Changelog

Analysis API

• KT-55510 K2: Lost designation for local classes
• KT-55191 AA: add an API to compare symbol pointers
• KT-55487 K2: symbol pointer restoring doesn't work for static members
• KT-55336 K2 IDE: "java.lang.IllegalStateException: Required value was null." exception while importing a compiled JPS project
• KT-55098 AA: KtDeclarationRenderer should render a context receivers
• KT-51181 LL API: errors for SAM with suspend function from another module
• KT-50250 Analysis API: Implement Analysis API of KtExpression.isUsedAsExpression
• KT-54360 KtPropertySymbol: support JvmField in javaSetterName and javaGetterName

Analysis API. FE1.0

• KT-55825 AA FE1.0: stackoverflow when resolution to a function with a recursive type parameter

Analysis API. FIR

• KT-54311 K2: proper implementation of KtSymbolPointer
• KT-50238 Analysis API: Implement KSymbolPointer for KtSymbol

Analysis API. FIR Low Level API

• KT-52160 FIR: Substitution overrides on FirValueParameter-s are incorrectly unwrapped
• KT-55566 LL FIR: Tests in compiler/testData/diagnostics/tests/testsWithJava17 fail under LL FIR
• KT-55339 LL FIR: Missing RECURSIVE_TYPEALIAS_EXPANSION error in function type alias
• KT-55327 LL FIR: Diverging UNRESOLVED_REFERENCE errors in recursive local function test
• KT-54826 KtSymbolPointer: migrate from IdSignature to our own solution

Android

• KT-54464 MPP, Android SSL2: Add a flag for suppressing warning in case of using Android Style folders

Backend. Wasm

• KT-38924 Wasm support in nodejs
• KT-56160 Getting WebAssembly.CompileError in browsers not supported GC and other required proposals
• KT-46773 Implement an experimental version of the Kotlin/Wasm compiler backend
• KT-56584 K/Wasm: Can't link symbol class
• KT-56166 Fix compatibility with Firefox Nightly
• KT-55589 Basic support of WASI
• KT-53790 Reading from "node:module" is not handled by plugins error with Kotlin/Wasm 1.7.20-Beta

Compiler

New Features

• KT-54535 Implement custom equals and hashCode for value classes in Kotlin/JVM
• KT-55949 Release experimental @Volatile support in native
• KT-44698 Frontend (K2): print file name/line on compiler crash/exception
• KT-54666 K2: Allow to skip specifying type arguments for members from raw type scope
• KT-54524 Implement Java synthetic property references in compiler
• KT-54024 K2: support -Xlink-via-signatures mode

Performance Improvements

• KT-33722 JVM: Result API causes unnecessary boxing
• KT-53330 Optimize for-loops and contains over open-ended ranges with until operator (..<) for all backends
• KT-54415 JVM BE: performance loss related to multi-field inline class lowering
• KT-48759 Infix compareTo boxes inline classes
• KT-55033 Make org.jetbrains.kotlin.resolve.calls.inference.model.NewConstraintSystemImpl#runTransaction an inline function
• KT-54501 Improve code generation for inline classes with custom equals

Fixes

• KT-56965 K/N: linkDebugFrameworkIosArm64 tasks failing with UnsupportedOperationException: VAR name:disposables type:com.badoo.reaktive.disposable.CompositeDisposable [val]
• KT-56611 Native: new native caches are broken when KONAN_DATA_DIR is defined to a directory inside ~/.gradle
• KT-55251 Enum.entries compilation error should be more specific
• KT-56527 K2: "AssertionError: Assertion failed" during compilation in SequentialFilePositionFinder
• KT-56526 InvalidProtocolBufferException on reading module metadata compiled by K2 in 1.8.20
• KT-57388 Kapt+JVM_IR: "RuntimeException: No type for expression" for delegated property
• KT-53153 Synthetic Enum.entries can be shadowed by user-defined declarations
• KT-51290 "AssertionError: Parameter indices mismatch at context" with context receivers
• KT-57242 Equals behaviour for value classes implementing interfaces is different between 1.8.10 and 1.8.20-RC
• KT-57261 "IllegalArgumentException was thrown at: MemoizedInlineClassReplacements.getSpecializedEqualsMethod" when comparing non-inline class instance with an inline class instance
• KT-57107 Handling of Windows line endings CRLF broken in latest snapshot with K2
• KT-57117 K2: Compiler reports invalid columns in diagnostics in case of crlf line endings
• KT-56500 The type parameter TYPE_PARAMETER name:E index:0 variance: superTypes:[kotlin.Any?] reified:false is not defined in the referenced function FUN LOCAL_FUNCTION_FOR_LAMBDA
• KT-56258 VerifyError: Bad local variable type when using -Xdebug
• KT-54455 Unexpected result of equality comparison of inline class objects
• KT-56251 Generic Java synthetic property references don't work in K2
• KT-55886 K2: Wrong code location mapping with Windows line endings
• KT-43296 FIR: Complicated interaction between smart cast and inference leads to false-positive diagnostic
• KT-57053 Problem around anonymous objects in inline functions
• KT-54950 NoSuchMethodError on calling 'addAll' on inline class implementing mutable list
• KT-56815 compileKotlin task is stuck with while(true) and suspend function
• KT-56847 Unresolved reference to Java annotation in Kotlin class with the same name packages
• KT-52459 Context receivers: AbstractMethodError caused by Interface method with both an extension and a context receiver is overriden incorrectly in subclasses
• KT-56215 JVM: Object extension function nullable receiver null check false negative when object is null
• KT-56188 K/N: AssertionError when casting SAM wrapper with generic type parameter
• KT-56033 Restore 'isMostPreciseContravariantArgument' function signature for compatibility
• KT-56407 Backend Internal error: Exception during IR lowering during :daemon-common-new:compileKotlin
• KT-55887 K2. "IllegalStateException: org.jetbrains.kotlin.ir.expressions.impl.IrErrorCallExpressionImpl is not expected" on adding kotlin.plugin.jpa
• KT-56701 K2 (with LightTree) reports syntax errors without additional information
• KT-56649 K2 uses 0-index for line numbers rather than 1-index
• KT-54807 K2. Support @OnlyInputTypes diagnostic checks (contains like calls)
• KT-51247 "AssertionError: org.jetbrains.kotlin.ir.expressions.impl.IrFunctionReferenceImpl" caused by context receiver functional types
• KT-55436 K1: implement warning about shadowing of the derived property by the base class field
• KT-56521 Static scope initializers sometimes not called when first accessed from interop
• KT-49182 Strange cast from Unit to String
• KT-55288 False negative WRONG_ANNOTATION_TARGET on type under a nullability qualifier
• KT-33132 Cannot override the equals operator twice (in a class and its subclass) unless omitting the operator keyword in the subclass
• KT-56061 K1 does not report error on inconsistent synthetic property assignment
• KT-55483 K2: Fir is not initialized for FirRegularClassSymbol java/lang/invoke/LambdaMetafactory
• KT-55125 Difference in generated bytecode for open suspend functions of generic classes
• KT-54140 SOE at IrBasedDescriptorsKt.makeKotlinType with mixing recursive definitely not nullable type with nullability
• KT-56224 Clarify message "Secondary constructors with bodies are reserved for for future releases" for secondary constructors in value classes with bodies
• KT-54662 K2: Assign operator ambiguity on synthetic property from java
• KT-54507 K2: Wrong implicitModality for interface in FirHelpers
• KT-55912 "UnsupportedOperationException: Unsupported const element type kotlin.Any" caused by kotlin fqn in annotation
• KT-56018 [K2/N] Fir2Ir does not take value parameters annotations from FIR to IR
• KT-56091 [K2/N] Fix various property annotations
• KT-54209 K2: false positive deprecation on a class literal with deprecated companion
• KT-55977 [K2/N] Suspend function reference type is wrongly serialized to klib
• KT-55493 K2: False-negative VAL_REASSIGNMENT
• KT-55372 K2: false-negative INVISIBLE_MEMBER for call of static method of package-private Java grandparent class
• KT-55371 K2: compiled code fails trying to call static method of package-private Java grandparent class
• KT-55408 K2: can't access indirectly inherited from a package-private class Java members through a type alias
• KT-55116 K2: store static qualifiers in dispatch receiver field
• KT-55996 K2: cannot switch the light tree mode off with -Xuse-fir-lt=false
• KT-55368 K2/MPP: Metadata compiler
• KT-54305 K1: implement warning "synthetic setter projected out"
• KT-52027 "NullPointerException" when using context receivers with inline fun
• KT-55984 Stack allocated array is not cleaned between loop iterations
• KT-52593 Provide Alpha support for JS in the K2 platform
• KT-54656 NoSuchMethodError on invoking Java constructor which takes an inline value class as a parameter
• KT-56015 Remove unnecessary stack traces for special checks for ObjC interop
• KT-55606 K2. Infix operator "in" works on ConcurrentHashMap when it's declared through another class
• KT-53884 K2: "IllegalStateException: Fir is not initialized for FirRegularClassSymbol com/appodeal/consent/Consent.a" when importing this class
• KT-54502 Synthetic extensions on raw types work differently from regular getter calls
• KT-49351 FIR: Raw type scopes are unsupported
• KT-49345 FIR: Properly support raw types in type parameter upper bounds
• KT-55733 K2. Reference resolve works incorrectly for classes declared through typealias
• KT-46369 FIR: Investigate raw types for arrays
• KT-41794 [FIR] Implement raw type based scope
• KT-55181 K2. No compilation error on throwing not throwable
• KT-55398 Kotlin inline nested inline lambda's inline variable will inline not correctly
• KT-55359 K2. No error when secondary constructor does not delegate to primary one
• KT-55759 K2: Unresolved reference of serializer if library linking is used (with kotlinx.serialization plugin)
• KT-54705 Kotlin scripting doesn't support files with UTF-8 BOM
• KT-51753 FIR: various errors due to expect/actual mapping absence in translator
• KT-44515 FIR DFA: extract non-null info from anonymous object's initialization
• KT-55018 K2 / serialization: FIR2IR fails on local companion
• KT-55284 Refactor org.jetbrains.kotlin.diagnostics.KtDiagnosticReportContextHelpersKt#reportOn(...)
• KT-55693 K2. Type inference changed in k2
• KT-54742 K2: lambda with conditional bare return inferred to return Any, not Unit
• KT-54332 Add deprecation warning for false-negative TYPE_MISMATCH for KT-49404
• KT-55509 Invisible fake overrides are listed among lazy IR class members
• KT-55597 K2. This type has a constructor, and thus must be initialized here error is missed for anonymous object inherits class with no-arg constructor
• KT-54357 "ClassCastException: class org.jetbrains.kotlin.resolve.scopes.receivers.ExtensionReceiver cannot be cast to class org.jetbrains.kotlin.resolve.scopes.receivers.ContextClassReceiver" with anonymous object extending a class with a context receiver
• KT-51397 "VerifyError: Bad type on operand stack" with context receivers
• KT-54905 KLIB check on compiled with pre-release version
• KT-55615 K2 often does not expand type aliases in annotation position
• KT-54522 K2: ambiguity between operator candidates on += (plusAssign) to reassigned var of MutableList type
• KT-54300 K2: No "Projections are not allowed for immediate arguments of a supertype" for projection in supertypes of an anonymous object
• KT-55495 K2: support lateinit intrinsic applicability checker
• KT-55494 MPP. Error when building for native: Compilation failed: Global 'kclass:io.ktor.serialization.$deserializeCOROUTINE$0' already exists
• KT-54980 K2: Explicit type arguments in calls with the wrong number of type arguments are not resolved
• KT-54730 K2: type aliases to generic functional interfaces attempt to re-infer explicitly specified type parameters
• KT-55611 IC / MPP: Optional internal annotations are not visible on incremental builds
• KT-55324 K2: ControlFlowGraphBuilder fails with index out of bounds exception
• KT-55656 K2: PRIMARY_CONSTRUCTOR_DELEGATION_CALL_EXPECTED being a warning causes a NPE in runtime
• KT-51277 "NoSuchElementException: Collection contains no element matching the predicate" with context receivers and star projection
• KT-52791 Class with multiple context receivers fails -Xvalidate-ir with "Validation failed in file"
• KT-55071 Shared Native Compilation: Calls from intermediate common source set cannot use default parameters declared in expect common functions
• KT-52193 Native: Unable to call primary constructor with default values in an actual class without passing the values, in nativeMain source set
• KT-54573 K2: untouched implicit types in delegated constructor call of data class with @JvmRecord
• KT-55037 Support jspecify annotations moved to the new package org.jspecify.annotations in jspecify 0.3
• KT-48989 JVM / IR: "IllegalStateException: Bad exception handler end" when first parameter of inline function is nullable with "try/catch/finally" default value and second parameter tries to call toString() on the first
• KT-55231 K2: Contract declarations are not passed to checkers
• KT-54411 False positive: INFERRED_TYPE_VARIABLE_INTO_POSSIBLE_EMPTY_INTERSECTION on kotlinx.coroutines code
• KT-55005 Inconsistent behavior of array set operation in Kotlin 1.7.21
• KT-44625 Property backing/delegate field annotations are not serialized/deserialized for non-JVM targets
• KT-42490 Receiver annotations are not serialized/deserialized for non-JVM targets
• KT-53441 K2: cannot access static method of package-private Java grandparent class
• KT-54197 [K2] Exception from inliner for inline function with context receiver
• KT-55246 Disable 'CustomEqualsInValueClasses' feature in 1.9 language version
• KT-55247 Disable 'InlineLateinit' feature in 1.9 language version
• KT-53957 K2 and -Xlambdas=indy: LambdaConversionException on reference to method with both context and extension receivers
• KT-55421 K2: get rid of potentially redundant call of preCacheBuiltinClassMembers from getIrClassSymbol
• KT-52815 Compiler option -Xjdk-release fails to compile mixed projects
• KT-52236 Different modality in psi and fir
• KT-54921 K2: cannot access static field of package-private Java parent class
• KT-53698 K2: FIR2IR fails on call of inivisble extension function with Suppress
• KT-53920 K2: "NoSuchElementException: Key org.jetbrains.kotlin.fir.resolve.dfa.cfg.ClassExitNode@ef115ab is missing in the map" with unreachable code and anonymous object
• KT-55358 INTEGER_OPERATOR_RESOLVE_WILL_CHANGE is not reported in return positions of functions
• KT-51475 "ArrayIndexOutOfBoundsException: Index 4 out of bounds for length 4" with context(Any) on inline function with contract
• KT-51951 "IllegalStateException: No receiver" caused by implicit invoke on typealias context receiver
• KT-52373 Context receivers: ClassCastException: function with dispatch, context, and extension receivers produces this when a parameter's default is included
• KT-54220 K2: compiler fails on compiling plus expression on unsigned int
• KT-54692 K2: compiler fails on compiling unsigned shifts
• KT-54824 K2: missing smartcast after two levels of aliasing and a reassignment
• KT-53368 Out of bounds read in sse version of String::hashCode
• KT-54978 K2: Property accesses with explicit type arguments pass frontend checkers
• KT-51863 ClassCastException when using context receivers with named argument.
• KT-55123 JvmSerializableLambda is not applicable in common code in multiplatform projects
• KT-45970 Missing deprecation warnings for constant operators calls in property initializers
• KT-54851 K2: analysis of as/is contains multiple errors that result in missing diagnostics
• KT-54668 K2: Inference error in body of lazy property with elvis with Nothing in RHS
• KT-55269 FIR2IR: Static functions and nested classes are missing from Fir2IrLazyClass
• KT-55026 K2: Function hides internal constructor from another module
• KT-53070 Update intellij testdata fixes for FIR and merge it to master
• KT-53492 No parameter null check generated for constructor taking an inline class type
• KT-50489 Smart cast may lead to failing inference
• KT-55160 Kotlin's fragment element types must not extend IStubFileElementType
• KT-55143 K2: INAPPLICABLE_JVM_NAME in JVM does not work for inline classes
• KT-47933 Report warning if kotlin.annotation.Repeatable is used together with java.lang.annotation.Repeatable
• KT-55035 FIR: do not use FirValueParameter for FirFunctionalTypeRef
• KT-55095 Wrong containingDeclarationSymbol in type parameter from Enhancement
• KT-53946 K2: don't resolve Enum.declaringClass and Enum.getDeclaringClass
• KT-54673 K2. "Superclass is not accessible" from interface error for sealed interfaces
• KT-55074 OptIn false negative: constructor call with default argument value
• KT-54260 K2: "AssertionError: No modifier list, but modifier has been found by the analyzer" when annotated annotation and AllOpen plugin
• KT-55034 FIR: provide information about containing function/constructor to FirValueParameter
• KT-54744 K2: reassigning a var erases smartcast info of a variable derived from the old value
• KT-53988 K2: False negative "The expression cannot be a selector (occur after a dot)"
• KT-53983 K2 crashes with NPE when 'this' is used inside enum class constructor
• KT-54910 Can not declare typed equals operator in inline class with "Nothing" return type
• KT-54909 Usage of custom typed equals operator in generic inline class is type-unsafe
• KT-53371 Properly resolve FIR to get fully resolved annotations
• KT-53519 FIR: argument mapping for annotations on value parameter is not properly built
• KT-54827 MPP: "java.lang.IndexOutOfBoundsException: Index: 0" during compilation of androidMain target
• KT-54417 K2: move receiver-targeted annotations to KtReceiverParameterSymbol and remove it from FirProperty receiver type
• KT-54972 K2: Local functions with multiple type arguments are broken
• KT-54762 Private constructor is accessible from a public inline function via @PublishedAPI annotation
• KT-54832 Deprecate incorrect callable references resolution behavior for KT-54316
• KT-54732 DirectedGraphCondensationBuilder.paint fails with StackOverflowError during linkReleaseFrameworkIos64
• KT-54897 K2: value class with private constructor stripped by jvm-abi-gen cannot be used in another module
• KT-54784 NPE from IrSourceCompilerForInlineKt.nonLocalReturnLabel on non-local break and continue in anonymous initializers and in scripts
• KT-54840 Field for const property on interface companion object loses deprecated status when copied to interface
• KT-53825 class files are generated when compilation fails with platform declaration clash
• KT-54526 K2: Raw type scope is lost after exiting from elvis
• KT-54570 K2: False-positive OVERLOAD_RESOLUTION_AMBIGUITY in case of combination of raw types
• KT-52157 Annotation on type parameter isn't present in the symbol loaded from the library
• KT-54318 VerifyError on { null } in catch block
• KT-54654 K2: Implicit types leaks into delegated member
• KT-54645 K2: Clash of two inherited classes with the same name
• KT-53255 [FIR2IR] StackOverflowError with long when-expression conditions
• KT-48861 No warning on incorrect usage of array type annotated as Nullable in Java
• KT-54539 @Deprecated on members of private companion object is no longer needed
• KT-54403 Unexpected behaviour on overridden typed equals in inline class
• KT-54536 Unexpected result of comparison of inline class instances
• KT-54603 ClassCastException on comparison of inline classes with custom equals
• KT-54401 Unhandled exception on compilation inline class with 'equals' from 'Any' returning 'Nothing'
• KT-54378 K2: smart cast breaks subtyping in case with complex projections
• KT-53761 Reified type not propagated to supertype token through two inline functions
• KT-53876 Manually instantiated annotations with unsigned arrays are not equal
• KT-51740 NO_VALUE_FOR_PARAMETER: Consider increasing error highlighting range
• KT-54084 ClassCastException when trying to call a context receiver's method
• KT-51282 IllegalAccessError: Compiler for JVM 1.8+ makes lambdas access unaccessible classes when using @JvmMultifileClasses
• KT-53479 False positive "Cannot access 'runCatching' before superclass constructor has been called"
• KT-50950 JVM IR: "AssertionError: FUN SYNTHETIC_GENERATED_SAM_IMPLEMENTATION" when using bound reference to suspend SAM function
• KT-49364 "VerifyError: Bad type on operand stack" on cast which "can never succeed" from ULong to Int
• KT-51478 Inapplicable receiver diagnostic expected when there are two context receiver candidates

Docs & Examples

• KT-32469 @Synchronized on extension method doesn't generate instance lock

IDE

New Features

• KTIJ-24378 Update Kotlin plugin to 1.8.0 in IDEA 223.2

Performance Improvements

• KT-55445 KtUltraLightClassModifierList.hasModifierProperty requires resolve for PsiModifier.PRIVATE

Fixes

• KTIJ-24657 Disable pre-release and other metadata checks in IDE
• KT-55929 Unresolved dependencies for intermediate multiplatform SourceSets
• KTIJ-24179 Bundle Kotlin 1.8.0 with Intellij IDEA 2022.3.2
• KTIJ-23547 K2 IDE: Functional type: explicit parameter name VS ParameterName annotation
• KTIJ-23347 K2 IDE. False positive "Symbol fun intFun(): Unit is invisible" in tests
• KT-55862 Can't resolve kotlin-stdlib-js sources in IDE
• KTIJ-23587 K2: SOE in delegate field resolution
• KT-55782 [SLC] Typealiases are not exapnded in arguments of annotations
• KT-55778 [SLC] Incorrect determination of useSitePostion for types of local declarations
• KT-55780 [SLC] No approximation of anonymous and local types in members
• KT-55743 K2 SLC: SymbolLightClassForClassOrObject must have a name
• KT-55604 Descriptor leak
• KT-55502 SLC: drop redundant 'final' modifier from synthetic static enum members
• KT-55497 LC: drop @NotNull annotation from parameter from synthetic Enum.valueOf
• KT-55496 SLC: generated synthetic enum methods by symbols instead of manual creation
• KT-55481 SLC: implement correct java annotations for annotation classes (Retention, Target, etc.)
• KT-55470 SLC: implement light class for RepeatableContainer
• KT-55442 SLC: 'isInheritor' for 'DefaultImpls' should work correctly
• KTIJ-23449 K2: "parent must not be null" from SymbolLightClassBase.getContext()
• KT-40609 IDE: False positive "Exception is never thrown..." in Java when Kotlin getter is annotated with Throws
• KT-54051 Migrate symbol light classes from KtSymbol to KtElement

IDE. Completion

• KTIJ-22503 Support code completion for data objects
• KTIJ-22361 ISE “java.lang.IllegalStateException: Expected FirResolvedTypeRef with ConeKotlinType but was FirImplicitTypeRefImpl ” on K2

IDE. Debugger

• KTIJ-24259 Debugger is stuck in an infinite loop in an Android project
• KTIJ-24003 Smart step into doesn't work for Java synthetic properties references
• KTIJ-24039 Support smart step into for property setters

IDE. Decompiler, Indexing, Stubs

• KTIJ-24351 Kotlin Bytecode tool window: NullPointerException during inlining of inline function with object literal

IDE. Gradle Integration

• KTIJ-24616 Gradle Integration: "NoSuchMethodError: 'java.util.Collection org.jetbrains.kotlin.idea.projectModel.KotlinCompilation.getDeclaredSourceSets" during sync fail after updating Kotlin IJ Plugin to 1.8.20-Beta
• KT-55347 Broken IDE sync for js: java.lang.IllegalStateException: Accessing Compile Dependencies Transformations is not yet initialised
• KTIJ-23781 TCS: Gradle Sync: Support friend&dependsOn via IdeaKotlinSourceDependency

IDE. Gradle. Script

• KT-56941 Gradle KTS / Navigation: Go to declaration for Java types doesn't work

IDE. Inspections and Intentions

• KTIJ-23404 K2 IDE. Platform type is inserted as type parameter for "Change return type" intention
• KTIJ-24319 "Set module version to *" quickfix isn't working
• KTIJ-23225 "Change package" intention unintentionally and intractably replaces text inside of critical strings and comments
• KTIJ-23892 UsePropertyAccessSyntaxInspection should also suggest replacing getter method references with method synthetic properties referencies after Kotlin 1.9
• KTIJ-22087 Support IDE inspections for upcoming data objects
• KTIJ-24286 Constant conditions: false positive "Cast will always fail" with cast of java.lang.String to kotlin.String
• KTIJ-23859 ConvertObjectToDataObjectInspection support more hashCode and toString cases
• KTIJ-23760 Get rid of readResolve logic in ConvertObjectToDataObjectInspection

IDE. KDoc

• KTIJ-24342 KDoc: First line break character is swallowed when pasted

IDE. Misc

• KTIJ-24370 Remove link to k2.xml from plugin.xml in kt-223 branches
• KTIJ-24210 Compatibility issue with the CUBA plugin

IDE. Multiplatform

• KTIJ-21205 MPP: Kotlin not configured error is shown for K/N sources if Android target is presented
• KT-52172 Multiplatform: Support composite builds
• KT-56198 Multiplatform;Composite Builds: import fails if single jvm target multiplatform project consume included jvm build
• KTIJ-24147 MPP: NullPointerException: versionString must not be null

IDE. Refactorings. Move

• KTIJ-24243 Move declarations: "Search in comments and strings" and "Search for text occurrences" options are always enabled when files are moved

IDE. Script

• KT-56632 Script configuration cannot be loaded for embedded code snippets

IDE. Wizards

• KTIJ-24562 Android target created by wizard contains AGP higher than supported
• KTIJ-24402 Changes "Browser Application for Kotlin/Wasm" wizard template
• KTIJ-23525 Wizard: Compose multiplatform: project won't build and require higher compileSdkVersion

JavaScript

New Features

• KT-54118 Kotlin/JS IR: keep declarations with non-minified names
• KT-35655 Investigate could we use "names" field in SourceMaps to improve debug experience

Fixes

• KT-55971 KJS: Result of suspend function cannot be assigned to property of dynamic value
• KT-52374 KJS / IR: caling suspend function as dynamic ignores the rest of the expression
• KT-56884 KJS: "Top-level declarations in .d.ts files must start with either a 'declare' or 'export' modifier." caused by enum and array inside the companion object
• KT-51122 Provide fully-qualified method name in Kotlin/JS source maps
• KT-56602 KJS / Serialization: polymorphicDefaultDeserializer unbound on Kotlin 1.8.20-Beta
• KT-56580 KJS: languageVersionSettings string is unstable
• KT-56581 KJS: Lock file for incremental cache
• KT-56582 KJS: Function type interface reflection crashes the compiler in incremental build
• KT-55720 KJS: ReferenceError: SuspendFunction1 is not defined with 1.8 when importingkotlin.coroutines.SuspendFunction1
• KT-56469 KJS: BE Incremental rebuild spoils source map comment
• KT-55930 KJS: A recursive callable reference of the inline function leads broken cross module references
• KT-31888 Kotlin/JS: make possible to call main() in main run tasks, but not in test tasks
• KT-51581 FIR: support JS backend
• KT-55786 KJS: Rewriting of secondary constructors if they are protected
• KT-52563 KJS / IR: Invalid TypeScript generated for class extending base class with private constructor
• KT-55367 KJS / IR + IC: Moving an external declaration between different JsModules() doesn't rebuild the JS code
• KT-55240 KJS: "NoSuchElementException: No element of given type found" caused by @JsExport and Throwable's child class
• KT-54398 KJS / IR + IC: Support *.d.ts generation
• KT-55144 KJS / IR + IC: Modifying an inline function which is used as a default param in another inline function doesn't invalidate a caller
• KT-54134 KJS / IR: "TypeError: Cannot read properties of undefined" in js block wrapped with suspend functions around
• KT-54911 KJS / IR + IC: invalidate all klib dependencies after removing it
• KT-54912 KJS / IR + IC: Commit cache header only in the end (after lowering)
• KT-52677 Native: StackOverFlow during "kotlin.ir.util.RenderIrElementVisitor$renderTypeAnnotations$1.invoke"
• KT-54480 KJS: "Exported declaration contains non-consumable identifier" warning when exporting modules as default
• KT-41294 KJS: Weird behaviour of j2v8 in test infra
• KT-54173 Kotlin/JS + IR: failed to provide keep setting to avoid DCE remove of default interface function from implementing object

Language Design

• KT-55451 Preview of lifting restriction on secondary constructor bodies for value classes
• KT-54621 Preview of Enum.entries: modern and performant replacement for Enum.values()
• KT-54525 Preview of Java synthetic property references
• KT-55337 Preview of data objects
• KT-55344 Deprecate @Synchronized in platforms except JVM

Libraries

• KT-35508 EXC_BAD_ACCESS(code=2, address=0x16d8dbff0) crashes on iOS when using a sequence (from map() etc.)
• KT-56794 Libraries: "Recursively copying a directory into its subdirectory is prohibited" Path.copyToRecursively fails on copying from one ZipFileSystem to another ZipFileSystem
• KT-55935 [Kotlin/JVM] Path.copyToRecursively does not work across file systems
• KT-55978 Provide Common Base64 encoding in stdlib
• KT-46211 [Kotlin/Native] Stack overflow crash in Regex classes with simple pattern and very large input
• KT-31066 Add Closeable & use to common stdlib
• KT-55609 Introduce experimental kotlin.concurrent.Volatile annotation
• KT-39789 Segfault in Kotlin/Native regex interpreter
• KT-53310 Native: HashMap/HashSet doesn't reclaim storage after removing elements

Native

• KT-56443 Native link task reports w: Cached libraries will not be used for optimized compilation
• KT-55938 [Kotlin/Native] Inline functions accessing ObjC class companion cause compiler to crash when building static caches in 1.8.20 dev build

Native. C and ObjC Import

• KT-55303 Objective-C import: improve -fmodules flag discoverability.
• KT-39120 Cinterop tool doesn't support the -fmodules compiler argument
• KT-40426 Incorrect Objective-C extensions importing that prevents UIKit usage
• KT-55653 Since Kotlin 1.8.0 NSView.resetCursorRects doesn't exist anymore and cannot override it
• KT-54284 Kotlin/Native: cinterop produces non-deterministic metadata

Native. ObjC Export

• KT-56350 Kotlin/Native: restore "use Foundation" in generated Objective-C frameworks
• KT-55736 Native: exporting suspend function from a cached dependency to Objective-C crashes with "Suspend functions should be lowered out at this point"
• KT-53638 Native: support disabling mangling globally for Swift names in generated Objective-C header
• KT-53069 SOE on K/N framework build for Arm64
• KT-53317 ObjCName annotation is not applied to an extension receiver in Objective-C export

Native. Stdlib

• KT-53064 Native: provide stdlib API to obtain memory management statistics

Reflection

• KT-27585 Flaky IllegalPropertyDelegateAccessException: Cannot obtain the delegate of a non-accessible property. Use "isAccessible = true" to make the property accessible
• KT-55178 Improve performance of KCallable.callBy
• KT-53279 Reflection: "KotlinReflectionInternalError: Method is not supported" caused by @Repeatable annotation deserialization at runtime if it's repeated and contains arrays
• KT-44977 Reflection: ClassCastException caused by annotations with "AnnotationTarget.TYPE" usage on array attributes access

Tools. CLI

• KT-57077 1.8.20-RC-243 shows Java 19 warnings even if configured with Java 17 toolchain
• KT-56992 Performance test regression in Gradle when switching to Kotlin 1.8.20
• KT-56789 Metaspace memory leak in CoreJrtFileSystem
• KT-56925 Remove warning about assignment plugin
• KT-54652 Enable -Xuse-fir-lt by default when -Xuse-k2 is turned on, provide way to disable
• KT-55784 Unable to format compilation errors with ansi colors in compilation server
• KT-54718 K2: Compiler crashes with "IllegalArgumentException: newPosition > limit"
• KT-54337 CLI: compiling module-info.java without explicitly specified JDK home leads to a weird error

Tools. Commonizer

• KT-47429 [Commonizer] OKIO support
• KT-51517 C Interop Commonizer Fails On Classifier That Doesn't Exist

Tools. Compiler Plugins

Fixes

• KT-53590 K2 Allopen does not look for transitive meta-annotations
• KT-56487 Add more methods to DescriptorSerializerPlugin
• KT-54020 [K2] [NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER] error in case 'static Name' param was added to @AllArgsConstructor annotation and an empty list is set as a constructor param value
• KT-53096 Create a pack of compiler utilities for generating declarations from plugins
• KT-55248 K2/PluginAPI: getCallableNamesForClass/generateClassLikeDeclaration are not called for synthetic companions of local classes
• KT-54756 Deprecate "legacy" mode of jvm-abi-gen plugin
• KT-55233 jvm-abi-gen strips out InnerClass attributes
• KT-54994 K2 plugin API: Compile-time constants are not evaluated before IR
• KT-55023 K2 plugin API: Compilation with Kotlin daemon fails after certain number of tries
• KT-55286 K2: Parcelize plugin sometimes can't find nested objects in current class
• KT-54500 Private type aliases can be referenced from public declarations, but are stripped by jvm-abi-gen

Tools. Compiler plugins. Serialization

• KT-56738 Unexpected SERIALIZER_NOT_FOUND when compiling against binary with enum
• KT-56990 "AssertionError: SyntheticAccessorLowering should not attempt to modify other files" in kotlinx-serialization using @Serializer and List argument
• KT-54441 Prohibit implicit serializer customization via companion object
• KT-49983 Implement prototype of kotlinx.serialization for K2 compiler
• KT-48733 "AssertionError: Unexpected IR element found during code generation" caused by Serialization and annotation with default parameter
• KT-54297 Regression in serializable classes with star projections

Tools. Gradle

New Features

• KT-54691 Kotlin Gradle Plugin libraries alignment platform
• KT-54492 Send gradle build errors from idea
• KT-55540 Add compilation speed metric in build reports
• KT-55541 Validate FUS metrics values on Gradle side

Performance Improvements

• KT-54836 Kotlin/JVM Gradle plugin creates task eagerly on Gradle 7.3+
• KT-55995 Add ability to perform precise compilation task outputs backup
• KT-54579 Kapt tasks slow down significantly on Windows when running with JDK 17 compared to JDK 11
• KT-54588 KotlinCompile: Avoid calling FileCollection.getFiles() multiple times

Fixes

• KT-57296 Build statistics sending errors in case of buildSrc directory usage with kotlin-dsl plugin applied
• KT-56645 Gradle: KGP reports an incorrect resources processing task name for JVM projects
• KT-55824 Deprecate commonMain.dependsOn(anything) in user scripts
• KT-56221 Gradle KTS: False positive Val cannot be reassigned when using an extension and its property with an implicit set operator
• KT-55452 Values of the compiler arguments set via KotlinCompile task configuration are duplicated by the KaptGenerateStubs task
• KT-55565 Consider de-duping or blocking standard addition of freeCompilerArgs to KaptGenerateStubsTask
• KT-55632 'The configuration :kotlinCompilerClasspath is both consumable and declarable' messages are displayed in logs for different types of projects for KotlinCompile task with gradle 8
• KT-56414 Dependency locking and failed builds with Kotlin 1.8.10
• KT-52625 Compatibility with Gradle 7.4 release
• KT-55544 Gradle: add more debugging information for finding usages of kotlinOptions.freeCompilerArgs
• KT-52149 Gradle: declare shared build services usages with Task#usesService
• KT-55323 Gradle: allow to opt-out of reporting compiler arguments to a http statistics service
• KT-53811 Compatibility with Gradle 7.6 release
• KT-52998 Compatibility with Gradle 7.5 release
• KT-55741 Gradle 8: Build service '' is being used by task '' without the corresponding declaration via 'Task#usesService'.
• KT-55174 KotlinCompile task produces deprecation "Build service 'variant_impl_factories_...' is being used by task"
• KT-54425 Kotlin Gradle Plugin should not use deprecated UsageContext#getUsage()
• KT-54998 "kotlin.gradle.performance" FUS collector reports data twice
• KT-55520 Add required configuration for Kotlin Gradle Plugin API reference publication
• KT-52963 Build report code breaks Gradle project isolation.
• KT-55164 KGP: "Cannot access project ':' from project ':list'" JVM - Project Isolation with Multi Modules and Configuration Cache fails
• KT-52490 Gradle: [org.jetbrains.kotlin.gradle.testing.internal] TestReport.destinationDir and TestReport.reportOn deprecation warnings
• KT-55000 Include information about the new IC into "kotlin.gradle.performance" FUS collector
• KT-54941 Gradle, Daemon, MacOS M1: "Native integration is not available for Mac OS X aarch64" on first build
• KT-45748 Migrate all Kotlin Gradle plugin Android tests to new test setup
• KT-54029 Validate Binary Compatibility for kotlin-gradle-plugin-api

Tools. Gradle. Cocoapods

• KT-41830 CocoaPods integration: Support link-only mode for pods
• KT-55117 PodGenTask doesn't declare ouputs properly
• KT-55243 Gradle 7.6: Cocoapods plugin generates invalid podspec when applied in root project
• KT-56304 Podspec generated with new K/N artifact DSL contains wrong artifact names for static and dynamic libraries
• KT-56298 Assemble tasks for native binaries fail if more than one kotlin artifact is declared in one gradle project
• KT-55801 Deprecate useLibraries
• KT-55790 Improper sdk selected for watchosDeviceArm64 target

Tools. Gradle. JS

New Features

• KT-25878 Provide Option to Define Scoped NPM Package
• KT-37759 [Gradle, JS] Support arguments of command line for webpack and nodejs task
• KT-33518 Allow specifying command line args for node in nodejs or mocha tests
• KT-46163 KJS / Ktor: Support run on the next free port if default one is occupied

Performance Improvements

• KT-55476 KotlinWebpack should be cacheable
• KT-39108 Kotlin multiplatform plugin targeting js takes too long compared to the old kotlin-frontend plugin
• KT-45411 Investigate memory consumption in npm package
• KT-51376 KJS / Gradle: Dukat tasks make impact on build time even if there's no npm dependencies

Fixes

• KT-57285 KJS / Gradle / MPP: FileNotFoundException on publishing empty KJS sourceset
• KT-57068 KJS / Gradle: "Unable to find method 'kotlin.gradle.targets.js.dsl.KotlinJsBrowserDsl.testTask'" after updating to 1.8.20-Beta
• KT-54445 KJS Remove dukat integration
• KT-56999 K/JS: KotlinJsIrLink::rootCacheDirectory property must be public
• KT-56765 K/JS: Several binaries use same cache directory
• KT-54529 KJS / IR: generate typescript definitions only on explicit Gradle action
• KT-56488 Debugger won't stop on breakpoints of JS browser test
• KT-56719 KJS / Gradle: Compile sync task has to sync only changed files
• KT-56131 KJS / Gradle: Could not create an instance of type org.jetbrains.kotlin.gradle.targets.js.subtargets.KotlinNodeJs when task configuration avoidance is broken
• KT-37668 Kotlin/JS: nodeTest failure due to main() function fail is reported as "BUILD SUCCESSFUL"
• KT-35285 Kotlin/JS + Gradle: browserDevelopementWebpack and browserProductionWebpack could write to different locations
• KT-55593 KotlinJsCompilerType and KotlinJsCompilerTypeHolder LEGACY and BOTH constants should be marked as @Deprecated in 1.8
• KT-33291 JS: No build result with gradle parallel build in multiproject build
• KT-40925 KJS: need a way to configure extra environment variables for the test task
• KT-47236 KJS: kotlinNpmInstall fails if no yarn is downloaded
• KT-53288 KJS / Gradle: FileNotFoundException when customising moduleName
• KT-54511 Kotlin/JS generated package.json main field is not correctly set if module name contains a / (slash)
• KT-54421 KJS / Legacy: Kotlin 1.7.20 fails when running tests on Node 14
• KT-54503 Make the target observer API public in kotlin JS Extension
• KT-54418 KJS: Change test running with kotlin-test adapter
• KT-54132 KJS IR: Sometimes karma failed on teamcity because of uninitialized browser

Tools. Gradle. Multiplatform

New Features

• KT-54766 TCS: external Android Target APIs: Milestone: Compile
• KT-50967 Make c-interop libs resolve robust to build clean
• KT-53570 multiplatform 'natural hierarchy' prototype

Fixes

• KT-36943 Gradle Plugin (multiplatform) - Consider publishing a 'sourcesElements' variant for the sources.jar
• KT-57460 Kotlin Gradle Plugin: Null this pointer in transformCommonMainDependenciesMetadata
• KT-57306 [Kotlin 1.8.20-RC] GradleException: Could not load the value of field apiConfiguration of org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.DefaultKotlinCompilationConfigurationsContainer
• KTIJ-23750 KotlinMppModelSerializationService is not invoked in production environment
• KTIJ-24223 Update latest tested KGP version to 1.9.0-dev-764
• KT-56536 Multiplatform: Composite build fails on included build with rootProject.name != buildIdentifier.name
• KTIJ-23889 TCS: Gradle Sync: Match sources.jar dependencies to sourceSetName scoped dependencies
• KT-56729 commonizeCInterop: Duplicated libraries: co.touchlab:sqliter-driver-cinterop-sqlite3
• KT-56510 Import with included plugin build may fail with OverlappingFileLockException during commonizeNativeDistribution
• KT-54180 TCS: Initial external Android Target APIs
• KT-55010 TCS: External Android Target Prototype: Setup Android dependencies
• KT-54783 KotlinJvmWithJavaCompilation mututal .all listener loop creates two compilations
• KT-54867 KotlinWithJavaCompilation does not respect javaSourceSet classpaths
• KT-52413 MPP: Gradle dependency substitution breaks KMP import for native targets
• KT-56115 Multiplatform;Composite Builds: Support import with cinterop commonization enabled
• KT-54312 TCS: Replace CompilationDetails abstract class hierarchy by composable implementation
• KT-47441 MPP: Unresolved reference for dependent on the other module with dependencySubstitution
• KT-56429 Fix flaky: MppIdeDependencyResolutionIT.test cinterops - are stored in root gradle folder
• KT-56337 Unable to import a project with cinterop with enableKgpDependencyResolution
• KT-55873 Unrequested dependencies leaking into common source sets: Regression after 703fd0f
• KT-55891 Deprecate pre-HMPP flags
• KT-56278 TCS: Gradle Sync: [MISSING_DEPENDENCY_CLASS] on libraries used in shared native source sets
• KT-56143 CInteropDependencyConfiguration and CInteropApiElementsConfiguration are missing attributes defined on target
• KT-56285 TCS: Gradle Sync: IdeProjectToProjectCInteropDependencyResolver: Ensure lenient resolution
• KT-56204 KotlinTargetHierarchy: Changing naming from 'any' to 'with' prefix
• KT-56111 Multiplatform;Composite Builds: Clean builds fail on when 'hostSpecificMetadata' is required
• KT-54974 TCS: Gradle Sync: Implement IdeKotlinDependencyResolvers
• KT-38712 Gradle configuration's name with word "implementation" is camelcased to "İmplementation" if default locale is Turkish
• KT-54975 TCS: Gradle Sync: Implement stdlib-common filter for platform source sets
• KT-48839 Sources.jar of the root artifact of MPP library includes source files from test sourcesets
• KT-55492 TCS: Gradle Sync: Sources and Documentation as extra 'classpath'
• KT-55237 TCS: Gradle Sync: Support stdlib-native sources
• KT-55475 TCS: Gradle Sync: Fine tune jvmAndAndroid source sets
• KT-55189 TCS: Gradle Sync: Support icons (native, js) and global libraries
• KT-55218 KotlinTargetHierarchy: Disambiguate declaring targets vs including targets
• KT-55112 TCS: Gradle Sync: Resolve Source Dependencies
• KT-54977 TCS: Gradle Sync: Implement debugging tools
• KT-54948 TCS: Gradle Sync: Port IdeaKpmPlatformDependencyResolver to TCS
• KT-55289 TCS: Gradle Sync: Prototypical sources jar resolution
• KT-55238 TCS: Gradle Sync: Support commonized native distribution
• KT-55230 Remove metadata dependencies transformation for runtimeOnly scope
• KT-53338 Prettify the message about incompatible AGP and KGP versions
• KT-55134 MPP / Gradle: Cannot read test tasks state
• KT-54506 Test tasks are considered up-to-date after a failure when triggered by allTests
• KTIJ-23509 Update latest tested KGP version to 1.8.20-dev-1815
• KT-54787 Test tasks are not up-to-date when an individual test task called after aggregating test task
• KT-54033 Multiplatform/Android Source Set Layout 1: Also support setting source dirs using AGP Apis
• KT-54202 CInterop Commonization fails on first run when native distribution is not yet commonizied
• KT-54135 Add documentation with examples to CompositeMetadataArtifact

Tools. Gradle. Native

• KT-37051 MPP Gradle plugin: duplicated cinterop libraries in composite build
• KT-55650 Pass through errors from Gradle to Xcode
• KT-56205 Shared Native Compilation: False positive 'w: Could not find' warnings on metadata klibs
• KT-54969 Support podspec generation for the new K/N artifact DSL

Tools. Incremental Compile

• KT-55021 New IC: "The following LookupSymbols are not yet converted to programSymbols" when removing/renaming file facades
• KTIJ-21161 Incremental build is taking too long when no files have changed in the project
• KT-53832 Enable new incremental compilation by default in Gradle
• KT-55622 MPP: Incremental compilation ignores changes in source set structure
• KT-55309 IC: Get rid of NonCachingLazyStorage
• KT-53402 Incremental compilation tries to compile resources
• KT-54791 Incremental compilation in JPS broken in 1.8.20-dev-1815

Tools. JPS

• KT-56165 Language version 1.9 and 2.0 is absent in Kotlin Compiler settings
• KT-51536 [JPS] Recompile module on facet settings change
• KT-53735 JPS / IC: "IOException: The system cannot find the file specified" on Windows
• KT-47983 [JPS] Adding compilerSettings to Facet should initiate rebuild of module
• KT-54449 Cyrillic characters in a filename break builds on linux

Tools. Kapt

New Features

• KT-53135 Enable JVM IR for KAPT stub generation by default
• KT-41129 kotlin-maven-plugin + kapt - allow aptMode to be set according to docs

Fixes

• KT-56635 KAPT / IR: "Unresolved reference: DaggerGeneratedCodeTest_AppComponent " caused by stub generation with Kotlin 1.8.20-Beta
• KT-56360 Kapt with JVM IR changes fields order
• KT-54380 Kapt / IR: Build failed when inheritance by functional interface with suspend modifier
• KT-54245 JVM IR / Kapt / Serialization: NullPointerException in SerializableIrGenerator.kt
• KT-33847 Kapt does not included Filer-generated class files on compilation classpath
• KT-55490 Kapt + JVM IR: "annotation @Foo is missing default values"
• KT-43786 KAPT: IllegalStateException: SimpleTypeImpl should not be created for error type: ErrorScope
• KT-43117 Kapt: "System is already defined in this compilation unit"
• KT-46966 Kapt: correctErrorTypes: receiver type is NonExistentClass
• KT-46965 Kapt: correctErrorTypes: custom setter gets Object parameter type
• KT-51087 KAPT: @JvmRepeatable annotations are present in inverse order in KAPT stubs
• KT-54870 KAPT stub generation with JVM_IR backend throws exception for delegated properties
• KT-44350 Kapt Gradle integration tests failing with Android Gradle plugin 7.0
• KT-54030 Kapt: annotation processor warnings are displayed as errors on JDK 17+
• KT-32596 kapt replaces class generated by annotation processor with error.NonExistentClass when the class is used as an annotation
• KT-37586 KAPT: When delegated property use an unknown type (to-be-generated class), correctTypeError will mess up the $delegate field type

Tools. Maven

• KT-56697 IC: "Incremental compilation was attempted but failed" Failed to get changed files: java.io.IOException: readPrevChunkAddress
• KT-55709 Maven: "java.lang.reflect.InaccessibleObjectException: Unable to make field protected java.io.OutputStream java.io.FilterOutputStream.out accessible"
• KT-29346 Add components.xml to automatically compile kotlin maven projects
• KT-13995 Maven: Kotlin compiler plugin should respect model's compile source roots
• KT-54822 Maven: Too low-level error message "Parameter specified as non-null is null: method kotlin.text.StringsKt__StringsJVMKt.startsWith, parameter " from Kotlin Maven plugin invoking compiler when tags are empty
• KT-47110 Disable jdk8-specific warnings in kotlin-maven-plugin

Tools. Scripts

• KT-54095 It is difficult (if not impossible) to use kotlin compiler plugins with scripting
• KT-54461 Warnings and stack traces when executing scripts via kotlin-maven-plugin
• KT-54733 Scripts: ConcurrentModificationException in *.main.kts scripts
• KT-53283 Scripts: main-kts JAR does not relocate embedded SLF4J and jsoup libraries

Checksums

File	Sha256
kotlin-compiler-1.8.20.zip	10df74c3c6e2eafd4c7a5572352d37cbe41774996e42de627023cb4c82b50ae4
kotlin-native-linux-x86_64-1.8.20.tar.gz	43d3f2149c4862b9b3ebf84a0f26912f2a587082d2858747564ffeafd2534438
kotlin-native-macos-x86_64-1.8.20.tar.gz	e39e801eb8ae2e86a8fe0b5ee32535bf176fd284b6f6883a431cafbb27684055
kotlin-native-macos-aarch64-1.8.20.tar.gz	becc0f4367ae8854f33546efff40767cc2cb227da0cd7935a9a6784e9a2736d2
kotlin-native-windows-x86_64-1.8.20.zip	5e25ef348e9eab9895f63047a3857b428dc977e81d22771a69d712500d7cf60a