chore(deps): update kotlin monorepo to v2.2.21 (!384) · Merge requests · O.W.S / open source / Spring Demo Kubernetes

This MR contains the following updates:

Package	Change	Age	Confidence
org.jetbrains.kotlin.plugin.spring (source)	`2.1.20` -> `2.2.21`
org.jetbrains.kotlin.kapt (source)	`2.1.20` -> `2.2.21`
org.jetbrains.kotlin.jvm (source)	`2.1.20` -> `2.2.21`

Release Notes

JetBrains/kotlin (org.jetbrains.kotlin.plugin.spring)

`v2.2.21`

Backend. Wasm

KT-81372 K/Wasm: JsException: Exception was thrown while running JavaScript code on Safari 18.2/18.3
KT-80018 K/Wasm: exceptions don't work properly in JavaScriptCore (vm inside Safari, WebKit)

Compiler

KT-81191 K2: "null cannot be cast to non-null type ConeTypeParameterLookupTag" with invalid code
KT-80936 NON_PUBLIC_CALL_FROM_PUBLIC_INLINE : @PublishedApi doesn't work for fun interfaces

JavaScript

KT-79926 Wrong export of interfaces with companions with ES Modules
KT-81424 Kotlin/JS: Cannot Get / in a simple running application
KT-80873 KJS: Stdlib requires ES2020-compatible JS engine due to BigInt type literal

Native

KT-79384 K/N: Application Not Responding: Thread Deadlock

Tools. Gradle

KT-79047 Gradle compileKotlin fails with configuration cache
KT-81148 Publishing helpers in KGP are incompatible with Isolated Projects
KT-80950 KGP breaks configuration cache when signing plugin with GnuPG is applied

Tools. Gradle. Multiplatform

KT-61127 Remove scoped resolvable and intransitive DependenciesMetadata configurations used in the pre-IdeMultiplatformImport IDE import
KT-81249 Kotlin 2.2.20 broke KMP implementation of Parcelize

Tools. Gradle. Native

KT-81510 commonizeCInterop exception with 'kotlinNativeBundleConfiguration' not found
KT-81134 Native: Gradle configuration failure likely related to Klibs cross-compilation
KT-77732 commonizeCInterop failed with "Unresolved classifier: platform/posix/size_t"
KT-80675 Commonized cinterops between "test" compilations produce an import failure

Tools. Maven

KT-81218 Kotlin Maven Plugin 2.2.20: Java classes not resolved with enabled incremental compilation without daemon

Tools. Wasm

KT-80582 Multiple reloads when using webpack dev server after 2.2.20-Beta2

`v2.2.20`

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-74246 KaVisibilityChecker.isVisible is inefficient with multiple calls on the same use-site

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
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-76490 Do not load ast during the contracts phase if no contracts present
KT-78132 Do not check FirElementBuilder#tryGetFirWithoutBodyResolve optimization for already resolved declarations

Fixes

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-72357 Implement partial body resolution
KT-76932 Support context parameters on dangling modifier list
KT-72407 FirImplementationByDelegationWithDifferentGenericSignatureChecker: FirLazyExpression should be calculated before accessing
KT-77602 K2 / Analysis API: KAEWA “No fir element was found for KtParameter” on incorrect context()-call
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-78835 Find usages of a light constructor from a class with an empty body finds usages of class as well
KT-78878 K2. Method shown as unavailable in Java when @JvmExposeBoxed is applied (redundantly) at both class and method level in Kotlin
KT-78065 Support "Expose boxed inline value classes" in 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-77578 Analysis API: Performance degradation of KaBaseResolutionScope.contains after introduction of library restriction scopes
KT-78640 Analysis API: Remove "friend builtins provider" from FirDeclarationForCompiledElementSearcher
KT-74907 Analysis API: Apply platform-based library module content restrictions consistently
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. Standalone

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

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-73473 Provide KaExpressionInformationProvider.isUsedAsResultOfLambda
KT-77278 Implement psi-based KaFirKotlinPropertyKtPropertyBasedSymbol#hasBackingField
KT-70770 KaLocalVariableSymbol: support isLateInit

Performance Improvements

KT-78526 Get rid of redundant checkValidity from withPsiValidityAssertion

Fixes

KT-77674 Analysis API: Redundant smart cast to the original type
KT-76577 Guard KaFirStopWorldCacheCleaner from deadlocks via threads waiting
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-78628 K2. Setting Receiver=true in Change Signature produces parameter of regular function type receiver instead of extension function type
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-73184 Analysis API: KaFunctionCall.argumentMapping is unexpectedly deparenthesised
KT-73327 Cover all psi inputs with scope validity assertions
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-71876 Support storing parameter names in KaFunctionType
KT-77738 AA: inconsistent KaType.allSupertypes regarding multiple iterations
KT-75358 K2 AA, KaFirVisibilityChecker: private member of anonymous object is not visible inside it
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: scopeContext shows implicit receiver with a class instance in the class constructor
KT-77196 Clarify differences between KaPropertyAccessorSymbol#{isDefault, hasBody}
KT-76580 K2: No expected type for the second+ vararg argument
KT-76750 K2. internal exception 'Unable to provide inlay hint' on typo in nested lambdas
KT-73290 Analysis API: Improve the architecture of content scopes and resolution scopes
KT-73055 Get rid of the deprecated Analysis API API
KT-70199 K2: ConcurrentModificationException at FirCallCompleter$LambdaAnalyzerImpl.analyzeAndGetLambdaReturnArguments

Backend. Wasm

New Features

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

Performance Improvements

KT-70097 Optimize shared primitive variables in Native and Wasm

Fixes

KT-80106 devServer in Kotlin/Wasm overwrites defaults, causing missing static paths
KT-80018 K/Wasm: exceptions don't work properly in JavaScriptCore (vm inside Safari, WebKit)
KT-66072 K/Wasm: improve how exceptions work in JS interop
KT-77897 WasmJs: ClassCastException when using star-projection with nullable transformation in generic extension function
KT-71533 K/Wasm + K2: no error on KClass::qualifiedName usages
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-78036 K/Wasm: generate a message with "expected" and "actual" types in case of CCE
KT-78384 K/Wasm: Incorrect debug info of local declarations in inline function from another file
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-67554 [Wasm] Consider to have reference equals or/and equals for function references
KT-71521 K/Wasm: incorrect results on equality checks for capturing property references
KT-71522 K/Wasm: incorrect results on equality checks for function references
KT-69570 K/Wasm: JsExport with default parameter value compiles to invalid Wasm
KT-71517 K/Wasm: KClass::qualifiedName for local classes and objects returns non-null value
KT-68309 WASM: Anonymous class simpleName returns "" instead of null
KT-77272 K/Wasm: Remove kotlin.wasm.internal.ClosureBox* classes from the standard library
KT-66106 Wasm: lambda was not invoked in test lambda2.kt
KT-77855 [Wasm] Improve virtual function calls speed for lambdas
KT-77501 Wasm: unsigned vararg compiles to invalid Wasm
KT-76775 [Wasm] Inconsistent FP mod operation
KT-77464 Wasm: KType.toString() has simple names even with -Xwasm-kclass-fqn
KT-77465 Wasm: KTypeParamter printed without variance information

Compiler

New Features

KT-71768 Enable -Xjvm-default=all-compatibility by default to generate JVM default interface methods
KT-78374 Make indy lambda function name generation more consistent
KT-45683 Allow generics in contract type assertions
KT-27090 Support contracts in getter and setter for top-level extension properties
KT-76766 Warning is missing for wrong subclass checking
KT-71244 Incorporate existing @CheckReturnValue annotation(s) into Kotlin's unused return value checker
KT-73256 Implement all meta-target for annotations
KT-78792 Report warning for redundant return in expression body
KT-32313 Support contracts for operator functions
KT-70722 Implement better Kotlin warnings for value classes and JEP 390 (Warnings for Value-Based Classes)
KT-65688 Generate when-expressions over final classes via invokedynamic typeSwitch + tableswitch on JDK 21+
KT-54344 Trigger the unused expression warning for interpolated strings, even when the expression may have side effects
KT-74807 Implement 'full' unused return value checker mode
KT-77653 K/N: an optimization pass to remove redundant type checks
KT-64477 Enhance KotlinLightParser to make it able to parse scripts
KT-74809 Support unnamed local variables
KT-72941 ANNOTATIONS_ON_BLOCK_LEVEL_EXPRESSION_ON_THE_SAME_LINE missing in K2
KT-75061 Support context-sensitive resolution in type position

Performance Improvements

KT-77993 Optimize old PSI/LightTree Kotlin parser
KT-78672 Consider having FirCallableSymbol.callableId null for local properties / parameters
KT-77839 K2: consider not creating CallableId for value parameters / variables / fields
KT-74981 Kotlin/Native: large binary size for iOS target in 2.1.0(LLVM16)
KT-77838 K2: consider replacing LinkedHashMap with HashMap inside scopes and scope session
KT-76698 Android Studio compose preview holds read lock 700ms for KaCompilerFacility API
KT-68677 Kotlin compilation issue when using EnumMap and Pair

Fixes

KT-79979 K2: ClassCastException when overriding extension property with delegation
KT-67146 UPPER_BOUND_VIOLATED missing on implicit type arguments
KT-76477 Kotlin/Native: fix compiler performance reporting in sources->klib and klibs->binary
KT-79866 kotlinc 2.2.0 silently emits 'NonExistentClass' instead of reporting an error
KT-78666 "Platform declaration clash" caused by indy lambda name generation which generates conflicting names
KT-80285 IJ monorepo: broken compilation after 2.2.20-RC update
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-78589 "Class does not have member field" caused by delegation from a Java to Kotlin class
KT-79816 Java Interfaces implemented by delegation have non-null return checks
KT-78097 False positive NO_ELSE_IN_WHEN on sealed interface with negative is check
KT-77182 A function in a file annotated with @file:MustUseReturnValue doesn't produce a warning when it is used from compiled code
KT-79085 Adding -Xreturn-value-checker=full to kotlinc causes "error: conflicting overloads"
KT-75268 K2: Implement the new compilation scheme for MPP (compiler part)
KT-78843 FIR tree: comments within String concatenation aren't visited in 2.2.0
KT-77401 [FIR] ParameterNameTypeAttribute.name doesn't support @ParameterName with compile-time constant property argument
KT-73611 Remove -Xextended-compiler-checks in favor of a deprecation cycle
KT-79276 Dexing fails with "Cannot read field X because is null" with 2.2.0
KT-79781 Missing MISSING_DEPENDENCY_CLASS when using type alias with inaccessible RHS
KT-78621 false-positive type mismatch error on value of nullable type as value of platform type
KT-79547 "UnsupportedOperationException: Not supported" with inlining and value classes
KT-52706 Bad signature for generic value classes with substituted type parameter
KT-79519 Nested type alias is unreachable from another module
KT-76839 False-negative MISSING_DEPENDENCY_CLASS on parameter of data class constructor
KT-78352 False-positive IDENTITY_SENSITIVE_OPERATIONS_WITH_VALUE_TYPE when comparing with equality operator (==)
KT-78815 Symbol not found: __ZNSt3__117bad_function_callD1Ev error on iOS 15.5 simulator in Xcode 16.3 after update to 2.2.0-Beta2
KT-25341 NOT_YET_SUPPORTED_IN_INLINE reported over anonymous object border
KT-77099 'all' annotation target is not a soft keyword
KT-76478 FIR: Implement IDE-only checker for types exposed in inline function
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-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-77986 K2: False negative: "Local classes are not yet supported in inline functions"
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-76365 K2: Missing ABSTRACT_SUPER_CALL
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-64499 Report error on overloading by order of context parameters
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-17460 Diagnostics and intention on suspend function that is overriden with non-suspend one.
KT-78351 Plugins: VIRTUAL_MEMBER_HIDDEN caused by FirSupertypeGenerationExtension
KT-78527 No LESS_VISIBLE_TYPE_ACCESS_IN_INLINE_WARNING is reported when a private companion object is accessed via the class name
KT-79045 FirExpectActualMatcherTransformer should not visit bodies
KT-74570 K2: Linenumber for annotation on property is present in LVT
KT-74569 K2: Linenumber of annotation is present in constructor's LVT
KT-64731 K2: Annotation on inline function or inside inline function is hit by debugger
KT-77756 Add experimental language version 2.4
KT-78837 linkReleaseFrameworkIosArm64: Compilation failed: An interface expected but was Any
KT-78945 CONTRACT_NOT_ALLOWED is not reported for local operator functions
KT-78944 ANNOTATION_IN_CONTRACT_ERROR is not reported for operators and property accessors with contracts
KT-78943 ERROR_IN_CONTRACT_DESCRIPTION is not reported for operators and property accessors with contracts
KT-78932 Contracts are allowed for open and overridden property accessors
KT-77203 FIR: Consider adding destructured type to all COMPONENT_FUNCTION_* diagnostics
KT-76635 Implement Data-Flow Based Exhaustiveness Support
KT-78805 K2: False positive METHOD_OF_ANY_IMPLEMENTED_IN_INTERFACE
KT-78651 No need to report LESS_VISIBLE_TYPE_ACCESS_IN_INLINE_WARNING in noinline default value lambda
KT-78849 K2: [Wasm, Fir2IR] Invalid smartcast on overloaded function call
KT-78793 Make feature AllowEagerSupertypeAccessibilityChecks experimental
KT-78736 Missing [NOT_YET_SUPPORTED_IN_INLINE] diagnostics because of incorrect context update
KT-78324 K2: False negative [INCONSISTENT_TYPE_PARAMETER_VALUES]
KT-69975 KDoc: cannot reference elements with names in backticks
KT-78229 KDoc: unable to reference a method with spaces in the name
KT-78047 Render unnamed context parameters as _ instead of
KT-74621 Debugger: AssertionError on evaluating two suspending calls
KT-78784 Improve deprecation warnings about KTLC-284
KT-76826 New inference error [NewConstraintError at Incorporate TypeVariable] caused by recursive generics and nullable expected type
KT-77685 "IllegalArgumentException: Sequence contains more than one matching element"
KT-78028 "FirNamedFunctionSymbol" leaks to the error message about missing infix modifier
KT-77245 Add expression name to RETURN_VALUE_NOT_USED diagnostic
KT-78071 False-positive NO_ELSE_IN_WHEN after variable reassignment
KT-78068 False-positive NO_ELSE_IN_WHEN after excluding enum value with inequality check
KT-71134 Consider to get rid of CapturedTypeMarker.withNotNullProjection()
KT-77131 getValue/setValue can be declared with more than two/three parameters
KT-78452 Drop redundant frontend structures after fir2ir conversion
KT-78458 Don't populate PredicateBasedProvider if no lookup predicates are registered
KT-78440 Lambda with an implicitly runtime-retained annotation is generated via invokedynamic with -Xindy-allow-annotated-lambdas=false
KT-77709 Missing diagnostics of accessing less visible objects in inline function
KT-77577 False positive exposed type warnings
KT-77095 FIR: Report warnings on exposure of references to invisible references in inline functions
KT-76981 Move exposed type checker to regular checkers
KT-78252 ClassCastException when Array<Void> used for compile-time vararg of Nothing
KT-77713 Context Parameters cause compiler generate r8 incompatible bytecode
KT-71854 K2 IDE. False positive red code because of external annotation on a generic parameter
KT-67335 K2: Infers Int instead of Long for an ILT
KT-76629 K2 Mode: False positive RedundantVisibilityModifier inspection on private constructors in sealed classes
KT-77728 Drop controversial experimental checkers
KT-78429 K2: Property callable reference incorrectly smart-casted to intersection of property type and KProperty
KT-78509 Renamed for override copy functions are cached in scope instead of session
KT-17417 Loops in delegation: no compilation error on non-abstract class with abstract method that never implemented
KT-75033 Split JvmBackendPipelinePhase to be able to provide a custom implementation of writeOutputs
KT-75831 K2: An extra "[VALUE_PARAMETER_WITHOUT_EXPLICIT_TYPE] An explicit type is required on a value parameter." for a missing parameter
KT-78370 All the [something]Assign operators on dynamic return Unit as a type
KT-73950 K2 IDE / Kotlin Debugger: ISE “Fake override should have at least one overridden descriptor” on evaluation of local calss in presence of bystander
KT-78280 Implement the sourceless KtDiagnostics
KT-76543 Migrate psi2ir sources to new IR parameter API
KT-77716 Kotlin/Native and -Xseparate-kmp-compilation: "Compilation failed: Several functions kotlin/native/immutableBlobOf found"
KT-76400 Context-sensitive resolution doesn’t work in if-else condition passed as a function argument
KT-76606 Enable 'Indy: Allow lambdas with annotations' by default
KT-76739 Dubious argument type mismatch "actual type is 'String', but 'String' was expected" caused by wrong number of type arguments
KT-78121 Report warning on function type with multiple implicit values that's annotated with DSL marker
KT-76872 Anonymous context parameters are not visible in debugger
KT-74088 Kotlin Debugger: CCE on evaluating private suspend function
KT-77301 False positive Context Parameter resolution when using DslMarker
KT-78230 Add more test cases to the holdsIn contracts
KT-78111 K2: Approximation of captured star projection in function type produces Function1<Nothing?, Unit> in IR
KT-77273 K/N: Remove the kotlin.native.internal.Ref class from the standard library
KT-73995 JVM bytecode: Bad name for value class field
KT-73013 Kotlin Debugger: ISE “No mapping for symbol: VALUE_PARAMETER” on evaluating callable reference to local function with closure in it
KT-77665 K2: unresolved annotatation on local context parameter type
KT-77485 Add constraints logging to inference
KT-76504 Find and deprecate actively used parts of K1 API
KT-75338 K2 Mode: False positive "Redundant assignment" diagnostic on variable captured by local function
KT-77648 K2: False negative DSL_SCOPE_VIOLATION when using named argument for lambda with annotated function type
KT-77355 Report warning on overloading by a superset of another overload's context parameters
KT-77354 Report warning on overloading by a subtype of another overload's context parameter
KT-78084 Unify deprecation warning messages
KT-76776 @MustUseReturnValue doesn't affect nested scopes
KT-77545 @NoInfer on receiver type leads to false positive type mismatch when generic type is specified explicitly and closest implicit receiver is of incorrect type
KT-76772 @NoInfer on a context parameter's type leads to a false-positive context argument ambiguity error regardless of the closest implicit values' types if there are multiple of them at the call site
KT-76771 @NoInfer on context parameter type leads to a false-positive type mismatch when generic type is specified explicitly and closest implicit value at the call site is of a mismatching type
KT-77156 INITIALIZATION_BEFORE_DECLARATION is not reported in anonymous object
KT-78060 UNRESOLVED_REFERENCE in fp-space
KT-67555 Debug metadata: map the Continuation label to the next executable location in file
KT-77723 Refine the message for ArrayEqualityCanBeReplacedWithEquals checker
KT-75178 Inline functions in conjunction with @JvmStatic may result in bytecode errors
KT-77390 Prototype lazy loading of stdlib symbols in Native
KT-77921 False positive EXTENSION_SHADOWED_BY_MEMBER when member has context parameters
KT-77895 false-negative error on package directives with context parameter lists (even with context parameters disabled)
KT-76767 AMBIGUOUS_CONTEXT_ARGUMENT should report the name of the context parameter in addition to the type
KT-77444 K2: False negative "Unchecked cast" with casting from MutableList to MutableList
KT-63348 K2: FIR2IR should properly pass expected types
KT-77627 K2: consider getting rid of NEW_INFERENCE_ERROR
KT-75833 K2: Extra [ANNOTATION_ARGUMENT_MUST_BE_CONST] when passing regex-like strings as annotation arguments
KT-77547 Native: add a check that the logic looking for stdlib-related bitcode is not used when compiling sources to a klib
KT-77206 Remove PARAMETER_NAME_CHANGED_ON_OVERRIDE suppression in KMP lexers
KT-77679 Update syntax-api dependency in KMP Kotlin parser
KT-77705 K2: Consuming data class compiled with kotlin 1.0.5 breaks the K2 compiler
KT-76583 CCE: suspend lambda attempts to unbox value class parameter twice after lambda suspended
KT-76663 KJS: KotlinNothingValueException caused by expression return since 2.1.20
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-77563 False-positive smart cast with captured local in init block causes NPE
KT-77696 ISE "couldn't find inline method" on kotlin/Result compiled by old Kotlin version
KT-76931 K2: Annotation on do-while expression captures variables from inside the loop
KT-77183 Metadata: remove multi-field value class representation
KT-77678 Apply found optimization to Kotlin KMP parser
KT-60127 K2: Support scripts with LightTree-based raw FIR building
KT-76615 K2: "IllegalArgumentException: Inline class types should have the same representation: Lkotlin/UByte; != B" for mixed Java/Kotlin code
KT-77220 Annotation with EXPRESSION is not allowed on lambdas in Kotlin 2.2.0
KT-77656 K/N: fix the super type for local delegated properties
KT-75907 Inference/PCLA: consider storing semi-fixed variables in inference session
KT-77144 Implement KMP Kotlin parser
KT-77352 Implement KMP Expression parser
KT-76984 SYNCHRONIZED_BLOCK_ON_JAVA_VALUE_BASED_CLASS isn't reported for primitive wrapper classes instantiated within the scope
KT-67471 K2: "Unresolved reference" on incorrect term of FQ name
KT-77269 [K/N] external calls checker crashes when used with caches
KT-77205 Kotlin Debugger / Context Parameters: CCE “class FirPropertySymbol cannot be cast to class FirFunctionSymbol” on evaluating class property
KT-74133 FIR: use EmptyDeprecationsPerUseSite consistently in symbols
KT-77100 java.lang.Void type is not ignorable
KT-77491 K2: No SUPERTYPE_IS_EXTENSION_FUNCTION_TYPE when using typealias
KT-77490 Report error on contextual function type in supertype
KT-77431 Functional type with a context is allowed as an upper-bound
KT-77432 Context isn't passed properly when functional type with a context is used as a type argument
KT-77417 There is no TYPE_VARIANCE_CONFLICT_ERROR when 'out' type is used in context
KT-62631 Improve expect-actual "checking" incompatibilities reporting
KT-77481 Support ExpectRefinement feature in HMPP compilation scheme
KT-77268 Make sure that -Xreturn-value-checker also enables -XX:UnnamedLocalVariables
KT-65719 K1/K2: Nullness defaults from subclass unsoundly applied to method in superclass
KT-53836 In type-parameter declarations, recognize JSpecify annotations only on bounds
KT-73658 JSpecify @NonNull annotation on type-parameter bound prevents type-variable usages from being platform types
KT-77000 Leave ForbidInferOfInvisibleTypeAsReifiedOrVararg as a warning
KT-74084 K2: False negative [NO_ELSE_IN_WHEN]
KT-77451 FirLazyResolveContractViolationException for test with overridden delegate
KT-77397 Report UNSUPPORTED_CONTEXTUAL_DECLARATION_CALL when calling declaration with contextual function type in signature
KT-77137 K2: Controversial behavior allows resolving annotation arguments on a companion inside it
KT-77257 Report compilation error when in generated JVM bytecode there is a need for CHECKCAST of the conditional expression to the inaccessible interface
KT-77256 Report compilation error when in generated JVM bytecode there is a need for CHECKCAST of the functional call result to the inaccessible interface
KT-76356 K2 evaluation fails on evaluating inline methods if there is an inline with AutoCloseable
KT-73786 Evaluator: cannot evaluate inline methods with reified parameter
KT-77204 Native: XCode strip command causes flaky tests
KT-77351 Implement KMP KDoc parser
KT-76914 compile-time failure on a type argument placeholder in a callable reference
KT-76597 False negative opt-in required on delegated constructor call
KT-76667 Mark the class implementation of interface function with ACC_BRIDGE in the class file
KT-77181 K2: a nested typealias annotation observes member declarations of the outer class
KT-77180 K2: Wrong scope for annotation arguments in the constructor header
KT-77287 Try enforcing source != null when origin == Source
KT-76135 K2: drop pre-1.8 language features from compiler code
KT-77231 Reflection: CCE on resuming coroutine after callSuspend if result is a generic inline class substituted with primitive
KT-77031 Investigate the actual need of deduplicating provider in HMPP compilation scheme
KT-77050 Implement KMP KDoc lexer
KT-77048 Implement KMP Kotlin lexer
KT-77044 Consolidate, refine and update jFlex dependency
KT-77252 It is impossible to declare an unnamed variable in a script
KT-58137 K2: ISE "Usage of default value argument for this annotation is not yet possible" when instantiating Kotlin annotation with default parameter from another module
KT-77140 Protect ConstraintSystemCompletionMode.UNTIL_FIRST_LAMBDA with opt-in
KT-76898 K2: ClassCastException when data class shadows supertype's componentX method with wrong type
KT-75695 Bogus "Assigned value is never read" warning for prefix ++ operator
KT-76805 Wrong NPE occurs when assigning synthetic properties with platform types in Kotlin 2.1.20
KT-77078 K2: anonymous object is wrongly allowed to implement interfaces by unsafe Delegation
KT-72722 Treat 'copy' calls of a data class as explicit constructor usages
KT-77149 IllegalArgumentException: source must not be null
KT-76806 K2: AIOOBE in FirEqualityCompatibilityChecker
KT-72391 KJS: (a * b).toDouble_ygsx0s_k$ is not a function
KT-76950 K2: "IllegalArgumentException: Inline class types should have the same representation: Lkotlin/UByte; != B" with nullable UByte
KT-76043 Native: NotImplementedError: Generation of stubs for class org.jetbrains.kotlin.ir.symbols.impl.IrFieldSymbolImpl is not supported yet
KT-77126 Transitive dependency mismatch between Kotlin Gradle Plugin and Scripting dependencies
KT-72831 ANNOTATION_USED_AS_ANNOTATION_ARGUMENT missing in some cases in K2
KT-73707 Remove dependency on ":compiler:backend.jvm" from Native
KT-75499 CheckerContext#{containingDeclaration, containingFile} in checkers should return symbols
KT-76548 False positive TYPE_MISMATCH when resolving an expression with the expected type from the upper bound
KT-76142 K2: @RequiresOptIn warning does not display the custom message when using concatenated strings.
KT-68699 Kotlin Debugger: UPAE “lateinit property parent has not been initialized” on trying evaluate enumValues(), enumEntries() from inlined function with reified parameter
KT-63267 K2: incorrect line numbers after smart cast of an extension receiver
KT-71309 Kotlin Debugger: UnsupportedOperationException on calling method with reified type parameter
KT-74912 K2: Investigate irrelevant ARGUMENT_TYPE_MISMATCH on top-level lambdas
KT-74657 K2: Linenumber for annotation on local variable is present in LVT
KT-76749 NONE_APPLICABLE message is unreadable for stdlib context function
KT-74932 Investigate false-negative ARGUMENT_TYPE_MISMATCH on a nested anonymous function
KT-74545 Redundant TYPE_MISMATCH in variable initializer with call
KT-76774 K2: Simplify ResolutionMode.WithExpectedType contracts
KT-76689 Unnamed local variable with type and without initializer is allowed
KT-76746 ClassCastException: class org.jetbrains.kotlin.fir.types.impl.FirUserTypeRefImpl cannot be cast to class
KT-76754 K2: Compiler doesn't check annotations on array literals (as annotation arguments)
KT-76674 The function isn't called from unnamed local variable initializer
KT-75553 MISSING_DEPENDENCY_SUPERCLASS and MISSING_DEPENDENCY_SUPERCLASS_WARNING is reported at the same time on the same element
KT-76345 Enhance variable fixation
KT-73348 AssertionError from isCompiledToJvmDefault on super call of suspend function with composable function parameter
KT-72305 K2: Report error when using synthetic properties in case of mapped collections
KT-73527 Prohibit (via a deprecation warning) accessing nested class through generic outer class
KT-59886 K2: Disappeared ERROR_IN_CONTRACT_DESCRIPTION
KT-61227 Definitely non-nullable types cause "Any was expected" for @Nullable parameter
KT-57911 K2: Contracts are not inherited by substitution overrides
KT-47398 'null' EnhancedNullability value in String-based 'when' might produce different behavior depending on whether 'when' is "optimized" or not

Compose compiler

CMP-7505 IrLinkageError: Function can not be called: No function found for symbol
b/432262806 Fix target description lookup
b/436870733 Prevent lambda memoization in local classes inside a composable
b/432485982 Fix AbstractMethodError when overriding function with default parameters
b/432262806 Use classId as FirApplierInferencer tokens
b/400371006 Gate default parameters behind language versions
b/245673006 Specify fqName for classes and functions in build metrics
b/254577243 Avoid printing complex expressions in compiler metrics
b/394891628 Allow specifying target version of Compose runtime
b/424454512 Recreate FirApplierInferencer for each check
b/417406922 Restrict references to @Composable properties
b/282135108, b/349866442 [Compose] Enable applier checking when using FIR
b/307592552 Add BigInteger and BigDecimal to the list of known stable classes
b/414547195 Unwrap type casts when inferring @Composable call arguments

IR. Inlining

New Features

KT-70360 KLIBs: Uniformly handletypeOf() calls at 1st/2nd stages of compilation

Fixes

KT-79002 [Inliner][Native][PL] Native backend fails for inline function that instantiates a class that was compiled implementing two interfaces, which turned into abstract classes
KT-78137 Review & enable PL tests with enabled IR inliner
KT-72464 [Native][JS][Wasm] Non-local return through suspend conversion breaks the IR inliner
KT-69941 Rewrite DumpSyntheticAccessors lowering to test handler after moving common Native/JS prefix to KLIB compilation
KT-78245 Synthetic Accessors incorrectly copies default values
KT-76236 Include NativeInliningFacade and JsIrInliningFacade in all Native & JS test runners
KT-76512 Avoid using originalFunction inside FunctionInlining
KT-69457 [references] IR Inliner: References to inline functions are not inlined
KT-47521 Native & JS: Recursive inline fun calls -> StackOverflowError
KT-76425 Do not store signatures of preprocessed inline functions in KLIBs
KT-76763 [Inliner] Don't use attributeOwnerId to pass info from Inliner to non-JVM backends
KT-77102 [Inliner] Expression uses unlinked type parameter symbol
KT-76145 Enhance error message about poisoned KLIBs in KLIB-based compilers
KT-77079 IR: Report warnings on exposure of references to invisible declarations in inline functions
KT-69797 [references] Accessors for private function/constructor/property references are not generated
KT-76454 Investigate erasure of class type parameters during inliner
KT-72593 [K/N] Add NativeIrInliningFacade to CrossCompilationIdentityTest
KT-70969 IR Inliner: Ensure that common prefix at 1st phase does not affect KLIB signatures
KT-75937 [IR Inliner] Umbrella for failing tests due to public inliner
KT-77295 Improve Diagnostic Message Formatting for Private API Exposure in Inline Functions
KT-77047 Ir Ininler: crash on fake override in private class from more visible class
KT-77336 [references] Synthetic accessor test for private top-level function accessed via reference fails with No function found for symbol
KT-76761 [Inliner] non-JVM IR Inliner incorrectly uses K/JVM-specific code
KT-76712 [Inliner] No function found for symbol '/|?'
KT-76711 [Inliner] Reference to function 'privateMethod' can not be evaluated

IR. Tree

KT-77508 K/JS and K/Native CompilationException Wrong number of parameters in wrapper
KT-78978 PL tests: Drop adjust*forLazyIr() hack
KT-76813 IR validator: not all symbols/references are visited
KT-77596 Refine reuseExistingSignaturesForSymbols setting in IR serializer
KT-76723 IR validator: Check visibilities of annotations
KT-76405 Visit annotations in IrTypeVisitor and IrTreeSymbolsVisitor
KT-78033 [PL] Merge IrUnimplementedOverridesStrategy to PartiallyLinkedIrTreePatcher

JVM. Reflection

KT-77882 kotlin-reflect: KParameter.name returns "" instead of null for anonymous context parameters
KT-77879 kotlin-reflect: toString overrides of KCallable implementations do not render context parameters
KT-74529 Context parameters support in reflection
KT-52170 Reflection: typeOf<Array> gives classifier LongArray
KT-77663 Reflection: java.util.ServiceConfigurationError: "module kotlin.reflect does not declare uses" when using kotlin-reflect in modular mode

JavaScript

New Features

KT-79222 K/JS: Allow using Long in exported declarations
KT-79394 Add the possibility to write common external declarations between JS and WasmJS targets
KT-70486 K/JS: exported exception types should extend Error
KT-19016 Define accessors as enumerable

Performance Improvements

KT-57128 KJS: Use BigInt to represent Long values in ES6 mode
KT-54689 KJS: Data class equals less efficient than manually written version

Fixes

KT-69297 Deprecate referencing inlineable lambdas in js() calls
KT-77620 Fix failing IC tests on Windows
KT-77372 KJS: NullPointerException at JsIntrinsics$JsReflectionSymbols
KT-78316 KJS: List is not exported to TypeScript declaration if wrapped in Promise
KT-79644 BigInt enabled for ES 2015 despite being an ES 2020 feature
KT-79089 KJS: Could not load reporter / Cannot find module 'mocha' when running jsNode tests
KT-79916 K/JS: "Uncaught TypeError" when using 'Xes-long-as-bigint' in compose-html
KT-79050 KJS / IC: "Unexpected body of primary constructor for processing irClass"
KT-79977 KJS: Long.rotateLeft returns incorrect result when BigInts are enabled
KT-76093 Support new callable reference nodes in partial linkage in Kotlin/JS
KT-78073 K/JS: KProperty from local delegate changes after another delegate is invoked
KT-52230 KSJ IR: Applying identity equality operator to Longs always returns false
KT-6675 KotlinJS: toInt() on external Long throws error
KT-79184 K/JS: Further intrinsify BigInt-backed Long operations
KT-78701 Js and Wasm: enumValueOf does not include invalid value into an exception message
KT-55256 KJS: non-exported subclass with a no-parameter function overload doesn't compile
KT-76034 passProcessArgvToMainFunction contains the node path and script path
KT-66091 KJS, WASM: AssertionError: Illegal value: <T> in test nonReified_equality.kt
KT-78169 KJS: [NON_EXPORTABLE_TYPE] with @JsExport class if @JsStatic companion method returns an out type
KT-57192 KJS: "Exported declaration uses non-exportable return type" caused by @JsExport Promise with Unit type
KT-61183 KJS: "AssertionError: Assertion failed" from JsSuspendFunctionsLowering
KT-59326 KJS / IR: invalid code generated when using constructor parameter named default
KT-70295 KLIB stdlib: Unify intrinsics for boxing captured variables in lambdas across non-JVM backends
KT-77021 CompilationException: Encountered a local class not previously collected on inner classes inside anonymous objects
KT-77320 KJS: Big.js times() is compiled to multiply (*) operator
KT-77430 K/JS: Remove sharedBox* intrinsics from the standard library
KT-73267 KJS: IC: "FileNotFoundException": Build failures with Kotlin 2.1-RC and RC2
KT-76912 KJS: @JsStatic can't be used for companion objects implementing external interfaces
KT-77271 KJS / Serialization: "Cannot set property message of Error which has only a getter"
KT-77242 Kotlin/JS & Kotlin/Wasm backends: Artificially apply reverse topo-order after IR linkage
KT-77649 KJS: es-arrow-functions requires explicit opt-in when target is ES2015
KT-76235 [JS] Extra invalid line tmp_0.tmp00__1 = Options; in testSuspendFunction()
KT-76234 [JS] Extra invalid line Parent in testNested()
KT-76233 [JS] Extra invalid import line in testJsQualifier()
KT-77190 Migrate JS diagnostic tests to the new CLI-based test facades (1st phase only)
KT-77418 KJS: cannot debug with whole-program granularity
KT-77371 [K/N][K/JS][K/Wasm] Unify visibility rules for generated default argument stubs
KT-77148 KJS: "Uncaught TypeError: (intermediate value).l(...).m is not a function" during production build run
KT-77193 Migrate JS irText tests to the new CLI-based test facades (1st phase only)
KT-77192 Migrate JS ABI reader tests to the new CLI-based test facades (1st phase only)
KT-77187 Migrate JS box tests to the new CLI-based test facades (1st phase only)
KT-77027 Migrate 1st phase facades to the phased CLI infrastructure in JS tests
KT-69591 KJS / d.ts: Wrong type of SerializerFactory for abstract classes
KT-76027 KJS: "ReferenceError: entries is not defined": Accessing entries of an enum arbitrarily fails with println()
KT-76232 Suspend contextual function with extension receiver results in wrong values at runtime in JS
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

Klibs

New Features

KT-78699 Compiler (JS, Wasm): warn about incompatible kotlin-test/compiler pair
KT-78700 Compiler (JS, Wasm): Consider making diagnostics for incompatible kotlin-stdlib/compiler and kotlin-test/compiler pairs errors instead of warnings
KT-74815 KLIB resolver can't consume metadata klibs between source sets when abi_versions diverge
KT-68322 Compiler (JS, Wasm): warn about incompatible Kotlin stdlib/compiler pair

Fixes

KT-78168 K/N: "IndexOutOfBoundsException: Index 3 out of bounds for length 3" for iOS build with Kotlin 2.2.0-RC2
KT-75766 PL: Error on building fake override with multiple overridden members with unbound symbols in return type
KT-75757 PL: Error on building fake overrides with unbound symbols in value parameters
KT-76094 Support new callable reference nodes in partial linkage in Kotlin/Wasm
KT-78771 KLIBs: Improve zipDirAs() function that is used to produce KLIB (ZIP) archives
KT-75980 [Klib] Reduce serialized size of IrFileEntries for sparse usage of another source files
KT-78349 [Tests] Enable Partial Linkage in all tests
KT-76827 KLIB cross-compilation tests: Don't use IR hashes and metadata hashes in test data
KT-76266 Move trigger of :tools:binary-compatibility-validator:check to native/native.tests/klib-ir-inliner
KT-76725 KLIB ABI export in older version: Restore legacy directories
KT-76061 Add option for suppress warning of missing no-existent transitive klib dependencies
KT-76471 Partial linkage: add an attribute if a class is invalid
KT-75192 KLIB reader tends to extract files from the KLIB archive to a temporary directory even when this is not needed

Language Design

KT-78866 Warn implicit receiver shadowed by context parameter
KT-54363 Allow using reified types for catch parameters
KT-32993 Contract to specify that a function parameter is always true inside lambda
KT-79308 Ability to actualize empty interfaces as Any
KT-8889 Contracts: if a given function parameter is not null, the result is not null
KT-22786 Returns are not allowed for expression-body functions and are allowed when an inline lambda is added
KT-77836 Support using context parameter of a @RestrictsSuspension type as the "restricted coroutine scope"
KT-77823 Context-sensitive resolution doesn't work for subtypes of sealed types
KT-75977 False positive unresolved_reference when resolving nested member after a type check
KT-73557 Allow refining expect declarations for platform groups

Libraries

New Features

KT-76389 Provide update functions for common atomics
KT-78581 Add the KClass.isInterface property to Kotlin/JS stdlib
KT-34132 Contract for ClosedRange.contains(T?) operator
KT-73853 Provide vararg constructors for Atomic Arrays

Fixes

KT-71628 Review deprecations in stdlib for 2.1
KT-76773 stdlib: contextOf's type argument can be inferred via contextOf's context argument
KT-79489 Generate Stdlib API reference for webMain source set
KT-79080 Annotate WasmImport and WasmExport as experimental API
KT-79121 K/Wasm annotate JS-interop API as experimental
KT-78710 kotlin.wasm and kotlin.wasm.unsafe packages are missing description
KT-78709 Wasm: KClass.qualifiedName KDoc should reflect the behavior on the target
KT-78704 CharSequence.subSequence and String.substring behavior with invalid indices differs between targets
KT-78705 Float.sign and Double.sign behavior for negative zero is not documented
KT-74543 Support for context parameters in kotlinx-metadata
KT-78340 String.startsWith KDoc declares invalid exception condition
KT-78242 Move IrLinkageError to the common non-JVM part of the standard library
KT-67819 Document collection interfaces contracts

Native

KT-79075 Stuck on Kotlin_getSourceInfo_core_symbolication
KT-76178 LLVM Update: symbol '__ZnwmSt19__type_descriptor_t' missing
KT-78959 Xcode 26: fix GC stress tests
KT-78734 Finish runtime crash dump generation
KT-74662 Consider providing a way to enable stack canaries for Kotlin/Native binaries
KT-77378 [macos] Loading libraries with non resolved paths runs XProtectService
KT-61549 Kotlin/Native: remove kotlin-native/Interop/JsRuntime
KT-76563 LLVM Update: numerous "was built for newer 'macOS' version" warnings

Native. Build Infrastructure

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

Native. C and ObjC Import

KT-79571 Xcode 26 beta 4: CInteropKT39120TestGenerated.testForwardEnum failed
KT-71400 Fix disabled -fmodules testing for stdarg.h

Native. ObjC Export

New Features

KT-77488 [ObjCExport] Add explicit ObjCBlock parameter name in objc export
KT-76974 Include conflicting element in objc export warnings
KT-76338 Native, ObjCExport: Replace name mangling of special method families

Fixes

KT-55648 Native: produce smaller binaries
KT-78447 [ObjCExport] Add missing ERROR constructors, align with K1
KT-78034 ObjCExport: primitive type extension translated as static method
KT-77781 ObjCExport: support @ObjCName for function parameters and receiver parameters
KT-77592 KMP plugin uses incorrect Swift name from ObjCName annotation
KT-77625 ObjCExport: ObjCName annotation adds kotlin name swift_name
KT-77484 KotlinConf app: Invalid identifiers in ObjCHeader.render
KT-77500 IllegalStateException during generating ObjC header stubs

Native. Runtime

KT-79152 Native: unexpected thread state in kotlin::to_string

Native. Runtime. Memory

KT-78925 Crash SIGABRT on Apple Watch after updating Kotlin to 2.2.0
KT-76851 Kotlin/Native: GC scheduler MutatorAssists requestAssists and completeEpoch issue
KT-63143 Kotlin/Native: execute Cleaners on the finalizer thread

Native. Swift Export

KT-79105 ConcurrentModificationException During Swift Export Caused by Usage of Array
KT-79227 Swift Export: Fix First Release Issues
KT-78947 Implement FUS for Swift export
KT-79521 '_CoroutineScope' is inaccessible due to 'internal' protection level
KT-79181 Swift Export Fails When Using T: Comparable Generic Constraint in Kotlin Classes
KT-77650 Swift export execution tests fail with caches enabled
KT-77634 K/N: swift export tests started failing after hyper-existentials
KT-77290 Transitive Export on swift export can duplicate declarations

Tools. Build Tools API

KT-78415 Add a tool for performance reports analysing

Tools. CLI

New Features

KT-75812 Basic DSL for compiler arguments representation

Fixes

KT-78318 Unresolved reference when compiling kotlin/JS project on fresh master
KT-75968 Set proper lifecycle for all existing compiler arguments
KT-77445 UNRESOLVED_REFERENCE when importing classes from kotlin-stdlib
KT-77030 Implement setup of HMPP sessions for KLib-based compilers
KT-78578 Support for placeholder (*) and directory in -Xdump-perf
KT-78129 Compiler cannot parse -Xfragment-dependency with a comma in the path
KT-76828 Warning doesn't exist error with -Xwarning-level when the source file has no code
KT-76957 Incorrect error message when severity is set with -Xsuppress-warning and -Xwarning-level for the same diagnostic
KT-76829 UnsupportedOperationException when reenabling a taking place warning with -Xwarning-level
KT-76111 kotlinc warns about org.fusesource.jansi.internal.JansiLoader call to System.load
KT-76447 Remove -Xjps compiler argument

Tools. Compiler Plugin API

KT-78279 Make the DiagnosticReporter default way for reporting in IR plugins
KT-77157 Cannot create a symbol pointer for local class generated by FirFunctionCallRefinementExtension

Tools. Compiler Plugins

New Features

KT-78038 Make jvm-abi-gen compiler plugin output classloader-friendly
KT-77339 Update kotlin dataframe dependency to 1.0.0-dev-6925

Fixes

KT-78969 [DataFrame] Provide source elements for plugin-generated classes
KT-75265 PowerAssert: the result of invoke is displayed at the same level as value that can be confusing
KT-78490 "AssertionError: SyntheticAccessorLowering should not attempt to modify other files" when calling protected open composable with default argument
KT-77626 K2: AssertionError: FUN LOCAL_FUNCTION_FOR_LAMBDA has no continuation
KT-78671 [DataFrame] Support type parameter types in DataSchema to fix evaluate expression
KT-78439 DataFrame compiler plugin: Unresolved reference error in REPL
KT-75876 PowerAssert: don't display results for assertion operator
KT-75514 [JS][Native] Add IrPreSerializationLoweringFacade to Atomicfu test runners
KT-77719 Remove suppress INVISIBLE_REFERENCE from DataFrame plugin
KT-77691 Kotlin DataFrame plugin: IR and FIR anonymous functions have inconsistent receivers
KT-77455 kotlin-dataframe plugin throws NoClassDefFoundError in IDE
KT-77437 Kotlin DataFrame: Add configuration key to disable top level properties generator
KT-74366 Delete kotlin-android-extensions compiler plugin
KT-73364 Migrate atomicfu sources to new IR parameter API

Tools. Compiler plugins. Serialization

KT-79695 Serialization does not exclude field-less properties in 2.2.20-Beta2
KT-73365 Migrate kotlinx-serialization sources to new IR parameter API

Tools. Gradle

New Features

KT-76421 Stabilize klib cross-compilation on different platforms
KT-77107 Introduce Kotlin ecosystem plugin

Fixes

KT-80172 Error message changes depending on the order of applying 'org.jetbrains.kotlin.android' and 'AGP' 9.0+ with built-in Kotlin plugin
KT-77546 Implement basic support for HMPP compilation scheme support in KGP
KT-79034 Automatically disable cross compilation if it's not supported on the host
KT-79408 A lot of errors files are created when compile Kotlin
KT-77785 Add -fmodules option to CocoaPod dependency by default
KT-75921 Make Swift Export available by default
KT-63383 Add compiler performance metrics to Native build reports
KT-77023 Support creating KotlinJvmAndroidCompilation in KotlinBaseApiPlugin
KT-74420 Migrate kotlin-parcelize away from AGP's deprecated Variant API
KT-78233 Add ExperimentalFeatureWarning unique id
KT-67992 Cleanup deprecated code required for KSP1
KT-72341 Remove 'kotlin-android-extensions' plugin
KT-67291 Enable Project Isolation AND/OR Configuration Cache mode for Gradle Integration tests
KT-78325 Kotlin ecosystem plugin rejects compatible Gradle patch version when DCL is enabled
KT-76353 Handle migration to stable -jvm-default in KGP: replace deprecated option and suppress warnings
KT-76797 KGP: StdlibDependencyManagementKt.configureStdlibVersionAlignment() triggering eager configuration realization
KT-77163 Migrate Swift Export IT to injections
KT-76282 Add missing Android Gradle plugin versions in tests
KT-77011 Update build regression benchmarks for 2.2.0 release
KT-76138 Compile against Gradle API 8.14
KT-76139 Run integration tests against Gradle 8.14
KT-77035 A compiler diagnostic isn't reported when its severity is set to warning with Gradle
KT-76951 'distribution-base' plugin is only applied in Gradle 8.13
KT-73142 Kotlin Gradle plugin: Remove usage of Gradle's internal ExecHandleBuilder
KT-76740 Use Problems API for warning introduced in KT-75808
KT-65271 Gradle: "Mutating dependency DefaultExternalModuleDependency after it has been finalized has been deprecated " with gradle 8.6-rc-3

Tools. Gradle. Cocoapods

KT-76035 Allow extra command line arguments in PodBuildTask
KT-78387 Kotlin Cocoapods Gradle Plugin is not compatible with Gradle isolated projects
KT-79429 K/N: Cocoapods: IllegalArgumentException: "cinterop doesn't support having headers in -fmodules mode" with 2.2.20-Beta1 if explicitly not specify false for 'useClangModules'

Tools. Gradle. Compiler plugins

KT-66728 Deprecate kapt.use.k2 property

Tools. Gradle. JS

New Features

KT-75480 Add shared source set for js and wasmJs target
KT-77073 generateTypeScriptDefinitions() does not add generated .d.ts file to package.json automatically

Fixes

KT-77319 KJS / Gradle: generateTypeScriptDefinitions() generates wrong file extension when outputting ES modules
KT-79921 Web Tooling Gradle API does not respect webpack reconfiguration
KT-76996 Wasm: js tasks triggers wasm subtasks
KT-79237 Upgrade NPM dependencies versions
KT-79188 Pre-generated accessors aren't available for webMain / webTest source sets
KT-78504 [2.2.0-RC3] NPM Tasks in 2.2 RCs produce broken/unusable build cache entries
KT-77443 NPE: "NullPointerException: Cannot invoke org.gradle.api.tasks.TaskProvider.flatMap(org.gradle.api.Transformer)": ExecutableWasm.optimizeTask is accessed before initialization
KT-76987 JS, Wasm: Upgrade NPM dependencies
KT-77119 KJS: Gradle: Setting custom environment variables in KotlinJsTest tasks no longer works
KT-74735 KGP uses Gradle internal CompositeProjectComponentArtifactMetadata

Tools. Gradle. Multiplatform

New Features

KT-69790 Report human-readable error when declared dependency doesn't support required target types
KT-76446 Add kotlin-level dependency block to work the same way as commonMain/commonTest dependencies blocks

Fixes

KT-78297 FileNotFoundException in generateMetadataFile task if non-packed=false
KT-62294 kotlin-parcelize plugin does not support the new android kotlin multiplatform plugin
KT-77404 The kotlin-stdlib and annotations are missing from commonTest dependencies with 2.2.0-Beta1
KT-79559 AGP complains about configurations resolved at configuration time due to KMP partially resolved dependencies diagnostic
KT-78993 The value for property '*' property 'dependencies' is final and cannot be changed any further
KT-77843 KGP fails with Gradle 9 on ProjectDependency.getDependencyProject()
KT-79315 Early task materialization with cross-project configuration breaks configuration due to KMP partial resolution checker
KT-77466 KMP - testFixturesApi and similar configurations do not affect jvmTestFixtures source set
KT-78433 Gradle: add tracking of the new KMP compilation scheme to FUS
KT-78431 Gradle: in-process metadata compiler uses deprecated K2MetadataCompiler
KT-77414 KMP dependencies in detached source sets cause IDE resolution to write error logs: "kotlin-project-structure-metadata.json (No such file or directory)"
KT-76200 TestModuleProperties.productionModuleName for JVM module isn't present with 2.1.20-RC

Tools. Gradle. Native

KT-51301 Remove ability to use Native non-embeddable compiler jar in Gradle plugin
KT-74864 Enable exporting KDocs by default to ObjC
KT-77977 "Unknown hardware platform: riscv64" on JVM project build
KT-78838 Add default 3G max heap size for the commonizer JVM process
KT-68256 Reduce commonizer max heap size to default 3g and allow users to configure it
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. Gradle. Swift Export

KT-79554 Swift Export status diagnostic is produced even if swift export is not configured
KT-78385 Swift Export is not compatible with Gradle isolated projects
KT-79524 NoSuchMethodError: 'java.lang.String org.gradle.api.artifacts.ProjectDependency.getPath() for swift export with dependency export fro gradle < 8.11

Tools. Incremental Compile

KT-60653 IC does not handle changes in inline functions objects/lambdas correctly
KT-78807 Changing ABI fingerprint on non-ABI changes when lambda passed to inlined function
KT-69075 Incremental compilation: smartcast is impossible on field with @JvmName

Tools. JPS

KT-77347 Support file-less compatible IC approach
KT-78444 Clean up JPS code base
KT-75460 Adding @PurelyImplements annotation to a List does not cause incremental recompile of affected files
KT-50594 Fix org.jetbrains.kotlin.arguments.CompilerArgumentsContentProspectorTest

Tools. Kapt

KT-79138 K2: KAPT Java Stub Gen: Unresolved reference with @kotlin.Metadata in Java in 2.2.0
KT-79641 Kapt: too much information is printed in verbose mode
KT-79136 K2 kapt: unresolved nested class references in annotation arguments are generated without outer class names
KT-79133 K2 kapt: class literal with typealias is not expanded
KT-77853 K2 KAPT: backend internal error: exception during IR fake override builder
KT-73322 Migrate FirKaptAnalysisHandlerExtension compilation pipeline to the phased structure

Tools. Maven

KT-77587 Maven: Introduce Kotlin daemon support and make it enabled by default
KT-63688 Remove JS-related stuff from kotlin-maven-plugin

Tools. Maven. Compiler plugins

KT-77511 Add maven plugin for Kotlin DataFrame plugin

Tools. REPL

KT-78755 [K2 Repl] Redeclaring variables does not work
KT-75632 Contunue deprecation of the REPL built into kotlinc
KT-77470 [K2 Repl] Lazy Properties crash code generation
KT-76507 [K2 Repl] Delegated properties are not visible in the next snippet
KT-76508 [K2 Repl] Annotations on property accessors are not resolved
KT-75672 [K2 Repl] Serialization plugin crashes compiler backend

Tools. Scripts

KT-78378 "Explain" feature of the kotlin script fails on hidden variables

Tools. Statistics (FUS)

KT-79455 [FUS] Collect KSP plugin version
KT-77755 [FUS Pipeline] Fus file format
KT-77995 Do not collect FUS metrics on TeamCity

Tools. Wasm

KT-76842 K/Wasm: serve project sources in *DevRun tasks by default
KT-78921 K/Wasm: don't generate empty yarn.lock file
KT-75714 Wasm: Move tooling NPM dependencies outside user project
KT-70013 .gradle/yarn and .gradle/node are part of Gradle configuration cache
KT-76838 K/Wasm: No possible to set downloadBaseUrl to null for D8 and Binaryen
KT-76948 Wasm: Rename kotlinBinaryenSetup and kotlinD8Setup

`v2.2.10`

Compiler

KT-79276 Dexing fails with "Cannot read field X because is null" with 2.2.0
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-78815 Symbol not found: __ZNSt3__117bad_function_callD1Ev error on iOS 15.5 simulator in Xcode 16.3 after update to 2.2.0-Beta2
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

JavaScript

KT-79050 KJS / IC: "Unexpected body of primary constructor for processing irClass"
KT-79089 KJS: Could not load reporter / Cannot find module 'mocha' when running jsNode tests

Native

KT-79075 Stuck on Kotlin_getSourceInfo_core_symbolication
KT-76178 LLVM Update: symbol '__ZnwmSt19__type_descriptor_t' missing

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
KT-79138 K2: KAPT Java Stub Gen: Unresolved reference with @kotlin.Metadata in Java in 2.2.0

`v2.2.0`

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 symbol providers
KT-74302 Analysis API: LLFirProvider should disregard self-declarations in getFirClassifierBy*
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-71787 PsiRawFirBuilder.Visitor#visitStringTemplateExpression forces AST loading
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-73669 Support psi-based symbol pointer for implicit primary constructors
KT-76008 Provide PSI-based implementation for KaFirNamedClassSymbol#companionObject
KT-70165 Introduce PSI-based KaSymbols for K2

Fixes

KT-72730 K2: "Unexpected owner function: KtNamedFunction" on vararg val parameter in function
KT-75123 K2. KaFirNamedFunctionSymbol should contain a receiver
KT-75894 Cannot build KaFirJavaFieldSymbol for FirFieldImpl
KT-75115 Analysis API: The JavaModuleResolver compiler class is leaked to Analysis API platform implementations
KT-76018 K2: Stop the wold leads to deadlock/freeze
KT-76011 KaFirNamedClassSymbol#companionObject doesn't provide generated objects generated by compiled plugins
KT-72482 "KotlinIllegalArgumentExceptionWithAttachments: Expected all candidates to have same callableId but some of them but was different" on trying to add the import
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-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-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. Native. Debug

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

Backend. Wasm

New Features

KT-59032 Support instantiation of annotation classes on WASM

Fixes

KT-77622 K/Wasm: investigate CMP crash on mobile Safari
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-74441 K/Wasm: incorrect 1e-45.toString()
KT-59118 WASM: floating point toString inconsistencies
KT-68948 Wasm: float from variable is printed with many decimal points
KT-69107 [wasm] Seemingly incorrect rounding
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-71768 Enable -Xjvm-default=all-compatibility by default to generate JVM default interface methods
KT-54205 Support jakarta Nullability annotations
KT-57919 Store all annotations in Kotlin metadata on JVM under a flag
KT-73255 Change defaulting rule for annotations
KT-74382 Annotating Java record components for @JvmRecord data class
KT-74811 Prohibit usages of @MustUseValue / @IgnorableValue if RV checker is not enabled
KT-74806 Implement feature flag for improved unused return value checker
KT-74809 Support unnamed local variables
KT-73508 Add a warning diagnostic for using kotlin.concurrent.AtomicRef
KT-72941 ANNOTATIONS_ON_BLOCK_LEVEL_EXPRESSION_ON_THE_SAME_LINE missing in K2
KT-74497 Warn about incompatible Kotlin and Java targets in annotations
KT-75061 Support context-sensitive resolution in type position
KT-75315 Support context-sensitive resolution in the call-argument position
KT-75316 Support context-sensitive resolution for expression-position with expected type
KT-76088 Support context-sensitive resolution for annotation arguments
KT-74049 Introduce special override rule to allow overriding T! with T & Any

Performance Improvements

KT-76395 Performance degradation on 28.03.2025
KT-76422 FirJavaFacade#createFirJavaClass: do not compute super type references right away
KT-75957 K2: PsiRawFirBuilder.Visitor#toFirExpression forces AST loading via getSpreadElement
KT-74824 Exponential performance caused by nested flexible types
KT-62855 K2: extra allocation for SAM conversion compared to K1
KT-74977 K/N: support stack array for Array(size) call
KT-74369 Exponential compiler memory usage in specific situations with type inference

Fixes

KT-76606 Enable 'Indy: Allow lambdas with annotations' by default
KT-77301 False positive Context Parameter resolution when using DslMarker
KT-74389 K2: False positive NON_EXPORTABLE_TYPE on non-Unit Promise<...> in K/JS
KT-77219 "@Composable annotation is not applicable" on vararg @Composable () -> Unit in Kotlin 2.2.0
KT-76357 K2: a nested class annotation observes member declarations of the outer class
KT-72734 Support new callable reference nodes in Kotlin Native
KT-74421 K2: Missing "val cannot be reassigned" when trying to assign a value to parent's "val"
KT-63720 Coroutine debugger: do not optimise out local variables
KT-74470 NSME on calling in runtime internal constructor of value class with default arg from tests
KT-77640 Context parameters: using 'contextOf()' function leads to [NO_CONTEXT_ARGUMENT]
KT-73909 Add an inspection discouraging usage of kotlin.concurrent Native atomics in favor of the new atomics
KT-76583 CCE: suspend lambda attempts to unbox value class parameter twice after lambda suspended
KT-76663 KJS: KotlinNothingValueException caused by expression return since 2.1.20
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-76615 K2: "IllegalArgumentException: Inline class types should have the same representation: Lkotlin/UByte; != B" for mixed Java/Kotlin code
KT-77220 Annotation with EXPRESSION is not allowed on lambdas in Kotlin 2.2.0
KT-76381 K2: Expected expression 'FirPropertyAccessExpressionImpl' to be resolved
KT-74739 Native: "IllegalArgumentException: All constructors should've been lowered: FUNCTION_REFERENCE"
KT-74325 Explicit API mode does not enforce explicit return types for extension properties
KT-77259 Confusing message for ANNOTATION_WILL_BE_APPLIED_ALSO_TO_PROPERTY_OR_FIELD
KT-73771 K2: Infinite compilation caused by buildList without type
KT-61258 Kotlin/Native: CLASS CLASS name: modality:FINAL visibility:local superTypes:[.Base]
KT-75317 Kotlin/Native: segfault in kotlin::gc::Markkotlin::gc::mark::ConcurrentMark::MarkTraits
KT-75965 The iOS app did not run successfully in Release mode
KT-77397 Report UNSUPPORTED_CONTEXTUAL_DECLARATION_CALL when calling declaration with contextual function type in signature
KT-77137 K2: Controversial behavior allows resolving annotation arguments on a companion inside it
KT-77150 Native: compilation fails with an assertion error
KT-51960 ClassCastException: Inline function with both context and extension receiver produces this when invoked
KT-73611 Remove -Xextended-compiler-checks in favor of a deprecation cycle
KT-74649 Deprecate language versions 1.8 and 1.9
KT-77283 Binary compatibility of FirDeclarationChecker
KT-73445 K2: do not report "cannot infer visibility" when inheriting multiple implementations
KT-75945 Indy: Allow lambdas with annotations
KT-76898 K2: ClassCastException when data class shadows supertype's componentX method with wrong type
KT-75992 Xcode 16.3: stacktraces on simulators are not symbolicated
KT-76805 Wrong NPE occurs when assigning synthetic properties with platform types in Kotlin 2.1.20
KT-76171 "KotlinIllegalArgumentExceptionWithAttachments: Expected expression 'FirSingleExpressionBlock' to be resolved"
KT-77078 K2: anonymous object is wrongly allowed to implement interfaces by unsafe Delegation
KT-72722 Treat 'copy' calls of a data class as explicit constructor usages
KT-77001 Leave ForbidParenthesizedLhsInAssignments as a warning
KT-75828 Store backing field/delegate annotations and extension receiver annotations in metadata
KT-58369 K2: enable DFA warnings
KT-51258 Annotations should go before context receivers
KT-76253 K2 Compiler: Less precise diagnostic COMPONENT_FUNCTION_AMBIGUITY for flexible type
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-4779 Generate default methods for implementations in interfaces
KT-69624 Debugger: Missing local variable in Variables view (inline function)
KT-75518 NO_CONTEXT_ARGUMENT should report the name of the context parameter in addition to the type
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-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-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 error though code doesn't compile
KT-76572 FIR_NON_SUPPRESSIBLE_ERROR_NAMES does not contain deprecation errors
KT-75704 Refactor FirWhenSubjectExpression
KT-76284 Flexible captured type is not approximated in receiver position
KT-76192 RETURN_TYPE_MISMATCH with same expected and actual type: nullability of actual type is omitted
KT-75944 Allow using invokedynamic for lambdas with no 'Runtime' level retention annotations
KT-76396 FirIntegerConstantOperatorScope: NoSuchElementException: Collection contains no element matching the predicate
KT-76209 CONFLICTING_UPPER_BOUNDS on Nothing bound
KT-59506 Context receivers: Unable to use trailing comma in receiver list
KT-46119 NONE_APPLICABLE instead of NAMED_ARGUMENTS_NOT_ALLOWED with overloaded Java constructor call
KT-75503 Run lazy resolution in CallableCopyTypeCalculator and use withForcedTypeCalculator everywhere in checkers
KT-76485 Don't report EXTENSION_SHADOWED_BY_MEMBER if extension can be called with named arguments
KT-76154 False positive "EXTENSION_SHADOWED_BY_MEMBER" when extension adds default values to parameters
KT-76527 False positive UNSUPPORTED_CONTEXTUAL_DECLARATION_CALL with -Xcontext-receivers and implicit invoke
KT-63246 K2: False positive NOTHING_TO_OVERRIDE in generic property with context receiver in non generic class extending generic class
KT-58534 K2: "Argument type mismatch" with typealias to context receiver functional type
KT-71792 Switch latest stable version in Kotlin project to 2.2
KT-74827 CompilationErrorException : Could not load module in an attempt to find deserializer when trying to evaluate an expression
KT-70352 K2: False-negative CONFLICTING_UPPER_BOUNDS on Nothing bound
KT-71481 K2: drop pre-1.6 language features from compiler code
KT-74454 Support trailing comma in context parameters
KT-74069 False positive UNUSED_EXPRESSION due to Long/Int conversion
KT-74337 Local Delegated properties don't preserve their annotations and don't show up in reflection
KT-55187 Context receivers in function types can have labels
KT-58498 Context receivers: ClassCastException with object and extension function in interface
KT-58165 K2: "IllegalArgumentException: No argument for parameter VALUE_PARAMETER" on overridden contextual property
KT-75234 Add error for callsInPlace contracts on context parameters
KT-73805 K2: Investigate missing diagnostic in implicit invoke call on context function type with receiver from module with disabled context parameters
KT-41934 NI: a type variable for lambda parameter has been inferred to nullable type instead of not null one
KT-75983 Backend Internal error: Exception during IR lowering 'IllegalStateException: Internal error: cannot convert Any to Int'
KT-75535 Compilation of typealias does not check for clashes
KT-72313 K2 IDE / KMP Debugger: Evaluation of inline functions declared in a common source set causes a crash
KT-76290 False positive UNUSED_EXPRESSION while returning Unit in the when branches
KT-32358 NI: Smart cast doesn't work with inline function after elvis operator
KT-76316 K2: Missing NON_PUBLIC_CALL_FROM_PUBLIC_INLINE on object extending private class in public inline function
KT-76324 Frontend diagnostic says "... this will be an error in Kotlin N.M" but N.M is already released
KT-76058 PCLA: compile-time failure on calling a higher-order function from another module inside a lambda assigned to a variable of a type with a postponed type variable
KT-75571 K2: type mismatch error provides unsubstituted types
KT-31391 'Recursive call is not a tail call' with elvis operator in tailrec function
KT-73420 False-positive NON_TAIL_RECURSIVE_CALL on tailrec function with elvis in the return statement
KT-75815 Disable warnings about different context parameter names in overrides
KT-75169 Unnecessary EXTENSION_SHADOWED_BY_MEMBER on generic declarations
KT-75483 Native: redundant unboxing generated with smart cast
KT-76339 K2: Dangling modifier list is missed for enum entries in PSI mode
KT-75513 Avoid overrides traversal without preinitialization
KT-74587 Report an error when JvmDefaultWithoutCompatibility is used with -Xjvm-default=all
KT-76257 Annotations with class references are not supported when marking IR declarations as visible to metadata
KT-71793 Drop language versions 1.6 and 1.7
KT-59272 Incorrect bytecode generated: wrong line number table after condition
KT-69248 K2: IAE “class KtDotQualifiedExpression is not a subtype of class KtCallExpression for factory ENUM_CLASS_CONSTRUCTOR_CALL” with qualified enum constructor call
KT-73778 Kotlin Debugger: NSFE on accessing private property from dependencies during evaluation
KT-74131 Incorrect line numbers for static initializer with delegated local variable
KT-76320 K2: PsiRawFirBuilder: import alias triggers ast loading
KT-63851 K2: No setterValueParameter in metadata for property setter with an annotated parameter
KT-55083 JVM: AbstractMethodError caused by lambda with sealed base interface and fun sub interface and overridden method
KT-16727 Names for anonymous classes in interfaces are malformed on JDK 8
KT-12466 NoClassDefFoundError: B$DefaultImpls on super interface call through K-J-K inheritance
KT-71002 Possible inheritance from nullable type through typealias
KT-75293 K2: Missing [HAS_NEXT_FUNCTION_TYPE_MISMATCH] diagnostics
KT-75498 Forbid .declarations access from checkers
KT-72335 KotlinIllegalArgumentExceptionWithAttachments when using illegal selector
KT-68375 K2: FirPrimaryConstructorSuperTypeChecker fails on generated superclasses
KT-71718 K2: drop TypePreservingVisibilityWrtHack
KT-75112 FE resolves wrong receivers order for property passed to delegate
KT-75924 K2. Incorrect generic type Inference "R? & Any" appears for "Add explicit type arguments"
KT-75969 java.lang.IllegalArgumentException: source must not be null on red code
KT-75322 ConeDiagnosticToFirDiagnosticKt: source must not be null
KT-73800 Wrong method executed on super call in -Xjvm-default=all/all-compatibility with an extraneous super-interface
KT-38029 Wrong method executed on super call in diamond hierarchy with covariant override
KT-75242 Any use-site target can be applied to a lambda and an expression
KT-73051 incorrect direction of subtyping violation in type mismatch error's message for A<X> </: A<Y> given a Tv <: Rv == C constraint from a lambda return position
KT-75090 Argument type mismatch: actual type is 'SuspendFunction0', but 'SuspendFunction0' was expected when anonymous function is passed to function expecting suspend function type
KT-74956 K2: No USAGE_IS_NOT_INLINABLE with compiling an inlined function call
KT-76049 K2: drop explicitTypeArgumentIfMadeFlexibleSynthetically creation when DontMakeExplicitJavaTypeArgumentsFlexible is enabled
KT-76055 K2: drop prepareCustomReturnTypeSubstitutorForFunctionCall logic when DontMakeExplicitJavaTypeArgumentsFlexible is enabled
KT-76057 K2: don't do reverse Java overridability checks when DontMakeExplicitJavaTypeArgumentsFlexible is enabled
KT-75197 K2: Missing [COMPARE_TO_TYPE_MISMATCH] diagnostics
KT-75639 Inline context function leads to ClassCastException
KT-75677 K2: change runtime behavior of KT-75649 case in 2.2
KT-75961 K2: PsiRawFirBuilder.Visitor#visitSimpleNameExpressionforces AST loading via getReferencedNameElement().node.text
KT-67869 Make inference for lambda working consistently inside and outside of the call
KT-74885 K2: IAE "source must not be null" in FirCyclicTypeBoundsChecker
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-73954 Generate implementations in classes for inherited non-abstract methods in -Xjvm-default=all-compatibility
KT-75173 Context parameters: KotlinIllegalArgumentExceptionWithAttachments if you override function with value/extension parameter by fun with context
KT-75742 Native: "IllegalArgumentException: unknown pass name '' " when specifying an empty list of LLVM passes
KT-74819 K2: False-positive overload resolution ambiguity for flatMap inside PCLA
KT-75093 K2 IDE: "Unreachable code" highlighting range is confusing
KT-74572 Context parameters: contracts don't work with context parameters
KT-74765 Move K1 lazy IR implementation from 'ir.tree' to 'psi2ir'
KT-71425 IR Inliner: investigate return type of an inlined block
KT-74764 Native: merge init nodes generated within the same LLVM module for the same klib
KT-75561 K/N: place InteropLowering after UpgradeCallableReferences phase
KT-73369 K/N: move interop lowering up the pipeline
KT-75517 K2: Refactor FirCallableSymbol.resolvedContextParameters to return symbols
KT-75821 K2: REPL resolution doesn't take into account the property type when processing its initializer
KT-75705 IllegalArgumentException when isInitialized is used with java field
KT-75334 Java target shouldn't be specified if Kotlin target isn't specified
KT-75157 Missing PARAMETER_NAME_CHANGED_ON_OVERRIDE and DIFFERENT_NAMES_FOR_THE_SAME_PARAMETER_IN_SUPERTYPES for context parameters
KT-75160 Check usages of value parameters in checkers and adapt to context parameters
KT-75729 KtPsiFactory: no type-safe way to create triple-quoted KtStringTemplateExpression
KT-75040 Unify subject and subjectVariable in FirWhenExpression
KT-75323 FirSyntheticProperty: Unexpected status. Expected is FirResolvedDeclarationStatus, but was FirDeclarationStatusImpl
KT-75602 Introduce concept of shared library session in Fir sessions
KT-75509 PARAMETER_NAME_CHANGED_ON_OVERRIDE is reported randomly
KT-75124 IAE “class org.jetbrains.kotlin.psi.KtContextReceiver is not a subtype of class org.jetbrains.kotlin.psi.KtParameter for factory EXPOSED_PARAMETER_TYPE” on private context receiver
KT-73585 K2: ABSTRACT_SUPER_CALL is not reported
KT-75531 K2 REPL: local name doesn't shadow one from implicit receiver
KT-73359 Migrate frontend sources to new IR parameter API
KT-75380 K2: Modality is configured incorrectly for some FirDefaultPropertyAccessor
KT-75526 Regression in K2 scripting: local name doesn't shadow one from the implicit receiver
KT-59379 K2: Missing MIXING_NAMED_AND_POSITIONED_ARGUMENTS
KT-75106 K2: type parameters of anonymous functions are unresolved
KT-73387 Unexpected implicit type during enhancement
KT-72618 Cannot define operator inc/dec in class context
KT-74546 Serialize context parameters to metadata
KT-68768 K2: unsuccessful inference fork with jspecify annotations
KT-75345 Add a test for KT-42271
KT-75012 K2: Compiler crash on dynamic == null
KT-75195 IllegalStateException: No value for annotation parameter when @all meta-target is used with annotation with constructor
KT-75163 WRONG_ANNOTATION_TARGET_WITH_USE_SITE_TARGET for @all meta-target although there are applicable targets
KT-75198 @all meta-target should be forbidden for delegated properties
KT-74958 K2: UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE isn't reported on accidental trailing closure
KT-74982 Improve UNSUPPORTED message handling
KT-75111 False negative "This declaration needs opt-in" for usage of enum entry with OptIn marker in another module
KT-74924 Infinite recursion in substitution of captured type with recursive supertype
KT-75289 NPE: getParent(...) must not be null
KT-75275 Inline class member inherited from interface is not mangled in '-Xjvm-default=all-compatibility'
KT-74340 FIR: folding binary expression chains for psi parser
KT-73831 Do not choose field target in annotation classes
KT-73494 Enable first-only-warn annotation defaulting mode
KT-75174 K2: incorrect influence of return type nullability on required receiver type in KJK hierarchy with property
KT-74920 Overriding T! with T & Any is not allowed to the extension property receiver type
KT-75150 False ambiguous context parameter reported because context is not chosen via generic parameter
KT-74965 CLI compiler doesn't report syntax errors for JS, Metadata backends if light-tree mode is disabled
KT-74303 K2 IDE / Kotlin Debugger: AE “Trying to inline an anonymous object which is not part of the public ABI” on evaluating private inline function with object inside
KT-75177 NoSuchMethodError on suspend default interface method fake override returning inline class in -Xjvm-default=all-compatibility
KT-74718 K/N: Move TestProcessor phase to the top of the pipeline
KT-75015 Context parameters: it is possible to declare anonymous function with modifiers but they don't have any effect
KT-75092 K2: Missing errors for modifiers on anonymous function in statement position
KT-75009 Context parameters: context is unresolved inside anonymous function if passed as an argument
KT-75017 Context parameters: "IllegalStateException: Cannot find variable a: R|kotlin/String| in local storage " when context from another local function is called
KT-75154 Context receiver deprecation warning should depend on langauge version, not on LATEST_STABLE
KT-74979 Context parameters: anonymous functions with a context aren't parsed in complex cases
KT-74673 K2: ClassCastException when passing suspending functional interface with generic
KT-74469 K2: False positive: "Argument type mismatch" during Java interop
KT-75105 K2: False negative NAME_IN_CONSTRAINT_IS_NOT_A_TYPE_PARAMETER for type constraint of anonymous function
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-64558 K2 compiler does not report UNNECESSARY_SAFE_CALL, UNNECESSARY_NOT_NULL_ASSERTION, USELESS_ELVIS, while K2 IDEA does
KT-74728 K2: Java method overriding Kotlin method with receiver loses vararg modifier
KT-70789 CLI error "mixing legacy and modern plugin arguments is prohibited" on using -Xcompiler-plugin unless default scripting plugin is disabled
KT-72829 Forbid 'entries' name of enum entry, and deprioritize it in resolve
KT-75037 K2: IrGeneratedDeclarationsRegistrar.registerFunctionAsMetadataVisible doesn't handle extension receivers and context parameters
KT-73149 Annotations support for context parameters
KT-74798 Report error on local contextual properties
KT-74092 Context parameters: it is not possible to declare an anonymous function with a context
KT-52152 K2: Investigate suspicious code at SAM conversions
KT-75016 K2: BackendException when context var property is declared in interface
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-73685 K2 IDE / Kotlin Debugger: NSME “Method not found” on evaluating function with constant value in @JvmName
KT-74449 Report RETURN_TYPE_MISMATCH instead of ARGUMENT_TYPE_MISMATCH for return expressions in lambdas
KT-74918 FIR: account for K/Wasm diagnostics in generateNonSuppressibleErrorNamesFile
KT-74897 K2: Report UNSUPPORTED_FEATURE instead of TOPLEVEL_TYPEALIASES_ONLY for nested type aliases
KT-74963 K2: Fir2Ir: Avoid a situation when startOffset > endOffset in generated IrBranch
KT-74697 Overriding a method that's both deprecated and non-deprecated should not cause warnings
KT-74928 K2: "IllegalStateException: Cannot find cached type parameter by FIR symbol" in KJK hierarchy with extension property
KT-74630 K2: local class arguments in annotations on types and type parameters are not serialized
KT-74445 Commonize Native Function/Property reference lowerings
KT-74670 Warning message CONTEXT_CLASS_OR_CONSTRUCTOR isn't reported for context receiver on the constructor
KT-74617 Trivial SMAP optimization leads to missing debug info after inline
KT-74812 compile-time failure on a callable reference with an input type inferred to an inaccessible generic type
KT-66195 K2: Java method is not enhanced from overridden's context receivers
KT-74501 Context parameters: ABSTRACT_MEMBER_NOT_IMPLEMENTED if fun with context is implemented in Java in KJK hierarchy
KT-74385 Missing diagnostic on repeated suspend modifier in function type
KT-74749 Provide explanation IR before script compilation
KT-74751 K2: IllegalStateException: Can't apply receivers of FirPropertyAccessExpressionImpl to IrTypeOperatorCallImpl
KT-74729 NPE when suspend lambda has inline class parameter
KT-74336 Not supported: class org.jetbrains.kotlin.fir.types.ConeIntersectionType
KT-74203 K2: False negative NO_ELSE_IN_WHEN of a generic type with star projection <*> bounded by a sealed hierarchy
KT-48085 Kotlin/Native: LLD removes live code with --gc-sections when producing DLL
KT-69164 Native: use lld from bundled LLVM distribution when compiling on Windows for a MinGW target
KT-74081 Context parameters: implicit call resolves to extension when there is a context
KT-74682 Implement internal type exposure via parameter bounds deprecation postponement
KT-74556 K2: "IAE: class KtDestructuringDeclaration is not a subtype of class KtNamedDeclaration for factory REDECLARATION" with two non-local destructuring declarations
KT-73146 Context parameters CLI & diagnostics
KT-72104 Consider enabling check for unbound symbols in JVM before lowerings
KT-74568 Synthetic nested classes missing JVM attributes
KT-73703 [Native] Move KonanIrLinker to serialization.native module
KT-61175 K2: FirReceiverParameter does not extend FirDeclaration
KT-73961 'lateinit is unnecessary' on transient properties should not be reported for serializable classes
KT-73858 Compose / iOS: NullPointerException on building
KT-62953 JVM IR: Use SimpleNamedCompilerPhase instead of NamedCompilerPhase
KT-72929 Consider caching typealiased constructor symbols created by TypeAliasConstructorsSubstitutingScope
KT-74459 K2: false positive MISSING_DEPENDENCY_CLASS for types inside default argument
KT-73705 [Native] Decouple native caches support from KonanIrLinker and KonanPartialModuleDeserializer
KT-74091 K2: @JvmOverloads-produced overloads have generated line number table
KT-69754 Drop -Xuse-k2 compiler flag
KT-73352 K2: false negative ARRAY_EQUALITY_OPERATOR_CAN_BE_REPLACED_WITH_EQUALS
KT-72962 Consider enabling ConsiderForkPointsWhenCheckingContradictions LF earlier
KT-73027 IllegalStateException: Annotation argument value cannot be null: since
KT-74242 Freeze on runCatching call in finally block inside SAM conversion
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-70507 Should parentheses prevent from plus/set operator desugaring?
KT-67520 Change of behaviour of inline function with safe cast on value type
KT-67518 Value classes leak their carrier type implementation details via inlining
KT-72305 K2: Report error when using synthetic properties in case of mapped collections
KT-71226 K2 Evaluator: Code fragment compilation with unresolved classes does not fail with exception
KT-70233 Implement a deprecation error for FIELD-targeted annotations on annotation properties
KT-67517 Value class upcast to Any leaks carrier type interfaces
KT-72814 FIR: don't use function references in FirThisReference
KT-73153 K2: Standalone diagnostics on type arguments are not reported
KT-73011 K2: Allow overloads resolution for callable references based on expected type variable with constraints
KT-70139 Remove dependencies of debugger on K1 and old JVM backend
KT-69223 Drop parallel lowering mode in JVM backend
KT-7461 Forbid using projection modifiers inside top-level Array in annotation's value parameter
KT-53804 Restore old and incorrect logic of generating InnerClasses attributes for kotlin-stdlib
KT-52774 Resolve unqualified enum constants based on expected type

Compose compiler

New features

`v2.1.21`: 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

Configuration

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Edited Nov 12, 2025 by bullshit