspection: to -> Pair function used not in infix form
• KT-21698 Create interface shouldn't suggest to declare it inside a class which implements it
• KT-17212 Refactor / Inline Function: with 1 occurrence both "Inline all" and "Inline this only" are suggested
• KT-21288 Change Signature refactoring fails to change signature of overriders

Libraries

• KT-21868 Data race in SafePublicationLazyImpl
• KT-21918 toTypedArray() implementation is inefficient and not thread-safe
• KT-22003 Replace Regex constructor-like functions with secondary constructors

Tools

• KT-21628 Can't find referenced class kotlin.internal.annotations.AvoidUninitializedObjectCopyingCheck
• KT-21777 RMI "Connection refused" errors with daemon
• KT-21992 @transient warning for lazy property
• KT-21596 Improve Kapt Gradle Plugin to be more friendly for Kotlin-DSL
• KT-20840 Multiplatform IC fails if expected or actual file is modified separately
• KT-17561 embedding kotlin-script-utils may cause version conflicts e.g. with guava
• KT-17921 The JSR 223 scripting engine fails to eval anything after encountering an unresolved reference
• KT-21075 KotlinJsr223JvmLocalScriptEngineFactory does not well with kotlin-compiler-embeddable
• KT-21141 Kotlin script: KotlinJsr223JvmLocalScriptEngine.state.history.reset() seems not clearing the compiler cache

Full changelog for 1.2.20

Android

• KT-20085 Android Extensions: ClassCastException after changing type of view in layout XML
• KT-20235 Error, can't use plugin kotlin-android-extensions
• KT-20269 Mark 'kapt.kotlin.generated' as a source root automatically in Android projects
• KT-20545 Parcelable: Migrate to canonical NEW-DUP-INVOKESPECIAL form
• KT-20742 @serializable and @parcelize do not work together
• KT-20928 @parcelize. Verify Error for Android Api 19

Binary Metadata

• KT-11586 Class literal annotation arguments are not yet supported in AnnotationSerializer

Compiler

New Features

• KT-17944 Allow 'expect' final member be implemented by 'actual' open member

Performance Improvements

• KT-21322 for-in-char-sequence loop improvements
• KT-21323 Decreasing range loop improvements

Fixes

• KT-4174 Verify error on lambda with closure in local class super call
• KT-10473 Inapplicable diagnostics for mixed JS / JVM projects
• KT-12541 VerifyError: Bad type on operand stack for local variable captured in local class
• KT-13454 VerifyError on capture of outer class properties in closure inside inner class constructor
• KT-14148 VerifyError: Bad type on operand stack for anonymous type inheriting inner class
• KT-18254 enumValueOf and enumValues throw UnsupportedOperationException when used within a non-inline function block
• KT-18514 IllegalStateException on compile object that inherits its inner interface or class
• KT-18639 VerifyError: Bad type on operand stack
• KT-19188 Nondeterministic method order in class files using DefaultImpls
• KT-19827 Strange VerifyError in simple Example
• KT-19928 Analyze / Inspect Code: ISE "Concrete fake override public final fun ()" at BridgesKt.findConcreteSuperDeclaration()
• KT-20433 NPE during JVM code generation
• KT-20639 Obsolete term "native" used in error message
• KT-20802 USELESS_CAST diagnostic in functions with expression body
• KT-20873 False CAST_NEVER_SUCCEEDS when upcasting Nothing
• KT-20903 Method reference to expect function results in bogus resolution ambiguity
• KT-21105 Compiler incorrectly optimize the operator in with a floating point type range with NaN bound.
• KT-21146 ArrayIndexOutOfBoundsException at org.jetbrains.kotlin.codegen.MemberCodegen.generateMethodCallTo(MemberCodegen.java:841)
• KT-21267 Report pre-release errors if pre-release compiler is run with a release language version
• KT-21321 for-in-array loop improvements
• KT-21343 Compound assignment operator compiles incorrectly when LHS is a property imported from object
• KT-21354 Inconsistent behavior of 'for-in-range' loop if range is an array variable modified in loop body
• KT-21532 Enum constructor not found
• KT-21535 SAM wrapper is not created for a value of functional type in delegating or super constructor call in secondary constructor
• KT-21671 Inline sam wrapper during inline in another module

IDE

New Features

• KT-13378 Provide ability to configure highlighting for !! in expressions and ? in types
• KT-17928 Support code folding for primary constructors
• KT-20591 Show @StringRes/@integerres annotations in parameter info
• KT-20952 "Navigate | Related symbol" should support expect/actual navigation
• KT-21229 Make it possible to explicitly select "latest" language/API version

Performance Improvements

• KT-17367 Rebuild requested for index KotlinJavaScriptMetaFileIndex
• KT-21557 IntelliJ 2017.3 Gradle Performance Regression
• KT-21632 Freezing on typing
• KT-21701 IDEA 2017.3 high CPU usage

Fixes

• KT-15254 Please use Platform icons for "Run" icon in gutter
• KT-17254 Remove obsolete unfold-icons in structure view
• KT-17838 Can't report exceptions from the Kotlin plugin 1.1.4-dev-119 in IDEA #IU-171.4424.37
• KT-19012 Data Flow from here: doesn't find template usages
• KT-19017 Data Flow from here doesn't find usage in range position of for cycle
• KT-19018 Data Flow from here doesn't find any usages of for-variable
• KT-19036 Data Flow from here: please find calls of extension too
• KT-19039 Data Flow from here: please find cases when an investigated variable is transferred as a parameter into a library function
• KT-19087 Data flow to here: usages with explicit receiver are not found
• KT-19089 Data Flow to here: assigned values are not found if an investigated property is a delegated one
• KT-19104 Data Flow from here: usage of parameter or variable not found when used as lambda receiver/parameter
• KT-19106 Data Flow from here: show point of call of a function used as a parameter investigated parameter/variable
• KT-19112 Data Flow to here for a function (or its return value) doesn't find shorten forms of assignments
• KT-19519 Structure view is not updated properly for function classes
• KT-19823 Kotlin Gradle project import into IntelliJ: import kapt generated classes into classpath
• KT-19824 Please provide a separate icon for a common library
• KT-20096 Kotlin Gradle script: SOE after beginning of Pair definition before some script section
• KT-20329 multiplatform: gutter "Is subclassed by" should show expect subclass from the common module
• KT-20521 Kotlin Gradle script: valid build.gradle.kts is red and becomes normal only after reopening the project
• KT-20603 Facet import: when API version > language version, set API version = language version, not to 1.0
• KT-20782 Non-atomic trees update
• KT-20813 SAM with receiver: call with SAM usage is compiled with Gradle, but not with JPS
• KT-20880 Add documentation quick fix should create multiline comment and place caret in right place
• KT-20883 Provide more information in "Missing documentation" inspection message
• KT-20884 Functions with receivers should allow [this] in KDoc
• KT-20937 Exception thrown on RMB click on folder in Kotlin project
• KT-20938 IDE: kotlinc.xml with KotlinCommonCompilerArguments/freeArgs: XSE: "Cannot deserialize class CommonCompilerArguments$DummyImpl" at BaseKotlinCompilerSettings.loadState()
• KT-20953 "Choose actual" popup shows redundant information
• KT-20985 Additional reimport is required in 2017.3/2018.1 idea after creating or importing mp project
• KT-20987 (PerModulePackageCache miss) ISE: diagnoseMissingPackageFragment
• KT-21002 "Highlight usages of identifier under caret" should work for "it"
• KT-21076 Recursive Companion.ivoke() call should be marked with according icon
• KT-21132 containsKey() in SoftValueMap considered pointless
• KT-21150 Do not infer compiler version from build.txt
• KT-21200 The Structure-view for Kotlin files could be improved
• KT-21318 Highlighting of function exit points does not work if the function is a getter for property
• KT-21363 IDE: kotlinc.xml with KotlinCommonCompilerArguments: build fails with UOE: "Operation is not supported for read-only collection" at EmptyList.clear()
• KT-21409 UAST: Super-call arguments are not modeled/visited
• KT-21418 Gradle based project in IDEA 181: Kotlin facets are not created
• KT-21441 Folding multiline strings adds a space at the start if there is not one.
• KT-21546 java.lang.IllegalArgumentException: Unexpected container fatal IDE error
• KT-21575 Secondary constructor call body is missing
• KT-21733 Structure view is not updated
• KT-21745 Warning and quickfix about kotlin-stdlib-jre7/8 -> kotlin-stdlib-jdk7/8 in Maven
• KT-21746 Warning and quickfix about kotlin-stdlib-jre7/8 -> kotlin-stdlib-jdk7/8 in Gradle
• KT-21756 Find Usages for "type" in ts2kt provokes exception
• KT-21770 Pasting $this into an interpolated string shouldn't escape $
• KT-21852 Custom API version is lost when settings are reopen after restarting IDE

IDE. Completion

• KT-13220 Completion for non-primary-constructor properties should suggest names with types instead of types
• KT-12797 Code completion does not work for inner in base class
• KT-16402 AssertionError on completing expression after template in string literal
• KT-20166 Completion: property declaration completion should be greedy if tab pressed
• KT-20506 Second smart completion suggests the same value recursively

IDE. Debugger

• KT-17514 Debugger, evaluate value: cannot find local variable error on attempt to evaluate outer variable
• KT-20962 NullPointerException because of nullable location in debugger
• KT-21538 "Step into" method doesn't work after adding lambda parameter to the call
• KT-21820 Debugger: Evaluation fails for instance properties (older Android SDKs)

IDE. Inspections and Intentions

New Features

• KT-4580 Intention + inspection to convert between explicit and implicit 'this'
• KT-13702 Issue a warning when equals is called recursively within itself
• KT-18449 multiplatform project: provide a quick fix "Implement methods" for a impl class
• KT-18828 Provide an intention action to move a companion object member to top level
• KT-19103 Inspection to remove unnecessary suspend modifier
• KT-20484 Add quick fix to add required target to annotation used on a type
• KT-20492 Offer "Simplify" intention for 'when' expression where only one branch is known to be true
• KT-20615 Inspection to detect usages of values incorrectly marked by Kotlin as const from Java code
• KT-20631 Inspection to detect use of Unit as a standalone expression
• KT-20644 Warning for missing const paired with val modifier for primitives and strings
• KT-20714 Inspection for self-assigment of properties
• KT-21023 Inspection to highlight variables / functions with implicit Nothing? type
• KT-21560 Inspection to sort modifiers

Fixes

• KT-15941 "Convert to secondary constructor" produces invalid code for generic property with default value
• KT-16340 "Unused receiver parameter" for invoke operator on companion object
• KT-17161 IDE suggest to replace a for loop with forEach to aggresively
• KT-17332 Intention to replace forEach with a 'for' loop should convert return@forEach to continue
• KT-17730 Incorrect suggestion to replace loop with negation to any{}
• KT-18816 IDEA suggests replacing for-in-range with stdlib operations
• KT-18881 Invalid "Loop can be replaced with stdlib operations" warning when class has add() function
• KT-19560 Do not warn about receiver parameter not used for companion object
• KT-19977 Convert Lambda to reference produces red code when wrong implicit receiver is in scope
• KT-20091 "Convert object literal to class" should create inner class if necessary
• KT-20300 "Variable can be inlined" should not be suggested if there's a variable with the same name in nested scope
• KT-20349 Convert lambda to reference for trailing lambda inserts parameter names for all arguments if at least one named argument was passed
• KT-20435 False "function is never used" warning
• KT-20622 Don't propose “Remove explicit type specification” when it can change semantic?
• KT-20763 Wrong resulting code for "add star projection" quick-fix for inner class with generic outer one
• KT-20887 Missing documentation warning shouldn't be triggered for a member of a private class
• KT-20888 Documentation should be inherited from Map.Entry type
• KT-20889 Members of anonymous objects should be treated as private and not trigger "Missing documentation" warning
• KT-20894 "Add type" quick fix does not take into account vararg modifier
• KT-20901 IntelliJ autocorrect to add parameter to data class constructor should make the parameter a val
• KT-20981 False positive for "redundant super" in data class
• KT-21025 Kotlin UAST violates JvmDeclarationUElement contract by employing JavaUAnnotation
• KT-21061 Cant work with UElement.kt in IDEA with 1.2.0-rc-39: "Stub index points to a file without PSI"
• KT-21104 Do not propose to make local lateinit var immutable
• KT-21122 QuickFix to create member for expect class shouldn't add body
• KT-21159 Fix signature invoked from Java breaks Kotlin code
• KT-21179 Remove empty class body on companion object breaks code
• KT-21192 Confusing "unused expression"
• KT-21237 ReplaceWith incorrectly removes property assignment
• KT-21332 Create from usage: do not propose to create abstract function in non-abstract class
• KT-21373 'Remove redundant let' quickfix does not work with in
• KT-21497 Inspection considers if block to be a lambda
• KT-21544 "Add type" quick fix incorrectly processes vararg modifier with primitive type array initializer
• KT-21603 "Join declaration and assignment" should remove 'lateinit' for 'var'
• KT-21612 The "Remove redundant getter" inspection removes the type specifier
• KT-21726 "arrayOf can be replaced with literal" inspection quick fix produces incompilable result in presence of spread operator
• KT-21727 "Redundant spread operator" inspection does not report array literal

IDE. Refactorings

New Features

• KT-20095 Nice to have: Allow conversion of selected companion methods to methods with @jvmstatic

Fixes

• KT-15840 Introduce type alias: don't change not-nullable type with nullable typealias
• KT-18594 Refactor / Extract (Functional) Parameter are available for annotation arguments, but fail with AE: "Body element is not found"
• KT-20146 IAE “parameter 'name' of NameUtil.splitNameIntoWords must not be null” at renaming class
• KT-20335 Refactor → Extract Type Parameter: “AWT events are not allowed inside write action” after processing duplicates
• KT-20402 Throwable “PsiElement(IDENTIFIER) by KotlinInplaceParameterIntroducer” on calling Refactor → Extract Parameter for default values
• KT-20403 AE “Body element is not found” on calling Refactor → Extract Parameter for default values in constructor of class without body
• KT-20790 Refactoring extension function/property overagressive
• KT-20766 Typealias end-of-line is removed when moving function and typealias to new file
• KT-21071 Cannot invoke move refactoring on a typealias
• KT-21162 Adding parameters to kotlin data class leads to compilation error
• KT-21334 Extract variable doesn't take into account the receiver of a bound callable reference
• KT-21371 Rename refactoring sometimes erases identifier being renamed when popping up name proposals
• KT-21530 KNPE in introduce variable

JavaScript

New Features

• KT-20210 [JS] Ultra-fast builds for development

Performance Improvements

• KT-2218 JS: Optimise in checks for number ranges
• KT-20932 JS: Make withIndex() on arrays intrinsic
• KT-21160 JS: generate switch statement for when statement when possible

Fixes

• KT-7653 JS: TypeError when try to access to "simple" property (w/o backing field at runtime)
• KT-18963 javascript project: No output directory found for Module 'xxx_test' production on JPS compiling
• KT-19290 JS integer overflow for unaryMinus
• KT-19826 JS: don't remove debugger statement from suspend functions
• KT-20580 JS: JSON.stringify could improve 'replacer' argument handling
• KT-20694 JS: add missed parts to JS Date
• KT-20737 JS: cache KProperty instances that used to access to delegated property
• KT-20738 JS: remove useless calls to constructor of KProperty* (PropertyMetadata) when it generated for access to delegated property
• KT-20854 val parameters of type kotlin.Char aren't boxed
• KT-20898 JS: inline js with for without initializer causes compiiler to crash
• KT-20905 JS: compiler crashes on invalid inline JavaScript code instead of reporting error
• KT-20908 JS frontend crashes on uncompleted call to function with reified parameters
• KT-20978 JS: inline doesn't work for Array's constructor when it called through typealias
• KT-20994 JS extension property in interface problem
• KT-21004 JS: don't use short-circuit operators when translating Boolean.and/or(Boolean)
• KT-21026 JS: wrong code generated for suspend fun that calls inline suspend fun as a tail call.
• KT-21041 'TypeError: ... is not a function' for lambda with closure passed as an argument to super type constructor
• KT-21043 JS: inlining coroutine from other module sometimes causes incorrect code generated
• KT-21093 Kotlin.JS doesnt escape ‘in’ identifier and conflicts with in keyword
• KT-21245 JS: interface function with default parameter, overridden by other interface indirectly cannot be found at runtime
• KT-21307 JS DCE does not remap paths to sources
• KT-21309 JS: incorrect source map generated for inline lambda when it's last expression is a statement-like expression (e.g. when or try/catch)
• KT-21317 JS: safe call to suspend function returning Unit causes incorrect
• KT-21421 JS: accesors of overridden char properties with backing fields aren't boxed
• KT-21468 JS: don't use enum entry's name for when over external enums

Language design

• KT-10532 ISE by ThrowingLexicalScope at compile time with specific override chain

Libraries

• KT-18789 Delegating val to out-projected MutableMap results in cast to Nothing
• KT-18869 Generating intrinsified 'for-in-progression-with-step' loop requires exposing getProgressionLastElement functions (currently internal)
• KT-20968 Improve docs for String.format and String.Companion.format
• KT-21828 JS: The List produced by the IntArray.asList function causes weird results

Reflection

• KT-20875 Support Void.TYPE as underlying Class object for KClass
• KT-21453 NPE in TypeSignatureMappingKt#computeInternalName

Tools

• KT-20298 Lint warning when using @parcelize with delegated properties
• KT-20299 Android non-ASCII TextView Id Unresolved Reference Bug
• KT-20717 @parcelize Creator.newArray method is generated incorrectly
• KT-20751 kotlin-spring compiler plugin does not open @Validated classes
• KT-21171 _$_findViewCache and _$_findCachedViewById are created in Activity subclass without Kotlin Android Extensions.

Tools. Gradle

• KT-20892 Support module name option in K2MetadataCompilerArguments
• KT-17621 Incremental compilation is very slow when Java file is modified
• KT-14125 Android-extensions don't track xml changes well
• KT-20233 Kapt: using compiler in-process w/ gradle leads to classloader conflict
• KT-21009 Running Gradle build with clean prevents KotlinCompile tasks from loading from cache

Tools. Incremental Compile

• KT-21622 Make IC work more accurately with changes of Android layouts xml files
• KT-21699 JS IC produces different source maps when enum usage is compiled separately

Tools. J2K

• KT-21502 Inspection to convert map.put(k, v) into map[k] = v
• KT-19390 Character and string concatenation in Java is converted to code with multiple type errors in Kotlin
• KT-19943 Redundant 'toInt' after converting explicit Integer#intValue call

Tools. JPS

• KT-21574 JPS build: API version in project settings is ignored
• KT-21841 JPS throws exception creating temporary file for module

Tools. Maven

• KT-20816 Repeated Maven Compiles With Kapt Fail

Tools. kapt

Fixes

• KT-18791 Kapt: Constants from R class should not be inlined
• KT-19203 Kapt3 generator doesn't seem to print log level lower to Mandatory Warning
• KT-19402 kapt.correctErrorTypes makes typealias not work.
• KT-19505 Kapt doesn't always stub classes about to be generated.
• KT-19518 Kapt: Support 'correctErrorTypes' option in annotations
• KT-20257 Kapt is incompatible with compiler plugins
• KT-20749 Kapt: Support Java 9
• KT-21144 Kapt: Compilation error with maven plugin (Java 9 compatibility)
• KT-21205 KDoc unavailable via javax.lang.model.util.Elements#getDocComment(Element e)
• KT-21262 Kapt: Remove artificial KaptError exception on errors from annotation processor
• KT-21264 Kapt: -Xmaxerrs javac option is not propagated properly
• KT-21358 Kapt: Support import directive with aliases (correctErrorTypes)
• KT-21359 Kapt: Filter out non-package imports whenever possible (correctErrorTypes)
• KT-21425 kapt warning when assembling unit tests
• KT-21433 Annotations on enum constants are not kept on the generated stub
• KT-21483 Kapt: Loading resources doesn't work without restarting the gradle daemon
• KT-21542 Kapt: Report additional info about time spent in each annotation processor
• KT-21565 Kapt, Maven: Support passing arguments for annotation processors
• KT-21566 Kapt, Maven: Support passing Javac options
• KT-21729 Error message says "androidProcessor" should be "annotationProcessor"

Compiler

• KT-20821 Error while inlining function reference implicitly applied to this
• KT-21299 Restore adding JDK roots to the beginning of the classpath list

IDE

• KT-21180 Project level api/language version settings are erroneously used as default during Gradle import
• KT-21335 Fix exception on Project Structure view open
• KT-21610 Fix "Could not determine the class-path for interface KotlinGradleModel" on Gradle sync
• Optimize dependency handling during import of Gradle project

JavaScript

• KT-21493 Losing lambda defined in inline function after incremental recompilation

Tools. CLI

• KT-21495 Bash scripts in Kotlin v1.2 compiler have Windows line terminators
• KT-21537 javac 7 do nothing when kotlin-compiler(-embeddable) is in classpath

Libraries

• Unify docs wording of 'trim*' functions
• Improve cover documentation page of kotlin.test library
• Provide summary for kotlin.math package
• Fix unresolved references in the api docs

Previous releases

This release also includes fixes and improvements from previous release:

• v1.2.0

CHANGELOG

1.2

Android

• KT-20974 NSME "AndroidModuleModel.getMainArtifact" on Gradle refresh
• KT-20975 IAE "Missing extension point" on Gradle refresh

Compiler

• KT-6359 Provide the way to share code with different targets(JVM, JS)

IDE

• KT-21300 IDEA slow down in Kotlin + Spring project
• KT-20450 Exception in UAST during function inlining
• KT-20789 Can't navigate to inline call/inline use site when runner is delegated to Gradle
• KT-21236 New project button doesn't work with Kotlin plugin enabled and Gradle plugin disabled
• KT-21263 "Configure Kotlin Plugin Updates" suggests incompatible plugin for AS 3.0

Tools. JPS

• KT-20757 Rebuild when language/api version is changed

Previous releases

This release also includes fixes and improvements from pre-releases:

• v1.2-rc2
• v1.2-rc1
• v1.2-beta2
• v1.2-beta
• v1.2-M2
• v1.2-M1

Compiler

• KT-17640 Back-end (JVM) Internal error for inline reified suspend fun
• KT-20651 "Don't know how to generate outer expression" for enum-values with non-trivial self-closures

IDE

• KT-20782 Non-atomic trees update
• KT-20789 Can't navigate to inline call/inline use site when runner is delegated to Gradle
• KT-20843 Kotlin TypeDeclarationProvider may stop other declarations providers execution
• KT-20929 Import Project from Gradle wizard: the same page is shown twice
• KT-20967 Kotlin plugin upgrade breaks Gradle refresh
• KT-21263 "Configure Kotlin Plugin Updates" suggests incompatible plugin for AS 3.0

IDE. Inspections and Intentions

• KT-20315 "call chain on collection type may be simplified" generates code that does not compile

• Adds experimental support for Kotlin/JS incremental compilation
• Adds new features to JSR-305 custom nullability annotations support
• Brings a lot of bug fixes in the automatic Parcelable implementation generator and provides it with IDE support
• Improves Gradle incremental builds
• Introduces new inspections, performance improvements and bug fixes in the IntelliJ plugin

The complete list of changes in this release can be found in the changelog.

The update is compatible with all versions of IntelliJ IDEA from 2016.3 until 2017.3, as well as with Android Studio 2.3, 3.0 and 3.1 Canary.

Compiler

Fixes

• KT-20774 "::foo.isInitialized" for lateinit member properties produces incorrect bytecode
• KT-20826 Can't compile Ultimate Idea with Kotlin 1.2
• KT-20879 Compiler problem in when-expressions
• KT-20959 Regression: Unexpected diagnostic NINITIALIZED_ENUM_COMPANION reported in 1.1.60 & 1.2.0-rc
• KT-20651 Don't know how to generate outer expression" for enum-values with non-trivial self-closures

IDE

New Features

• KT-20286 "Configure Kotlin in project" should add kotlin-stdlib-jdk7/8 instead of kotlin-stdlib-jre7/8 starting from Kotlin 1.2

Fixes

• KT-19599 No indentation for multiline collection literal
• KT-20346 Can't build tests in common code due to missing org.jetbrains.kotlin:kotlin-test-js testCompile dependency in JS
• KT-20550 Spring: "Navigate to autowired candidates" gutter action is missed (IDEA 2017.3)
• KT-20566 Spring: "Navigate to the spring beans declaration" gutter action for @ComponentScan is missed (IDEA 2017.3)
• KT-20843 Kotlin TypeDeclarationProvider may stop other declarations providers execution
• KT-20906 Find symbol by name doesn't work
• KT-20920 UAST: SOE Thrown in JavaColorProvider
• KT-20922 Couldn't match ClsMethodImpl from Kotlin test files
• KT-20929 Import Project from Gradle wizard: the same page is shown twice
• KT-20833 MP project: add dependency to kotlin-test-annotation-common to common module

IDE. Completion

• KT-18458 Spring: code completion does not suggest bean names inside @Qualifier before function parameter

IDE. Inspections and Intentions

• KT-20899 Code Cleanup fails to convert Circlet codebase to 1.2
• KT-20949 CCE from UAST (File breadcrumbs don't update when file tree does)

IDE. Refactorings

• KT-20251 Kotlin Gradle script: Refactor → Inline works incorrect when you need to inline all function occurrences

JavaScript

• KT-2976 Suggestion for cleaner style to implement !! operator
• KT-5259 JS: RTTI may be break by overwriting constructor field
• KT-17475 JS: object and companion object named "prototype" cause exceptions
• KT-18095 JS: Wrong behavior of fun named "constructor"
• KT-18105 JS: inner class "length" cause runtime exception
• KT-20625 JS: Interface function with default parameter, overridden by other interface cannot be found at runtime
• KT-20820 JS: IDEA project doesn't generate paths relative to .map

Libraries

• KT-4900 Finalize math operation parameter names

Tools. JPS

• KT-20852 IllegalArgumentException: URI has an authority component on attempt to jps compile the gradle project with javascript module

Tools. kapt

• KT-20877 Butterknife: UninitializedPropertyAccessException: "lateinit property has not been initialized" for field annotated with @BindView.

Previous releases

This release also includes the fixes and improvements from the previous
1.2-Beta2 release.

What's new

• Bug fixes and further improvements in support for JSR-305 nullability annotations:
  • Type qualifier defaults can now be used with ElementType.TYPE_USE to provide nullability information for types in all positions including type arguments, upper bounds of type parameters and wildcard types
  • Migration status of custom nullability annotations can be controlled with the @UnderMigration annotation (packaged in a new artifact kotlin-annotations-jvm)
  • Support for fine-grained migration status control on the library user side with the compiler configuration flag -Xjsr305
• Experimental support for Kotlin/JS incremental compilation in Gradle builds; it is disabled by default and can be enabled by setting kotlin.incremental.js = true in gradle.properties or local.properties
• Bug fixes in Parcelable implementation generation with @Parcelize
• Lots of bug fixes in the compiler and IDE
• New inspections, performance improvements and bugfixes in the IntelliJ plugin
• Other improvements in support for Gradle incremental builds

Full changelog

CHANGELOG

1.2-Beta2

Multiplatform projects

New Features

• KT-20616 Compiler options for KotlinCompileCommon task
• KT-15522 Treat expect classes without explicit constructors as not having constructors at all
• KT-16099 Do not require obvious override of super-interface methods in non-abstract expect class
• KT-20618 Rename implement to expectedBy in gradle module dependency

Fixes

• KT-16926 'implement' dependency is not transitive when importing gradle project to IDEA
• KT-20634 False error about platform project implementing non-common project
• KT-19170 Forbid private expected declarations
• KT-20431 Prohibit inheritance by delegation in 'expect' classes
• KT-20540 Report errors about incompatible constructors of actual class
• KT-20398 Do not highlight declarations with not implemented implementations with red during typing
• KT-19937 Support "implement expect class" quickfix for nested classes
• KT-20657 Actual annotation with all parameters that have default values doesn't match expected annotation with no-arg constructor
• KT-20680 No actual class member: inconsistent modality check
• KT-18756 multiplatform project: compilation error on implementation of extension property in javascript client module
• KT-17374 Too many "expect declaration has no implementation" inspection in IDE in a multi-platform project
• KT-18455 Multiplatform project: show gutter Navigate to implementation on expect side of method in the expect class
• KT-19222 Useless tooltip on a gutter icon for expect declaration
• KT-20043 multiplatform: No H gutter if a class has nested/inner classes inherited from it
• KT-20164 expect/actual navigation does not work when actual is a typealias
• KT-20254 multiplatform: there is no link between expect and actual classes, if implementation has a constructor when expect doesn't
• KT-20309 multiplatform: ClassCastException on mouse hovering on the H gutter of the actual secondary constructor
• KT-20638 Context menu in common module: NSEE: "Collection contains no element matching the predicate." at KotlinRunConfigurationProducerKt.findJvmImplementationModule()
• KT-18919 multiplatform project: expect keyword is lost on converting to object
• KT-20008 multiplatform: Create expect class implementation should add actual keyword at secondary constructors
• KT-20044 multiplatform: Create expect class implementation should add actual constructor at primary constructor
• KT-20135 "Create expect class implementation" should open created class in editor
• KT-20163 multiplatform: it should be possible to create an implementation for overloaded method if for one method implementation is present already
• KT-20243 multiplatform: quick fix Create expect interface implementation should add actual keyword at interface members
• KT-20325 multiplatform: Quick fix Create actual ... should specify correct classifier name for object, enum class and annotation class

Compiler

New Features

• KT-16028 Allow to have different bodies of inline functions inlined depending on apiVersion

Performance Improvements

• KT-20462 Don't create an array copy for '*(...)'

Fixes

• KT-13644 Information from explicit cast should be used for type inference
• KT-14697 Use-site targeted annotation is not correctly loaded from class file
• KT-17981 Type parameter for catch parameter possible when exception is nested in generic, but fails in runtime
• KT-19251 Stack spilling in constructor arguments breaks Quasar
• KT-20387 Wrong argument generated for accessor call of a protected generic 'operator fun get/set' from base class with primitive type as type parameter
• KT-20491 Incorrect synthetic accessor generated for a generic base class function specialized with primitive type
• KT-20651 "Don't know how to generate outer expression" for enum-values with non-trivial self-closures
• KT-20752 Do not register new kinds of smart casts for unstable values

IDE

New Features

• KT-19146 Parameter hints could be shown for annotation

Fixes

• KT-19207 "Configure Kotlin in project" should add "requires kotlin.stdlib" to module-info for Java 9 modules
• KT-19213 Formatter/Code Style: space between type parameters and where is not inserted
• KT-19216 Parameter name hints should not be shown for functional type invocation
• KT-20448 Exception in UAST during reference search in J2K
• KT-20543 java.lang.ClassCastException on usage of array literals in Spring annotation
• KT-20709 Loop in parent structure when converting a LITERAL_STRING_TEMPLATE_ENTRY

IDE. Completion

• KT-17165 Support array literals in annotations in completion

IDE. Debugger

• KT-18775 Evaluate expression doesn't allow access to properties of private nested objects, including companion

IDE. Inspections and Intentions

New Features

• KT-20108 Support "add requires directive to module-info.java" quick fix on usages of non-required modules in Kotlin sources
• KT-20410 Add inspection for listOf().filterNotNull() to replace it with listOfNotNull()

Fixes

• KT-16636 Remove parentheses after deleting the last unused constructor parameter
• KT-18549 "Add type" quick fix adds non-primitive Array type for annotation parameters
• KT-18631 Inspection to convert emptyArray() to empty literal does not work
• KT-18773 Disable "Replace camel-case name with spaces" intention for JS and common projects
• KT-20183 AE “Classifier descriptor of a type should be of type ClassDescriptor” on adding element to generic collection in function
• KT-20315 "call chain on collection type may be simplified" generates code that does not compile

JavaScript

Fixes

• KT-8285 JS: don't generate tmp when only need one component
• KT-8374 JS: some Double values converts to Int differently on JS and JVM
• KT-14549 JS: Non-local returns from secondary constructors don't work
• KT-15294 JS: parse error in js() function
• KT-17629 JS: Equals function (==) returns true for all primitive numeric types
• KT-17760 JS: Nothing::class throws error
• KT-17933 JS: toString, hashCode method and simplename property of KClass return senseless results for some classes
• KT-18010 JS: JsName annotation in interfaces can cause runtime exception
• KT-18063 Inlining does not work properly in JS for suspend functions from another module
• KT-18548 JS: wrong string interpolation with generic or Any parameters
• KT-19772 JS: wrong boxing behavior for open val and final fun inside open class
• KT-19794 runtime crash with empty object (Javascript)
• KT-19818 JS: generate paths relative to .map file by default (unless "-source-map-prefix" is used)
• KT-19906 JS: rename compiler option "-source-map-source-roots" to avoid misleading since sourcemaps have field called "sourceRoot"
• KT-20287 Functions don't actually return Unit in Kotlin-JS -> unexpected null problems vs JDK version
• KT-20451 KotlinJs - interface function with default parameter, overridden by implementor, can't be found at runtime
• KT-20527 JS: use prototype chain to check that object implements kotlin interface
• KT-20650 JS: compiler crashes in Java 9 with NoClassDefFoundError
• KT-20653 JS: compiler crashes in Java 9 with TranslationRuntimeException

Language design

• KT-20171 Deprecate assigning single elements to varargs in named form

Libraries

• KT-19696 Provide a way to write multiplatform tests
• KT-18961 Closeable.use should call addSuppressed
• KT-2460 PR-1300 shuffle and fill extensions for MutableList now also available in JS
• PR-1230 Add assertSame and assertNotSame methods to kotlin-test

Tools. Gradle

• KT-20553 Rename warningsAsErrors compiler option to allWarningsAsErrors
• KT-20217 src/main/java and src/test/java source directories are no longer included by default in Kotlin/JS and Kotlin/Common projects

Tools. Incremental Compile

• KT-20654 AndroidStudio: NSME “PsiJavaModule.getName()Ljava/lang/String” on calling simple Kotlin functions like println(), listOf()

Binary Metadata

• KT-20547 Write pre-release flag into class files if language version > LATEST_STABLE

Previous releases

This release also includes the fixes and improvements from the previous
1.2-Beta release.

Android

New Features

• KT-20051 Quickfixes to support @parcelize

Fixes

• KT-19747 Android extensions + Parcelable: VerifyError in case of RawValue annotation on a type when it's unknown how to parcel it
• KT-19899 Parcelize: Building with ProGuard enabled
• KT-19988 [Android Extensions] inner class LayoutContainer causes NoSuchMethodError
• KT-20002 Parcelize explodes on LongArray
• KT-20019 Parcelize does not propogate flags argument when writing nested Parcelable
• KT-20020 Parcelize does not use primitive array read/write methods on Parcel
• KT-20021 Parcelize does not serialize Parcelable enum as Parcelable
• KT-20022 Parcelize should dispatch directly to java.lang.Enum when writing an enum.
• KT-20034 Application installation failed (INSTALL_FAILED_DEXOPT) in Android 4.3 devices if I use Parcelize
• KT-20057 Parcelize should use specialized write/create methods where available.
• KT-20062 Parceler should allow otherwise un-parcelable property types in enclosing class.
• KT-20170 UAST: Getting the location of a UIdentifier is tricky

Compiler

• KT-4565 Support smart casting of safe cast's subject (and also safe call's receiver)
• KT-8492 Null check should work after save call with elvis in condition
• KT-9327 Need a way to check whether a lateinit property was assigned
• KT-14138 Allow lateinit local variables
• KT-15461 Allow lateinit top level properties
• KT-7257 NPE when accessing properties of enum from inner lambda on initialization
• KT-9580 Report an error if 'setparam' target does not make sense for a parameter declaration
• KT-16310 Nested classes inside enum entries capturing outer members
• KT-20155 Confusing diagnostics on a nested interface in inner class

IDE

• KT-14175 Surround with try ... catch (... finally) doesn't work for expressions
• KT-20308 New Gradle with Kotlin DSL project wizard
• KT-18353 Support UAST for .kts files
• KT-19823 Kotlin Gradle project import into IntelliJ: import kapt generated classes into classpath
• KT-20185 Stub and PSI element type mismatch for "var nullableSuspend: (suspend (P) -> Unit)? = null"

Language design

• KT-14486 Allow smart cast in closure if a local variable is modified only before it (and not after or inside)
• KT-15667 Support "::foo" as a short-hand syntax for bound callable reference to "this::foo"
• KT-16681 kotlin allows mutating the field of read-only property

Libraries

• KT-19258 Java 9: module-info.java with requires kotlin.stdlib causes compiler to fail: "module reads package from both kotlin.reflect and kotlin.stdlib"

Tools

• KT-19692 kotlin-jpa plugin doesn't support @mappedsuperclass annotation
• KT-20030 Parcelize can directly reference writeToParcel and CREATOR for final, non-Parcelize Parcelable types in same compilation unit.
• KT-19742 [Android extensions] Calling clearFindViewByIdCache causes NPE
• KT-19749 Android extensions + Parcelable: NoSuchMethodError on attempt to pack into parcel a serializable object
• KT-20026 Parcelize overrides describeContents despite being already implemented.
• KT-20027 Parcelize uses wrong classloader when reading parcelable type.
• KT-20029 Parcelize should not directly reference parcel methods on types outside compilation unit
• KT-20032 Parcelize does not respect type nullability in case of Parcelize parcelables

Tools. CLI

• KT-10563 Support a command line argument -Werror to treat warnings as errors

Tools. Gradle

• KT-20212 Cannot access internal components from test code

Tools. kapt

• KT-17923 Reference to Dagger generated class is highlighted red
• KT-18923 Kapt: Do not use the Kotlin error message collector to issue errors from kapt
• KT-19097 Request: Decent support of kapt.kotlin.generated on Intellij/Android Studio
• KT-20001 kapt generate stubs Gradle task does not depend on the compilation of sub-project kapt dependencies

Android

• KT-14800 Kotlin Lint: @SuppressLint annotation on local variable is ignored
• KT-16600 False positive "For methods, permission annotation should specify one of value, anyOf or allOf"
• KT-16834 Android Lint: Bogus warning on @setparam:StringRes
• KT-17785 Kotlin Lint: "Incorrect support annotation usage" does not pick the value of const val
• KT-18837 Android Lint: Collection.removeIf is not flagged when used on RealmList
• KT-18893 Android support annotations (ColorInt, etc) cannot be used on properties: "does not apply for type void"
• KT-18997 KLint: False positive "Could not find property setter method setLevel on java.lang.Object" if using elvis with return on RHS
• KT-19671 UAST: Parameter annotations not provided for val parameters

Compiler

Performance Improvements

• KT-17963 Unnecessary boxing in case of primitive comparison to object
• KT-18589 'Equality check can be used instead of elvis' produces code that causes boxing
• KT-18693 Optimize in-expression with optimizable range in RHS
• KT-18721 Improve code generation for if-in-primitive-literal expression ('if (expr in low .. high)')
• KT-18818 Optimize null cases in when statement to avoid Intrinsics usage
• KT-18834 Do not create ranges for 'x in low..high' where type of x doesn't match range element type
• KT-19029 Use specialized equality implementations for 'when'
• KT-19149 Use 'for-in-until' loop in intrinsic array constructors
• KT-19252 Use 'for-in-until' loop for 'for-in-rangeTo' loops with constant upper bounds when possible
• KT-19256 Destructuring assignment generates redundant code for temporary variable nullification
• KT-19457 Extremely slow analysis for file with deeply nested lambdas

Fixes

• KT-10754 Bogus unresolved extension function
• KT-11739 Incorrect error message on getValue operator with KProperty parameter
• KT-11834 INAPPLICABLE_LATEINIT_MODIFIER is confusing for a generic type parameter with nullable (default) upper bound
• KT-11963 Exception: recursive call in a lazy value under LockBasedStorageManager
• KT-12737 Confusing error message when calling extension function with an implicit receiver, passing value parameter of wrong type
• KT-12767 Too much unnecessary information in "N type arguments expected" error message
• KT-12796 IllegalArgumentException on referencing inner class constructor on an outer class instance
• KT-12899 Platform null escapes if passed as an extension receiver to an inline function
• KT-13665 Generic componentN() functions should provide better diagnostics when type cannot be inferred
• KT-16223 Confusing diagnostic for local inline functions
• KT-16246 CompilationException caused by intersection type overload and wrong type parameter
• KT-16746 DslMarker doesn't work with typealiases
• KT-17444 Accessors generated for private file functions should respect @jvmname
• KT-17464 Calling super constructor with generic function call in arguments fails at runtime
• KT-17725 java.lang.VerifyError when both dispatch receiver and extension receiver have smart casts
• KT-17745 Unfriendly error message on creating an instance of interface via typealias
• KT-17748 Equality for class literals of primitive types is not preserved by reification
• KT-17879 Comparing T::class from a reified generic with a Class<> and KClass<> variable in when statement is broken
• KT-18356 Argument reordering in super class constructor call for anonymous object fails with VerifyError
• KT-18819 JVM BE treats 'if (a in low .. high)' as 'if (a >= low && a <= high)', so 'high' can be non-evaluated
• KT-18855 Convert "Remove at from annotation argument" inspection into compiler error & quick-fix
• KT-18858 Exception within typealias expansion with dynamic used as one of type arguments
• KT-18902 NullPointerException when using provideDelegate with properties of the base class at runtime
• KT-18940 REPEATED_ANNOTATION is reported on wrong location for typealias arguments
• KT-18944 Type annotations are lost for dynamic type
• KT-18966 Report full package FQ name in compilation errors related to visibility
• KT-18971 Missing non-null assertion for platform type passed as a receiver to the member extension function
• KT-18982 NoSuchFieldError on access to imported object property from the declaring object itself
• KT-18985 Too large highlighting range for UNCHECKED_CAST
• KT-19058 VerifyError: no CHECKAST on dispatch receiver of the synthetic property defined in Java interface
• KT-19100 VerifyError: missing CHECKCAST on extension receiver of the extension property
• KT-19115 Report warnings on usages of JSR 305-annotated declarations which rely on incorrect or missing nullability information
• KT-19128 java.lang.VerifyError with smart cast to String from Any
• KT-19180 Bad SAM conversion of Java interface causing ClassCastException: [...] cannot be cast to kotlin.jvm.functions.Function1
• KT-19205 Poor diagnostic message for deprecated class referenced through typealias
• KT-19367 NSFE if property with name matching companion object property name is referenced within lambda
• KT-19434 Object inheriting generic class with a reified type parameter looses method annotations
• KT-19475 AnalyserException in case of combination of while (true) + stack-spilling (coroutines/try-catch expressions)
• KT-19528 Compiler exception on inline suspend function inside a generic class
• KT-19575 Deprecated typealias is not marked as such in access to companion object
• KT-19601 UPPER_BOUND_VIOLATED reported on type alias expansion in a recursive upper bound on a type parameter
• KT-19814 Runtime annotations for open suspend function are not generated correctly
• KT-19892 Overriding remove method on inheritance from TreeSet
• KT-19910 Nullability assertions removed when inlining an anonymous object in crossinline lambda
• KT-19985 JSR 305: nullability qualifier of Java function return type detected incorrectly in case of using annotation nickname

IDE

New Features

• KT-6676 Show enum constant ordinal in quick doc like in Java
• KT-12246 Kotlin source files are not highlighted in Gradle build output in IntelliJ

Performance Improvements

• KT-19670 When computing argument hints, don't resolve call if none of the arguments are unclear expressions

Fixes

• KT-9288 Call hierarchy ends on function call inside local val initializer expression
• KT-9669 Join Lines should add semicolon when joining statements into the same line
• KT-14346 IllegalArgumentException on attempt to call Show Hierarchy view on lambda
• KT-14428 AssertionError in KotlinCallerMethodsTreeStructure. on attempt to call Hierarchy view
• KT-19466 Kotlin based Gradle build not recognized when added as a module
• KT-18083 IDEA: Support extension main function
• KT-18863 Formatter should add space after opening brace in a single-line enum declaration
• KT-19024 build.gradle.kts is not supported as project
• KT-19124 Creating source file with directory/package throws AE: "Write access is allowed inside write-action only" at NewKotlinFileAction$Companion.findOrCreateTarget()
• KT-19154 Completion and auto-import does not suggest companion object members when inside an extension function
• KT-19202 Applying 'ReplaceWith' fix in type alias can change program behaviour
• KT-19209 "Stub and PSI element type mismatch" in when receiver type is annotated with @receiver
• KT-19277 Optimize imports on the fly should not work in test data files
• KT-19278 Optimize imports on the fly should not remove incomplete import while it's being typed
• KT-19322 Script editor: Move Statement Down/Up can't move one out of top level lambda
• KT-19451 "Unresolved reference" with Kotlin Android Extensions when layout defines the Android namespace as something other than "android"
• KT-19492 Java 9: references from unnamed module to not exported classes of named module are compiled, but red in the editor
• KT-19493 Java 9: references from named module to classes of unnamed module are not compiled, but green in the editor
• KT-19843 Performance warning: LineMarker is supposed to be registered for leaf elements only
• KT-19889 KotlinGradleModel : Unsupported major.minor version 52.0
• KT-19885 200% CPU for some time on Kotlin sources (PackagePartClassUtils.hasTopLevelCallables())
• KT-19901 KotlinLanguageInjector#getLanguagesToInject can cancel any progress in which it was invoked
• KT-19903 Copy Reference works incorrectly for const val
• KT-20153 Kotlin facet: Java 9 -Xadd-modules setting produces more and more identical sub-elements of <additionalJavaModules> in .iml file

IDE. Completion

• KT-8848 Code completion does not support import aliases
• KT-18040 There is no auto-popup competion after typing "$x." anymore
• KT-19015 Smart completion: parameter list completion is not available when some of parameters are already written

IDE. Debugger

• KT-19429 Breakpoint appears in random place during debug

IDE. Inspections and Intentions

New Features

• KT-4748 Remove double negation for boolean expressions intention + inspection
• KT-5878 Quickfix for "variable initializer is redundant" (VARIABLE_WITH_REDUNDANT_INITIALIZER)
• KT-11991 Kotlin should have an inspection to suggest the simplified format for a no argument lambda
• KT-12195 Quickfix @jvmstatic on main() method in an object
• KT-12233 "Package naming convention" inspection could show warning in .kt sources
• KT-12504 Intention to make open class with only private constructors sealed
• KT-12523 Quick-fix to remove when with only else
• KT-12613 "Make abstract" on member of open or final class should make abstract both member and class
• KT-16033 Automatically static import the enum value name when "Add remaining branches" on an enum from another class/file
• KT-16404 Create from usage should allow generating nested classes
• KT-17322 Intentions to generate a getter and a setter for a property
• KT-17888 Inspection to warn about suspicious combination of == and ===
• KT-18826 INAPPLICABLE_LATEINIT_MODIFIER should have a quickfix to remove initializer
• KT-18965 Add quick-fix for USELESS_IS_CHECK
• KT-19126 Add quickfix for 'Property initializes are not allowed in interfaces'
• KT-19282 Support "flip equals" intention for String.equals extension from stdlib
• KT-19428 Add inspection for redundant overrides that only call the super method
• KT-19514 Redundant getter / setter inspection

Fixes

• KT-13985 "Add remaining branches" action does not use back-ticks correctly
• KT-15422 Reduce irrelevant reporting of Destructure inspection
• KT-17480 Create from usage in expression body of override function should take base type into account
• KT-18482 "Move lambda argument to parenthesis" action generate uncompilable code
• KT-18665 "Use destructuring declaration" must not be suggested for invisible properties
• KT-18666 "Use destructuring declaration" should not be reported on a variable used in destructuring declaration only
• KT-18978 Intention Move to class body generates incorrect code for vararg val/var
• KT-19006 Inspection message "Equality check can be used instead of elvis" is slightly confusing
• KT-19011 Unnecessary import for companion object property with extension function type is automatically inserted
• KT-19299 Quickfix to correct overriding function signature keeps java NotNull annotations
• KT-19614 Quickfix for INVISIBLE_MEMBER doesn't offer to make member protected if referenced from subclass
• KT-19666 ClassCastException in IfThenToElvisIntention
• KT-19704 Don't remove braces in redundant cascade if
• KT-19811 Internal member incorrectly highlighted as unused
• KT-19926 Naming convention inspections: pattern is validated while edited, PSE at Pattern.error()
• KT-19927 "Package naming convention" inspection checks FQN, but default pattern looks like for simple name

IDE. Refactorings

• KT-17266 Refactor / Inline Function: reference to member of class containing extension function is inlined wrong
• KT-17776 Inline method of inner class adds 'this' for methods from enclosing class
• KT-19161 Safe delete conflicts are shown incorrectly for local declarations

JavaScript

Performance Improvements

• KT-18329 JS: for loop implementation depends on parentheses

Fixes

• KT-12970 Empty block expression result is 'undefined' (expected: 'kotlin.Unit')
• KT-13930 Safe call for a function returning 'Unit' result is 'undefined' or 'null' (instead of 'kotlin.Unit' or 'null')
• KT-13932 'kotlin.Unit' is not materialized in some functions returning supertype of 'Unit' ('undefined' returned instead)
• KT-16408 JS: Inliner loses imported values when extending a class from another module
• KT-17014 Different results in JVM and JavaScript on Unit-returning functions
• KT-17915 JS: 'kotlin.Unit' is not materialized as result of try-catch block expression with empty catch
• KT-18166 JS: Delegated property named with non-identifier symbols can crash in runtime.
• KT-18176 JS: dynamic type should not allow methods and properties with incorrect identifier symbols
• KT-18216 JS: Unit-returning expression used in loop can cause wrong behavior
• KT-18793 Kotlin Javascript compiler null handling generates if-else block where else is always taken
• KT-19108 JS: Inconsistent behaviour from JVM code when modifying variable whilst calling run on it
• KT-19495 JS: Wrong compilation of nested conditions with if- and when-clauses
• KT-19540 JS: prohibit to use illegal symbols on call site
• KT-19542 JS: delegate field should have unique name otherwise it can be accidentally overwritten
• KT-19712 KotlinJS - providing default value of lambda-argument produces invalid js-code
• KT-19793 build-crash with external varargs (Javascript)
• KT-19821 JS remap sourcemaps in DCE
• KT-19891 Runtime crash with inline function with reified type parameter and object expression: "T_0 is not defined" (JavaScript)
• KT-20005 Invalid source map with option sourceMapEmbedSources = "always"

Libraries

• KT-19133 Specialize any and none for Collection
• KT-18267 Deprecate CharSequence.size extension function on the JS side
• KT-18992 JS: Missing MutableMap.iterator()
• KT-19881 Expand doc comment of @publishedapi

Tools. CLI

• KT-18859 Strange error message when kotlin-embeddable-compiler is run without explicit -kotlin-home
• KT-19287 Common module compilation: K2MetadataCompiler ignores coroutines state

Tools. Gradle

• KT-17150 Support 'packagePrefix' option in Gradle plugin
• KT-19956 Support incremental compilation to JS in Gradle
• KT-13918 Cannot access internal classes/methods in androidTest source set in an Android library module
• KT-17355 Use archivesBaseName instead of project.name for module names, get rid of _main for main source set
• KT-18183 Kotlin gradle plugin uses compile task output as "friends directory"
• KT-19248 Documentation suggested way to enable coroutines (gradle) doesn't work
• KT-19397 local.properties file not closed by KotlinProperties.kt

Tools. Incremental Compile

• KT-19580 IC does not detect non-nested sealed class addition

Tools. J2K

• KT-10375 0xFFFFFFFFFFFFFFFFL conversion issue
• KT-13552 switch-to-when conversion creates broken code
• KT-17379 Converting multiline expressions creates dangling operations
• KT-18232 Kotlin code converter misses annotations
• KT-18786 Convert Kotlin to Java generates error: Variable cannot be initialized before declaration
• KT-19523 J2K produce invalid code when convert some numbers

Tools. JPS

• KT-17397 Kotlin JPS Builder can mark dirty files already compiled in round
• KT-19176 Java 9: JPS build fails for Kotlin source referring exported Kotlin class from another module: "unresolved supertypes: kotlin.Any"
• KT-19833 Cannot access class/superclass from SDK on compilation of JDK 9 module together with non-9 module

Tools. REPL

• KT-11369 REPL: Ctrl-C should interrupt the input, Ctrl-D should quit

Tools. kapt

• KT-19996 Error with 'kotlin-kapt' plugin and dagger2, clean project required

Previous releases

This release also includes the fixes and improvements from the previous
1.1.4 release.

• KT-18062 SamWithReceiver compiler plugin not used by IntelliJ for .kt files
• KT-18497 Gradle Kotlin Plugin does not work with the gradle java-library plugin
• KT-19276 Console spam when opening idea-community project in debug IDEA
• KT-19433 [Coroutines + Kapt3] Assertion failed in ClassClsStubBuilder.createNestedClassStub
• KT-19680 kapt3 & Parcelize: Compilation error
• KT-19687 Kotlin 1.1.4 noarg plugin breaks with sealed classes
• KT-19700 Kapt error after updating to 1.1.4 - stub adds type parameters where there are none
• KT-19713 Mocking of final named suspend methods with mockito fails
• KT-19729 kapt3: not always including argument to @javax.inject.Named in generated stubs
• KT-19759 "Convert to expression body" is not shown in 162 / AS23 branches for multi-liners
• KT-19767 NPE caused by Map<String, Boolean>?.get
• KT-19769 PerModulePackageCacheService calls getOrderEntriesForFile() for every file, even those that can't affect Kotlin resolve
• KT-19774 Provide an opt-out flag for separate classes directories (Gradle 4.0+)
• KT-19847 if an imported library already exists it should be redetected during gradle import

• KT-19679 CompilationException: Couldn't inline method call 'methodName' into...
• KT-19690 Lazy field in interface default method leads to ClassFormatError
• KT-19716 Quickdoc Ctrl+Q broken while browsing code completion list Ctrl-Space
• KT-19717 Library kind incorrectly detected for vertx-web in Kotlin project
• KT-19723 "Insufficient maximum stack size" during compilation

Android

New Features

• KT-11048 Android Extensions: cannot evaluate expression containing generated properties

Performance Improvements

• KT-10542 Android Extensions: No cache for Views
• KT-18250 Android Extensions: Allow to use SparseArray as a View cache

Fixes

• KT-11051 Android Extensions: completion of generated properties is unclear for ambiguous ids
• KT-14086 Android-extensions not generated using flavors dimension
• KT-14912 Lint: "Code contains STOPSHIP marker" ignores suppress annotation
• KT-15164 Kotlin Lint: problems in delegate expression are not reported
• KT-16934 Android Extensions fails to compile when importing synthetic properties for layouts in other modules
• KT-17641 Problem with Kotlin Android Extensions and Gradle syntax
• KT-17783 Kotlin Lint: quick fixes to add inapplicable @requiresapi and @suppresslint make code incompilable
• KT-17786 Kotlin Lint: "Surround with if()" quick fix is not suggested for single expression get()
• KT-17787 Kotlin Lint: "Add @targetapi" quick fix is not suggested for top level property accessor
• KT-17788 Kotlin Lint: "Surround with if()" quick fix corrupts code in case of destructuring declaration
• KT-17890 [kotlin-android-extensions] Renaming layout file does not rename import
• KT-18012 Kotlin Android Extensions generates @NotNull properties for views present in a configuration and potentially missing in another
• KT-18545 Accessing to synthetic properties on smart casted Android components crashed compiler

Compiler

New Features

• KT-10942 Support meta-annotations from JSR 305 for nullability qualifiers
• KT-14187 Redundant "is" check is not detected
• KT-16603 Support inline suspend function
• KT-17585 Generate state machine for named functions in their bodies

Performance Improvements

• KT-3098 Generate efficient comparisons
• KT-6247 Optimization for 'in' and '..'
• KT-7571 Don't box Double instance to call hashCode on Java 8
• KT-9900 Optimize range operations for 'until' extension from stdlib
• KT-11959 Unnceessary boxing/unboxing due to Comparable.compareTo
• KT-12158 Optimize away boxing when comparing nullable primitive type value to primitive value
• KT-13682 Reuse StringBuilder for concatenation and string interpolation
• KT-14323 IntelliJ lockup when using Apache Spark UDF
• KT-14375 Kotlin compiler failure with spark when creating a flexible type for scala.Function22
• KT-15235 Escaped characters in template strings are generating inefficient implementations
• KT-17280 Inline constant expressions in string templates
• KT-17903 Generate 'for-in-indices' as a precondition loop
• KT-18157 Optimize out trivial INSTANCEOF checks
• KT-18162 Do not check nullability assertions twice for effectively same value
• KT-18164 Do not check nullability for values that have been already checked with !!
• KT-18478 Unnecessary nullification of bound variables
• KT-18558 Flatten nested string concatenation
• KT-18777 Unnecessary boolean negation generated for 'if (expr !in range)'

Fixes

• KT-1809 Confusing diagnostics when wrong number of type arguments are specified and there are several callee candiates
• KT-2007 Improve diagnostics when + in not resolved on a pair of nullable ints
• KT-5066 Bad diagnostic message for ABSTRACT_MEMBER_NOT_IMPLEMENTED for (companion) object
• KT-5511 Inconsistent handling of inner enum
• KT-7773 Disallow to explicitly extend Enum class
• KT-7975 Unclear error message when redundant type arguments supplied
• KT-8340 vararg in a property setter must be an error
• KT-8612 Incorrect error message for var extension property without getter or setter
• KT-8829 Type parameter of a class is not resolved in the constructor parameter's default value
• KT-8845 Bogus diagnostic on infix operation "in"
• KT-9282 Improve diagnostic on overload resolution ambiguity when a nullable argument is passed to non-null parameter
• KT-10045 Not specific enough compiler error message in case of trying to call overloaded private methods
• KT-10164 Incorrect error message for external inline method
• KT-10248 Smart casts: Misleading error on overloaded function call
• KT-10657 Confusing diagnostic when trying to invoke value as a function
• KT-10839 Weird diagnostics on callable reference of unresolved class
• KT-11119 Confusing error message when overloaded method is called on nullable receiver
• KT-12408 Generic information lost for override values
• KT-12551 Report "unused expression" on unused bound double colon expressions
• KT-13749 Error highlighting range for no 'override' modifier is bigger than needed
• KT-14598 Do not report "member is final and cannot be overridden" when overriding something from final class
• KT-14633 "If must have both main and else branches" diagnostic range is too high
• KT-14647 Confusing error message "'@receiver:' annotations could be applied only to extension function or extension property declarations"
• KT-14927 TCE in QualifiedExpressionResolver
• KT-15243 Report deprecation on usages of type alias expanded to a deprecated class
• KT-15804 Prohibit having duplicate parameter names in functional types
• KT-15810 destructuring declarations don't work in scripts on the top level
• KT-15931 IllegalStateException: ClassDescriptor of superType should not be null: T by a
• KT-16016 Compiler failure with NO_EXPECTED_TYPE
• KT-16448 Inline suspend functions with inlined suspend invocations are miscompiled (VerifyError, ClassNotFound)
• KT-16576 Wrong code generated with skynet benchmark
• KT-17007 Kotlin is not optimizing away unreachable code based on const vals
• KT-17188 Do not propose to specify constructor invocation for classes without an accessible constructor
• KT-17611 Unnecessary "Name shadowed" warning on parameter of local function or local class member
• KT-17692 NPE in compiler when calling KClass.java on function result of type Unit
• KT-17820 False "useless cast" when target type is flexible
• KT-17972 Anonymous class generated from lambda captures its outer and tries to set nonexistent this$0 field.
• KT-18029 typealias not working in .kts files
• KT-18085 Compilation Error:Kotlin: [Internal Error] kotlin.TypeCastException: null cannot be cast to non-null type com.intellij.psi.PsiElement
• KT-18115 Generic inherited classes in different packages with coroutine causes java.lang.VerifyError: Bad local variable type
• KT-18189 Incorrect generic signature generated for implementation methods overriding special built-ins
• KT-18234 Top-level variables in script aren't local variables
• KT-18413 Strange compiler error - probably incremental compiler
• KT-18486 Superfluos generation of suspend function state-machine because of inner suspension of different coroutine
• KT-18598 Report error on access to declarations from non-exported packages and from inaccessible modules on Java 9
• KT-18698 java.lang.IllegalStateException: resolveToInstruction: incorrect index -1 for label L12 in subroutine
• KT-18702 Proguard warning with Kotlin 1.2-M1
• KT-18728 Integer method reference application fails with CompilationException: Back-end (JVM) Internal error
• KT-18845 Exception on building gradle project with collection literals
• KT-18867 Getting constant "VerifyError: Operand stack underflow" from Kotlin plugin
• KT-18916 Strange bytecode generated for 'null' passed as SAM adapter for Java interface
• KT-18983 Coroutines: miscompiled suspend for loop (local variables are not spilled around suspension points)
• KT-19175 Compiler generates different bytecode when classes are compiled separately or together
• KT-19246 Using generic inline function inside inline extension function throws java.lang.VerifyError: Bad return type
• KT-19419 Support JSR 305 meta-annotations in libraries even when JSR 305 JAR is not on the classpath

IDE

New Features

• KT-2638 Inline property (with accessors) refactoring
• KT-7107 Rename refactoring for labels
• KT-9818 Code style for method expression bodies
• KT-11994 Data flow analysis support for Kotlin in IntelliJ
• KT-14126 Code style wrapping options for enum constants
• KT-14929 Deprecated ReplaceWith for type aliases
• KT-14950 Code Style: Wrapping and Braces / "Local variable annotations" setting could be supported
• KT-14965 "Configure Kotlin in project" should support build.gradle.kts
• KT-15504 Add code style options to limit number of blank lines
• KT-16558 Code Style: Add Options for "Spaces Before Parentheses"
• KT-18113 Add new line options to code style for method parameters
• KT-18605 Option to not use continuation indent in chained calls
• KT-18607 Options to put blank lines between 'when' branches

Performance Improvements

• KT-14606 Code completion calculates decompiled text when building lookup elements for PSI from compiled classes
• KT-17751 Kotlin slows down java inspections big time
• KT-17835 10s hang on IDEA project open
• KT-18842 Very slow typing in certain files of Kotlin project
• KT-18921 Configure library kind explicitly

Fixes

• KT-6610 Language injection doesn't work with String Interpolation
• KT-8893 Quick documentation shows type for top-level object-type elements, but "no name provided" for local ones
• KT-9359 "Accidental override" error message does not mention class (type) names
• KT-10736 Highlighting usages doesn't work for synthetic properties created by the Android Extensions
• KT-11980 Spring: Generate Constructor, Setter Dependency in XML for Kotlin class: IOE at LightElement.add()
• KT-12123 Formatter: always indent after newline in variable initialization
• KT-12910 spring: create init-method/destroy-method from usage results in IOE
• KT-13072 Kotlin struggles to index JDK 9 classes
• KT-13099 formatting in angle brackets ignored and not fixed
• KT-14083 Formatting of where clasuses
• KT-14271 Value captured in closure doesn't always get highlighted
• KT-14561 Use regular indent for the primary constructor parameters
• KT-14974 "Find Usages" hangs in ExpressionsOfTypeProcessor
• KT-15093 Navigation to library may not work if there's another module in same project that references same jar via a different library
• KT-15270 Quickfix to migrate from @Native***
• KT-16352 Create from usage inserts extra space in first step
• KT-16725 Formatter does not fix spaces before square brackets
• KT-16999 "Parameter info" shows duplicates on toString
• KT-17357 BuiltIns for module build with project LV settings, not with facet module settings
• KT-17394 Core formatting is wrong for expression body properties
• KT-17759 Breakpoints not working in JS
• KT-17771 Kotlin IntelliJ plugin should resolve Gradle script classpath asynchronously
• KT-17818 Formatting of long constructors is inconsistent with Kotlin code conventions
• KT-17849 Automatically insert trimMargin() or trimIndent() on enter in multi-line strings
• KT-17855 Main function is shown as unused
• KT-17894 String trimIndent support inserts wrong indent in some cases
• KT-17942 Enter in multiline string with injection doesn't add a proper indent
• KT-17956 Type hints for properties that only consist of constructor calls don't add much value
• KT-18006 Copying part of string literal with escape sequences converts this sequences to special characters
• KT-18030 Parameters hints: kotlin.arrayOf(elements) should be on the blacklist by default
• KT-18059 Kotlin Lint: False positive error "requires api level 24" for interface method with body
• KT-18149 PIEAE "Element class CompositeElement of type REFERENCE_EXPRESSION (class KtNameReferenceExpressionElementType)" at PsiInvalidElementAccessException.createByNode()
• KT-18151 Do not import jdkHome from Gradle/Maven model
• KT-18158 Expand selection should select the comment after expression getter on the same line
• KT-18186 Create function from usage should infer expected return type
• KT-18221 AE at org.jetbrains.kotlin.analyzer.ResolverForProjectImpl.descriptorForModule
• KT-18269 Find Usages fails to find operator-style usages of invoke() defined as extension
• KT-18298 spring: strange menu at "Navige to the spring bean" gutter
• KT-18309 Join lines breaks code
• KT-18373 Facet: can't change target platform between JVM versions
• KT-18376 Maven import fails with NPE at ArgumentUtils.convertArgumentsToStringList() if jvmTarget setting is absent
• KT-18418 Generate equals and hashCode should be available for classes without properties
• KT-18429 Android strings resources folding false positives
• KT-18444 Type hints don't work for destructuring declarations
• KT-18475 Gradle/IntelliJ sync can result in IntelliJ modules getting gradle artifacts added to the classpath, breaking compilation
• KT-18479 Can't find usages of invoke operator with vararg parameter
• KT-18501 Quick Documentation doesn't show when @Supress("unused") is above the javadoc
• KT-18566 Long find usages for operators when there are several operators for the same type
• KT-18596 "Generate hashCode" produces poorly formatted code
• KT-18725 Android: kotlin-language facet disappears on reopening the project
• KT-18974 Type hints shouldn't appear for negative literals
• KT-19054 Lags in typing in string literal
• KT-19062 Member navigation doesn't work in expression bodies of getters with inferred property type
• KT-19210 Command line flags like -Xload-jsr305-annotations have no effect in IDE
• KT-19303 Project language version settings are used to analyze libraries, disabling module-specific analysis flags like -Xjsr305-annotations

IDE. Completion

• KT-8208 Support static member completion with not-imported-yet classes
• KT-12104 Smart completion does not work with "invoke" when receiver is expression
• KT-17074 Incorrect autocomplete suggestions for contexts affected by @dslmarker
• KT-18443 IntelliJ not handling default constructor argument from companion object well
• KT-19191 Disable completion binding context caching by default

IDE. Debugger

• KT-14845 Evaluate expression freezes debugger while evaluating filter, for time proportional to number of elements in collection.
• KT-17120 Evaluate expression: cannot find local variable
• KT-18453 Support 'Step over' and 'Force step over' action for suspended calls
• KT-18577 Debug: Smart Step Into does not enter functions passed as variable or parameter: "Method invoke() has not been called"
• KT-18632 Debug: Smart Step Into does not enter functions passed as variable or parameter when signature of lambda and parameter doesn't match
• KT-18949 Can't stop on breakpoint after call to inline in Android Studio
• KT-19403 30s complete hangs of application on breakpoints stop attempt

IDE. Inspections and Intentions

New Features

• KT-12119 Intention to replace .addAll() on a mutable collection with +=
• KT-13436 Replace 'when' with return: handle case when all branches jump out (return Nothing)
• KT-13458 Cascade "replace with return" for if/when expressions
• KT-13676 Add better quickfix for 'let' and 'error 'only not null or asserted calls are allowed'
• KT-14648 Add quickfix for @receiver annotation being applied to extension member instead of extension type
• KT-14799 Add inspection to simplify successive null checks into safe-call and null check
• KT-14900 "Lift return out of when/if" should work with control flow expressions
• KT-15257 JS: quickfix to migrate from @Native to external
• KT-15368 Add intention to convert Boolean? == true to ?: false and vice versa
• KT-15893 "Array property in data class" inspection could have a quick fix to generate equals() and hashcode()
• KT-15958 Inspection to inline "unnecessary" variables
• KT-16063 Inspection to suggest converting block body to expression body
• KT-17198 Inspection to replace filter calls followed by functions with a predicate variant
• KT-17580 Add remaning branches intention should be available for sealed classes
• KT-17583 Support "Declaration access can be weaker" inspection for kotlin properties
• KT-17815 Quick-fix "Replace with safe call & elvis"
• KT-17842 Add quick-fix for NO_CONSTRUCTOR error
• KT-17895 Inspection to replace 'a .. b-1' with 'a until b'
• KT-17919 Add "Simplify if" intention/inspection
• KT-17920 Add intention/inspection removing redundant spread operator for arrayOf call
• KT-17970 Intention actions to format parameter/argument list placing each on separate line
• KT-18236 Add inspection for potentially wrongly placed unary operators
• KT-18274 Add inspection to replace map+joinTo with joinTo(transform)
• KT-18386 Inspection to detect safe calls of orEmpty()
• KT-18438 Add inspection for empty ranges with start > endInclusive
• KT-18460 Add intentions to apply De Morgan's laws to conditions
• KT-18516 Add inspection to detect & remove redundant Unit
• KT-18517 Provide "Remove explicit type" inspection for some obvious cases
• KT-18534 Quick-fix to add empty brackets after primary constructor
• KT-18540 Add quickfix to create data class property from usage in destructuring declaration
• KT-18615 Inspection to replace if with three or more options with when
• KT-18749 Inspection for useless operations on collection with not-null elements
• KT-18830 "Lift return out of try"

Fixes

• KT-11906 Spring: "Create getter / setter" quick fixes cause IOE at LightElement.add()
• KT-12524 Wrong "redundant semicolon" for semicolon inside an enum class before the companion object declaration
• KT-13870 Wrong caption "Change to property access" for Quick Fix to convert class instantiation to object reference
• KT-13886 Unused variable intention should remove constant initializer
• KT-14092 "Make " intention inserts modifier between annotation and class keywords
• KT-14093 "Make " intention available only on modifier when declaration already have a visibility modifier
• KT-14643 "Add non-null asserted call" quickfix should not be offered on literal null constants
• KT-15242 Create type from usage should include constraints into base types
• KT-16046 Globally unused typealias is not marked as such
• KT-16069 "Simplify if statement" doesn't work in specific case
• KT-17026 "Replace explicit parameter" should not be shown on destructuring declaration
• KT-17092 Create function from usage works incorrectly with ::class expression
• KT-17353 "Create type parameter from usage" should not be offered for unresolved annotations
• KT-17537 Create from Usage should suggest Boolean return type if function is used in if condition
• KT-17623 "Remove explicit type arguments" is too conservative sometimes
• KT-17651 Create property from usage should make lateinit var
• KT-17726 Nullability quick-fixes operate incorrectly with implicit nullable receiver
• KT-17740 CME at MakeOverriddenMemberOpenFix.getText()
• KT-18506 Inspection on final Kotlin spring components is false positive
• KT-17823 Intention "Make private" and friends should respect modifier order
• KT-17917 Superfluos suggestion to add replaceWith for DeprecationLevel.HIDDEN
• KT-17954 Setting error severity on "Kotlin | Function or property has platform type" does not show up as error in IDE
• KT-17996 Android Studio Default Constructor Command Removes Custom Setter
• KT-18033 Do not suggest to cast expression to non-nullable type when it's the same as !!
• KT-18035 Quickfix for "CanBePrimaryConstructorProperty" does not work correctly with vararg constructor properties
• KT-18044 "Move to class body" intention: better placement in the body
• KT-18074 Suggestion in Intention 'Specify return type explicitly' doesn't support generic type parameter
• KT-18120 Recursive property accessor gives false positives
• KT-18148 Incorrect, not working quickfix - final and can't be overridden
• KT-18160 Circular autofix actions between redundant modality and non-final variable with allopen plugin
• KT-18194 "Protected in final" inspection works incorrectly with all-open
• KT-18195 "Redundant modality" is not reported with all-open
• KT-18197 Redundant "make open" for abstract class member with all-open
• KT-18253 Wrong location of "Redundant 'toString()' call in string template" quickfix
• KT-18347 Nullability quickfixes are not helpful when using invoke operator
• KT-18368 "Cast expression x to Type" fails for expression inside argument list
• KT-18375 Backticked function name is suggested to be renamed to the same name
• KT-18385 Spring: Generate Dependency causes Throwable "AWT events are not allowed inside write action"
• KT-18407 "Move property to constructor" action should not appear on properties declared in interfaces
• KT-18425 Make intention inserts modifier at wrong position for sealed class
• KT-18529 Add '!!' quick fix applies to wrong expression on operation 'in'
• KT-18642 Remove unused parameter intention transfers default value to another parameter
• KT-18683 Wrong 'equals' is generated for Kotlin JS project
• KT-18709 "Lift assignment out of if" changes semantics
• KT-18711 "Lift return out of when" changes semantics for functional type
• KT-18717 Report MemberVisibilityCanBePrivate on visibility modifier if present
• KT-18722 Correct "before" sample in description for intention Convert to enum class
• KT-18723 Correct "after" sample for intention Convert to apply
• KT-18852 "Lift return out of when" does not work for exhaustive when without else
• KT-18928 In IDE, "Replace 'if' expression with safe access expression incorrectly replace expression when using property
• KT-18954 Kotlin plugin updater activates in headless mode
• KT-18970 Do not report "property can be private" on JvmField properties
• KT-19232 Replace Math.min with coerceAtMost intention is broken
• KT-19272 Do not report "function can be private" on JUnit 3 test methods

IDE. Refactorings

New Features

• KT-4379 Support renaming import alias
• KT-8180 Copy Class
• KT-17547 Refactor / Move: Problems Detected / Conflicts in View: only referencing file is mentioned

Fixes

• KT-9054 Copy / pasting a Kotlin file should bring up the Copy Class dialog
• KT-13437 Change signature replaces return type with Unit when it's not requested
• KT-15859 Renaming variables or functions with backticks removes the backticks
• KT-16180 Opened decompiled editor blocks refactoring of involved element
• KT-17062 Field/property inline refactoring works incorrectly with Kotlin & Java usages
• KT-17128 Refactor / Rename in the last position of label name throws Throwable "PsiElement(IDENTIFIER) by com.intellij.refactoring.rename.inplace.MemberInplaceRenamer" at InplaceRefactoring.buildTemplateAndStart()
• KT-17489 Refactor / Inline Property: cannot inline val with the following plusAssign
• KT-17571 Refactor / Move warns about using private/internal class from Java, but this is not related to the move
• KT-17622 Refactor / Inline Function loses type arguments
• KT-18034 Copy Class refactoring replaces all usages of the class with the new one!
• KT-18076 Refactor / Rename on alias of Java class suggests to select between refactoring handlers
• KT-18096 Refactor / Rename on import alias usage of a class member element tries to rename the element itself
• KT-18098 Refactor / Copy can't generate proper import if original code uses import alias of java member
• KT-18135 Refactor: no Problems Detected for Copy/Move source using platform type to another platform's module
• KT-18200 Refactor / Copy is enabled for Java source selected with Kotlin file, but not for Java source selected with Kotlin class
• KT-18241 Refactor / Copy (and Move) fails for chain of lambdas and invoke()'s with IllegalStateException: "No selector for PARENTHESIZED" at KtSimpleNameReference.changeQualifiedName()
• KT-18325 Renaming a parameter name in one implementation silently rename it in all implementations
• KT-18390 Refactor / Copy called for Java class opens only Copy File dialog
• KT-18699 Refactor / Copy, Move loses necessary parentheses
• KT-18738 Misleading quick fix message for an 'open' modifier on an interface member
• KT-19130 Refactor / Inline val: "Show inline dialog for local variables" setting is ignored

JavaScript

Performance Improvements

• KT-18331 JS: compilation performance degrades fast when inlined nested labels are used

Fixes

• KT-4078 JS sourcemaps should contain relative path. The relative base & prefix should be set from project/module preferences
• KT-8020 JS: String? plus operator crashes on runtime
• KT-13919 JS: Source map weirdness
• KT-15456 JS: inlining doesn't work for array constructor with size and lambda
• KT-16984 KotlinJS - 1 > 2 > false causes unhandled javascript exception
• KT-17285 JS: wrong result when call function with default parameter overridden by delegation by function from another interface
• KT-17445 JS: minifier for Kotlin JS apps
• KT-17476 JS: Some symbols in identifiers compile, but are not legal
• KT-17871 JS: spread vararg call doesn't work on functions imported with @jsmodule
• KT-18027 JS: Illegal symbols are possible in backticked labels, but cause crash in runtime and malformed js code
• KT-18032 JS: Illegal symbols are possible in backticked package names, but cause crash in runtime and malformed js code
• KT-18169 JS: reified generic backticked type name containing non-identifier symbols causes malformed JS and runtime crash
• KT-18187 JS backend does not copy non-abstract method of interface to implementing class in some cases
• KT-18201 JS backend generates wrong code for inline function which calls non-inline function from another module
• KT-18652 JS: Objects from same package but from different libraries are incorrectly accessed

Libraries

• KT-18526 Small typo in documentation for kotlin-stdlib / kotlin.collections / retainAll
• KT-18624 JS: Bad return type for Promise.all
• KT-18670 Incorrect documentation of MutableMap.values
• KT-18671 Provide implementation for CoroutineContext.Element functions.

Reflection

• KT-15222 Support reflection for local delegated properties
• KT-14094 IllegalAccessException when try to get members annotated by private annotation with parameter
• KT-16399 Embedded Tomcat fails to load Class-Path: kotlin-runtime.jar from kotlin-reflect-1.0.6.jar
• KT-16810 Do not include incorrect ExternalOverridabilityCondition service file into kotlin-reflect.jar
• KT-18404 “KotlinReflectionInternalError: This callable does not support a default call” when function or constructor has more than 32 parameters
• KT-18476 KClass<*>.superclasses does not contain Any::class
• KT-18480 Kotlin Reflection unable to call getter of protected read-only val with custom getter from parent class

Tools

• KT-18245 NoArg: IllegalAccessError on instantiating sealed class child via Java reflection
• KT-18874 Crash during compilation after switching to 1.1.3-release-IJ2017.2-2
• KT-19047 Private methods are final event if used with the all-open-plugin.

Tools. CLI

• KT-17297 Report error when CLI compiler is not being run under Java 8+
• KT-18599 Support -Xmodule-path and -Xadd-modules arguments for modular compilation on Java 9
• KT-18794 kotlinc-jvm prints an irrelevant error message when a JVM Home directory does not exist
• KT-3045 Report error instead of failing with exception on "kotlinc -script foo.kt"
• KT-18754 Rename CLI argument "-module" to "-Xbuild-file"
• KT-18927 run kotlin app crashes eclipse

Tools. Gradle

• KT-10537 Gradle plugin doesn't pick up changed project.buildDir
• KT-17031 JVM crash on in-process compilation in Gradle with debug
• KT-17035 Gradle Kotlin Plugin can not compile tests calling source internal fields/variables if compileJava dumps classes to a different directory and then copied classes are moved to sourceSets.main.output.classesDir by a different task
• KT-17197 Gradle Kotlin plugin does not wire task dependencies correctly, causing compilation failures
• KT-17618 Pass freeCompilerArgs to compiler unchanged
• KT-18262 kotlin-spring should also open @springboottest classes
• KT-18647 Kotlin incremental compile cannot be disabled.
• KT-18832 Java version parsing error with Gradle Kotlin plugin + JDK 9

Tools. J2K

• KT-10762 J2K removes empty lines from Doc-comments
• KT-13146 J2K goes into infinite loop with anonymous inner class that references itself
• KT-15761 Converting Java to Kotlin corrupts string which includes escaped backslash
• KT-16133 Converting switch statement inserts dead code (possibly as a false positive for fall-through)
• KT-16142 Kotlin Konverter produces empty line in Kdoc
• KT-18038 Java to Kotlin converter messes up empty lines while converting from JavaDoc to KDoc
• KT-18051 Doesn't work the auto-convert Java to Kotlin in Android Studio 3.0
• KT-18141 J2K changes semantic when while does not have a body
• KT-18142 J2K changes semantics when if does not have a body
• KT-18512 J2K Incorrect null parameter conversion

Tools. JPS

• KT-14848 JPS: invalid compiler argument causes exception (see also EA-92062)
• KT-16057 Provide better error message when the same compiler argument is set twice
• KT-19155 IllegalArgumentException: Unsupported kind: PACKAGE_LOCAL_VARIABLE_LIST in incremental compilation

Tools. Maven

• KT-18022 kotlin maven plugin - adding dependencies overwrites arguments.pluginClassPath preventing kapt goal from running
• KT-18224 Maven compilation with JDK 9 fails with InaccessibleObjectException

Tools. REPL

• KT-5620 REPL: Support destructuring declarations
• KT-12564 Kotlin REPL Doesn't Perform Many Checks
• KT-15172 REPL: function declarations that contain empty lines throw error
• KT-18181 REPL: support non-headless execution for Swing code
• KT-18349 REPL: do not show warnings when there are errors

Tools. kapt

• KT-18682 Kapt: Anonymous class types are not rendered properly in stubs
• KT-18758 Kotlin 1.1.3 / Kapt fails with gradle
• KT-18799 Kapt3, IC: Kapt does not generate annotation value for constant values in documented types
• KT-19178 Kapt: Build dependencies from 'kapt' configuration should go into the 'kaptCompile' task dependencies
• KT-19179 Kapt: Gradle silently skips 'kotlinKapt' task sometimes
• KT-19211 Kapt3: Generated classes output is not synchronized with Java classes output in pure Java projects (Gradle 4+)

Previous releases

This release also includes the fixes and improvements from the previous
1.1.3 release.

Compiler

Breaking change: Java-default method calls

Kotlin interface members overriding Java-default methods while targeting JVM 1.6 now produce an error on super calls requiring to be compiled with -jvm-target 1.8 option

Standard library

Revised windowed/pairwise operations

• windowed function now has its step parameter defaulting to 1.
  It also gets an additional optional parameter partialWindows, which controls what to do with incomplete windows in the end. By default it is false, which means incomplete windows are dropped.
• pairwise function name was too confusing, it was unclear how it paired the elements together. Now it is called zipWithNext, so it is more clear that each element is zipped with the next element in a collection.

Common math operations in the standard library

There was a longstanding request to support math operations in the standard library KT-4900. Until now one had to resort to math functions and constants from java.lang.Math class in JVM platform and to kotlin.js.Math which exposed native JS Math functions to Kotlin code in JS platform.
But now we're introducing the following groups of API in the kotlin.math package:

• constants: PI and E;
• trigonometric: cos, sin, tan and inverse of them: acos, asin, atan, atan2;
• hyperbolic: cosh, sinh, tahn;
• exponentation: pow (an extension function), sqrt, hypot, exp, expm1;
• logarithms: log, log2, log10, ln, ln1p;
• rounding:
  - ceil, floor, truncate, round (half to even) functions;
  - roundToInt, roundToLong (half to integer) extension functions;
• sign and absolute value:
  - abs and sign functions;
  - absoluteValue and sign extension properties;
  - withSign extension function;
• max and min of two values;
• binary representation:
  - ulp extension property;
  - nextUp, nextDown, nextTowards extension functions;
  - toBits, toRawBits, Double.fromBits (these are in the kotlin package).

Previous releases

This release also includes fixes and improvements from 1.2-M1 and 1.1.4-eap-54 releases