Releases · JetBrains/kotlin

Changelog

Compiler

KT-78501 K2: Missing [ABSTRACT_SUPER_CALL] diagnostics for delegated interface method leads to AssertionError: isCompiledToJvmDefault during IR lowering
KT-78479 IR lowering failed / Unexpected null argument for composable call
KT-76477 Kotlin/Native: fix compiler performance reporting in sources->klib and klibs->binary
KT-78736 Missing [NOT_YET_SUPPORTED_IN_INLINE] diagnostics because of incorrect context update
KT-77685 "IllegalArgumentException: Sequence contains more than one matching element"
KT-76365 K2: Missing ABSTRACT_SUPER_CALL
KT-78352 False-positive IDENTITY_SENSITIVE_OPERATIONS_WITH_VALUE_TYPE when comparing with equality operator (==)

Compose compiler

KT-78479 Ensure that default transform affects functions entered through a call
KT-78490 Fix visibility for default wrappers of protected methods
b/408492167 Emit parameter names in Compose source information

Native. Runtime. Memory

KT-78925 Crash SIGABRT on Apple Watch after updating Kotlin to 2.2.0

Tools. CLI

KT-77445 UNRESOLVED_REFERENCE when importing classes from kotlin-stdlib
KT-78263 java.lang.NoClassDefFoundError: Could not initialize class com.intellij.psi.impl.PsiSubstitutorImpl
KT-78318 Unresolved reference when compiling kotlin/JS project on fresh master

Tools. Compiler Plugins

KT-78490 "AssertionError: SyntheticAccessorLowering should not attempt to modify other files" when calling protected open composable with default argument
KT-78038 Make jvm-abi-gen compiler plugin output classloader-friendly

Tools. Gradle

KT-77023 Support creating KotlinJvmAndroidCompilation in KotlinBaseApiPlugin

Tools. Gradle. JS

KT-78504 [2.2.0-RC3] NPM Tasks in 2.2 RCs produce broken/unusable build cache entries

Tools. Gradle. Multiplatform

KT-77466 KMP - testFixturesApi and similar configurations do not affect jvmTestFixtures source set
KT-68646 Compose extension's metrics/reports dir should use subdirs based on target

Tools. Gradle. Native

KT-77977 "Unknown hardware platform: riscv64" on JVM project build

Tools. Incremental Compile

KT-78807 Changing ABI fingerprint on non-ABI changes when lambda passed to inlined function

Tools. Kapt

KT-77853 K2 KAPT: backend internal error: exception during IR fake override builder

Changelog

Analysis API

KT-78187 Synthetic properties not to be shown as callables
KT-72525 K2. red code and KIWA on new-lines in guarded when conditions (with parentheses)
KT-61728 Analysis API: optimize AllCandidatesResolver.getAllCandidates

Analysis API. Code Compilation

KT-76457 K2 IDE / KMP Debugger: KISEWA “Cannot compile a common source without a JVM counterpart” on evaluating inline fun from common module inside jvm
KT-73084 K2 evaluator cannot resolve local variables standing at the closing brace

Analysis API. FIR

Performance Improvements

KT-78132 Do not check FirElementBuilder#tryGetFirWithoutBodyResolve optimization for already resolved declarations

Fixes

KT-72357 Implement partial body resolution
KT-77629 K2: NPE: "org.jetbrains.kotlin.fir.java.declarations.FirJavaTypeParameter.performFirstRoundOfBoundsResolution"
KT-76855 Analysis API: KaType.asPsiType returns null for a local inner class in dependent analysis tests
KT-72718 ImplicitReceiverValue.createSnapshot creates invalid FIR if receiver is smart-casted
KT-76811 Analysis API: resolveToFirSymbol finds a FirPropertySymbol for a KtScript in dependent analysis
KT-73586 [Analysis API] Add lazyResolveToPhase(STATUS) before accessing modifiers of members
KT-71135 AA: exception from sealed inheritors checker when analyzeCopy
KT-75534 K2 AA: "Containing declaration should present for nested declaration class KtNamedFunction" with dangling annotation on top-level anonymous function
KT-75687 K2: local variable doesn't get to the do-while scope
KT-56543 LL FIR: rework lazy transformers so transformers modify only declarations they suppose to

Analysis API. Infrastructure

KT-76809 Analysis API: Dependent analysis tests frequently work with the original element instead of the copied element

Analysis API. Light Classes

KT-78076 DLC: KotlinDeclarationInCompiledFileSearcher missed accessors if types are boxed
KT-77569 SLC: annotation missing from generated no-args constructor
KT-75182 K2 AA. False positive red code "Unresolved reference" to a Kotlin method in Java when Kotlin uses a value class with @JvmOverloads
KT-77564 Constructor with JvmOverloads and value class shouldn't mark regular constructors private
KT-77505 K2: find usages on java accessor methods do not detect kotlin property accessor usages
KT-76789 Annotation resolve shouldn't search through non-class members
KT-76907 Wrong equality between repeatable annotation and container

Analysis API. Providers and Caches

KT-74907 Analysis API: Apply platform-based library module content restrictions consistently
KT-77578 Analysis API: Performance degradation of KaBaseResolutionScope.contains after introduction of library restriction scopes
KT-77605 AA: Leaking KaDanglingFileModule through IdeKotlinPackageProvider
KT-62474 Analysis API: Improve mergeability and performance of custom search scopes
KT-77022 Get rid of ExpectBuiltinPostProcessor workaround
KT-77248 Delegation of JavaModuleResolver is restricted to CliJavaModuleResolver
KT-76850 LLFirLibrarySession cannot be cast to LLFirResolvableModuleSession
KT-76952 Analysis API: when exhaustiveness analysis fails for sealed classes in dangling files
KT-72390 Kotlin project full of red code

Analysis API. Stubs and Decompilation

KT-77496 Support HAS_MUST_USE_RETURN_VALUE metadata flags in FirStubBasedMemberDeserializer
KT-77778 Function receivers doesn't have annotations
KT-77777 Receiver annotations shouldn't be present on types
KT-77538 Support default property accessors with annotations
KT-77763 Decompiled stubs miss inline modifier for property accessors
KT-77309 Decompiled property from annotation constructor with default value should have a constant initializer
KT-77168 Prefer DataInputOutputUtil for serialization/deserialization
KT-77117 Flaky WRONG_ANNOTATION_TARGET diagnostic
KT-76791 Function signature types are deserialized inconsistently
KT-76947 Support functional types with context parameters

Analysis API. Surface

New Features

KT-77278 Implement psi-based KaFirKotlinPropertyKtPropertyBasedSymbol#hasBackingField
KT-70770 KaLocalVariableSymbol: support isLateInit

Fixes

KT-75913 K2: SymbolLightLazyAnnotation evaluates arguments and replaces them with constants
KT-78278 ISE: FIR element "class org.jetbrains.kotlin.fir.expressions.impl.FirErrorResolvedQualifierImpl" is not supported in constant evaluation at org.jetbrains.uast.kotlin.internal.FirKotlinUastConstantEvaluator.evaluate
KT-73327 Cover all psi inputs with scope validity assertions
KT-71876 Support storing parameter names in KaFunctionType
KT-77738 AA: inconsistent KaType.allSupertypes regarding multiple iterations
KT-73723 K2 AA, KaFirVisibilityChecker: protected member of superclass is not visible from anonymous object
KT-78057 [Analysis API, K2] Context parameters are not resolved in KDoc
KT-73758 K2 Mode: "KaEvaluator.evaluate" does not work for simple arithmetic expressions
KT-72301 K2 AA. PSI should present for declaration built by Kotlin code on property access syntax of generic Java getter through Kotlin subclass
KT-77730 K2: Unable to get a light PSI for a nested annotation used with fully-qualified name
KT-73216 K2: unresolvable references in type parameters
KT-71794 Analysis API: Types with errors have unresolved qualifiers in lambda parameters position
KT-65846 Support parameter names in functional type rendering
KT-76738 K2 AA: rendering constructor of sealed class inserts protected modifier
KT-77515 KaTypeProvider#receiverType should be more tolerant to an error code
KT-77333 K2 AA: KaFirTypeProvider.getType: InvalidFirElementTypeException: For TYPE_REFERENCE with text I, unexpected element of type: FirSuperReceiverExpressionImpl found
KT-76044 K2 AA: isFun is true for restored symbol of Java interface with several methods
KT-77264 KaTypeProvider#type should be more tolerant to an error code
KT-77282 KaPropertySymbol: support isDelegatedProperty for libraries
KT-77254 K2 AA: expectedType doesn't provide anything for parameter default value
KT-74777 KaVariableSymbol.hasBackingField returns incorrect result for libraries
KT-77280 Rename KaPropertyAccessorSymbol#isCustom to isNotDefault
KT-77210 Analysis API: `scopeContex...

Changelog

Analysis API

KT-73337 Migrate analysis sources to new IR parameter 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
KT-69535 Redesign 'containingSymbol'
KT-69950 Analysis API: Introduce isSubtypeOf(ClassId)
KT-68393 Analysis API: Rename KaClassLikeSymbol. classIdIfNonLocal to classId
KT-62924 Analysis API: rename KtCallableSymbol.callableIdIfNonLocal -> callableId

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 10000 fixes
KT-74524 Compilation exception with incorrect JvmName annotation arguments
KT-74443 Compilation peer collector ignores inline property accessors

Analysis API. FIR

New Features

KT-73493 Support context parameters

Performance Improvements

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

Fixes

KT-76331 Cleanup FileStructureElement for classes
KT-73117 K2 AA: Exception "Setter is not found" when val has a setter without body
KT-76540 K2: Missing library dependency on Android SDK from androidx.activity-1.8.2 causes LiveEdit failures
KT-73266 K2. "Declaration should have non-local container" with unclosed annotation on top-level function
KT-76432 JavaClassUseSiteMemberScope: Expected FirResolvedTypeRef with ConeKotlinType but was FirUserTypeRefImpl
KT-76217 K2 AA: "No fir element was found for KtParameter" with multiple context parameter lists
KT-74740 Highlighting is broken after the built-in serialization refactoring
KT-76366 ContextCollector: annotations on class members don't have the class as implicit receiver
KT-76352 ContextCollector: wrong class annotation context in BODY mode
KT-76341 ContextCollector: support dangling modifiers
KT-76332 "Declaration should have non-local container" for declaration inside file annotation
KT-76115 Disable FirElementBuilder#getFirForElementInsideAnnotations optimization for files, classes and scripts
KT-76347 ContextCollector: avoid resolution for enum entry annotations
KT-76272 Cleanup AbstractFileStructureTest
KT-75542 K2 AA: "FirDeclaration was not found for class KtNamedFunction, fir is class FirErrorExpressionImpl" for unclosed annotation on member function
KT-73719 K2. "FirDeclaration was not found for class KtDestructuringDeclaration, fir is class FirBlockImpl" on incorrect chain call
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-74818 K2 AA: "FirDeclaration was not found for class KtTypeParameter, fir is null" with TYPE_PARAMETERS_NOT_ALLOWED on anonymous function
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-73405 Get rid of KtElement#{symbolPointer, symbolPointerOfType} API usages
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-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

Performance Improvements

KT-62115 Analysis API: Package providers are not cached per search scope
KT-74463 Analysis API: LLNativeForwardDeclarationsSymbolProvider queries its cache even when the ClassId cannot represent a native forward declaration

Fixes

KT-74541 Analysis API: Include files generated by resolve extensions in KaModule content scopes
KT-64236 Analysis API: Introduce a separate module for fallback dependencies of library source modules
KT-74090 Analysis API: Support dumb mode (restricted analysis)
KT-63780 Analysis API: Invalidate resolvable library sessions when binary library modules are modified
KT-72388 KaFirStopWorldCacheCleaner: Control-flow exceptions
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...

Changelog

Compiler

KT-77301 False positive Context Parameter resolution when using DslMarker

JavaScript

KT-78073 K/JS: KProperty from local delegate changes after another delegate is invoked

Klibs

KT-78168 K/N: "IndexOutOfBoundsException: Index 3 out of bounds for length 3" for iOS build with Kotlin 2.2.0-RC2

Changelog

Backend. Wasm

KT-77622 K/Wasm: investigate CMP crash on mobile Safari

Compiler

KT-77220 Annotation with EXPRESSION is not allowed on lambdas in Kotlin 2.2.0

Compose compiler

b/420729503 Avoid copying @Deprecated annotations on Compose compiler stubs
b/417412949 Emit fake line number for skipToGroupEnd branch

IR. Tree

KT-77508 K/JS and K/Native CompilationException Wrong number of parameters in wrapper

JVM. Reflection

KT-77663 Reflection: java.util.ServiceConfigurationError: "module kotlin.reflect does not declare uses" when using kotlin-reflect in modular mode

Tools. CLI

KT-77445 UNRESOLVED_REFERENCE when importing classes from kotlin-stdlib

Tools. Gradle. Multiplatform

KT-77404 The kotlin-stdlib and annotations are missing from commonTest dependencies with 2.2.0-Beta1

Changelog

Compiler

Fixes

KT-77259 Confusing message for ANNOTATION_WILL_BE_APPLIED_ALSO_TO_PROPERTY_OR_FIELD
KT-77219 "@Composable annotation is not applicable" on vararg @Composable () -> Unit in Kotlin 2.2.0
KT-77397 Report UNSUPPORTED_CONTEXTUAL_DECLARATION_CALL when calling declaration with contextual function type in signature
KT-74470 NSME on calling in runtime internal constructor of value class with default arg from tests
KT-77137 K2: Controversial behavior allows resolving annotation arguments on a companion inside it
KT-77150 Native: compilation fails with an assertion error
KT-76357 K2: a nested class annotation observes member declarations of the outer class
KT-77283 Binary compatibility of FirDeclarationChecker
KT-75457 Native: cache machinery uses stdlib cache with default runtime options even if custom runtime options are supplied when partial linkage is disabled
KT-76898 K2: ClassCastException when data class shadows supertype's componentX method with wrong type
KT-77078 K2: anonymous object is wrongly allowed to implement interfaces by unsafe Delegation
KT-77001 Leave ForbidParenthesizedLhsInAssignments as a warning

Compose compiler

CMP-7873 Native build fails with "e: Compilation failed: Exception during generating code for following declaration"
b/412584977 Fix false positive for overriding open functions from older dependencies

JavaScript

KT-77418 KJS: cannot debug with whole-program granularity
KT-77271 KJS / Serialization: "Cannot set property message of Error which has only a getter"
KT-69591 KJS / d.ts: Wrong type of SerializerFactory for abstract classes
KT-42305 KJS / IR: "Class constructor is marked as private" @JsExport produces wrong TS code for sealed classes
KT-52563 KJS / IR: Invalid TypeScript generated for class extending base class with private constructor

Native

KT-76992 Native: update llvm for windows targets

Native. Build Infrastructure

KT-77349 Kotlin/Native: default cache for stdlib is unused

Tools. Gradle

KT-76138 Compile against Gradle API 8.14
KT-76139 Run integration tests against Gradle 8.14
KT-76137 Compatibility with Gradle 8.14 release
KT-76797 KGP: StdlibDependencyManagementKt.configureStdlibVersionAlignment() triggering eager configuration realization
KT-77288 Using 'KotlinJvmOptions' is an error - Gradle sync issue when using 2.2.0-Beta2 with Android Gradle Plugin
KT-77035 A compiler diagnostic isn't reported when its severity is set to warning with Gradle
KT-73142 Kotlin Gradle plugin: Remove usage of Gradle's internal ExecHandleBuilder
KT-75823 Resources bundle with XCFrameworks for iOS

Tools. Gradle. JS

KT-77119 KJS: Gradle: Setting custom environment variables in KotlinJsTest tasks no longer works

Tools. Gradle. Native

KT-77067 Kotlin Gradle plugin with the configuration cache passes all platform libraries to the compiler when compiling a binary for the first time

Tools. Wasm

KT-76948 Wasm: Rename kotlinBinaryenSetup and kotlinD8Setup

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

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-75588 [2.1.20-RC] "was compiled by a pre-release version of Kotlin and cannot be loaded by this version of the compiler" warnings despite using the same compiler version
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-73682 Compatibility with Gradle 8.12 release
KT-73142 Kotlin Gradle plugin: Remove usage of Gradle's internal ExecHandleBuilder
KT-36004 Update 'org.gradle.usage' attribute rules to support the 'JAVA_API' and 'JAVA_RUNTIME' value
KT-73968 KotlinDependencyManagement tries to mutate configuration after it was resolved
KT-73684 Run integration tests against Gradle 8.12
KT-72694 Accessing Task.project during execution is being deprecated in Gradle 8.12
KT-73683 Compile against Gradle API 8.12

Tools. Gradle. JS

KT-77119 KJS: Gradle: Setting custom environment variables in KotlinJsTest tasks no longer works
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
KT-75883 Follow-up: switch from INSTANCE heuristic to outerClass chain

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

Changelog

Tools. Gradle. JS

KT-77119 KJS: Gradle: Setting custom environment variables in KotlinJsTest tasks no longer works

Changelog

Analysis API

KT-73337 Migrate analysis sources to new IR parameter API
KT-68393 Analysis API: Rename KaClassLikeSymbol. classIdIfNonLocal to classId
KT-62924 Analysis API: rename KtCallableSymbol.callableIdIfNonLocal -> callableId
KT-63718 Analysis API: Stub-based dependency symbol providers of library source sessions compute the wrong package name sets

Analysis API. FIR

Fixes

KT-76540 K2: Missing library dependency on Android SDK from androidx.activity-1.8.2 causes LiveEdit failures
KT-73266 K2. "Declaration should have non-local container" with unclosed annotation on top-level function
KT-76432 JavaClassUseSiteMemberScope: Expected FirResolvedTypeRef with ConeKotlinType but was FirUserTypeRefImpl
KT-76217 K2 AA: "No fir element was found for KtParameter" with multiple context parameter lists
KT-76366 ContextCollector: annotations on class members don't have the class as implicit receiver
KT-76352 ContextCollector: wrong class annotation context in BODY mode
KT-76341 ContextCollector: support dangling modifiers
KT-76332 "Declaration should have non-local container" for declaration inside file annotation
KT-76331 Cleanup FileStructureElement for classes
KT-76115 Disable FirElementBuilder#getFirForElementInsideAnnotations optimization for files, classes and scripts
KT-76347 ContextCollector: avoid resolution for enum entry annotations
KT-76272 Cleanup AbstractFileStructureTest
KT-75542 K2 AA: "FirDeclaration was not found for class KtNamedFunction, fir is class FirErrorExpressionImpl" for unclosed annotation on member function
KT-73117 K2 AA: Exception "Setter is not found" when val has a setter without body
KT-73719 K2. "FirDeclaration was not found for class KtDestructuringDeclaration, fir is class FirBlockImpl" on incorrect chain call

Analysis API. Providers and Caches

KT-74541 Analysis API: Include files generated by resolve extensions in KaModule content scopes
KT-64236 Analysis API: Introduce a separate module for fallback dependencies of library source modules
KT-63780 Analysis API: Invalidate resolvable library sessions when binary library modules are modified

Analysis API. Stubs and Decompilation

KT-71787 PsiRawFirBuilder.Visitor#visitStringTemplateExpression forces AST loading

Analysis API. Surface

KT-76018 K2: Stop the wold leads to deadlock/freeze
KT-73669 Support psi-based symbol pointer for implicit primary constructors
KT-76011 KaFirNamedClassSymbol#companionObject doesn't provide generated objects generated by compiled plugins
KT-76008 Provide PSI-based implementation for KaFirNamedClassSymbol#companionObject

Backend. Native. Debug

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

Backend. Wasm

KT-76747 [Wasm] Wasm name section absent for wasm structs
KT-76701 K/Wasm: custom formatters are not loaded when a project is built with incremental compilation
KT-66081 K/WASM: 0/0, 5/0 and 5%0throw not ArithmeticException, but RuntimeError
KT-76287 [Wasm] Enable stdlib and kotlin.test tests after compiler bootstrap
KT-75871 [Wasm] Implement new RTTI approach
KT-75872 Wasm / IC: IllegalStateException: IC internal error: can not find library
KT-73362 Migrate K/Wasm sources to new IR parameter API

Compiler

New Features

KT-70722 Implement better Kotlin warnings for value classes and JEP 390 (Warnings for Value-Based Classes)
KT-57919 Store all annotations in Kotlin metadata on JVM under a flag
KT-54205 Support jakarta Nullability annotations

Performance Improvements

KT-76422 FirJavaFacade#createFirJavaClass: do not compute super type references right away

Fixes

KT-75828 Store backing field/delegate annotations and extension receiver annotations in metadata
KT-76663 KJS: KotlinNothingValueException caused by expression return since 2.1.20
KT-76615 K2: "IllegalArgumentException: Inline class types should have the same representation: Lkotlin/UByte; != B" for mixed Java/Kotlin code
KT-76805 Wrong NPE occurs when assigning synthetic properties with platform types in Kotlin 2.1.20
KT-76253 K2 Compiler: Less precise diagnostic COMPONENT_FUNCTION_AMBIGUITY for flexible type
KT-76583 CCE: suspend lambda attempts to unbox value class parameter twice after lambda suspended
KT-59526 Store annotation default values in metadata on JVM
KT-63850 K2: setter with an annotated parameter has isNotDefault == false flag in metadata
KT-75712 -Wextra: false positive UNUSED_LAMBDA_EXPRESSION on functional type variable assignment with inferred type
KT-69624 Debugger: Missing local variable in Variables view (inline function)
KT-75992 Xcode 16.3: stacktraces on simulators are not symbolicated
KT-76199 Introduce -Xcontext-sensitive-resolution compiler flag
KT-75553 MISSING_DEPENDENCY_SUPERCLASS and MISSING_DEPENDENCY_SUPERCLASS_WARNING is reported at the same time on the same element
KT-76159 Obsolete error "'@JvmDefaultWithCompatibility' annotation is only allowed on interfaces" should be removed
KT-76660 False negative RETURN_NOT_ALLOWED in lambda in default argument leads to NoClassDefFoundError: $$$$$NON_LOCAL_RETURN$$$$$
KT-76301 Fail to infer types after syntactical change
KT-74999 K2: KotlinNothingValueException within Extension Function
KT-76675 KIAEWA exception at KaFirDataFlowProvider with non-local return from nested inline call
KT-75756 Backend Internal error: Exception during IR lowering when trying to access variable from providedProperties in class within kotlin custom script
KT-76171 "KotlinIllegalArgumentExceptionWithAttachments: Expected expression 'FirSingleExpressionBlock' to be resolved"
KT-76345 Enhance variable fixation
KT-76578 [FIR, K1/K2 Regression] lateinit is allowed on loop parameters
KT-76448 FirOverrideChecker: class ClsMethodImpl is not a subtype of class KtNamedDeclaration for factory VIRTUAL_MEMBER_HIDDEN
KT-73360 Migrate K/JVM sources to new IR parameter API
KT-76606 Enable 'Indy: Allow lambdas with annotations' by default
KT-74852 Kotlin/Native: allow caches for thread state checker and sanitizers
KT-76130 IR evaluator does not support array literals in annotation parameter default values
KT-76436 Missing K2 checker: non-local return through lambda passed to inline f/o
KT-74326 False negative: no variable must be initialized ...

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

Releases: JetBrains/kotlin

Kotlin 2.2.10-RC

Changelog

Compiler

Compose compiler

Native. Runtime. Memory

Tools. CLI

Tools. Compiler Plugins

Tools. Gradle

Tools. Gradle. JS

Tools. Gradle. Multiplatform

Tools. Gradle. Native

Tools. Incremental Compile

Tools. Kapt

Uh oh!

Kotlin 2.2.20-Beta1

Changelog

Analysis API

Analysis API. Code Compilation

Analysis API. FIR

Performance Improvements

Fixes

Analysis API. Infrastructure

Analysis API. Light Classes

Analysis API. Providers and Caches

Analysis API. Stubs and Decompilation

Analysis API. Surface

New Features

Fixes

Uh oh!

Kotlin 2.2.0

Changelog

Analysis API

Analysis API. Code Compilation

Analysis API. FIR

New Features

Performance Improvements

Fixes

Analysis API. Infrastructure

Analysis API. Light Classes

Analysis API. Providers and Caches

Performance Improvements

Fixes

Uh oh!

Kotlin 2.2.0-RC3

Changelog

Compiler

JavaScript

Klibs

Uh oh!

Kotlin 2.2.0-RC2

Changelog

Backend. Wasm

Compiler

Compose compiler

IR. Tree

JVM. Reflection

Tools. CLI

Tools. Gradle. Multiplatform

Uh oh!

Kotlin 2.2.0-RC

Changelog

Compiler

Fixes

Compose compiler

JavaScript

Native

Native. Build Infrastructure

Tools. Gradle

Tools. Gradle. JS

Tools. Gradle. Native

Tools. Wasm

Uh oh!

Kotlin 2.1.21

Changelog

Backend. Native. Debug

Compiler

Native

Native. C and ObjC Import

Native. Runtime. Memory