Kotlin 2.2.20-Beta2

Changelog

Analysis API. Code Compilation

• KT-78382 K2 IR lowering error when interface extends interface
• KT-73201 K2 IDE: Error while evaluating expressions with local classes
• KT-78164 Evaluator: '@JvmName' annotations are not recognized in other modules

Analysis API. FIR

• KT-72227 SOE from recursive value class
• KT-68977 K2 IDE: Reference to companion object through typealias in a function call does not work
• KT-76490 Do not load ast during the contracts phase if no contracts present
• KT-72407 FirImplementationByDelegationWithDifferentGenericSignatureChecker: FirLazyExpression should be calculated before accessing

Analysis API. Light Classes

• KT-78065 Support "Expose boxed inline value classes" in Light Classes
• KT-78835 Find usages of a light constructor from a class with an empty body finds usages of class as well

Analysis API. Providers and Caches

• KT-78640 Analysis API: Remove "friend builtins provider" from FirDeclarationForCompiledElementSearcher

Analysis API. Standalone

• KT-78638 Analysis API Standalone: Stdlib builtins are not indexed in STUBS deserialized declaration origin mode

Analysis API. Surface

New Features

• KT-73473 Provide KaExpressionInformationProvider.isUsedAsResultOfLambda

Performance Improvements

• KT-78526 Get rid of redundant checkValidity from withPsiValidityAssertion

Fixes

• KT-78820 K2: ISE "FIR element class FirErrorExpressionImpl is not supported in constant evaluation" through RedundantValueArgumentInspection
• KT-75057 Analysis API: Reference to object through typealias in invoke operator call leads to original type
• KT-79042 Do not restore KaTypePointer if target kind has changed
• KT-72421 AA: "KtReference.resolveToSymbols" returns empty list when ASSIGN_OPERATOR_AMBGUITY error is present
• KT-63464 AA: KtPsiTypeProvider#asPsiType doesn't substitute kotlin.Unit
• KT-75913 K2: SymbolLightLazyAnnotation evaluates arguments and replaces them with constants
• KT-73184 Analysis API: KaFunctionCall.argumentMapping is unexpectedly deparenthesised
• KT-78613 PSI: add binary compatibility checks
• KT-74013 Analysis API: Cover the API surface with @SubclassOptInRequired annotations
• KT-76614 Move the parser and lexer to a separate module
• KT-78552 KaFunctionValueParameter is not marked as KaLifetimeOwner
• KT-71152 Add back SubclassOptInRequired to classes in KaModule.kt
• KT-77674 Analysis API: Redundant smart cast to the original type

Backend. Wasm

New Features

• KT-65721 K/Wasm: stop unconditionally exporting any main function from the root package

Fixes

• KT-73931 WASM: "RuntimeError: illegal cast" with nullable generic
• KT-65403 [WASM] RuntimeError is thrown instead of ClassCastException
• KT-79317 [Wasm] Do not throw CCE for ExcludedFromCodegen declarations
• KT-66085 K/WASM: Runtime error is uncaught with catch (e: Throwable)
• KT-66072 K/Wasm: improve how exceptions work in JS interop
• KT-78384 K/Wasm: Incorrect debug info of local declarations in inline function from another file
• KT-71533 K/Wasm + K2: no error on KClass::qualifiedName usages
• KT-72220 Wasm: Unclear exception in case of missed dependency
• KT-71691 No trace on Wasm/JS if an error occurred in initializing global variables in a file with the main function
• KT-69570 K/Wasm: JsExport with default parameter value compiles to invalid Wasm

Compiler

New Features

• KT-78792 Report warning for redundant return in expression body
• KT-45683 Allow generics in contract type assertions
• KT-71244 Incorporate existing @CheckReturnValue annotation(s) into Kotlin's unused return value checker
• KT-32313 Support contracts for operator functions
• KT-76766 Warning is missing for wrong subclass checking
• KT-65688 Generate when-expressions over final classes via invokedynamic typeSwitch + tableswitch on JDK 21+

Performance Improvements

• KT-78672 Consider having FirCallableSymbol.callableId null for local properties / parameters
• KT-77839 K2: consider not creating CallableId for value parameters / variables / fields

Fixes

• KT-79355 Failed to fix the problem of desugared inc with new reverse implies returns contract
• KT-79277 Implies returns contract doesn't affect the return type of the function if it is in the argument position
• KT-79271 Implies returns contract doesn't impact exhaustiveness
• KT-79218 SMARTCAST_IMPOSSIBLE for top‑level extension‑property getter despite returnsNotNull contract
• KT-79220 returnsNotNull contract ignored on extension function with nullable receiver
• KT-79442 "Multiple annotations of type kotlin.coroutines.jvm.internal.DebugMetadata": 2.2.0-Beta1 generates broken code with JVM default suspend methods in interfaces
• KT-79354 IllegalStateException: Debug metadata version mismatch. Expected: 1, got 2 with compiler 2.2.20-Beta1 and stdlib 2.2.0
• KT-78479 IR lowering failed / Unexpected null argument for composable call
• KT-77401 [FIR] ParameterNameTypeAttribute.name doesn't support @ParameterName with compile-time constant property argument
• KT-77986 K2: False negative: "Local classes are not yet supported in inline functions"
• KT-78843 FIR tree: comments within String concatenation aren't visited in 2.2.0
• KT-76477 Kotlin/Native: fix compiler performance reporting in sources->klib and klibs->binary
• KT-78589 "Class does not have member field" caused by delegation from a Java to Kotlin class
• KT-79076 'IllegalStateException: Cannot serialize error type: ERROR CLASS: Uninferred type' with Exposed column using recursive generic type
• KT-78726 Split runPsiToIr phase into runPsiToIr and runIrLinker
• KT-77672 K/N: come up with a fallback strategy for the casts optimization pass
• KT-76585 K2: RETURN_IN_FUNCTION_WITH_EXPRESSION_BODY is not reported inside initializers of local variables
• KT-79099 K2: Do not inherit inline modifier
• KT-76902 Omit type-use annotations from diagnostics
• KT-79085 Adding -Xreturn-value-checker=full to kotlinc causes "error: conflicting overloads"
• KT-58988 K2: Deprecate exposing package-private parameter of internal method
• KT-77199 OPT_IN_USAGE_ERROR is still absent when calling the enum primary constructor
• KT-72800 K2: java.util.NoSuchElementException when introduce variable
• KT-79056 Add experimental language version 2.5
• [KT-78351...

Kotlin 2.2.10-RC

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

Kotlin 2.2.20-Beta1

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...

Kotlin 2.2.0

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 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...

Kotlin 2.2.0-RC3

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

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

Kotlin 2.2.0-RC

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

Kotlin 2.1.21

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

Kotlin 2.1.21-RC2

Changelog

Tools. Gradle. JS

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

Kotlin 2.2.0-Beta2

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 ...