JetBrains/kotlin v2.2.20

Kotlin 2.2.20

on GitHub

Changelog

Analysis API

• KT-78187 Synthetic properties not to be shown as callables
• KT-72525 K2. red code and KIWA on new-lines in guarded when conditions (with parentheses)
• KT-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