Update kotlin monorepo to v2.0.21

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.jetbrains.kotlin.plugin.compose (source)	2.0.10 -> 2.0.21
org.jetbrains.kotlin:kotlin-serialization (source)	2.0.10 -> 2.0.21
org.jetbrains.kotlin:kotlin-gradle-plugin (source)	2.0.10 -> 2.0.21

---

Release Notes

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

v2.0.21

Apple Ecosystem

• KT-69093 Xcode 16 support in Kotlin

Backend. Native. Debug

• KT-71374 lldb: step out breaks breaking in Xcode 16

Compiler

Fixes

• KT-69735 K2: Static fields are missing from the declaration list of corresponding IrClass for java class
• KT-71122 Regression in Kotlin Compiler 2.0 causing NPE in the runtime
• KT-70931 K2 / Scripts: "cannot convert IrExpression to ConstantValue" when using function annotation
• KT-70584 K2: "IllegalStateException: flow for PostponedLambdaExitNode not initialized - traversing nodes in wrong order?"
• KT-70808 K2: "node has already been visited" with anonymous object in dead code
• KT-69985 K2: Classifier declarations from root package are resolved without imports in non-root packages
• KT-70683 K2: Internal compiler error in IrFakeOverrideSymbolBase.getOwner
• KT-70901 False positive Public-API inline function cannot access non-public-API property accessor
• KT-70930 K2: Java annotations not present on ENUM_ENTRY IR elements
• KT-70194 K2 IDE: exception on a very red file
• KT-69399 Native: IllegalStateException: "Failed to build cache"

Compose compiler

Fixes

• b/329477544 Force open / overridden Composable functions to be non-restartable.
• b/361652128 Disable live literal transform if the corresponding flag is disabled

IR. Actualizer

• KT-70894 IR crash. Unprocessed IrFunctionFakeOverrideSymbol when actualize to Java

IR. Tree

• KT-71191 SymbolTable: Check if the provided signature is public before adding a symbol to the SymbolTable

Native. Build Infrastructure

• KT-71485 K/N runtime parts don't build due to _Float16 issues on x86_64 macOS

Native. C Export

• KT-69507 LLVM 11 clang with Xcode 16 headers: standard c++ headers

Native. C and ObjC Import

• KT-71029 Investigate why stdarg.h declarations leak into testModuleA

Native. Platform Libraries

• KT-70566 LLVM 11 clang with Xcode 16 headers: 'sys/cdefs.h' file not found
• KT-71624 Eliminate remaining UIKit/AppKit removed signatures
• KT-70031 Rebuild platform libraries in 2.0.21 with Xcode 16

Native. Testing

• KT-70603 C++ with -fmodules: cyclic dependency in module 'std': std -> _wctype -> __wctype -> std in dev llvm toolchains

Tools. CLI. Native

• KT-71262 KotlinNativeLink tasks fetching from network despite -Xoverride-konan-properties=dependenciesUrl= being set

Tools. Compiler Plugins

• KT-71038 PowerAssert: Constant on RHS of elvis operator leads to compiler crash

Tools. Daemon

• KT-35381 Get rid of the native-platform usage in kotlin compiler

Tools. Gradle. Multiplatform

• KT-71444 Certain POMs produced by Kotlin 2.0.20 cannot be consumed by KMP projects with Android targets
• KT-70700 Gradle 8.10: The value for task ':commonizeNativeDistribution' property 'kotlinNativeBundleBuildService' cannot be changed any further
• KT-71396 Gradle client side JVM explodes with OOM due to xcodebuild logs

Tools. Gradle. Native

• KT-71419 Light bundle KGP IT run against a stable K/N version

Tools. JPS

• KT-71450 Constant build failure: com.intellij.util.io.ClosedStorageException: storage is already closed

v2.0.20

Analysis. API

New Features

• KT-68143 Analysis API: support KtWhenConditionInRange call resolution

Performance Improvements

• KT-67195 K2: do not call redundant resolve on body resolution phase for classes

Fixes

• KT-67360 Analysis API: KtDestructuringDeclarationSymbol#entries shouldn't be KtLocalVariableSymbol
• KT-67748 K2: AllCandidatesResolver modifies the original FirDelegatedConstructorCall
• KT-68198 Analysis API: Support application service registration in plugin XMLs
• KT-62936 Analysis API: NativeForwardDeclarationsSymbolProvider is not supported for Kotlin/Native
• KT-68689 LL API: support analysis from builtins module
• KT-69630 KAPT User project builds with KAPT4 enabled fail with Metaspace overflow
• KT-65417 K2 IDE: KTOR false positive expect-actual matching error on enum class because of implicit clone() in non-JVM source sets
• KT-68882 Analysis API: Refactor KaSymbols
• KT-65413 K2 IDE: KTOR unresolved serializer() call for @Serializable class in common code
• KT-67996 Analysis API: rename Kt prefix to Ka
• KT-67775 Analysis API: expose only interfaces/abstract classes for the user surface
• KT-68009 K2: lowering transformers of Compose compiler plugin access AbstractFir2IrLazyFunction modality, which results in null point exception
• KT-68918 collectCallCandidates works incorrectly for parenthesis invoke
• KT-68462 Analysis API: Integrate project-structure module into analysis-api and analysis-api-platform-interface
• KT-69131 AA: "provideDelegate" operator is not resolved from the delegation reference in FIR implementation
• KT-69055 Analysis API: Stabilize KaScopes
• KT-66216 K2 IDE. "FirDeclaration was not found for class org.jetbrains.kotlin.psi.KtProperty, fir is null" on incorrect string template
• KT-68959 Introduce KaSeverity
• KT-53669 Analysis API: redesign KtSymbolOrigin to distinguish kotlin/java source/library declarations
• KT-68846 Mark KaFirReference and all implementations with internal modifier
• KT-68845 Move KaSymbolBasedReference to resolution package
• KT-68844 Move KaTypeProjection to types package
• KT-65849 K2: Rename 'high-level-api' family of JARs to 'analysis-api'
• KT-62540 Remove uses of TypeInfo.fromString and TypeInfo.createTypeText from Kotlin plugin
• KT-62889 K2 IDE. FP MISSING_DEPENDENCY_CLASS on not available type alias with available underlying type
• KT-68155 Analysis API: Add PSI validity check to analyze
• KT-62343 Analysis API: fix binary incopatibility problems cause by KtAnalysisSessionProvider.analyze being inline
• KT-68498 To get reference symbol the one should be KtSymbolBasedReference
• KT-68393 Analysis API: Rename KaClassLikeSymbol. classIdIfNonLocal to classId
• KT-62924 Analysis API: rename KtCallableSymbol.callableIdIfNonLocal -> callableId
• KT-66712 K2 IDE. SOE on settings string template for string variable with the same name
• KT-65892 K2: "We should be able to find a symbol" for findNonLocalFunction
• KT-68273 AA: support KtFirKDocReference#isReferenceToImportAlias
• KT-68272 AA: KtFirReference.isReferenceToImportAlias doesn't work for references on constructor
• KT-66996 Analysis API: Expose the abbreviated type of an expanded KtType
• KT-66646 K2: Expected FirResolvedTypeRef with ConeKotlinType but was FirUserTypeRefImpl from FirJsHelpersKt.isExportedObject
• KT-68203 K2: Analysis API: wrong type of receiver value in case of imported object member
• KT-68031 LL resolve crash in case of PCLA inference with local object
• KT-67851 K2: PsiReference#isReferenceTo always returns false for references to Java getters
• KT-68076 AA: use type code fragments for import alias detection
• KT-65915 K2: Analysis API: extract services registration into xml file
• KT-68049 Analysis API: do not expose imported symbols
• KT-68075 K2: Analysis API: Type arguments for delegation constructor to java constructor with type parameters not supported
• KT-65190 AA: reference to the super type is not resolved
• KT-68070 AA: KtExpressionInfoProvider#isUsedAsExpression doesn't work for KtPropertyDelegate
• KT-67743 K2: Stubs & AbbreviatedTypeAttribute
• KT-67706 K2: "KtDotQualifiedExpression is not a subtype of class KtNamedDeclaration" from UnusedChecker
• KT-68021 Analysis API: do not break the diagnostic collection in a case of exception from some collector
• KT-67973 AA FIR: wrong KtCall modeling for == from type bound
• KT-67949 AA: Type arguments of Java methods' calls are not reported as used by KtFirImportOptimizer
• KT-67988 AA: functional type at receiver position should be wrapped in parenthesis
• KT-66536 Analysis API: ContextCollector doesn't provide implicit receivers from FirExpressionResolutionExtension
• KT-67321 AA: Type arguments of Java methods' calls are not resolved
• KT-64158 K2: "KotlinIllegalArgumentExceptionWithAttachments: No fir element was found for KtParameter"
• KT-60344 K2 IDE. "KotlinExceptionWithAttachments: expect createKtCall to succeed for resolvable case with callable symbol" on attempt to assign value to param named getParam
• KT-64599 K2: "expect createKtCall to succeed for resolvable case with callable" for unfinished if statement
• KT-60330 K2 IDE. ".KotlinExceptionWithAttachments: expect createKtCall to succeed for resolvable case with callable symbol" on attempt to assign or compare true with something
• KT-66672 K2 IDE. False positive INVISIBLE_REFERENCE on accessing private subclass as type argument in parent class declaration
• KT-67750 Analysis API: Remove infix modifiers from type equality and subtyping functions
• KT-67655 Analysis API: declare a rule how to deal with parameters in KtLifetimeOwner
• KT-61775 Analysis API: KtKClassAnnotationValue lacks complete type information
• KT-67168 K2: Analysis API: Rendering is broken for JSR-305 enhanced Java types
• KT-66689 Analysis API: KtFirPackageScope shouldn't rely on KotlinDeclarationProvider for binary dependencies in standalone mode
• KT-60483 Analysis API: add isTailrec property to KtFunctionSymbol
• KT-67472 K2: Analysis API FIR: KtFunctionCall misses argument with desugared expressions
• KT-65759 Analysis API: Avoid hard references to LLFirSession in session validity trackers
• KT-60272 K2: Implement active invalidation of KtAnalysisSessions
• KT-66765 K2: Analysis API: support classpath substitution with library dependencies in super type transformer
• KT-67265 K2: status phase should resolve original declarations in the case of classpath subsitution
• KT-67244 K2: StackOverflowError in the case of cyclic type hierarchy and library classpath substitution
• KT-67080 K2: clearer contract for lazyResolveToPhaseWithCallableMembers
• KT-66713 K2 FIR: Expose a way to get the module name used for name mangling
• KT-61892 KtType#asPsiType could provide nullability annotations
• KT-66122 Analysis API: Pass KtTestModule instead of TestModule to tests based on AbstractAnalysisApiBasedTest

Analysis. Light Classes

• KT-65714 K2: IDE K2: "org.jetbrains.kotlin.analysis.api.fir.symbols.pointers.KtFirClassLikeSymbolPointer pointer already disposed"
• KT-65835 SymbolLightClassForClassLike.getName returns null for a companion object instead of Companion
• KT-68261 SLC: Constructors of sealed classes should be private
• KT-68696 Drop DecompiledPsiDeclarationProvider-related stuff
• KT-68404 SLC: wrong binary resolution to declaration with @JvmName
• KT-68275 LC: no arg constructor is not visible in light classes
• KT-66687 Symbol Light Classes: Duplicate field names for classes with companion objects
• KT-66804 Symbol Light Classes: Fields from the parent interface's companion are added to DefaultImpls

Apple Ecosystem

• KT-65542 Cinterop tasks fails if Xcode 15.3 is used

Backend. Native. Debug

• KT-67567 Native: after updating to LLVM 16 lldb hangs when smooth stepping

Backend. Wasm

• KT-70591 To much sources that don't exist inside SourceMap file
• KT-69529 compileProductionExecutableKotlinWasmJs FAILED: No such value argument slot in IrConstructorCallImpl: 1 (total=1)
• KT-68088 Wasm: "UNREACHABLE executed at Precompute.cpp:838" running gradle task wasmJsBrowserDistribution for compose multiplatform on Windows
• KT-65798 K/Wasm: make an error on default export usage
• KT-68828 Wasm test failure. expect-actual. private constructor in expect
• KT-68453 K/Wasm: "Supported JS engine not detected" in Web Worker
• KT-64565 Kotlin/wasm removeEventListener function did not remove the event listener
• KT-65322 [Wasm] Clean-up bootstrap code
• KT-66099 Wasm: local.get of type f64 has to be in the same reference type hierarchy as (ref 686) @​+237036
• KT-63230 [WASM] println(null) prints 'ul'

Compiler

New Features

• KT-58310 Consider non-functional type constraints for type variable which is an expected type for lambda argument
• KT-68969 Consider implementing general "redundant interpolation prefix" warning
• KT-57872 Improve "Public-API inline function cannot access non-public-API" check
• KT-68165 Native: type checks on generic types boundary
• KT-67611 Implement improved handling of $ in literals
• KT-67787 Implement guard conditions for when-with-subject
• KT-39868 Allow access to protected consts and fields from a super companion object
• KT-66169 useContents lacks a contract
• KT-67767 Introduce an ability to enforce explicit return types for public declarations without enabling Explicit API mode
• KT-65841 Allow to actualize expect types in kotlin stdlib to builtins in JVM
• KT-53834 Support for JSpecify @NullUnmarked

Performance Improvements

• KT-69995 K2: Slow compilation when star projecting mutually recursive bounds from java
• KT-69723 K2: code analysis taking too long
• KT-69898 K2: Performance degradation in fir2ir caused by changes around intersection types
• KT-68034 Devirtualization analysis fails to devirtualize string.get

Fixes

• KT-67102 IR Evaluator: NoSuchFieldException when accessing a private delegated property
• KT-35305 "Overload resolution ambiguity" on function for unsigned types (UByte, UShort, UInt, ULong)
• KT-69211 K2: java.lang.IllegalArgumentException: Failed requirement
• KT-68874 Types with different captured types as type arguments are rendered incorrectly
• KT-66086 K/N: Unchecked illegal cast is not thrown
• KT-70186 Kotlin 2.0.20-Beta2: Unexpected number of type arguments: 0
• KT-68889 K2: type variable should not be fixed
• KT-69835 K2 / Native: kotlin.native.binary.gc=cms throws library cached but its dependency isn't error
• KT-70417 DELEGATED_MEMBER_HIDES_SUPERTYPE_OVERRIDE leads to NPE in BE
• KT-69964 K2: Returning from an in-place lambda doesn't compile
• KT-69773 K2: "Overload resolution ambiguity between candidate" with arrays
• KT-60261 K2: No origin is set for composite assignment operators
• KT-15388 Forbid delegated property to have external getter/setter
• KT-70238 K2: false negative VOLATILE_ON_VALUE for constructor properties
• KT-68669 K2: Generate inherited delegated members after actualization
• KT-63828 K2: Missing signature metadata for accessors of properties inherited from delegate
• KT-63871 K2: different value of isNotDefault flag for property inherited from delegate
• KT-67119 Migration warning from context receivers to context parameters
• KT-68997 K2: "No accessor found" for an inline value class when query the value of a delegated class by reflection
• KT-64106 Native: the compiler allows using -opt and -g at the same time
• KT-69766 K2: False negative: Internal setter of generic class is accessible from another module
• KT-68364 JVM: ISE "Bad exception handler end" on a non-local break/continue inside try with finally
• KT-69494 StackOverflowError in CfgTraverserKt.getPreviousCfgNodes
• KT-56880 K2. Conflicting overloads for main() isn't shown when language version is set to 2.0
• KT-69282 K2: equality of unsigned types with nullability works incorrectly
• KT-68492 JVM IR backend: IDE / Kotlin Debugger: AE “Non-reified type parameter under ::class should be rejected by type checker” on evaluating private generic function
• KT-70039 K2: inconsistent stability of vals of captured receivers
• KT-44139 Don't report overload resolution ambiguities if arguments contain an error type
• KT-68996 K2: "Not enough information to infer type argument" caused by typealias annotation with fixed generic argument
• KT-55851 K2: reference to a field from package private class crashes in runtime
• KT-65038 K2: Type alias from indirect dependency causes MISSING_DEPENDENCY_CLASS error
• KT-61875 Native: remove support for bitcode embedding
• KT-67693 Implement checkers for K1 compiler which will check the usage of K2 new features and report that they are not supported in K1 compiler
• KT-68556 K2: false negative PROPERTY_WITH_NO_TYPE_NO_INITIALIZER on uninitialized property without type
• KT-60445 K2/Java: investigate possible symbol clash while enhancing Java class type parameter bounds
• KT-64193 K2: No smartcast with two boolean expressions in a row
• KT-65546 K2. implement extended checker for unused anonymous parameter in lambda
• KT-68358 @EnhancedNullability is missing on value parameter type after inheritance by delegation with strict JSpecify enabled
• KT-67791 False negative "Synchronizing by Meters is forbidden" with inline value classes
• KT-69495 k2: inconsistent output of unsigned number in string templates
• KT-69619 K2. JAVA_TYPE_MISMATCH when Kotlin out generic type used in Java
• KT-69563 trying to call .source on FirPackageFragmentDescriptor results in exception
• KT-69611 Internal annotation FlexibleArrayElementVariance is written to output jar
• KT-69463 K2: false negative SUPER_CALL_WITH_DEFAULT_PARAMETERS with expect/actual declarations
• KT-68724 K2: "ABSTRACT_MEMBER_NOT_IMPLEMENTED" caused by open modifier on interface
• KT-69182 K2: OptIn on enum companion blocks enum constants
• KT-69191 K2: "Unresolved reference" caused by nested data objects
• KT-69569 Wrong paths when one type has multiple annotated arguments
• KT-55128 Wrong type path in type annotations when type arguments are compiled to wildcards
• KT-67692 Native: support LLVM opaque pointers in the compiler
• KT-69402 FirSupertypeResolverVisitor: ConcurrentModificationException
• KT-69062 K1: false-negative "unsupported feature" error on multi-dollar interpolation
• KT-68967 Consider demoting warnings about multi-dollar interpolation to IJ inspections
• KT-68957 False-negative diagnostics about multi-dollar interpolation on string literals without interpolation
• KT-69476 False negative NO_ELSE_IN_WHEN on when over intersection type with expect enum/sealed class
• KT-67069 K2: Delegated member calls interface method instead of fake override
• KT-63864 K2: Missing abbreviated type in metadata
• KT-59833 K2: Stop modifying values of enum entries
• KT-69421 K2: Resolve changed from delegated function to java default function
• KT-69392 K2: "UNSAFE_CALL": when with some variable subjects does not smartcast the variable
• KT-69053 K2: Unsupported intersection overrides for fields
• KT-69227 K2: "Argument type mismatch" caused by generic typealias and upper bound
• KT-31371 NOT_YET_SUPPORTED_IN_INLINE: incorrect error message for local inline function
• KT-49473 PROTECTED_CALL_FROM_PUBLIC_INLINE_ERROR: specialize error message for 'inline' property
• KT-49474 NON_PUBLIC_CALL_FROM_PUBLIC_INLINE: specialize error message for 'inline' property
• KT-49503 SUPER_CALL_FROM_PUBLIC_INLINE_ERROR: specialize error message for 'inline' property
• KT-11302 On inapplicable '@JvmStatic' annotation, highlight only the annotation, not the function signature
• KT-59510 K2: do not render annotations in the deprecation diagnostic
• KT-68532 "This code uses error suppression for 'INAPPLICABLE_JVM_NAME'. While it might compile and work, the compiler behavior is UNSPECIFIED and WON'T BE PRESERVED"
• KT-68859 K2: unable to suppress only "JAVA_MODULE_DOES_NOT_EXPORT_PACKAGE"
• KT-68469 [K2] MISSING_DEPENDENCY_CLASS caused by redundant @file:JvmName
• KT-68999 K2: Unify the style of FIR generator with IR and SIR tree-generators
• KT-66061 Kotlin/Native - building shared module for iOS - Argument list too long
• KT-49420 Suspicious behaviour of frontend in case of DefinitelyNotNull type overload
• KT-59752 K2: "Conflicting overloads" if function with same signature added to different contexts
• KT-68618 K1: Unresolved reference for qualified this in implicit type
• KT-25341 NOT_YET_SUPPORTED_IN_INLINE reported over anonymous object border
• KT-69215 K2: IllegalArgumentException for delegated function in anonymous object with captured type parameters
• KT-69044 Destructuring declaration shouldn't be possible in declaration in when
• KT-69028 K2: FirJvmActualizingBuiltinSymbolProvider returns null on builtins declarations if common source-set is not presented
• KT-15704 Rethink usage of term "type annotation" in error messages
• KT-68970 K2. Argument type mismatch caused by out projection in inferred type from if - else
• KT-68800 K2: Delete ConeAttributes.plus method
• KT-59389 K2: Missing AMBIGUOUS_LABEL
• KT-68803 K2: Smart cast fails with "Unresolved reference" when @Suppress("UNCHECKED_CAST") used in statement
• KT-68968 K2: Missing ILLEGAL_SUSPEND_FUNCTION_CALL diagnostic in initialization code of a local class inside suspend function
• KT-68336 K2 does not seem to pass the right constructor arguments to custom scripts
• KT-68517 "IrSimpleFunctionSymbolImpl is unbound" for actual class containing non-actual functions
• KT-59678 K2: Investigate ConeKotlinType.unCapture()
• KT-69027 K2: Initialize FirStdlibBuiltinSyntheticFunctionInterfaceProvider in library session
• KT-62818 K2: improve VAR_OVERRIDDEN_BY_VAL diagnostic message
• KT-68214 Rename TypeApproximatorConfiguration properties for clarity
• KT-68093 Implement deprecation of smartcasts on class-delegated properties
• KT-67270 Native: report more performance metrics from the compiler
• KT-68621 DATA_CLASS_INVISIBLE_COPY_USAGE false negative for inline fun
• KT-68568 K2: False-positive ACCIDENTAL_OVERRIDE caused by missing dependency class
• KT-66723 K2: NO_ACTUAL_CLASS_MEMBER_FOR_EXPECTED_CLASS for actual typealias that extends to Java class with complicated hierarchy that includes default method
• KT-69000 Can't render constructor of intersection type
• KT-68849 K2: "ClassCastException: cannot be cast to kotlin.jvm.functions.Function2" caused by passing lambda to SAM constructor results
• KT-61744 Native: -Xsave-llvm-ir-after fails to check errors from LLVMPrintModuleToFile
• KT-67103 Support AbbreviatedTypeAttribute for aliased types from the source code
• KT-63921 K2: different representation of recursive type aliases
• KT-68679 K2: "Override has incorrect nullability in its signature compared to the overridden declaration" caused by subclass of Android HashMap
• KT-64335 K2: improve rendering of captured types in diagnostic messages
• KT-68820 K2: "Unresolved reference" on calling function with "contract" name
• KT-67933 K2: no conversion between fun interfaces if target has suspend
• KT-68230 K2: FirMissingDependencyClassChecker: Not supported: ConeFlexibleType
• KT-68531 K2: False-negative error on assignment to enum entry
• KT-68446 K2: compile-time failure on smart-casted generic value used as a when-subject in a contains-check with range
• KT-68678 K2: Drop using FirBuiltinSymbolProvider while compiling JVM stdlib
• KT-68382 Get rid of context receivers in FirScript implementation
• KT-68585 Implement new rules for CFA about enum entries
• KT-68110 K2: "Java type mismatch" caused by spring.Nullable
• KT-68613 K2: False positive CONFLICTING_PROJECTION after fixing KT-67764
• KT-67764 K2: False negative: Projection problem is not reported in is expression
• KT-67887 Expection on assigning to private field of value type
• KT-67801 NSME on evaluating private member function with value class parameter
• KT-67800 NSME on evaluating private top-level function with value class parameter
• KT-68542 K2: Fix referecing to @ExtensionFunctionType if it's declared in source
• KT-68188 K2: Properly support FunctionN creation for stdlib compilation
• KT-67946 K2: Crash on red code: Instead use FirErrorTypeRef for ERROR CLASS: Cannot infer argument for type parameter T
• KT-68526 K2: false-negative inconsistent data class copy visibility warning on call to generic data class copy function
• KT-68528 K2: false-positive inconsistent data class copy visibility warning on call to function from another module with identical value parameter types and return type
• KT-68525 K2: false-negative inconsistent data class copy visibility warning on callable reference to data class copy function
• KT-68617 K2: Secondary constructors in a sealed class have private visibility instead of protected in the generated IR
• KT-63920 K2: Private secondary sealed class constructor is private in metadata, but protected in K1
• KT-57996 Usages of Foo @Nullable [] produce only warnings even with -Xtype-enhancement-improvements-strict-mode -Xjspecify-annotations=strict
• KT-68207 K2: Investigate if losing ConeIntersectionType.upperBoundForApproximation during approximation leads to any issues
• KT-64990 K2: Remove usages of SymbolTable from FIR2IR
• KT-67798 NSME on assigning to private delegated property of value class
• KT-68264 K2: confusing INVISIBLE_* error when typealias is involved
• KT-68529 K2: false-negative redundant annotation warning on @ExposedCopyVisibility on data class with public constructor
• KT-67943 Approximation should not generate types with UPPER_BOUND_VIOLATION errors
• KT-67503 K2: False negative "Type Expected" when attempting to annotate a wildcard type argument
• KT-68187 K2: Create IrBuiltins in fir2ir only after IR actualization
• KT-66443 K2: ArrayIterationHandler doesn't work if UIntArray declared in sources
• KT-68291 K2 / Contracts: Non-existent invocation kind is suggested as a fix
• KT-68209 K2: Strange import suggestion when lambda body contains invalid code
• KT-67368 "NullPointerException: Parameter specified as non-null is null" local lambda creates new not-null checks with 2.0.0-Beta5
• KT-51433 FE 1.0: implement warnings about label resolve changes
• KT-66554 K2. Drop FIR based fake-override generator from fir2ir
• KT-64202 K2: Drop old methods for calculation of overridden symbols for lazy declarations
• KT-67895 K2: Properly implement generation of fake-overrides for fields
• KT-54496 K2: REDUNDANT_MODALITY_MODIFIER diagnostic disregards compiler plugins
• KT-63745 K2: Approximation of DNN with nullability warning attribute leads to attribute incorrectly becoming not-null
• KT-63362 AbstractTypeApproximator fixes only first local type in hierarchy
• KT-67769 K2: "variable must be initialized" on unreachable access in constructor
• KT-51195 FIR IC: Incremental compilation fails with @PublishedApi property
• KT-67966 No JVM type annotation is generated on a class supertype
• KT-46640 Generate JVM type annotations on wildcard bounds
• KT-67952 Annotations on type parameters are not generated for parameters other than the first
• KT-68012 K2. No 'operator' modifier is required on 'component' error in K2
• KT-61835 K2: FirStubTypeTransformer receives unresolved expressions in builder inference session
• KT-63596 K1/K2: Different behavior for lambda with different return type
• KT-67688 K2: False positive CANNOT_INFER_PARAMETER_TYPE for Unit constraint type variable
• KT-62080 False positive UNUSED_VARIABLE for variable that is used in lambda and in further code with several conditions
• KT-60726 K2: Missed TYPE_MISMATCH error: inferred type non-suspend function but suspend function was expected
• KT-41835 [FIR] Green code turns to red in presence of smartcasts and redundant type arguments
• KT-67579 K1/JVM: false-negative annotation-based diagnostics on usages of ABI compiled with non-trivially configured generation of default methods
• KT-67493 K2: argument type mismatch: actual type is 'T', but 'T' was expected
• KT-64900 K2: getConstructorKeyword call in PsiRawFirBuilder.toFirConstructor forces AST load
• KT-67648 K2: wrong exposed visibility errors with WRONG_MODIFIER_CONTAINING_DECLARATION on top-level enum class
• KT-58686 FIR2IR: Don't use global counters
• KT-67592 K2: Success execution of :kotlin-stdlib:compileKotlinMetadata
• KT-60398 K2: consider forbidding FirBasedSymbol rebind
• KT-54918 Refactor transformAnonymousFunctionWithExpectedType
• KT-63360 K2: Malformed type mismatch error with functional type
• KT-67266 K2: disappeared INLINE_CLASS_DEPRECATED
• KT-67569 K2: Fix default value parameters of Enum's constructor if it's declared in source code
• KT-67378 K2: Don't use wrapScopeWithJvmMapped for common source sets
• KT-67738 K2: Introduce kotlin.internal.ActualizeByJvmBuiltinProvider annotation
• KT-64456 K2: Port *VersionRequirementTest to K2
• KT-67136 Put $this parameter to LVT for suspend lambdas
• KT-62538 K2: Declarations inside external classes should be implicitly external
• KT-67627 K2: External interface companion isn't external in IR
• KT-60290 K2: origin is not set for !in operator
• KT-67512 K2: false positive WRONG_GETTER_RETURN_TYPE when getter return type is annotated
• KT-67635 K2: No warning TYPE_MISMATCH_WHEN_FLEXIBILITY_CHANGES for SAM constructor with inferred type
• KT-60501 K2 Scripting: investigate metadata difference between K1 and K2
• KT-67598 K2: Fix incorrect casting UByte to Number in FirToConstantValueTransformer
• KT-56564 False positive "non-exhaustive when" in case of intersection type
• KT-63969 K2: extra property in metadata
• KT-63968 K2: extra property in metadata for anonymous variable in script
• KT-67547 K/N can't build caches, fails with "clang++: error=2, No such file or directory"
• KT-67469 K2: Failing module in FP-intellij
• KT-64033 K2: Investigate ForbidInferringPostponedTypeVariableIntoDeclaredUpperBound
• KT-64457 K2: Fix DecompiledKnmStubConsistencyK2TestGenerated
• KT-66377 IR Evaluator: "no container found for type parameter" when evaluating nested generics
• KT-66378 IR Evaluator: Symbol is unbound
• KT-64506 IDE, IR Evaluator: NPE in ReflectiveAccessLowering.fieldLocationAndReceiver when evaluating private static properties
• KT-67380 K2: Don't check for equals overriding for class Any
• KT-67038 K2: Missing type of FirLiteralExpression causes an exception for property initializer type resolution
• KT-59813 K2: Fix the TODO about firEffect.source in FirReturnsImpliesAnalyzer
• KT-59834 K2: Fix the TODO about merge(other) in UnusedChecker
• KT-59188 K2: Change positioning strategy for WRONG_NUMBER_OF_TYPE_ARGUMENTS error
• KT-59108 K2. SMARTCAST_IMPOSSIBLE instead of UNSAFE_IMPLICIT_INVOKE_CALL
• KT-65503 The inline processor cannot handle objects inside the lambda correctly when calling an inline function from another module
• KT-30696 NoSuchMethodError if nested anonymous objects are used with propagation reified type parameter
• KT-58966 Incorrect type inference for parameters with omitted type of anonymous function that is being analyzed as value of function type with receiver
• KT-67458 Use @PhaseDescription for JVM backend lowering phases
• KT-65647 K2 ignores diagnostics on sourceless FirTypeRefs
• KT-64489 K2: Rename FirAugmentedArraySet
• KT-67394 FIR: Make FIR repr of For from PSI and LightTree the same
• KT-66724 K2 IDE. False positive errors because of wrong type inference in complex case of delegated property and type arguments
• KT-40248 Confusing error message NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY
• KT-66947 K2: false-positive JSpecify nullability enhancement warning on Java wildcard type argument with same base type but different nullabilities as upper and lower bounds
• KT-66974 K2: false-negative JSpecify nullability enhancement warning on nullable projection of Java wildcard type argument with non-null bounds in out-position
• KT-66946 K2: false-negative JSpecify nullability enhancement warning on Java wildcard type argument with nullable upper bound in out-position
• KT-66442 K2: No visibility error on importing private aliases
• KT-66598 K2: Allow comparisons, is-checks and casts between Kotlin and platform types
• KT-55966 K2: Not enough information to infer type variable K if smartcast is used
• KT-64894 OPT_IN_ARGUMENT_IS_NOT_MARKER diagnostic message is unclear
• KT-67019 K2: IR has incorrect EQ origins for some inplace updating operators
• KT-59810 K2: Support other ConstraintPosition-s
• KT-55383 K1/K2: isClassTypeConstructor behaves differently for stub types
• KT-60089 K2: Introduced ERROR_IN_CONTRACT_DESCRIPTION
• KT-60382 K2: Refactor ExpectActualCollector
• KT-62929 K2: investigate if guessArrayTypeIfNeeded is necessary in annotation loader
• KT-65642 K2: IR: Array access desugaring doesn't have origins
• KT-24807 No smartcast to Boolean in subject of when-expression when subject type is non-nullable
• KT-66057 K2: incorrect supertype leads to class declaration being highlighted red
• KT-63958 K2: drop support of UseBuilderInferenceOnlyIfNeeded=false
• KT-63959 K2: treat stub types as non-nullable for isReceiverNullable check
• KT-65100 IrFakeOverrideBuilder: support custom 'remove(Int)' handling logic in MutableCollection subclasses

Compose compiler

New features

• cdfe659 Changed how compiler features being rolled out are enabled and disabled in compiler plugin CLI. Features, such as strong skipping and non-skipping group optimizations are now enabled through the "featureFlag" option instead of their own option.
• 192e556 Strong skipping is now enabled by default
• 842a9e8 Add support for default parameters in abstract and open @​Composable functions b/165812010

Fixes

• e207b05 Fixes group generation for if statements when nonSkippingGroupOptimization is enabled b/346821372
• f64fc3a Fixes endToMarker generation in early return from inline lambdas that caused start/end imbalance b/346808602
• d6ac8a5 Stop memoizing lambdas with captured property delegates b/342557697
• f38d5a3 Stop capturing parameter meta across crossinline boundary b/343801379
• 770fe8d Propagate annotations from inferred function types when serializing b/345261077
• 3c67cda Fix memoization of captureless lambdas when K2 compiler is used b/340582180
• 3281e53 Allow memoizing lambdas in composable inline functions b/340606661
• b/351858979 Fix stability inferencing of interfaces on incremental compilation
• b/346821372 [Compose] Fix code generation for group optimization
• b/357878245 Disallow open @​Composable functions with default params to fix binary compatibility issues.

IR. Actualizer

• KT-68830 Compiler crash on missing actual class
• KT-69024 K2: Children of expect annotation with @OptionalExpectation should be actualized
• KT-68742 Allow expect protected to Java protected actualization
• KT-66436 K2. Actualizing modCount property with a field in AbstractMutableList
• KT-68741 Support actualization of AbstractMutableList.modCount
• KT-68801 Crash on access of fake override of function actualized by fake override
• [KT-66307](https://youtrack.jetbrains.com/is

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