Kotlin 2.1.21-RC

Changelog

Backend. Native. Debug

• KT-75991 Xcode 16.3: Fix lldb stepping test over an inline function

Compiler

• KT-75992 Xcode 16.3: stacktraces on simulators are not symbolicated
• KT-76663 KJS: KotlinNothingValueException caused by expression return since 2.1.20
• KT-75756 Backend Internal error: Exception during IR lowering when trying to access variable from providedProperties in class within kotlin custom script
• KT-76209 CONFLICTING_UPPER_BOUNDS on Nothing bound
• KT-70352 K2: False-negative CONFLICTING_UPPER_BOUNDS on Nothing bound
• KT-74739 Native: "IllegalArgumentException: All constructors should've been lowered: FUNCTION_REFERENCE"
• KT-75483 Native: redundant unboxing generated with smart cast
• KT-71425 IR Inliner: investigate return type of an inlined block

Compose compiler

• b/408013789 Add missing return for the default function wrappers
• b/405541364 Realize coalescable children in the body of key call
• b/401484249 Generate a group around Array constructor call
• b/400380396 Fix missing endMovableGroup call with early return in key function

Native

• KT-76252 Native: executable crash with generic value classes with 2.1.20

Native. C and ObjC Import

• KT-75781 Xcode 16.3: Fix cinterop tests failing with fatal error: could not build module '_stdint'

Native. Runtime. Memory

• KT-74280 Native: GC.collect crashes with -Xallocator=std

Tools. CLI

• KT-74663 kotlinc-js CLI: not providing -ir-output-dir results in NullPointerException

Tools. Compiler Plugins

• KT-76162 "IllegalStateException: No mapping for symbol: VALUE_PARAMETER INSTANCE_RECEIVER" after updating to 2.1.20

Tools. Gradle

• KT-73142 Kotlin Gradle plugin: Remove usage of Gradle's internal ExecHandleBuilder
• KT-73684 Run integration tests against Gradle 8.12
• KT-74889 Compile against Gradle 8.13 API
• KT-74887 Compatibility with Gradle 8.13 release
• KT-36004 Update 'org.gradle.usage' attribute rules to support the 'JAVA_API' and 'JAVA_RUNTIME' value
• KT-72694 Accessing Task.project during execution is being deprecated in Gradle 8.12
• KT-74890 Run Gradle integrations test against Gradle 8.13 release
• KT-73682 Compatibility with Gradle 8.12 release
• KT-73968 KotlinDependencyManagement tries to mutate configuration after it was resolved
• KT-73683 Compile against Gradle API 8.12

Tools. Gradle. JS

• KT-74735 KGP uses Gradle internal CompositeProjectComponentArtifactMetadata
• KT-71879 Notice of upcoming deprecation for Boolean 'is-' properties in Gradle Groovy scripts

Tools. Gradle. Multiplatform

• KT-75808 KGP: MPP with jvm target and Gradle java-test-fixtures is broken
• KT-75605 Dependency resolution fails in commonTest/nativeTest source sets for KMP module when depending on another project due to missing PSM
• KT-75512 Maven-publish: ArtifactId is not correct inpom file with customized withXml

Tools. Incremental Compile

• KT-62555 Wrong ABI fingerprint for inline function containing a lambda

Tools. Kapt

• KT-75936 K2 KAPT: unsupported FIR element kinds in constant evaluation
• KT-75942 K2 KAPT: underscore not allowed here

Tools. Scripts

• KT-76424 Dependencies in main.kts not working with 2.1.20
• KT-76296 Kotlin script compiler crashes when secondary constructor calls a function
• KT-75589 Scripts: "IndexOutOfBoundsException in jdk.internal.util.Preconditions.outOfBounds" when trying to extend a class which uses global variable

Tools. Wasm

• KT-76161 Wasm: "export startUnitTests was not found" after updating to Kotlin 2.1.20

Kotlin 2.2.0-Beta1

Changelog

Analysis API

• KT-75880 K2 Mode: Typealias reference resolves to the underlying class in KMP project
• KT-74246 KaVisibilityChecker.isVisible is inefficient with multiple calls on the same use-site
• KT-57733 Analysis API: Use optimized ModuleWithDependenciesScopes in combined symbol providers

Analysis API. Code Compilation

• KT-75502 K2: IDEA hangs when evaluating inside kotlin-stdlib modules in the Kotlin project
• KT-73077 Evaluation of inline functions is broken inside Kotlin project and Amper module in Idea sources
• KT-73936 K2: CyclicInlineDependencyException: Inline functions have a cyclic dependency in evaluator
• KT-74582 InterpreterMethodNotFoundError when trying to evaluate simple expressions after recent fixes
• KT-74524 Compilation exception with incorrect JvmName annotation arguments
• KT-74443 Compilation peer collector ignores inline property accessors

Analysis API. FIR

Performance Improvements

• KT-75790 Experiment with increasing DEFAULT_LOCKING_INTERVAL time
• KT-72159 LLFirCompilerRequiredAnnotationsTargetResolver: consider rewriting it to use honest jumping locks

Fixes

• KT-72908 K2 Analysis API: "FirDeclaration was not found for class org.jetbrains.kotlin.psi.KtFunctionLiteral" with non-local destructuring declaration without initializer before init block
• KT-75532 ContextCollector: scope for an anonymous function type parameter contains regular parameters
• KT-74508 FirElementBuilder#findElementInside should reuse logic from KtToFirMapping#getFir
• KT-73066 [LL] Enable low-level-api-fir-native even with the disabled native part
• KT-75132 Investigate failures of sandbox diagnostic test
• KT-75130 Set up LL FIR tests for sandbox test data
• KT-73386 Standardize LL FIR test for compiler test data
• KT-75125 ISE “Value classes cannot have 0 fields” on instantiating inline class without fields
• KT-75179 ContextCollector: support error properties
• KT-74632 K2: ISE FirLazyDelegatedConstructorCall should be calculated before accessing
• KT-73493 Support context parameters
• KT-73183 Support context parameters in ContextCollectorVisitor
• KT-60350 K2 IDE: top level destructuring RHS should be resolvable
• KT-74794 K2: FirLazyExpression should be calculated before accessing with context parameter and implicit return type
• KT-72938 Get rid of KaFirAnnotationListForReceiverParameter
• KT-73727 Exception in implicit type resolution

Analysis API. Infrastructure

• KT-74917 [Analysis API, Test Framework] Introduce a way to acquire PsiFile for a given TestFile in KtTestModule

Analysis API. Light Classes

• KT-75391 Reduce the amount of psi-based logic in light classes
• KT-70001 SLC adds @Override with zero text offset on override member
• KT-75755 K2. False positive red code on vararg parameters in Kotlin class with @JvmOverloads when called from Java
• KT-75397 Constructors and functions with non-last vararg parameters are treated as varargs
• KT-73405 Get rid of KtElement#{symbolPointer, symbolPointerOfType} API usages
• KT-74868 Support context parameters
• KT-74733 SymbolPsiLiteral.text == value for Java constant
• KT-74620 Delegated functions with value classes are present in light classes
• KT-74595 Static functions with value classes are present in light classes
• KT-74284 Synthetic data class methods using value class types present in LC

Analysis API. Providers and Caches

• KT-74090 Analysis API: Support dumb mode (restricted analysis)
• KT-74943 Analysis API: Replace KotlinGlobalModificationService with simpler global modification event publishing and listener-based modification trackers
• KT-70518 K2: Analysis API: Access indices outside of ConcurrentMap computation in symbol providers
• KT-62115 Analysis API: Package providers are not cached per search scope
• KT-74302 Analysis API: LLFirProvider should disregard self-declarations in getFirClassifierBy*
• KT-74463 Analysis API: LLNativeForwardDeclarationsSymbolProvider queries its cache even when the ClassId cannot represent a native forward declaration
• KT-67868 Analysis API: Improve the architecture of LLFirKotlinSymbolProviders

Analysis API. Standalone

• KT-72810 withMultiplatformLightClassSupport is inconvenient in Standalone

Analysis API. Stubs and Decompilation

• KT-68484 K2 IDE, Analysis API: "We should be able to find a symbol for function" for getting KaType of Iterable<T>.map(transform: (T) -> R) parameter in J2K

Analysis API. Surface

New Features

• KT-74475 Add isInline for KaPropertySymbol
• KT-75063 KaScopeContext: support context parameters

Performance Improvements

• KT-70165 Introduce PSI-based KaSymbols for K2

Fixes

• KT-72482 "KotlinIllegalArgumentExceptionWithAttachments: Expected all candidates to have same callableId but some of them but was different" on trying to add the import
• KT-75894 Cannot build KaFirJavaFieldSymbol for FirFieldImpl
• KT-75586 KaFirPropertyGetterSymbol#isInline and KaFirPropertySetterSymbol#isInline is incorrect for accessors with explicit modifier
• KT-58572 Analysis API: Enforcing STATUS resolve in 'KtFirNamedClassOrObjectSymbol.visibility' may cause lazy resolve contract violation
• KT-72730 K2: "Unexpected owner function: KtNamedFunction" on vararg val parameter in function
• KT-75574 Recognize injected code fragment copies
• KT-75573 Recognize physical file copies as dangling files
• KT-74801 Analysis API: Publish/subscribe to modification events with a single message bus topic
• KT-73290 Analysis API: Improve the architecture of content scopes and resolution scopes
• KT-68901 Constructor delegation call receiver missing in fir implementation
• KT-75115 Analysis API: The JavaModuleResolver compiler class is leaked to Analysis API platform implementations
• KT-75123 K2. KaFirNamedFunctionSymbol should contain a receiver
• KT-72639 Support context parameter API
• KT-73112 AA: FirExpression.toKtReceiverValue should handle context receivers properly
• KT-74905 Cannot find context receiver in FIR declaration
• KT-74563 createPointer is overloaded not for all implementations
• KT-73722 Analysis API: Automatically check that the API surface is fully documented
• KT-65065 Provide KtTypeReference#getShortTypeText()

Backend. Wasm

• KT-59032 Support instantiation of annotation cl...

Kotlin 2.1.20

Changelog

Analysis API

Fixes

• KT-68198 Analysis API: Support application service registration in plugin XMLs
• KT-57733 Analysis API: Use optimized ModuleWithDependenciesScopes in combined symbol providers
• KT-73156 AA: type retrieval for erroneous typealias crashes
• KT-71907 K2 debugger evaluator failed when cannot resolve unrelated annotation
• KT-69128 K2 IDE: "Unresolved reference in KDoc" reports existing Java class in reference to its own nested class
• KT-71613 KaFirPsiJavaTypeParameterSymbol cannot be cast to KaFirTypeParameterSymbol
• KT-71741 K2 IDE. Classifier was found in KtFile but was not found in FirFile in libraries/tools/kotlin-gradle-plugin-integration-tests/build.gradle.kts in kotlin.git and broken analysis
• KT-71942 Need to rethrow Intellij Platform exceptions, like ProcessCanceledException
• KT-70949 Analysis API: "containingDeclaration" does not work on nested Java classes in K2 implementation
• KT-69736 K2 IDE: False positive resolution from KDoc for value
• KT-69047 Analysis API: Unresolved KDoc reference to extensions with the same name
• KT-70815 Analysis API: Implement stop-the-world session invalidation
• KT-69630 KAPT User project builds with KAPT4 enabled fail with Metaspace overflow

Analysis API. Code Compilation

• KT-71263 K2 evaluator: Error in evaluating self property with extension receiver

Analysis API. FIR

Performance Improvements

• KT-72025 FileStructureElement: reduce redundant resolve
• KT-74012 Redundant FirAbstractBodyResolveTransformerDispatcher.<init> CPU consumption
• KT-73900 ContextCollectorVisitor#computeContext may spend significant time on createSnapshot
• KT-73665 FirElementFinder is inefficient in large files
• KT-73330 Remove bodies from functions without contracts after the CONTRACTS phase
• KT-73017 Analysis API: FirReferenceResolveHelper.getSymbolsByResolvedImport searches for classes even when the selected FqName is a known package

Fixes

• KT-72308 getOrBuildFir returns null for this expression for plusAssign operator
• KT-72660 ISE: Recursive update at org.jetbrains.kotlin.analysis.low.level.api.fir.caches.FirCaffeineCache.getValue
• KT-74097 ISE: Recursive update at org.jetbrains.kotlin.analysis.low.level.api.fir.caches.FirCaffeineCache.getValue
• KT-74098 ISE: Recursive update at org.jetbrains.kotlin.analysis.low.level.api.fir.caches.FirCaffeineCache.getValue
• KT-72148 K2: KISEWA: Expected FirResolvedArgumentList for FirAnnotationCallImpl of FirValueParameterImpl(DataClassMember) but FirArgumentListImpl found
• KT-73079 K2: Internal compiler error when conflicting type aliases are present
• KT-73456 Expected FirResolvedContractDescription but FirRawContractDescriptionImpl found for FirSimpleFunctionImpl
• KT-73259 Expected FirResolvedContractDescription but FirLegacyRawContractDescriptionImpl found for FirSimpleFunctionImpl
• KT-72740 FirDanglingModifierList: lazyResolveToPhase(STATUS) cannot be called from a transformer with a phase STATUS
• KT-66132 K2: FirRegularClass expected, but FirFileImpl found | Containing declaration is not found
• KT-72196 K2. KMP. IllegalStateException: expect-actual matching is only possible for code with sources
• KT-72652 FirProvider#getContainingClass should support FirDanglingModifierSymbol
• KT-73105 Lazy resolve contract violation (BODY_RESOLVE from BODY_RESOLVE)
• KT-66261 K2: Analysis API: "FirDeclaration was not found for class org.jetbrains.kotlin.psi.KtProperty, fir is null" with MULTIPLE_LABELS_ARE_FORBIDDEN K2 error
• KT-72315 K2. KIWA on usage of always-true OR in guard condition
• KT-65707 K2 IDE: unresolved calls of callables imported with typealias as qualifier
• KT-61516 K2: Provide an LL FIR implementation for getContainingClassSymbol (in FirHelpers)
• KT-72853 Expected FirResolvedArgumentList for FirAnnotationCallImpl of FirContextReceiverImpl(Source) but FirArgumentListImpl found
• KT-64215 K2: do not resolve type annotations of receiver if it is used as an implicit return type
• KT-64248 K2: do not resolve type annotations of context receiver if it is used as an implicit return type
• KT-72821 Add assertion to diagnostic tests to check that all declarations have BODY_RESOLVE phase at the end
• KT-64056 K2: K2: FirLazyBodiesCalculator shouldn't calculate annotation arguments on type phase
• KT-71651 K2 IDE: False positive NON_LOCAL_SUSPENSION_POINT in suspend function call
• KT-72164 K2. IllegalArgumentException when pre and post increment are used simultaneously in assignment
• KT-71174 Illegal scope used
• KT-72407 FirImplementationByDelegationWithDifferentGenericSignatureChecker: FirLazyExpression should be calculated before accessing
• KT-72228 K2: Reformat doesn't work in project with Kotlin 2.0.21
• KT-69671 TYPES phase contract violation through JavaSymbolProvider
• KT-71348 K2: KotlinIllegalStateExceptionWithAttachments: 'By now the annotations argument mapping should have been resolved' during code inspection
• KT-72024 FirClassVarianceChecker: Expected FirResolvedTypeRef with ConeKotlinType but was FirImplicitTypeRefImplWithoutSource
• KT-71746 K2 IDE. ISE: Zero or multiple overrides found for descriptor in FirRegularClassSymbol serializing/ExternalSerializer and red code on @Serializer(forClass) ` usage

Analysis API. Infrastructure

• KT-72922 KotlinFakeClsStubsCache project leakage
• KT-71988 Improve scripts test coverage by LL FIR
• KT-64687 K2: Analysis API: migrate AbstractFirLibraryModuleDeclarationResolveTest to kotlin repo

Analysis API. Light Classes

• KT-73492 K2. FP error in Java file when using @JvmSuppressWildcards annotation without arguments
• KT-66763 K2: Get rid of context receivers in Analysis API and LL API
• KT-71781 SLC: migrate SLC from KotlinModificationTrackerService to KotlinModificationTrackerFactory
• KT-67963 K2: PsiInvalidElementAccessException on redeclaration of class with constructor
• KT-71407 K2: Do not report @JvmField default value as PsiField initializer in K2
• KT-72078 K2 PSI change for constructor parameter with value class type

Analysis API. Providers and Caches

• KT-69247 Analysis API: Invalidate sessions after builtins modification events
• KT-72704 ISE: No 'org.jetbrains.kotlin.fir.scopes.impl.FirDelegatedMembersFilter'(53) in array owner: LLFirBuiltinsAndCloneableSession for Builtins for JS/wasm-js (JS)
• KT-67148 Analysis API: Introduce a weak reference cache for the original KtSymbol in KtSymbolPointer
• KT-73395 Analysis API: JavaElementPsiSourceWithSmartPointer contains strong references to PSI
• [KT-72390](https://youtrack.jetbrains.com/issue/KT-...

Kotlin 2.1.20-RC3

Changelog

Compiler

• KT-75578 K2: False negative [SUPER_CALL_WITH_DEFAULT_PARAMETERS] when calling the upper-class implementation of a method with the default value argument
• KT-75965 The iOS app did not run successfully in Release mode

Native

• KT-75807 CMP caching fails for iOS with Kotlin 2.1.20-RC2

Kotlin 2.1.20-RC2

Changelog

Compiler

• KT-75649 K2: NPE on assigning platform type value to non-nullable lateinit var
• KT-75483 Native: redundant unboxing generated with smart cast
• KT-75526 Regression in K2 scripting: local name doesn't shadow one from the implicit receiver
• KT-75444 Contradictions in the constraint system are ignored in case of multiple constraints from forking points
• KT-75111 False negative "This declaration needs opt-in" for usage of enum entry with OptIn marker in another module
• KT-74764 Native: merge init nodes generated within the same LLVM module for the same klib

Compose compiler

• CMP-7571 1.8.0-alpha03 incompatible with Compose based on k1
• b/397855145 Fix "Unknown file" error in target annotation inference

JavaScript

• KT-75606 KJS: java.lang.AssertionError: Different declarations with the same signatures were detected
• KT-72437 KJS. Invalid copy method for inherited JSO with type parameters

Klibs

• KT-75393 Non-JVM artifacts from Kotlin 2.1.20-RC fail on 2.1.x releases due to IMPLICIT_ARGUMENT

Native

• KT-70202 Xcode 16 Linker fails with SIGBUS

Tools. Compiler Plugins

• KT-73897 PowerAssert: Implicit argument detection is brittle in a number of cases

Tools. Gradle

• KT-73842 Gradle: AGP failing tests with "Failed to calculate the value of property 'generalConfigurationMetrics'" using KGP
• KT-74394 KGP + isolated projects: "Something has been appended to this collector already"
• KT-75262 Gradle test-fixtures plugin apply order breaks the project
• KT-75277 FUS statistics: 'java.lang.IllegalStateException: The value for this property cannot be changed any further' exception is thrown during project import

Tools. Gradle. JS

• KT-75485 KJS: "Module not found: Error: Can't resolve 'style-loader' and 'css-loader'" in 2.1.20-RC

Kotlin 2.1.20-RC

Changelog

Compiler

• KT-74929 False positive TYPE_PARAMETER_OF_PROPERTY_NOT_USED_IN_RECEIVER if it is used with T&Any
• KT-74227 K2: "Cannot infer type for this parameter. Please specify it explicitly" caused by lambda in another lambda with a parameterized function type
• KT-74474 K2: Report more precise diagnostic when last expression of non-unit lambda is a statement
• KT-74478 K2: False negative RETURN TYPE_MISMATCH if the last statement of a lambda is indexed assignment
• KT-74203 K2: False negative NO_ELSE_IN_WHEN of a generic type with star projection <*> bounded by a sealed hierarchy

Compose compiler

• b/377499888 Allow restarting overridden functions in a final class
• b/390151896 Fix default arguments with varargs in @Composable functions
• b/388030459 Prevent usage of transitive captures in lambda memoization
• b/310004740 Check vararg parameter length in skipping logic
• b/393400768 Use -1 for .changed call if nullable enum parameter is null

Native

• KT-74377 Kotlin Native: release executable crashes with error 139

Tools. Compiler Plugins

• KT-74102 "Lambda cannot be cast to class kotlin.jvm.functions.Function0" in 2.1.20-Beta1 with Compose
• KT-75159 Compose: Missing 'FunctionKeyMeta' annotation on lamdas declared in non-composable function

Tools. Gradle

• KT-74997 Unexpected KGP warnings about kotlin scripting plugin
• KT-75026 Corrupted NonSynchronizedMetricsContainer in parallel Gradle build
• KT-74846 Gradle Configuration Cache miss on second build with 2.1.20-Beta2
• KT-74462 Flaky Kotlin Gradle Plugin Tests: IsInIdeaEnvironmentValueSource$Inject not found

Tools. Gradle. JS

• KT-74869 KJS: jsBrowserProductionWebpack does not minify output with 2.1.20-Beta2
• KT-74859 Gradle configuration cache issues related to RootPackageJsonTask

Tools. Gradle. Multiplatform

• KT-74669 Executable binaries for JVM: a jar generated by jvmJar task isn't added to the build/install/testAppName/lib directory
• KT-66542 Gradle: JVM target with withJava() produces a deprecation warning
• KT-37964 Gradle application/distribution plugin does not copy and name jar files correctly when using installDist task for multiplatform project
• KT-30878 It's impossible to have .java sources in a Multiplatform Gradle Project with Android, because android() and jvm { withJava() } targets can not be applied to one and the same Gradle Project
• KT-66962 Kapt with Kotlin Multiplatform: Cannot query the value of this provider because it has no value available
• KT-71074 Optimize Granular Metadata Dependencies Transformation for Import after adding support for Project Isolation
• KT-74727 Dependency resolve from a single target KMP module to another kmp module fails on non-found PSM
• KT-74832 Relax JVM target validation diagnostic in KMP/Jvm projects

Tools. Gradle. Native

• KT-74403 :commonizeNativeDistribution fails when configured native targets cannot be built on machine

Tools. Kapt

• KT-75202 K2 kapt: mapped type class literal is converted incorrectly

Kotlin 2.1.20-Beta2

Changelog

Analysis API

• KT-73156 AA: type retrieval for erroneous typealias crashes
• KT-68198 Analysis API: Support application service registration in plugin XMLs
• KT-69630 KAPT User project builds with KAPT4 enabled fail with Metaspace overflow

Analysis API. FIR

Performance Improvements

• KT-74012 Redundant FirAbstractBodyResolveTransformerDispatcher.<init> CPU consumption
• KT-73900 ContextCollectorVisitor#computeContext may spend significant time on createSnapshot
• KT-73665 FirElementFinder is inefficient in large files
• KT-73330 Remove bodies from functions without contracts after the CONTRACTS phase

Fixes

• KT-74097 ISE: Recursive update at org.jetbrains.kotlin.analysis.low.level.api.fir.caches.FirCaffeineCache.getValue
• KT-74098 ISE: Recursive update at org.jetbrains.kotlin.analysis.low.level.api.fir.caches.FirCaffeineCache.getValue
• KT-73079 K2: Internal compiler error when conflicting type aliases are present
• KT-73456 Expected FirResolvedContractDescription but FirRawContractDescriptionImpl found for FirSimpleFunctionImpl
• KT-73259 Expected FirResolvedContractDescription but FirLegacyRawContractDescriptionImpl found for FirSimpleFunctionImpl
• KT-72740 FirDanglingModifierList: lazyResolveToPhase(STATUS) cannot be called from a transformer with a phase STATUS
• KT-69671 TYPES phase contract violation through JavaSymbolProvider

Analysis API. Light Classes

• KT-73492 K2. FP error in Java file when using @JvmSuppressWildcards annotation without arguments

Analysis API. Providers and Caches

• KT-69247 Analysis API: Invalidate sessions after builtins modification events
• KT-72704 ISE: No 'org.jetbrains.kotlin.fir.scopes.impl.FirDelegatedMembersFilter'(53) in array owner: LLFirBuiltinsAndCloneableSession for Builtins for JS/wasm-js (JS)
• KT-67148 Analysis API: Introduce a weak reference cache for the original KtSymbol in KtSymbolPointer

Analysis API. Standalone

• KT-73776 Analysis API Standalone: Application services are missing registrations in tests and Dokka

Analysis API. Surface

New Features

• KT-73414 Analysis API: Support typealiased constructors in KaConstructorSymbol

Performance Improvements

• KT-74112 UI freeze: AnyThreadWriteThreadingSupport.getWritePermit
• KT-73942 Extend resolveToSymbols cache to all references
• KT-73622 Cache resolveToSymbols result
• KT-72684 Drop explicit resolve from KaFirJavaInteroperabilityComponent#asPsiTypeElement

Fixes

• KT-70114 K2: Analysis API: do not lazy resolve declarations without deprecation to get it deprecation
• KT-73406 [Analysis API] Allow extending KaModule resolution scope for all KaModules
• KT-65850 Cover Analysis API with KDocs
• KT-73662 KotlinIllegalArgumentExceptionWithAttachments: Expected FirResolvedTypeRef with ConeKotlinType but was FirUserTypeRefImpl
• KT-70108 Analysis API: "KaScopeProvider.scopeContext" provides scopes from implicit companion objects with inaccessible classifiers
• KT-68954 Remove JAR publications with old artifact names (high-level-api family)
• KT-70134 Analysis API: Port API documentation from the guide to KDoc
• KT-72973 Introduce KaSymbolOrigin.TYPE_ALIAS_CONSTRUCTOR

Backend. Wasm

• KT-71645 [Wasm] Check wasm test runner for groupByPackage=true case
• KT-73907 Wasm: Duplication of files in browser distribution
• KT-71868 K/Wasm: support generating debug information in DWARF format

Compiler

New Features

• KT-74049 Introduce special override rule to allow overriding T! with T & Any
• KT-61447 Support context receivers overloads in Kotlin multiplatform
• KT-73255 Change defaulting rule for annotations
• KT-73256 Implement all meta-target for annotations

Performance Improvements

• KT-73434 Slow / infinite compile involving ConeInferenceContext
• KT-73328 Do not spill this to a local variable in coroutines
• KT-69995 K2: Slow compilation when star projecting mutually recursive bounds from java
• KT-73687 Inefficient KtCommonFile#getFileAnnotationList

Fixes

• KT-70789 CLI error "mixing legacy and modern plugin arguments is prohibited" on using -Xcompiler-plugin unless default scripting plugin is disabled
• KT-74024 K2: Prohibit declaring local type aliases
• KT-73858 Compose / iOS: NullPointerException on building
• KT-73864 [Native] Decouple IrType.computePrimitiveBinaryTypeOrNull from backend.native
• KT-73122 Move the upgrade references lowering to be first one in Native pipeline
• KT-73608 K2: "Initializer type mismatch" with map and typealias to object
• KT-74104 Native: SynchronizedLazyImpl produces NPE on 2.1.20-Beta1 on mingwX64
• KT-74147 K2: False negative INCONSISTENT_TYPE_PARAMETER_VALUES
• KT-73454 K2: Fix type parameters mapping for typealiases with inner RHS
• KT-73043 K2 Compiler does not allow references to inner constructors with typealiases
• KT-74040 Compilation of inner class usage does not check the visibility of parent class during compilation in different rounds
• KT-74195 Fully qualified names in error messages make them complicated
• KT-74221 Make FirSupertypesChecker a platform checker
• KT-72962 Consider enabling ConsiderForkPointsWhenCheckingContradictions LF earlier
• KT-74242 Freeze on runCatching call in finally block inside SAM conversion
• KT-73903 Design 'replaceWith' / 'test-only' kinds for the 'LanguageFeature' class
• KT-29222 FIR: consider folding binary expression chains
• KT-73760 Cannot implement two Java interfaces with @NotNull-annotated type argument and Kotlin's plain (nullable) type parameter
• KT-58933 Applying suggested signature from WRONG_NULLABILITY_FOR_JAVA_OVERRIDE leads to red code
• KT-74107 K2: Calling type alias constructor with inner RHS in static scope causes runtime crash
• KT-74244 Context parameters: context isn't checked for expect/actual property declaration
• KT-74276 Update ASM from 9.0 to 9.6.1
• KT-72295 K2: Generated accessors for delegated property should have property source
• KT-73150 Investigate/test approximation of context parameter type in completion
• KT-73862 [Native] Decouple NativePreSerializationLoweringContext from backend.native
• KT-72677 K2 IDE / Kotlin Debugger: “Couldn't find virtual file for p1/MainKt$foo$iface$1” on evaluating inline function from another module
• KT-72672 K2 ...

Kotlin 2.1.10

Changelog

Compiler

• KT-73858 Compose / iOS: NullPointerException on building
• KT-73454 K2: Fix type parameters mapping for typealiases with inner RHS
• KT-73043 K2 Compiler does not allow references to inner constructors with typealiases
• KT-74040 Compilation of inner class usage does not check the visibility of parent class during compilation in different rounds
• KT-73339 K2: "VerifyError: Bad type on operand stack" because of missing implicit cast on generic field receiver with star projection
• KT-72585 K2: Compilation failure when upgrading to Kotlin 2.0.20+: Cannot replace top-level type with star projection: S
• KT-73399 compile-time JVM codegen failure on a KProperty argument of a KSuspendFunction parameter
• KT-72725 KMP: Unsupported actualization of inherited java field in expect class
• KT-73153 K2: Standalone diagnostics on type arguments are not reported

Compose compiler

• CMP-5680 Compose compiler: unexpected stability warnings for classes compiled with 2.0.10
• b/381407900 Avoid adding Compose annotations on synthetic classes

IR. Inlining

• KT-73981 [2.1.10] Suppress checkIncorrectCrossFileDeclarationAccess warning for Compose <class>$stable field access

JavaScript

• KT-70778 Kotlin Js companion is undefined in production build
• KT-73130 KJS: Missed break for do/while in generated JS code
• KT-58797 Optimize the code generated for objects on JS and Wasm backends

Klibs

• KT-70146 [KLIB Resolve] Don't fail on nonexistent transitive dependency
• KT-73951 Workaround for "Partial linkage engine may not patch some discrepancies in IR when compiling Kotlin/Native static caches" in 2.1.10

Native

• KT-73559 K/Native: AndroidNativeArm64 linking fails starting from Kotlin 2.1.0

Tools. CLI

• KT-73967 JDK 25: "IllegalArgumentException: 25-ea" with EA builds

Tools. Daemon

• KT-73311 "Unable to release compile session, maybe daemon is already down" flakiness

Tools. Gradle

• KT-73728 'generatePomFileForMavenPublication' creates pom with dependencies with 'unspecified' version

Tools. Gradle. Multiplatform

• KT-73620 KMP 2.1.0: Transitive dependency is broken when setting publication groupId

Tools. Gradle. Native

• KT-73572 [Gradle] kotlin.native.cacheKind=none doesn't work anymore
• KT-71419 Light bundle KGP IT run against a stable K/N version

Kotlin 2.1.10-RC2

Changelog

Compiler

• KT-73858 Compose / iOS: NullPointerException on building
• KT-74040 Compilation of inner class usage does not check the visibility of parent class during compilation in different rounds

Compose compiler

• b/381407900 Avoid adding Compose annotations on synthetic classes
• CMP-5680 Compose compiler: unexpected stability warnings for classes compiled with 2.0.10

Kotlin 2.1.10-RC

Changelog

Compiler

• KT-73454 K2: Fix type parameters mapping for typealiases with inner RHS
• KT-73043 K2 Compiler does not allow references to inner constructors with typealiases
• KT-73339 K2: "VerifyError: Bad type on operand stack" because of missing implicit cast on generic field receiver with star projection
• KT-72585 K2: Compilation failure when upgrading to Kotlin 2.0.20+: Cannot replace top-level type with star projection: S
• KT-73399 compile-time JVM codegen failure on a KProperty argument of a KSuspendFunction parameter
• KT-72725 KMP: Unsupported actualization of inherited java field in expect class
• KT-73153 K2: Standalone diagnostics on type arguments are not reported

Compose compiler

• CMP-5680 Compose compiler: unexpected stability warnings for classes compiled with 2.0.10

IR. Inlining

• KT-73981 Cherry-pick the fix for KT-73482 to 2.1.10

JavaScript

• KT-58797 Optimize the code generated for objects on JS and Wasm backends
• KT-70778 Kotlin Js companion is undefined in production build
• KT-73130 KJS: Missed break for do/while in generated JS code

Klibs

• KT-73951 Workaround for "Partial linkage engine may not patch some discrepancies in IR when compiling Kotlin/Native static caches" in 2.1.10

Native

• KT-73559 K/Native: AndroidNativeArm64 linking fails starting from Kotlin 2.1.0

Tools. CLI

• KT-73967 JDK 25: "IllegalArgumentException: 25-ea" with EA builds

Tools. Daemon

• KT-73311 "Unable to release compile session, maybe daemon is already down" flakiness

Tools. Gradle

• KT-73728 'generatePomFileForMavenPublication' creates pom with dependencies with 'unspecified' version

Tools. Gradle. Multiplatform

• KT-73620 KMP 2.1.0: Transitive dependency is broken when setting publication groupId

Tools. Gradle. Native

• KT-73572 [Gradle] kotlin.native.cacheKind=none doesn't work anymore
• KT-62826 Show a warning when KGP and K/N versions mismatch
• KT-71419 Light bundle KGP IT run against a stable K/N version