1.3.20

Android

• KT-22571 Android: Configure Kotlin should add implementation dependency instead of compile
• KT-26341 Kotlin reference for Android Platform reports Android version instead of API Level number

Build Infrastructure

• KT-28437 Switch Kotlin to 183 platform

Compiler

New Features

• KT-14416 Support of @PolymorphicSignature in Kotlin compiler
• KT-25128 ABI jar generation in the CLI compiler for Bazel like build systems.
• KT-26165 Support VarHandle in JVM codegen
• KT-26999 Inspection for unused main parameter in Kotlin 1.3

Performance Improvements

• KT-16867 Proguard can't unbox Kotlin enums to integers
• KT-25613 Optimise boxing of inline class values inside string templates

Fixes

• KT-2680 JVM backend should generate synthetic constructors for enum entries (as javac does).
• KT-14529 JS: annotations on property accessors are not serialized
• KT-18053 Unexpected behavior with "in" infix operator and ConcurrentHashMap
• KT-18592 Compiler cannot resolve trait-based superclass of Groovy dependency
• KT-19613 "Public property exposes its private type" not reported for primary constructor properties
• KT-20344 Unused private setter created for property
• KT-23369 Internal compiler error in SMAPParser.parse
• KT-24937 Exception from parser (EA-76217)
• KT-25058 Fix deprecated API usage in RemappingClassBuilder
• KT-25288 SOE when inline class is recursive through type parameter upper bound
• KT-25295 “Couldn't transform method node” error on compiling inline class with inherited interface method call
• KT-25424 No coercion to Unit when type argument specified explicitly
• KT-25893 crossinline suspend function leads to IllegalStateException: call to 'resume' before 'invoke' with coroutine or compile error
• KT-25907 "Backend Internal error" for a nullable loop variable with explicitly declared type in a for-loop over String
• KT-25922 Back-end Internal error : Couldn't inline method : Lambda inlining : invoke(Continuation) : Trying to access skipped parameter
• KT-26366 UseExperimental with full qualified reference to marker annotation class is reported as error
• KT-26505 Improve error message on missing script base class kotlin.script.templates.standard.ScriptTemplateWithArgs
• KT-26506 Incorrect bytecode generated for inner class inside inline class referencing outer 'this'
• KT-26508 Incorrect accessor generated for private inline class method call from lambda
• KT-26509 Internal compiler error on generating inline class private method call from companion object
• KT-26554 VerifyError: Bad type on operand stack for inline class with default parameter of underlying type
• KT-26582 Array literal of a primitive wrapper class is loaded as a primitive array literal
• KT-26608 Couldn't inline method call. RuntimeException: Trying to access skipped parameter: Ljava/lang/Object;
• KT-26658 Trying to access skipped parameter exception in code with crossinline suspend lambda with suspend function with default parameter call
• KT-26715 NullPointerException for an inline class constructor reference
• KT-26848 Incorrect line in coroutine debug metadata for first suspension point
• KT-26908 Inline classes can't have a parameter with a default value (Platform declaration clash)
• KT-26931 NSME “InlineClass.foo-impl(LIFace;)I” on calling inherited method from inline class instance
• KT-26932 CCE “Foo cannot be cast to java.lang.String” when accessing underlying value of inline class through reflection
• KT-26998 Default extension fun call in generic Kotlin interface with inline class substituted type of extension receiver fails with internal compiler error
• KT-27025 Inline class access to private companion object fun fails with VerifyError
• KT-27070 Delegated property with inline class type delegate fails with internal error in codegen
• KT-27078 Inline class instance captured in closure fails with internal error (incorrect bytecode generated)
• KT-27107 JvmStatic in inline class companion doesn't generate static method in the class
• KT-27113 Inline class's toString is not called when it is used in string extrapolation
• KT-27140 Couldn't inline method call 'ByteArray' with inline class
• KT-27162 Incorrect container is generated to callable reference classes for references to inline class members
• KT-27259 "Internal error: wrong code generated" for nullable inline class with an inline class underlying type
• KT-27318 Interface implementation by delegation to inline class type delegate fails with internal error in codegen
• KT-27358 Boxed inline class type default parameter values fail with CCE at run-time
• KT-27416 "IllegalStateException: Backend Internal error" for inline class with a function with default argument value
• KT-27429 "-java-parameters" compiler argument fails in constructor when there is an inline class parameter present
• KT-27513 Backend Internal Error when using inline method inside inline class
• KT-27560 Executing getter of property with type kotlin.reflect.KSuspendFunction1 throws MalformedParameterizedTypeException
• KT-27705 Internal compiler error (incorrect bytecode generated) when inner class constructor inside inline class references inline class primary val
• KT-27706 Internal compiler error (incorrect bytecode generated) when inner class inside inline class accepts inline class parameter
• KT-27737 CCE for delegated property of inline class type
• KT-27762 The lexer crashes when a vertical tabulation is used
• KT-27774 Update asm to 7.0 in Kotlin backend
• KT-27948 Internal Error comparing UInt? to UInt
• KT-28054 Inline class: "Cannot pop operand off an empty stack" for calling private secondary constructor from companion object
• KT-28185 Incorrect behaviour of javaClass intrinsic for receivers of inline class type
• KT-28188 CCE when bound callable reference with receiver of inline class type is passed to inline function
• KT-28385 Rewrite at slice FUNCTION in MPP on "red" code
• KT-28405 VE “Bad type on operand stack” at runtime on creating inline class with UIntArray inside
• KT-28585 Inline classes not properly boxed when accessing a var (from enclosing scope) from lambda
• KT-6574 Enum entry classes should be compiled to package private classes
• KT-20358 Map.getOrDefault is available in Android, but it shouldn't
• KT-23543 Back-end (JVM) Internal error: Couldn't inline method
• KT-24156 For-loop optimization should not be applied in case of custom iterator
• KT-24780 Recursive suspend local functions: "Expected an object reference, but found ."
• KT-26149 No report about use contracts in not top-level functions or lambdas
• KT-26186 External contract builder is not supported
• KT-28237 CoroutineStackFrame uses slashes instead of dots in FQN

IDE

New Features

• KT-25906 Kotlin language injection doesn't evaluate constants in string templates
• KT-27461 Provide live template to generate main() with no parameters
• KT-28371 Automatically align ?: (elvis operator) after call on the new line

Performance Improvements

• KT-23738 Provide stubs for annotation value argument list
• KT-25410 Opening Settings freezes the UI for 23 seconds
• KT-28755 Optimize searching constructor delegation calls
• KT-27832 Improve performance of KotlinGradleProjectResolverExtension

Fixes

• KT-9840 Right parenthesis doesn't appear after class name before the colon
• KT-17502 Do not disable "Generate equals and hashCode" actions for data classes
• KT-26868 MPP: Gradle import: test dependencies get Compile scope
• KT-26987 "Extend Selection" is missing for labeled return
• KT-27095 Kotlin configuration: update EAP repositories to use https instead of http
• KT-27321 Cannot init component state if "internalArguments" presents in xml project structure (kotlinc.xml)
• KT-27375 Kotlin Gradle DSL script: "Unable to get Gradle home directory" in new project with new Gradle wrapper
• KT-27380 KotlinStringLiteralTextEscaper returns wrong offset on unparseable elements
• KT-27491 MPP JVM/JS wizard: Use Ktor in the skeleton
• KT-27492 Create some MPP wizard tests
• KT-27530 Kotlin Gradle plugin overwrites the JDK set by jdkName property of the Gradle Idea plugin
• KT-27663 Uast: don't store resolved descriptors in UElements
• KT-27954 Generate -> toString() using "Multiple templates with concatenation" should add spaces after commas
• KT-28348 Don't log or wrap ProcessCanceledException
• KT-28401 Show parameter info for lambdas during completion
• KT-28402 Automatically indent || and && operators
• KT-28458 New Project Wizard: move multiplatform projects to the new DSL
• KT-28513 Bad Kotlin configuration when old syntax is used for configured Gradle project with >= 4.4 version
• KT-18807 Complete Current Statement doesn't work in function call
• KT-26246 JPS instead of Gradle run configuration is generated for a new MPP model
• KT-26247 Unable to run/debug platform code in a new MPP model: incorrect run configuration generated
• KT-28289 "Extend selection" doesn't select blank line after method in class
• KT-28556 Wrong nullability for @JvmOverloads-generated method parameter in light classes

IDE. Android

• KT-25450 NoClassDefFoundError when trying to run a scratch file in Android Studio 3.1.3, Kotlin 1.2.51
• KT-26764 kotlin content root isn't generated for Android module of a multiplatform project on Gradle import
• KT-23560 Scratch: impossible to run scratch file from Android Studio

IDE. Code Style, Formatting

• KT-24496 IntelliJ IDEA: Formatting around addition / subtraction not correct for Kotlin
• KT-27847 Destructured declaration continued on the next line is formatted with double indent
• KT-28227 Formatter should not allow enum entries to be on one line with opening brace
• KT-28070 Code style: "Align when multiline" option for "extends / implements list" changes formating of enum constants constructor parameters
• KT-28484 Bad formatting for assignment when continuation for assignments is disabled

IDE. Completion

• KT-18089 Completion for nullable types without safe call rendered in gray color is barely visible
• KT-20706 KDoc: Unneeded completion is invoked after typing a number/digit in a kdoc comment
• KT-22579 Smart completion should present enum constants with higher rank
• KT-23834 Code completion and auto import do not suggest extension that differs from member only in type parameter
• KT-25312 Autocomplete for overridden members in expected class inserts extra override word
• KT-26632 Completion: "data class" instead of "data"
• KT-18582 MPP: show only actual elements in completion list if both actual and expect versions exist
• KT-27916 Autocomplete val when auto-completing const

IDE. Debugger

Fixes

• KT-13268 Can't quick evaluate expression with Alt + Click without get operator
• KT-14075 Debugger: Property syntax accesses private Java field rather than synthetic property accessor
• KT-22366 Debugger doesn't stop on certain expressions
• KT-24343 Debugger, Step Over: IllegalStateException on two consecutive breakpoints when first breakpoint is on an inline function call
• KT-24959 Evaluating my breakpoint condition fails with exception
• KT-25667 Exception in logs from WeakBytecodeDebugInfoStorage (NoStrataPositionManagerHelper)
• KT-26795 Debugger crashes with NullPointerException when evaluating const value in companion object
• KT-26798 Check that step into works with overrides in inline classes
• KT-27414 Use "toString" to render values of inline classes in debugger
• KT-28342 Can't evaluate the synthetic 'field' variable
• KT-28487 ISE “resultValue is null: cannot find method generated_for_debugger_fun” on evaluating value of inline class
• KT-23585 Evaluation of a static interface method call fails
• KT-28028 IDEA is unable to find sources during debugging

IDE. Decompiler

• KT-27284 Disable highlighting in decompiled Kotlin bytecode
• KT-27460 "Show Kotlin bytecode": "Internal error: null" for an inline extension property from a different file

IDE. Gradle. Script

• KT-14862 IDEA links to class file instead of source in buildSrc (Gradle/Kotlin script)
• KT-17231 "Optimize Import" action not working for Gradle script kotlin.
• KT-21981 Optimize imports on the fly does not take implicit imports into account in .kts files
• KT-24623 Class defined in gradle buildSrc folder is marked as unused when it is actually used in Gradle Script Kotlin file
• KT-24705 Script reports are shown in the editor only after caret move
• KT-24706 Do not attach script reports if 'reload dependencies' isn't pressed
• KT-25354 Gradle Kotlin-DSL: Changes of buildSrc are not visible from other modules
• KT-25619 Intentions not working in buildSrc (Gradle)
• KT-27674 Highlighting is skipped in files from buildSrc folder of Gradle project

IDE. Folding

• KT-4551 Fold/Unfold safe access operators

IDE. Hints

• KT-13118 Parameter info is not shown for Kotlin last-argument lambdas
• KT-27802 The hint for the if-expression is duplicated inside each branch
• KT-26689 Lambda return expression hint not shown when returning a lambda from inside a lambda

IDE. Inspections and Intentions

New Features

• KT-2029 Add inspection for boolean literals passed without using named parameters feature
• KT-5071 Properly surround a function invocation in string template by curly braces
• KT-5187 Quick Fix to remove inline keyword on warning about performance benefits
• KT-6025 Auto-remove toString() call in "Convert concatenation to template"
• KT-9983 "'inline'' modifier is not allowed on virtual members." should have quickfix
• KT-12743 Add Intention to convert nullable var to non-nullable lateinit
• KT-15525 Inspection to warn on thread-blocking invocations from coroutines
• KT-17004 There is no suggestion to add property to supertype
• KT-19668 Inspection "Redundant else in if"
• KT-20273 Inspection to report a setter of a property with a backing field that doesn't update the backing field
• KT-20626 Inspection for '+= creates a new list under the hood'
• KT-23691 Warn about var properties with default setter and getter that doesn't reference backing field
• KT-25171 Inspection: Change indexed access operator on maps to Map.getValue
• KT-25620 Inspection for functions returning Deferred
• KT-25718 Add intention to convert SAM lambda to anonymous object
• KT-26236 QuickFix for ASSIGN_OPERATOR_AMBIGUITY on mutable collection '+=', '-='
• KT-26511 Inspection (without highlighting by default) for unlabeled return inside lambda
• KT-26653 Intention to replace if-else with x?.let { ... } ?: ...
• KT-26724 Inspection with a warning for implementation by delegation to a var property
• KT-27007 Intention: add label to return if scope is visually ambiguous
• KT-27075 Add a quick fix/intention to create expect member for an added actual declaration
• KT-27445 Add quickfix for compiler warning "DEPRECATED_JAVA_ANNOTATION"
• KT-28118 Remove empty parentheses for annotation entries
• KT-28631 Suggest to remove single lambda argument if its name is equal to it
• KT-28696 Inspection: detect potentially ambiguous usage of coroutineContext
• KT-4557 Convert between named functions and their calls by conventions
• KT-24515 Intention to add an exception under the cursor to @Throws annotations

Performance Improvements

• KT-26969 ConvertCallChainIntoSequence quick fix doesn't use sequences all the way

Fixes

• KT-4645 Unexpected behevior of "Replace 'if' with 'when'" intention when called on second or third 'if'
• KT-5088 "Add else branch" quickfix on when should not add braces
• KT-7555 Omit braces when converting 'this' in 'Convert concatenation to template'
• KT-8820 No "Change type" quick fix inside when
• KT-8875 "Remove explicit type" produce red code for extension lambda
• KT-12479 IDEA doesn't propose to replace all usages of deprecated annotation when it declared w/o parentheses
• KT-13311 IDE marks fun finalize() as unused and says that its effective visibility is private
• KT-14555 Strange 'iterate over Nothing' intention
• KT-15550 Intention "Add names to call arguments" isn't available if one argument is a generic function call
• KT-15835 "Leaking 'this' in constructor" for enum class
• KT-16338 "Leaking 'this' in constructor" of non-final class when using 'this::class.java'
• KT-20040 Kotlin Gradle script: unused import doesn't become grey
• KT-21520 "Assignment should be lifted out of 'if'" false positive for arguments of different types
• KT-23134 "Remove single lambda parameter" quick fix applied to a lambda parameter with explicit type breaks ::invoke reference on lambda
• KT-23512 "Remove redundant receiver" quick fix makes generic function call incompilable when type could be inferred from removed receiver only
• KT-23639 False positive "Unused symbol" for sealed class type parameters
• KT-23693 Add missing actual members quick fix doesn't work if there is already same-named function with the same signature
• KT-23744 "Kotlin library and Gradle plugin versions are different" inspection false positive for non-JVM dependencies
• KT-24492 "Call on collection type may be reduced" does not change labels from mapNotNull to map
• KT-25536 Use non-const Kotlin 'val' usage in Java code isn't reported on case labels (& assignments)
• KT-25933 ReplaceCallWithBinaryOperator should not suggest to replace 'equals' involving floating-point types
• KT-25953 Meaningless auto properties for Atomic classes
• KT-25995 "Simplify comparision" should try to apply "Simplify if expression" when necessary
• KT-26051 False positive "Redundant visibility modifier" for overridden protected property setter made public
• KT-26337 Exception (resource not found) in quick-fix tests in AS32
• KT-26571 Too much highlighting from "convert call chain into sequence"
• KT-26650 False negative "Call chain on collection should be converted into 'Sequence'"" on class implementing Iterable
• KT-26662 Corner cases around 'this' inside "replace if with safe access"
• KT-26669 "Remove unnecessary parentheses" reports parens of function returned from extension function
• KT-26673 "Remove parameter" quick fix keeps unused type parameter referred in type constraint
• KT-26710 Should not report "implicit 'it' is shadowed" when outer it is not used
• KT-26839 Add braces to if statement produces code that is not formatted according to style
• KT-26902 Bad quickfix name for "Call on non-null type may be reduced"
• KT-27016 Replace 'if' with elvis operator w/ interface generates invalid code (breaks type inference)
• KT-27034 "Redundant SAM constructor" inspection shouldn't make all lambda gray (too much highlighting)
• KT-27061 False positive "Convert to secondary constructor" with delegation
• KT-27071 "Add non-null asserted (!!) call" places !! at wrong position with operator get (array indexing)
• KT-27093 Create actual class from expect class doesn't add all necessary imports
• KT-27104 False positive "Convert call chain into Sequence" with groupingBy
• KT-27116 "Object literal can be converted to lambda" produces code littered with "return@label"
• KT-27138 Change visibility intentions are suggested on properties marked with @JvmField
• KT-27139 Add getter intention is suggested for properties marked with @JvmField
• KT-27146 False positive "map.put() can be converted to assignment" on super keyword with LinkedHashMap inheritance
• KT-27156 Introduce backing property intention is suggested for property marked with @JvmField
• KT-27157 Convert property to function intention is suggested for property marked with @JvmField
• KT-27173 "Lift return out of ..." should work on any of targeted return keywords
• KT-27184 "Replace with safe call" is not suggested for nullable var property that is impossible to smart cast
• KT-27209 "Loop parameter 'it' is unused": unhelpful quickfix
• KT-27291 "Create" quick fix: "destination directory" field suggests same root and JVM roots for all platforms
• KT-27354 False positive "Make 'Foo' open" for data class inheritance
• KT-27408 "Add braces to 'if' statement" moves end-of-line comment inside an if branch
• KT-27486 ConvertCallChainIntoSequence quick fix doesn't convert 'unzip' into 'Sequence'
• KT-27539 False positive Redundant Companion reference when val in companion is effectively shadowed by inherited val
• KT-27584 False positive "Move lambda argument out of parentheses" when implementing interface by delegation
• KT-27664 Fix flaky problem in tests "Could not initialize class UnusedSymbolInspection"
• KT-27699 "Remove redundant spread operator" produces incorrect code
• KT-27708 IDE highlights internal constructors used only from Java as unused
• KT-27791 Don't suggest Implement as constructor parameters quick fix for actual class declaration
• KT-27861 RedundantCompanionReference false positive for nested class with name "Companion"
• KT-27906 SafeCastAndReturn is not reported on code block with unqualified return
• KT-27951 False declaration in actual list (same name but not really actual)
• KT-28047 False positive "Redundant lambda arrow" for lambda returned from when branch
• KT-28196 KotlinAddImportAction: AWT events are not allowed inside write action
• KT-28200 KNPE in TypeUtilsKt.getDataFlowAwareTypes
• KT-28268 Don't suggest "make abstract" quick fix for inline classes
• KT-28286 "Unused symbol" inspection: Interface is reported as "class"
• KT-28341 False positive "Introduce backing property" intention for const values
• KT-28381 Forbid "move property to constructor" for expect classes
• KT-28382 Forbid "introduce backing property" for expect classes
• KT-28383 Exception during "move to companion" for expect class member
• KT-28443 "Move out of companion object" intention is suggested for @JvmField property inside companion object of interface
• KT-28504 Redundant async inspection: support calls on explicitly given scope
• KT-28540 "Replace assert boolean with assert equality" inspection quickfix doesn't add import statement
• KT-28618 Kotlin: convert anonymous function to lambda expression failed if no space at start of lambda expression
• KT-28694 "Assign backing field" quick fix adds empty line before created assignment
• KT-28716 KotlinDefaultHighlightingSettingsProvider suppresses inspections in non-kotlin files
• KT-20725 Cannot persist excluded methods for inspection "Accessor call that can be replaced with property syntax"

IDE. KDoc

• KT-24788 Endless exceptions in offline inspections

IDE. Multiplatform

• KT-26518 Create actual ... quick fix doesn't add a primary constructor call for the actual secondary constructor
• KT-26957 Merge expect gutter icon, when used for the same line
• KT-27335 New multiplatform wizard: mobile library is generated with failed test
• KT-27595 KNPE on attempt to generate equals(), hashCode(), toString() for expect class

IDE. Navigation

• KT-27494 Create tooling tests for new-multiplatform
• KT-28206 Go to implementations on expect enum shows not only enum classes, but also all members
• KT-28398 Broken navigation to actual declaration of println() in non-gradle project

IDE. Project View

• KT-26210 IOE “Cannot create file” on creating new file with existing filename by pasting a code in Project view
• KT-27903 Can create file with empty name without any warning

IDE. Refactorings

• KT-23603 Add the support for find usages/refactoring of the buildSrc sources in gradle kotlin DSL build scripts
• KT-26696 Copy, Move: "Destination directory" field does not allow to choose a path from non-JVM module
• KT-28408 "Extract interface" action should not show private properties
• KT-28476 Extract interface / super class on non-JVM class throws KNPE

IDE. Scratch

• KT-25032 Scratch: IDEA hangs/freezes on code that never returns (infinite loops)
• KT-26271 Scratches for Kotlin do not work when clicking "Run Scratch File" button
• KT-26332 Fix classpath intention in Kotlin scratch file in Java only project doesn't do anything
• KT-27628 Scratch blocks AWT Queue thread
• KT-23523 Filter out fake gradle modules from checkbox in Scratch file panel

IDE. Script

• KT-24465 Provide a UI to manage script definitions
• KT-24466 Add warning when there are multiple script definitions for one script
• KT-26331 Please extract ScriptDefinitionContributor/KotlinScriptDefinition from kotlin-plugin.jar to separate jar
• KT-27669 Consider moving expensive tasks out of the UI thread
• KT-27743 Do not start multiple background threads loading dependencies for different scripts
• KT-27817 Implement a lightweight EP in a separate public jar for supplying script definitions to IDEA
• KT-28046 "Reload script dependencies on file change" option is missing after project restart
• KT-20762 Kotlin script run configuration: support "Use classpath of module" attribute

IDE. Tests Support

• KT-27977 Missing 'run' gutter on a test method of an abstract class
• KT-28080 Wrong run configuration created from context for test method in abstract class
• KT-25101 Common tests cannot be run from IDE without manually editing run configuration

JS. Tools

• KT-27249 Support kotlin-frontend-plugin with the new kotlin-multiplatform plugin

JavaScript

• KT-27611 Calling a suspending function of a JS library causes "Uncaught ReferenceError: CoroutineImpl is not defined"
• KT-28215 JS: inline suspend function not usable in non-inlined form
• KT-25003 Invalid reference to COROUTINE_SUSPENDED is generated in JS
• KT-26706 JS incorrect Long value in string templates
• KT-28207 Finally block loops forever for specific code shape

Libraries

• KT-18398 Provide a way for libraries to avoid mixing Kotlin 1.0 and 1.1 dependencies in end user projects
• KT-20865 Retrieving groups by name is not supported on Java 9 even with kotlin-stdlib-jre8 in the classpath
• KT-25371 Support unsigned integers in kotlinx-metadata-jvm
• KT-27251 Do not use Stack in FileTreeWalk iterator implementation
• KT-27629 kotlin.test BeforeTest/AfterTest annotation mapping for TestNG
• KT-27919 Publish modularized artifacts under 'modular' classifier
• KT-28091 Provide correct AbstractMutableCollections declarations in stdlib-common
• KT-28251 Stdlib: Deprecated ReplaceWith kotlin.math.log replacement instead of kotlin.math.ln
• KT-28488 Add clarification for COROUTINES_SUSPENDED documentation
• KT-28572 readLine() stumbles at surrogate pairs
• KT-28088 NoSuchMethodException: javafx.application.Platform.startup with new kotlinx-coroutines-javafx:1.0.1

Reflection

• KT-26765 Support calling constructors with inline classes in the signature in reflection
• KT-27585 Flaky IllegalPropertyDelegateAccessException: Cannot obtain the delegate of a non-accessible property. Use "isAccessible = true" to make the property accessible
• KT-27598 "KotlinReflectionInternalError" when using callBy on constructor that has inline class parameters
• KT-27913 ReflectJvmMapping.getKotlinFunction(ctor) works incorrectly with types containing variables of inline class

Tools. CLI

• KT-27226 Argfiles: An empty argument in quotes with a whitespace or a newline after it interrupts further reading of arguments
• KT-27430 [Experimental API] Report warning instead of error if non-marker is used in -Xuse-experimental/-Xexperimental
• KT-27626 -Xmodule-path does not work in Gradle project with Java 9
• KT-27709 Using an experimental API that does not exist should warn, not error
• KT-27775 Re-enable directories passed as in -Xbuild-file
• KT-27930 Do not use toURI in ModuleVisibilityUtilsKt.isContainedByCompiledPartOfOurModule if possible
• KT-28180 Backslash-separated file paths in argfiles do not work on Windows

Tools. Compiler Plugins

• KT-24997 Pass arguments to Kapt in human-readable format
• KT-24998 Introduce separate command line tool specifically for Kapt in order to improve UX

Tools. Gradle

New Features

• KT-26963 Warn user that a custom platform-agnostic source set wouldn't be included into build unless it is required for other source sets
• KT-28155 Add ability to run tasks in parallel within project

Performance Improvements

• KT-24530 Enable compile avoidance for kaptKotlin tasks

Fixes

• KT-26065 Kotlin Gradle plugin resolves dependencies at configuration time
• KT-26389 Support Gradle Kotlin DSL in projects with the kotlin-multiplatform plugin
• KT-26663 Gradle dependency DSL features missing for the new MPP dependencies
• KT-27682 Kotlin MPP DSL: a target is missing the attributes { ... } function, only the attributes property is available.
• KT-27950 Gradle 5.0-rc1: "Compilation with Kotlin compile daemon was not successful"
• KT-28363 Enable resources processing for Kotlin/JS target in multiplatform projects
• KT-28520 MPP plugin can't be applied altogether with the "maven-publish" plugin in a Gradle 5 build
• KT-28635 fromPreset() in MPP Gradle plugin DSL is hard to use from Gradle Kotlin DSL scripts
• KT-26498 NCDFE org.jetbrains.kotlin.gradle.plugin.KotlinSourceSet after refreshing Gradle project with ktlint plugin
• KT-26688 Build fails on compilation of a simple native module in a project with a new multiplatform model
• KT-26854 MPP/Native: Can't use 'NativeOutputKind.FRAMEWORK' in build.gradle
• KT-26978 Gradle verification fails on DiscoverScriptExtensionsTask
• KT-27231 Exception thrown while executing model rule: PublishingPlugin.Rules#publishing(ExtensionContainer) on usage of 'maven-publish' plugin with Kotlin/Native generated project
• KT-27685 In new MPP, expose a compilation's default source set via DSL

Tools. J2K

• KT-26073 Irrelevant "create extra commit with java->kt rename"

Tools. JPS

• KT-26980 JPS Native warning is duplicated for test source sets
• KT-27285 MPP: invalid common -> platform dependency: JPS fails with Throwable "Cannot initialize Kotlin context: Cyclically dependent modules" at KotlinChunk.()
• KT-27622 JPS, JS: Resources marked as "kotlin-resource" are not copied to the out folder in a Kotlin-js project
• KT-28095 JPS: support -Xcommon-sources for multiplatform projects (JS)
• KT-28316 Report Native is not yet supported in IDEA internal build system on JPS build once per project/multiplatform module
• KT-28527 JPS: Serialization plugin not loaded in ktor
• KT-26648 Native modules of a multiplatform project wouldn't be built through JPS build

Tools. Scripts

• KT-27382 Embeddable version of scripting support (KEEP 75)
• KT-27497 kotlin script - No class roots are found in the JDK path

Tools. kapt

• KT-24368 Kapt: Do not include compile classpath entries in the annotation processing classpath
• KT-25756 Investigate file descriptors leaks in kapt
• KT-26145 Using kapt without the kotlin-kapt plugin should throw a build error
• KT-26725 Kapt does not handle androidx.annotation.RecentlyNullable correctly
• KT-26817 kapt 1.2.60+ ignores .java files that are symlinks
• KT-27188 kapt Gradle plugin fails in Java 10+ ("Cannot find tools.jar")
• KT-27334 [Kapt] Stub generator uses constant value in method annotation instead of constant name.
• KT-27404 Kapt does not call annotation processors on custom (e.g., androidTest) source sets if all dependencies are inherited from the main kapt configuration
• KT-28025 Detect memory leaks in annotation processors