Changelog 1.2.X

1.2.71

Compiler

• KT-26806 Defining constants using kotlin.math is broken in 1.2.70

IDE

• KT-26399 Kotlin Migration: NPE at KotlinMigrationProjectComponent$onImportFinished$1.run()
• KT-26794 Bad version detection during migration in Android Studio 3.2
• KT-26823 Fix deadlock in databinding with AndroidX which led to Android Studio hanging
• KT-26889 Don't show migration dialog if no actual migrations are available
• KT-25177 Report asDynamic on dynamic type as a warning
• KT-25454 Extract function: make default visibility private

JavaScript

• KT-26466 Uncaught ReferenceError: println is not defined

Tools. Gradle

• KT-26208 inspectClassesForKotlinIC slows down continuous mode in Gradle

Libraries

• KT-26929 Kotlin Reflect and Proguard: can’t find referenced class kotlin.annotations.jvm.ReadOnly/Mutable

1.2.70

Compiler

• KT-13860 Avoid creating KtImportDirective PSI elements for default imports in LazyImportScope
• KT-22201 Generate nullability annotations for data class toString and equals methods.
• KT-23870 SAM adapter method returns null-values for “genericParameterTypes”
• KT-24597 IDE doesn't report missing constructor on inheritance of an expected class in common module
• KT-25120 RequireKotlin on nested class and its members is not loaded correctly
• KT-25193 Names of parameters from Java interface methods implemented by delegation are lost
• KT-25405 Mismatching descriptor type parameters on inner types
• KT-25604 Disable callable references to exprerimental suspend functions
• KT-25665 Add a warning for annotations which target non-existent accessors
• KT-25894 Do not generate body for functions from Any in light class builder mode
• KT-20772 Incorrect smart cast on enum members
• KT-24657 Compiler performance issues with big files
• KT-25745 Do not report warning about annotations on non-existing accessors for JvmStatic properties
• KT-25746 Improve message for warning about annotations that have target to non-existing accessors
• KT-25810 New Inference: Overload resolution ambiguity on method ‘provideDelegate(Nothing?, KProperty<*>)’ when there's more than one provideDelegate operator in scope
• KT-25973 Report metadata version mismatch upon discovering a .kotlin_module file in the dependencies with an incompatible metadata version
• KT-22281 JVM: Incorrect comparison of Double and Float when types are derived from smart-casts
• KT-22649 Compiler: wrong code generated / Couldn't transform method node - using inline extension property inside lambda

IDE

• KT-18301 kotlin needs crazy amount of memory
• KT-23668 Methods with internal visibility have different mangling names in IDE and in compiler
• KT-24892 please remove usages of com.intellij.util.containers.ConcurrentFactoryMap#ConcurrentFactoryMap deprecated long ago
• KT-25144 Quick fix “Change signature” changes class of argument when applied for descendant classes with enabled -Xnew-inference option
• KT-25356 Update Gradle Kotlin-DSL icon according to new IDEA 2018.2 icons style
• KT-20056 TCE on creating object of an anonymous class in Kotlin script
• KT-25092 SourcePsi should be physical leaf element but got OPERATION_REFERENCE
• KT-25249 Uast operates “Unit” type instead of “void”
• KT-25255 Preferences | Languages & Frameworks | Kotlin Updates: show currently installed version
• KT-25297 Inconsistency in KotlinULambdaExpression and KotlinLocalFunctionULambdaExpression
• KT-25515 Add/remove analysis-related compiler setting does not update IDE project model immediately
• KT-25524 UAST: proper resolve for function variable call
• KT-25640 “Configure Kotlin” action changes values of language and API version in project settings

IDE. Debugger

• KT-25147 Conditional breakpoints doesn't work in common code of MPP
• KT-25152 MPP debug doesn't navigate to common code if there are same named files in common and platform parts

IDE. Gradle

• KT-22732 TestNG runner is always used for TestNG tests even when Use Gradle runner is selected
• KT-25913 Honor ‘store generated project files externally option’ for Kotlin facets imported from Gradle
• KT-25955 Support expect/actual in new MPP imported into IDEA

IDE. Inspections and Intentions

New Features

• KT-6633 Inspection to detect unnecessary “with” calls
• KT-25146 Add quick-fix for default parameter value removal
• KT-7675 Create inspection to replace if with let
• KT-13515 Add intention to replace ‘?.let’ with null check
• KT-13854 Need intention actions: to convert property with getter to initializer
• KT-15476 Inspection to convert non-lazy chains of collection functions into sequences
• KT-22068 Force usage of “it” in .forEach{} calls
• KT-23445 Inspection and quickfix to replace assertTrue(a == b) with assertEquals(a, b)
• KT-25270 “return@foo” outside of lambda should have quickfix to remove “@foo” label

Fixes

• KT-11154 Spell checking inspection is not suppressable
• KT-18681 “Replace ‘if’ with ‘when’” generates unnecessary else block
• KT-24001 “Suspicious combination of == and ===” false positive
• KT-24385 Convert lambda to reference refactor produces red code with companion object
• KT-24694 Move lambda out of parentheses should not be applied for multiple functional parameters
• KT-25089 False-positive “Call chain on collection type can be simplified” for map and joinToString on a HashMap
• KT-25169 Impossible to suppress UAST/JVM inspections
• KT-25321 Safe delete of a class property implementing constructor parameter at the platform side doesn't remove all the related declarations
• KT-25539 Make class open quick fix doesn't update all the related implementations of a multiplatform class
• KT-25608 Confusing “Redundant override” inspection message
• KT-16422 Replace lambda with method reference inspections fails
• KT-21999 Convert lambda to reference adds this with incorrect label
• KT-23467 False positive suspicious callable reference on scoping function called on another lambda
• KT-25044 “Implement member” quick-fix should not generate ‘actual’ modifier with expect declaration in interface only
• KT-25579 Redundant semicolon erroneously reported during local var modifier ambiguity
• KT-25633 “Add kotlin-XXX.jar to the classpath” quick fix adds dependency with invalid version in Gradle-based projects
• KT-25739 “Convert to run” / “Convert to with” intentions incorrectly process references to Java static members
• KT-25928 “Let extend” quick fix is suggested in case of nullable/non-null TYPE_MISMATCH collision
• KT-26042 False positive “Remove redundant ‘.let’ call” for lambda with destructured arguments

IDE. KDoc

• KT-22815 Update quick documentation
• KT-22648 Quick Doc popup: break (long?) declarations into several lines

IDE. Libraries

• KT-25129 Idea freezes when Kotlin plugin tries to determine if jar is js lib in jvm module

IDE. Navigation

• KT-25317 Go to actual declaration keyboard shortcut doesn't work for expect object, showing “No implementations found” message
• KT-25492 Find usages: keep Expected functions option state while searching for usages of a regular function
• KT-25498 Find Usages doesn't show Supertype usages of actual declarations with constructor

IDE. Project View

• KT-22823 Text pasted into package is parsed as Kotlin before Java

IDE. Refactorings

• KT-22072 “Convert MutableMap.put to assignment” should not be applicable when put is used as expression
• KT-23590 Incorrect conflict warning “Internal function will not be accessible” when moving class from jvm to common module
• KT-23594 Incorrect conflict warning about IllegalStateException when moving class from jvm to common module
• KT-23772 MPP: Refactor / Rename class does not update name of file containing related expect/actual class
• KT-23914 Safe search false positives during moves between common and actual modules
• KT-25326 Refactor/Safe Delete doesn't report actual object usages
• KT-25438 Refactor/Safe delete of a multiplatform companion object: usage is not reported
• KT-25857 Refactoring → Move moves whole file in case of moving class from Kotlin script
• KT-25858 Refactoring → Move can be called only for class declarations in Kotlin script

IDE. Script

• KT-25814 IDE scripting console -> kotlin (JSR-223) - compilation errors - unresolved IDEA classes
• KT-25822 jvmTarget from the script compiler options is ignored in the IDE

IDE. Multiplatform

• KT-23368 IDE: Build: JPS errors are reported for valid non-multiplatform module depending on multiplatform one

IDE. Ultimate

• KT-25595 Rename Kotlin-specific “Protractor” run configuration to distinguish it from the one provided by NodeJS plugin
• KT-19309 Spring JPA Repository IntelliJ tooling with Kotlin

IDE. Tests Support

• KT-26228 NoClassDefFoundError: org/jetbrains/kotlin/idea/run/KotlinTestNgConfigurationProducer on running a JUnit test with TestNG plugin disabled

Reflection

• KT-25541 Incorrect parameter names in reflection for inner class constructor from Java class compiled with “-parameters”

Tools. CLI

• KT-21910 Add -Xfriend-paths compiler argument to support internal visibility checks in production/test sources from external build systems
• KT-25554 Do not report warnings when -XXLanguage was used to turn on deprecation
• KT-25196 Optional expected annotation is visible in platforms where it doesn't have actual

Tools. JPS

• KT-25540 JPS JS IC does not recompile usages from other modules when package is different

Tools. kapt

• KT-25396 KAPT Error: Unknown option: infoAsWarnings
• KT-26211 Kotlin plugin 1.2.60+ breaks IDEA source/resource/test roots in a Maven project with Kapt

Tools. Gradle

• KT-25025 Inter-project IC for JS in Gradle
• KT-25455 Gradle IC: when class signature is changed its indirect subclasses in different module are not recompiled

Tools. JPS

• KT-25998 Build process starts compiling w/o any changes (on release version)
• KT-25977 Can not run a Kotlin test
• KT-26072 MPP compilation issue
• KT-26113 Build takes around 20 seconds in already fully built IDEA project

Tools. Scripts

• KT-26142 update maven-central remote repository url

Tools. Incremental Compile

• KT-26528 ISE “To save disabled cache status [delete] should be called (this behavior is kept for compatibility)” on compiling project with enabled IC in Maven

JavaScript

• KT-22053 JS: Secondary constructor of Throwable inheritor doesn't call to primary one
• KT-26064 JS inliner calls wrong constructor in incremental build
• KT-26117 JS runtime error: ArrayList_init instead of ArrayList_init_0

Libraries

• KT-18067 KotlinJS - String.compareTo(other: String, ignoreCase: Boolean = false): Int
• KT-19507 Using @JvmName from stdlib-common fails to compile in JS module.
• KT-19508 Add @JsName to stdlib-common for controlling JS implementation
• KT-24478 Annotate relevant standard library annotations with @OptionalExpectation
• KT-25980 JvmSynthetic annotation has no description in the docs

1.2.60

Compiler

• KT-13762 Prohibit annotations with target ‘EXPRESSION’ and retention ‘BINARY’ or ‘RUNTIME’
• KT-18882 Allow code to have platform specific annotations when compiled for different platforms
• KT-20356 Internal compiler error - This method shouldn't be invoked for INVISIBLE_FAKE visibility
• KT-22517 Deprecate smartcasts for local delegated properties
• KT-23153 Compiler allows to set non constant value as annotation parameter
• KT-23413 IndexOutOfBoundsException on local delegated properties from provideDelegate if there's at least one non-local delegated property
• KT-23742 Optimise inline class redundant boxing on return from inlined lambda
• KT-24513 High memory usage in Kotlin and 2018.1
• KT-24617 Optional expected annotation is unresolved in a dependent platform module
• KT-24679 KotlinUCallExpression doesn't resolve callee if it is an inline method
• KT-24808 NI: nested withContext call is reported with Suspension functions can be called only within coroutine body error
• KT-24825 NoClassDefFoundError on SAM adapter in a nested call in inlined lambda since 1.2.40
• KT-24859 Disallow calls of functions annotated with receiver annotated with @RestrictsSuspension in foreign suspension context
• KT-24911 Kotlin 1.2.50: UI for @RecentlyNonNull looks strange in the editor
• KT-25333 Restrict visibility of Java static members from supertypes of companion object

IDE

Performance Improvements

• KT-20924 Slow KtLightAbstractAnnotation.getClsDelegate() lightAnnotations.kt
• KT-23844 Kotlin property accessor searcher consumes CPU when invoked on a scope consisting only of Java files

Fixes

• KT-4311 “Override members” works wrong when function is extension
• KT-13948 IDE plugins: improve description
• KT-15300 “INFO - project.TargetPlatformDetector - Using default platform” flood in log
• KT-17350 Implement members from interface fails when one of the generic types is unresolved
• KT-17668 Edit Configuration dialog doesn't have a button for choosing the “Main class” field
• KT-19102 Wrong equals() and hashCode() code generated for arrays of arrays
• KT-20056 TCE on creating object of an anonymous class in Kotlin script
• KT-21863 Imported typealias to object declared as “Unused import directive” when only referring to methods
• KT-23272 Git commit not working
• KT-23407 Pasting callable reference from different package suggests imports, but inserts incompilable FQN
• KT-23456 UAST: Enum constant constructor call arguments missing from Kotlin enums
• KT-23942 Fix building light-classes for MPP project containing multi-file facades
• KT-24072 Kotlin SDK appears as many times as there are modules in the project
• KT-24412 Kotlin create project wizard: Kotlin/JS no SDK
• KT-24933 please remove usages of com.intellij.psi.search.searches.DirectClassInheritorsSearch#search(com.intellij.psi.PsiClass, com.intellij.psi.search.SearchScope, boolean, boolean) deprecated long ago
• KT-24943 Project leak via LibraryEffectiveKindProviderImpl
• KT-24979 IndexNotReadyException in KtLightClassForSourceDeclaration#isInheritor
• KT-24958 Escaping goes insane when editing interpolated string in injected fragment editor
• KT-25024 Wrong resolve scope while resolving java.lang.String PsiClassReferenceType
• KT-25092 SourcePsi should be physical leaf element but got OPERATION_REFERENCE
• KT-25242 ‘Resolved to error element’ highlighting is confusingly similar to an active live template
• KT-25249 Uast operates “Unit” type instead of “void”
• KT-25255 Preferences | Languages & Frameworks | Kotlin Updates: show currently installed version
• KT-25297 Inconsistency in KotlinULambdaExpression and KotlinLocalFunctionULambdaExpression
• KT-25414 Support checking eap-1.3 channel for updates
• KT-25524 UAST: proper resolve for function variable call
• KT-25546 Create popup in 1.2.x plugin if user upgrade version in gradle or maven to kotlin 1.3

IDE. Android

• KT-17946 Android Studio: remove Gradle configurator on configuring Kotlin
• KT-23040 Wrong run configuration classpath in a mixed Java/Android project
• KT-24321 Actual implementations from Android platform module are wrongly reported with no corresponding expected declaration in IDE
• KT-25018 Exception Dependencies for org.jetbrains.kotlin.resolve.calls.* cannot be satisfied on a simple project in AS 3.2 Canary

IDE. Code Style, Formatting

• KT-14066 Comments on when branches are misplaced
• KT-25008 Formatter: Use single indent for multiline elvis operator

IDE. Completion

• KT-23627 Autocompletion inserts FQN of stdlib functions inside of scoping lambda called on explicit this
• KT-25239 Add postfix template for listOf/setOf/etc

IDE. Debugger

• KT-23162 Evaluate expression in multiplatform common test fails with JvmName missing when run in JVM
• KT-24903 Descriptors leak from KotlinMethodSmartStepTarget

IDE. Decompiler

• KT-23981 Kotlin bytecode decompiler works in AWT thread

IDE. Gradle

• KT-24614 Gradle can't get published versions until commenting repositories in settings.gradle

IDE. Gradle. Script

• KT-24588 Multiple Gradle Kotlin DSL script files dependencies lifecycle is flawed

IDE. Hints

• KT-22432 Type hints: Don't include “.Companion” in the names of types defined inside companion object
• KT-22653 Lambda return hint is duplicated for increment/decrement expressions
• KT-24828 Double return hints on labeled expressions

IDE. Inspections and Intentions

New Features

• KT-7710 Intention to convert lambda to anonymous function
• KT-11850 Add nested lambdas with implicit parameters warning
• KT-13688 Add ‘Change to val’ quickfix for delegates without setValue
• KT-13782 Intention (and may be inspection) to convert toString() call to string template
• KT-14779 Inspection to replace String.format with string templates
• KT-15666 Unused symbol: delete header & its implementations together
• KT-18810 Quick-fix for ‘is’ absence in when
• KT-22871 Add quickfix to move const val into companion object
• KT-23082 Add quick-fix for type variance conflict
• KT-23306 Add intention of putting remaining when-values even in end, and even if there is “else”
• KT-23897 Inspections: report extension functions declared in same class
• KT-24295 Add “Remove ‘lateinit’” quickfix
• KT-24509 Inspection “JUnit tests should return Unit”
• KT-24815 Add Quick fix to remove illegal “const” modifier
• KT-25238 Add quickfix wrapping expression into listOf/setOf/etc in case of type mismatch

Fixes

• KT-12298 Fix override signature doesn't remove bogus reciever
• KT-20523 Don't mark as unused functions with @kotlin.test.* annotations and classes with such members
• KT-20583 Report “redundant let” even for it in argument position
• KT-21556 “Call chain on collection type may be simplified” generates uncompiled code on IntArray
• KT-22030 Invalid Function can be private inspection
• KT-22041 “Convert lambda to reference” suggested incorrectly
• KT-22089 Explict This inspection false negative with synthetic Java property
• KT-22094 Can be private false positive with function called from lambda inside inline function
• KT-22162 Add indices to loop fails on destructing declarator
• KT-22180 “Can be private” false positive when function is called by inline function inside property initializer
• KT-22371 “Create secondary constructor” quick fix is not suggested for supertype constructor reference
• KT-22758 “Create ...” and “Import” quick fixes are not available on unresolved class name in primary constructor
• KT-23105 Create actual implementation shouldn't generate default parameter values
• KT-23106 Implement methods should respect actual modifier as well
• KT-23326 “Add missing actual members” quick fix fails with AE at KtPsiFactory.createDeclaration() with wrong expect code
• KT-23452 “Remove unnecessary parentheses” reports parens of returned function
• KT-23686 “Add missing actual members” should not add primary actual constructor if it's present as secondary one
• KT-23697 Android project with ‘org.jetbrains.kotlin.platform.android’ plugin: all multiplatform IDE features are absent
• KT-23752 False positive “Remove variable” quick fix on property has lambda or anonymous function initializer
• KT-23762 Add missing actual members quick fix adds actual declaration for val/var again if it was in the primary constructor
• KT-23788 Can't convert long char literal to string if it starts with backslash
• KT-23860 Import quick fix is not available in class constructor containing transitive dependency parameters
• KT-24349 False positive “Call on collection type may be reduced”
• KT-24374 “Class member can have private visibility” inspection reports expect members
• KT-24422 Android Studio erroneously reporting that @Inject lateinit var can be made private
• KT-24423 False inspection warning “redundant type checks for object”
• KT-24425 wrong hint remove redundant Companion
• KT-24537 False positive property can be private on actual properties in a multiplatform project
• KT-24557 False warning “Remove redundant call” for nullable.toString
• KT-24562 actual extension function implementation warns Receiver type unused
• KT-24632 Quick fix to add getter and setter shouldn't use field when it is not allowed
• KT-24816 Inspection: Sealed subclass can be object shouldn't be reported on classes with state

IDE. JS

• KT-5948 JS: project shouldn't have “Java file” in new item menu

IDE. Multiplatform

• KT-23722 MPP: Run tests from common modules should recompile correspond JVM implementation module
• KT-24159 MPP: Show Kotlin Bytecode does not work for common code
• KT-24839 freeCompilerArgs are not imported into Kotlin facet of Android module in IDEA

IDE. Navigation

• KT-11477 Kotlin searchers consume CPU in a project without any Kotlin files
• KT-17512 Finding usages of actual declarations in common modules
• KT-20825 Header icon on actual class is lost on new line adding
• KT-21011 Difference in information shown for “Is subclassed by” gutter on mouse hovering and clicking
• KT-21113 Expected gutter icon on companion object is unstable
• KT-21710 Override gutter markers are missing for types in sources jar
• KT-22177 Double “A” icon for an expect class with constructor
• KT-23685 Navigation from expect part to actual with ctrl+alt+B shortcut should provide a choice to what actual part to go
• KT-24812 Search suggestion text overlaps for long names

IDE. Refactorings

• KT-15159 Introduce typealias: Incorrect applying of a typealias in constructor calls in val/var and AssertionError
• KT-15351 Extract Superclass/Interface: existent target file name is rejected; TCE: “null cannot be cast to non-null type org.jetbrains.kotlin.psi.KtFile” at ExtractSuperRefactoring.createClass()
• KT-16281 Extract Interface: private member with Make Abstract = Yes produces incompilable code
• KT-16284 Extract Interface/Superclass: reference to private member turns incompilable, when referring element is made abstract
• KT-17235 Introduce Parameter leaks listener if refactoring is cancelled while in progress
• KT-17742 Refactor / Rename Java getter to get() does not update Kotlin references
• KT-18555 Refactor / Extract Interface, Superclass: Throwable: “Refactorings should be invoked inside transaction” at RefactoringDialog.show()
• KT-18736 Extract interface: import for property type is omitted
• KT-20260 AE “Unexpected container” on calling Refactor → Move for class in Kotlin script
• KT-20465 “Introduce variable” in build.gradle.kts creates a variable with no template to change its name
• KT-20467 Refactor → Extract Function: CCE “KtNamedFunction cannot be cast to KtClassOrObject” on calling refactoring for constructor
• KT-20469 NDFDE “Descriptor wasn't found for declaration VALUE_PARAMETER” on calling Refactor → Extract Function on constructor argument
• KT-22931 Converting a scoping function with receiver into one with parameter may change the semantics
• KT-23983 Extract function: Reified type parameters are not extracted properly
• KT-24460 Rename refactoring does not update super call
• KT-24574 Changing Java constructor signature from Kotlin usage is totally broken
• KT-24712 Extract Function Parameter misses ‘suspend’ for lambda type
• KT-24763 “Change signature” refactoring breaks Kotlin code
• KT-24968 Type hints disappear after “Copy” refactoring
• KT-24992 The IDE got stuck showing a modal dialog (kotlin refactoring) and doesn’t react to any actions

IDE. Script

• KT-25373 Deadlock in idea plugin

IDE. Tests Support

• KT-18319 Gradle: Run tests action does not work when test name contains spaces
• KT-22306 Empty gutter menu for main() and test methods in Kotlin/JS project
• KT-23672 JUnit test runner is unaware of @kotlin.test.Test tests when used in common multiplatform module, even if looked from JVM multiplatform module
• KT-25253 No “run” gutter icons for tests in Kotlin/JS project

JavaScript

• KT-22376 JS: TranslationRuntimeException on ‘for (x in (“a”))’
• KT-23458 ClassCastException when compiling when statements to JS

Libraries

• KT-24204 Empty progression last value overflows resulting in progression being non-empty
• KT-25351 TestNGAsserter needs to swap expected/actual

Reflection

• KT-16616 KotlinReflectionInternalError: Reflection on built-in Kotlin types is not yet fully supported in getMembersOfStandardJavaClasses.kt
• KT-17542 KotlinReflectionInternalError on ::values of enum class
• KT-20442 ReflectJvmMapping.getJavaConstructor() fails with Call is not yet supported for anonymous class
• KT-21973 Method.kotlinFunction for top level extension function returns null when app is started from test sources
• KT-22048 Reflection explodes when attempting to get constructors of an enum with overridden method

Tools. Android Extensions

• KT-22576 Parcelable: Allow Parcelize to work with object and enum types
• KT-24459 @IgnoredOnParcel annotation doesn't work for @Parcelize
• KT-24720 Parcelable: java.lang.LinkageError

Tools. Compiler Plugins

• KT-23808 Array in @Parcelize class generates an java.lang.VerifyError

Tools. Gradle

• KT-18621 org.jetbrains.kotlin.incremental.fileUtils.kt conflicts when compiler and gradle plugin in classpath
• KT-24497 Externalized all-open plugin is not applied to a project
• KT-24559 Multiple Kotlin daemon instances are started when building MPP with Gradle
• KT-24560 Multiple Kotlin daemon instances are started when Gradle parallel build is used
• KT-24653 Kotlin plugins don't work when classpath dependency is not declared in current or root project
• KT-24675 Use Gradle dependency resolution to get compiler classpath
• KT-24676 Use Gradle dependency resolution to form compiler plugin classpath
• KT-24946 ISE: “The provided plugin org.jetbrains.kotlin.scripting.compiler.plugin.ScriptingCompilerConfigurationComponentRegistrar is not compatible with this version of compiler” when build simple Gradle with Zulu JDK

Tools. Incremental Compile

• KT-25051 Change in “kotlin-android” project w/o package parts causes non-incremental compilation of dependent modules

Tools. J2K

• KT-9945 converting java to kotlin confuses git

Tools. JPS

• KT-19957 Support incremental compilation to JS in JPS
• KT-22611 Support compiling scripts in JPS
• KT-23558 JPS: Support multiplatform projects
• KT-23757 JPS: Incremental multiplatform projects compilation
• KT-24936 Don't use internal terms in compiler progress messages
• KT-25218 Build fails as Javac doesn't see Kotlin classes

Tools. Scripts

• KT-24926 NoSuchElementException in TemplateAnnotationVisitor when upgrading the Gradle Kotlin DSL to Kotlin 1.2.50

Tools. kapt

• KT-24313 Unable to use KAPT when dependency to it is added to buildSrc
• KT-24449 ‘kapt.kotlin.generated’ is not marked as source root in Android Studio 3.1 and 3.2
• KT-24538 Kapt performs Kotlin compilation when annotation processors are not configured
• KT-24919 Caused by: org.gradle.api.InvalidUserDataException: ‘projectDir’ is not a file
• KT-24963 gradle kapt plugin's assumption on build dir causing duplicate class error
• KT-24985 Kapt: Allow to disable info->warning mapping in logger
• KT-25071 kapt sometimes emits java stubs with imports that should be static imports
• KT-25131 Kapt should not load annotation processors when generating stubs

1.2.51

Backend. JVM

• KT-23943 Wrong autoboxing for non-null inline class inside elvis with null constant
• KT-24952 EnumConstantNotPresentExceptionProxy from Java reflection on annotation class with target TYPE on JVM < 8
• KT-24986 Android project release build with ProGuard enabled crashes with IllegalAccessError: Final field cannot be written to by method

Binary Metadata

• KT-24944 Exception from stubs: “Unknown type parameter with id = 1” (EA-120997)

Reflection

• KT-23962 MalformedParameterizedTypeException when reflecting GeneratedMessageLite.ExtendableMessage

Tools. Gradle

• KT-24956 Kotlin Gradle plugin's inspectClassesForKotlinIC task for the new 1.2.50 release takes incredibly long
• KT-23866 Kapt plugin should pass arguments from compiler argument providers to annotation processors
• KT-24716 1.2.50 emits warning “Classpath entry points to a non-existent location:”
• KT-24832 Inter-project IC does not work when “kotlin-android” project depends on “kotlin” project
• KT-24938 Gradle parallel execution fails on multi-module Gradle Project
• KT-25027 Kapt plugin: Kapt and KaptGenerateStubs tasks have some incorrect inputs

Tools. Scripts

• KT-24926 NoSuchElementException in TemplateAnnotationVisitor when upgrading the Gradle Kotlin DSL to Kotlin 1.2.50

1.2.50

Compiler

• KT-23360 Do not serialize annotations with retention SOURCE to metadata
• KT-24278 Hard-code to kotlin compiler annotation for android library migration
• KT-24472 Support argfiles in kotlinc with -Xargfile
• KT-24593 Support -XXLanguage:{+|-}LanguageFeature compiler arguments to enable/disable specific features
• KT-24637 Introduce “progressive” mode of compiler

Backend. JS

• KT-23094 JS compiler: Delegation fails to pass the continuation parameter to child suspend function
• KT-23582 JS: Fails to inline, produces bad code
• KT-24335 JS: Invalid implement of external interface

Backend. JVM

• KT-12330 Slightly improve generated bytecode for data class equals/hashCode methods
• KT-18576 Debugger fails to show decomposed suspend lambda parameters
• KT-22063 Add intrinsics for javaObjectType and javaPrimitiveType
• KT-23402 Internal error: Couldn‘t inline method call because the compiler couldn’t obtain compiled body for inline function with reified type parameter
• KT-23704 Unstable checkExpressionValueIsNotNull() generation in bytecode
• KT-23707 Unstable bridge generation order
• KT-23857 Annotation with target TYPE is not applicable to TYPE_USE in Java sources
• KT-23910 @JvmOverloads doesn't work with default arguments in common code
• KT-24427 Protected function having toArray-like signature from collection becomes public in bytecode
• KT-24661 Support binary compatibility mode for @JvmDefault

Frontend

• KT-21129 Unused parameter in property setter is not reported
• KT-21157 Kotlin script: engine can take forever to eval certain code after several times
• KT-22740 REPL slows down during extensions compiling
• KT-23124 Kotlin multiplatform project causes IntelliJ build errors
• KT-23209 Compiler throwing frontend exception
• KT-23589 Report a warning on local annotation classes
• KT-23760 Unable to implement common interface with fun member function with typealiased parameter

Android

• KT-23244 Option to Disable View Binding generation in Kotlin Android Extensions Plugin

IDE

• KT-8407 TestNG: running tests from context creates new run configuration every time
• KT-9218 Searching for compilable files takes too long
• KT-15019 Editor: args reference in .kts file is red
• KT-18769 Expand Selection on opening curly brace should select the entire block right away
• KT-19055 Idea hangs on copy-paste big Kotlin files
• KT-20605 Unresolved reference on instance from common module function
• KT-20824 Type mismatch for common function taking a non-mapped Kotlin's expected class from stdlib-common, with actual typealias on JVM
• KT-20897 Can't navigate to declaration after PsiInvalidElementAccessException exception
• KT-22527 Kotlin UAST does not evaluate values inside delegation expressions
• KT-22868 Implementing an expected class declaration using actual typealias produces “good code that is red”
• KT-22922 Override Members should add experimental annotation when required
• KT-23384 Hotspot in org.jetbrains.kotlin.idea.caches.resolve.IDELightClassGenerationSupport.getKotlinInternalClasses(FqName, GlobalSearchScope) IDELightClassGenerationSupport.kt ?
• KT-23408 Don't render @NonNull and @Nullable annotations in parameter info for Java methods
• KT-23557 Expression Bodies should have implicit return in Uast
• KT-23745 Unable to implement common interface
• KT-23746 Logger$EmptyThrowable “[kts] cannot find a valid script definition annotation on the class class ScriptTemplateWithArgs” with LivePlugin enabled
• KT-23975 Move Kotlin internal actions under Idea Internal actions menu
• KT-24268 Other main menu item
• KT-24438 ISE “The provided plugin org.jetbrains.kotlin.scripting.compiler.plugin.ScriptingCompilerConfigurationComponentRegistrar is not compatible with this version of compiler” after rebuilding simple Gradle-based project via JPS.

IDE. Configuration

• KT-10935 Add menu entry to create new kotlin .kts scripts
• KT-20511 Library added from maven (using IDEA UI) is not detected as Kotlin/JS library (since type=“repository”)
• KT-20665 Kotlin Gradle script created by New Project/Module wizard fails with Gradle 4.1+
• KT-21844 Create Kotlin class dialog: make class abstract automatically
• KT-22305 Language and API versions of Kotlin compiler are “Latest” by default in some ways of creating new project
• KT-23261 New MPP design: please show popup with error message if module name is not set
• KT-23638 Kotlin plugin breaks project opening for PhpStorm/WebStorm
• KT-23658 Unclear options “Gradle” and “Gradle (Javascript)” on configuring Kotlin in Gradle- and Maven-based projects
• KT-23845 IntelliJ Maven Plugin does not pass javaParameters option to Kotlin facet
• KT-23980 Move “Update Channel” from “Configure Kotlin Plugin Updates” to settings
• KT-24504 Existent JPS-based Kotlin/JS module is converted to new format, while New Project wizard and facet manipulations still create old format

IDE. Debugger

• KT-23886 Both java and kotlin breakpoints in kotlin files
• KT-24136 Debugger: update drop-down menu for the line with lambdas

IDE. Editing

• KT-2582 When user inputs triple quote, add matching triple quote automatically
• KT-5206 Long lists of arguments are not foldable
• KT-23457 Auto-import and Import quick fix do not suggest classes from common module [Common test can't find class with word Abstract in name.]
• KT-23235 Super slow editing with auto imports enabled

IDE. Gradle

• KT-23234 Test names for tests containing inner classes are sporadically reported to teamcity runs.
• KT-23383 Optional plugin dependency for kotlin gradle plugin ‘java’ subsystem dependent features
• KT-22588 Resolver for ‘project source roots and libraries for platform JVM’ does not know how to resolve on Gradle Kotlin DSL project without Java and Kotlin
• KT-23616 Synchronize script dependencies not at Gradle Sync
• KT-24444 Do not store proxy objects from Gradle importer in the project model
• KT-24586 MVNFE “Cannot resolve external dependency org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.2.41 because no repositories are defined.” on creating Gradle project with Kotlin only (probably due to lack of repositories block)
• KT-24671 dependencies missed in buildscript block after creating new Gradle-based project in 173 IDEA

IDE. Inspections and Intentions

New Features

• KT-7822 Convert foreach to for loop should place caret on the variable declaration
• KT-9943 Quick fix/Intention to indent a raw string
• KT-15063 Inspection for coroutine: unused Deferred result
• KT-16085 Inspection “main should return Unit”
• KT-20305 Inspection: Refactor sealed sub-class to object
• KT-21413 Missing inspection: parentheses can be deleted when the only constructor parameter is a function not existing
• KT-23137 Intention for converting to block comment and vise versa
• KT-23266 Add intention(s) to put arguments / parameters on one line
• KT-23419 Intention to replace vararg with array and vice versa
• KT-23617 Add inspection: redundant internal in local anonymous object / class
• KT-23775 IntelliJ plugin: improve “accessor call that can be replaced with property”
• KT-24235 Inspection to replace async.await with withContext
• KT-24263 Add Make variable immutable quickfix for const
• KT-24433 Inspection for coroutines: unused async result

Performance Improvements

• KT-23566 “Can be private” works on ResolutionResultsCache.kt (from Kotlin project) enormously slow

Fixes

• KT-6364 Incorrect quick-fixes are suggested for nullable extension function call
• KT-11156 Incorrect highlighting for nested class in “Redundant SAM-constructor” inspection
• KT-11427 “Replace if with when” does not take break / continue into account
• KT-11740 Invert if condition intention should not remove line breaks
• KT-12042 “Merge with next when” is not applicable when the statements delimited by semicolon or comment
• KT-12168 “Remove explicit type specification” intention produce incompilable code in case of function type
• KT-14391 RemoveUnnecessaryParenthesesIntention lost comment on closing parenthesis
• KT-14556 Quickfix to suggest use of spread operator does not work with mapOf
• KT-15195 Redundant parentheses shouldn't be reported if lambda is not on the same line
• KT-16770 Change type of function quickfix does not propose most idiomatic solutions
• KT-19629 “Convert to primary constructor” quick fix should not move init{...} section down
• KT-20123 Kotlin Gradle script: “Refactoring cannot be performed. Cannot modify build.gradle.kts” for some refactorings and intentions
• KT-20332 Unused property declaration suppression by annotation doesn't work if annotation is targeted to getter
• KT-21878 “arrayOf() call can be replaced by array litteral [...]” quick fix inserts extra parentheses
• KT-22092 Intention “Specify return type explicitly”: Propose types from overriden declarations
• KT-22615 “Replace with” intention does not work for equal names
• KT-22632 Gutter icon “go to actual declaration” is absent for enum values on actual side
• KT-22741 Wrong suggestion for Replace 'if' expression with elvis expression
• KT-22831 Inspection for converting to elvis operator does not work for local vars
• KT-22860 “Add annotation target” quick fix does not take into account existent annotations in Java source
• KT-22918 Create interface quickfix is missing ‘current class’ container
• KT-23133 “Remove redundant calls of the conversion method” wrongly shown for Boolan to Int conversion
• KT-23167 Report “use expression body” also on left brace
• KT-23194 Inspection “map.put() should be converted to assignment” leads to red code in case of labled return
• KT-23303 “Might be const” inspection does not check explicit type specification
• KT-23320 Quick fix to add constructor invocation doesn't work for sealed classes
• KT-23321 Intention to move type to separate file shouldn't be available for sealed classes
• KT-23346 Lift Assignment quick fix incorrectly processes block assignments
• KT-23377 Simplify boolean expression produces incorrect results when mixing nullable and non-nullable variables
• KT-23465 False positive suspicious callable reference on lambda invoke with parameters
• KT-23511 “Remove parameter” quick fix makes generic function call incompilable when type could be inferred from removed parameter only
• KT-23513 “Remove parameter” quick fix makes caret jump to the top of the editor
• KT-23559 Wrong hint text for “assignment can be replaced with operator assignment”
• KT-23608 AE “Failed to create expression from text” after applying quick fix “Convert too long character literal to string”
• KT-23620 False positive Redundant Companion reference on calling object from companion
• KT-23634 ‘Add use-site target’ intention drops annotation arguments
• KT-23753 “Remove variable” quick fix should not remove comment
• KT-23756 Bogus “Might be const” warning in object expression
• KT-23778 “Convert function to property” intention shows broken warning
• KT-23796 “Create extension function/property” quick fix suggests one for nullable type while creates for not-null
• KT-23801 “Convert to constructor” (IntelliJ) quick fix uses wrong use-site target for annotating properties
• KT-23977 wrong hint Unit redundant
• KT-24066 ‘Remove redundant Unit’ false positive when Unit is returned as Any
• KT-24165 @Deprecated ReplaceWith Constant gets replaced with nothing
• KT-24207 Add parameter intent/red bulb should use auto casted type.
• KT-24215 ReplaceWith produces broken code for lambda following default parameter

IDE. Multiplatform

• KT-20406 Overload resolution ambiguity in IDE on expect class / actual typealias from kotlin-stdlib-common / kotlin-stdlib
• KT-24316 Missing dependencies in Kotlin MPP when using gradle composite builds

IDE. Navigation

• KT-7622 Searching usages of a field/constructor parameter in a private class seems to scan through the whole project
• KT-23182 Find Usages checks whether there are unused variables in functions which contain search result candidates
• KT-23223 Navigate to actual declaration from actual usage

IDE. Refactorings

• KT-12078 Introduce Variable adds explicit type when invoked on anonymous object
• KT-15517 Change signature refactoring shows confusing warning dialog
• KT-22387 Change signature reports “Type cannot be resolved” for class from different package
• KT-22669 Refactor / Copy Kotlin source to plain text causes CCE: “PsiPlainTextFileImpl cannot be cast to KtFile” at CopyKotlinDeclarationsHandler$doCopy$2$1$1.invoke()
• KT-22888 Rename completion cuts off all characters except letters from existent name
• KT-23298 AE: “2 declarations in null...” on rename of a field to object or class
• KT-23563 null by org.jetbrains.kotlin.idea.refactoring.rename.KotlinMemberInplaceRenameHandler$RenamerImpl exception on trying in-place Rename of non-scratch functions
• KT-23613 Kotlin safe delete processor handles java code when it should not
• KT-23644 Named parameters in generated Kotlin Annotations
• KT-23714 Add Parameter quickfix not working when the called method is in java.
• KT-23838 Do not search for usages in other files when renaming local variable
• KT-24069 ‘Create from usage’ doesn't use type info with smart casts

IDE. Scratch

• KT-6928 Support Kotlin scratch files
• KT-23441 Scratch options reset on IDE restart
• KT-23480 java.util.NoSuchElementException: “Collection contains no element matching the predicate” on run of a scratch file with unresolved function parameter
• KT-23587 Scratch: references from scratch file aren't taken into account
• KT-24016 Make long scratch output lines readable
• KT-24315 Checkbox labels aren't aligned in scratch panel
• KT-24636 Run Scratch when there are compilation errors in module

Tools. J2K

• KT-22989 Exception “Assertion failed: Refactorings should be invoked inside transaction” on creating UI Component/Notification

Libraries

• KT-10456 Common Int.toString(radix: Int) method
• KT-22298 Improve docs for Array.copyOf(newSize: Int)
• KT-22400 coroutineContext shall be in kotlin.coroutines.experimental package
• KT-23356 Cross-platform function to convert CharArray slice to String
• KT-23920 CharSequence.trimEnd calls substring instead of subSequence
• KT-24353 Add support for junit 5 in kotlin.test
• KT-24371 Invalid @returns tag does not display in Android Studio popup properly

Gradle plugin

• KT-20214 NoClassDefFound from Gradle (should report missing tools.jar)
• KT-20608 Cannot reference operator overloads across submodules (.kotlin_module not loaded when a module name has a slash)
• KT-22431 Inter-project incremental compilation does not work with Android plugin 2.3+
• KT-22510 Common sources aren't added when compiling custom source set with Gradle multiplatform plugin
• KT-22623 Kotlin JVM tasks in independent projects are not executed in parallel with Gradle 4.2+ and Kotlin 1.2.20+
• KT-23092 Gradle plugin for MPP common modules should not remove the ‘compileJava’ task from project.tasks
• KT-23574 ‘archivesBaseName’ does not affect module name in common modules
• KT-23719 Incorrect Gradle Warning for expectedBy in kotlin-platform-android module
• KT-23878 Kapt: Annotation processors are run when formatting is changed
• KT-24420 Kapt plugin: Kapt task has overlapping outputs (and inputs) with Gradle's JavaCompile task
• KT-24440 Gradle daemon OOM due to function descriptors stuck forever

Tools. kapt

• KT-23286 kapt + nonascii = weird pathes
• KT-23427 kapt: for element with multiple annotations, annotation values erroneously use default when first annotation uses default
• KT-23721 Warning informing user that ‘tools.jar’ is absent in the plugin classpath is not show when there is also an error
• KT-23898 Kapt: Do now show a warning for APs from ‘annotationProcessor’ configuration also declared in ‘kapt’ configuration
• KT-23964 Kotlin Gradle plugin does not define inputs and outputs of annotation processors

1.2.41

Compiler – Fixes

• KT-23901 Incremental compilation fails on Java 9
• KT-23931 Exception on optimizing eternal loops
• KT-23900 Exception on some cases with nested arrays
• KT-23809 Exception on processing complex hierarchies with suspend functions when -Xdump-declarations-to is active

Other

• KT-23973 New compiler behavior lead to ambiguous mappings in Spring Boot temporarily reverted

1.2.40

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

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-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-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-22514 IDE Freeze related to IdeAllOpenDeclarationAttributeAltererExtension.getAnnotationFqNames()
• 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-22593 AE when invoking find usages on constructor in decompiled java file
• 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
• KT-22967 Debugger: Evaluator fails on evaluating huge lambdas on Android

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
• KT-22963 KotlinJS - When statement can cause illegal break

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. Maven

• KT-21581 kotlin.compiler.incremental not copying resources

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)

1.2.21

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

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 Support class literal annotation arguments in AnnotationSerializer

Compiler

New Features

• KT-17944 Allow ‘expect’ final member be implemented by ‘actual’ open member
• KT-21982 Recognize Checker Framework declaration annotations
• KT-17609 Intrinsic suspend val coroutineContext

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
• KT-21919 Invalid MethodParameters attribute generated for “$DefaultImpls” synthetic class with javaParameters=true
• KT-20429 False-positive ‘Unused return value of a function with lambda expression body’ in enum constant constructor
• KT-21827 SMAP problem during default lambda parameter inline

IDE

New Features

• KT-4001 Allow to set arguments indent to 1 tab (currently two and not customized)
• 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
• KT-21469 Wrap property initializers after equals sign
• 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: 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

Performance Improvements

• KT-17367 Rebuild requested for index KotlinJavaScriptMetaFileIndex
• KT-21632 Freezing on typing
• KT-21701 IDEA 2017.3 high CPU usage

Fixes

• 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-15254 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-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-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-19727 Code style: New line after ‘(’ with anonymous object or multi-line lambda unexpected behavior
• KT-19820 Strange highlightning for enum constructor
• 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-19915 TODO calls not blue highlighted in lambdas/DSLs
• KT-20096 Kotlin Gradle script: SOE after beginning of Pair definition before some script section
• KT-20314 Kotlin formatter does not respect annotations code style settings
• KT-20329 Multiplatform: gutter “Is subclassed by” should show expect subclass from the common module
• KT-20380 Configure Kotlin plugin updates dialog does not open without opened project
• 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 Improve Structure-view for Kotlin files
• KT-21214 Fix funcion selection in kotlin
• KT-21275 Don't show argument name hints in calls of methods on ‘dynamic’ type
• 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-21645 Weird parameter hint position
• KT-21733 Structure view is not updated
• KT-21756 Find Usages for “type” in ts2kt provokes exception
• KT-21770 Pasting $this into an interpolated string shouldn't escape $
• KT-21833 Type hints shown when destructing triple with type parameters
• KT-21852 Custom API version is lost when settings are reopen after restarting IDE
• 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
• KT-21702 KtLightAnnotation can't be converted to UAST
• KT-19900 IntelliJ does not recognise no-arg “invokeInitializers” set in pom.xml

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-11023 Inspection to highlight usages of Collections.sort() and replace them with .sort() method from Kotlin stdlib
• 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-21510 Add inspection to add/remove this to/from bound callable
• KT-21560 Inspection to sort modifiers
• KT-21573 Code Style Inspection: to -> Pair function used not in infix form
• 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-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-21698 Create interface shouldn't suggest to declare it inside a class which implements it
• 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
• 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
• KT-16619 Incorrect ‘accessing non-final property in constructor’ warning

IDE. Refactorings

New Features

• KT-20095 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-17212 Refactor / Inline Function: with 1 occurrence both “Inline all” and “Inline this only” are suggested
• 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-21288 Change Signature refactoring fails to change signature of overriders
• 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
• 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

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
• KT-21850 JS: support nested tests

Language design

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

Libraries

• KT-20864 Provide ReadOnly and Mutable annotations to control java collection mutability in kotlin
• KT-18789 Delegating val to out-projected MutableMap resulted in NPE due to cast to Nothing
• KT-21828 JS: The List produced by the IntArray.asList function caused weird results
• KT-21868 Eliminate potential data race in SafePublicationLazyImpl
• KT-21918 Make toTypedArray() implementation more efficient and thread-safe
• KT-22003 JS: Replace Regex constructor-like functions with secondary constructors
• JS: Volatile and Synchornized annotations are moved to kotlin.jvm package with the migration type aliases provided
• KT-16348 Provide String.toBoolean() conversion in JS and common platforms
• Add missing declarations to kotlin-stdlib-common, those that are already supported in both platforms
  • KT-21191 Add missing exception constructors to common and JS declarations
  • KT-21861 Provide NumberFormatException in common projects and make it inherit IllegalArgumentException in all platforms
  • Add missing pattern and options properties to common Regex
• KT-20968 Improve docs for String.format and String.Companion.format

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.
• 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

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
• KT-21596 Improve Kapt Gradle Plugin to be more friendly for Kotlin-DSL
• 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

Tools. Incremental Compile

• KT-20840 Multiplatform IC fails if expected or actual file is modified separately
• 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
• KT-20633 Class is not recompiled

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
• KT-21962 Source file dependencies (lookups) are not tracked in JPS when Kotlin daemon is used

Tools. Maven

• KT-20816 Repeated Maven Compiles With Kapt Fail

Tools. REPL

• 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

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”
• KT-21936 Kapt 1.2.20-eap: cannot find symbol @KaptSignature
• KT-21735 Kapt cache not cleared
• KT-22056 Applying Kapt plugin causes RuntimeException on Gradle import: “Kapt importer for generated source roots failed, source root name: debug” at KaptProjectResolverExtension.populateAndroidModuleModelIfNeeded()
• KT-22189 ISE from com.sun.tools.javac.util.Context.checkState when switching from 1.2.10 to 1.2.20-eap-33

1.2.10

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

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

1.2-RC2

Compiler

• KT-20844 VerifyError on Android after upgrading to 1.2.0-beta-88
• KT-20895 NPE in Kotlin 1.2-beta88 PseudocodeVariablesData.kt:337
• KT-21377 Create fallback flag for “Illegal smart cast is allowed after assignment in try block”

IDE

• KT-18719 Configure Kotlin in Gradle project to 1.2-Mx: add repository mavenCentral() to buildscript
• KT-20782 Exception when working with routing in ktor (non-atomic trees update)
• KT-20966 ISE: Facade class not found from Kotlin test files
• KT-20967 Kotlin plugin upgrade breaks Gradle refresh
• KT-20990 String literal in string template causes ISE
• KT-21028 Add kotlin-stdlib-jre7/8 instead of kotlin-stdlib-jdk7/8 for Kotlin versions below 1.2
• KT-21383 Unsupported method: Library.getProject() when importing Anko project
• Downgrade “use expression body” inspection to INFORMATION default level

IDE. Debugger

• KT-20962 NullPointerException because of nullable location in debugger

IDE. Inspections and Intentions

• KT-20803 Create actual declaration in the same source root as expect declaration

IDE. Refactorings

• KT-20979 Move class refactoring doesn't work anymore

Libraries

• Remove deprecated pairwise function

Tools. Gradle

• KT-21395 “Unable to load class ‘kotlin.collections.CollectionsKt’” on creating gradle project in IDEA 2016.3.7

Tools. kapt

• Add kotlin-annotation-processing-embeddable artifact (compatible with kotlin-compiler-embeddable)
• Return kotlin-annotation-processing artifact back (compatible with CLI Kotlin compiler)

1.2-RC

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.

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

1.2-Beta

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