1.9.0

Analysis API

New Features

• KT-57930 Analysis API: provide an API for extending Kotlin resolution
• KT-57636 K2: Add the return type of K2 reference shortener AA ShortenCommand::invokeShortening() e.g., ShorteningResultInfo to allow callers to access the shortening result PSI

Fixes

• KT-58249 Analysis API: Disable error logging for FE10 implementation of resolveCall when resolve is not successful
• KT-55626 Impossible to restore symbol by psi from script file
• KT-57314 LL FIR: Combine LLFirProvider$SymbolProviders in session dependencies (optimization)
• KT-55527 K2 IDE: Rewrite KtScopeContext class to allow to handle each scope separately
• KT-55329 LL FIR: Unexpected ACTUAL_WITHOUT_EXPECT error on constructor and function declaration
• KT-50732 LL API: fix compiler based tests
• KT-57850 K2: contract violation due to SymbolLightAccessorMethod.propertyAccessorSymbol
• KT-56543 LL FIR: rework lazy transformers so transformers modify only declarations they suppose to
• KT-56721 K2: FirExtensionDeclarationsSymbolProvider: java.lang.IllegalStateException: Recursive update
• KT-50253 Analysis API: Solve issues with ProcessCancelledException
• KT-56800 K2 IDE: optimize deprecation calculation for symbols
• KT-55006 Analysis API does not transform Java type refs for callable symbol return types
• KT-57256 AA FIR: Reduce lazy resolve phase for deprecation status
• KT-57619 K2: CFG for class initializer is not correctly built in reversed resolve mode
• KT-58141 K2: AA FIR: impossible to restore symbol for declaration with annotation with argument inside type
• KT-57462 Symbol Light Classes: SymbolLightFieldForProperty should retrieve annotations not from KtPropertySymbol, but from the corresponding backing field
• KT-54864 Analysis API: add function to get expect KtSymbol list by actual KtSymbol
• KT-56763 Analysis API: .KtSourceModuleImpl is missing in the map. on symbol restore when symbol cannot be seen from the use-site module
• KT-56617 Analysis API: optimize KtFirSymbolProviderByJavaPsi.getNamedClassSymbol
• KT-54430 K2: .getAllOverriddenSymbols() returns invalid results

Backend. Native. Debug

• KT-55440 Kotlin/Native debugger: inline function parameters are not visible during debugging

Backend. Wasm

• KT-58293 Wasm: ReferenceError: e is not defined in kotlin.test.jsThrow
• KT-58931 Wasm tests are failing to start on Kotlin 1.9.0-Beta
• KT-58188 Restore binary compatibility of PlatformDiagnosticSuppressor.shouldReportUnusedParameter
• KT-57136 K/Wasm: Restrict non-external types in JS interop
• KT-57060 Clarify the lack of support for dynamic in Kotlin/Wasm
• KT-56955 K/Wasm: Support restricted version of K/JS js(code)
• KT-57276 Wasm: “Body not found for function” error when compiling konform library with Kotlin/Wasm support
• KT-56976 K/Wasm bug with calling override of external function with default parameters

Compiler

New Features

• KT-55333 Allow secondary constructors in value classes with bodies
• KT-54944 @Volatile support in native
• KT-54746 Deprecate with ERROR JvmDefault annotation and old -Xjvm-default modes
• KT-47902 Do not propagate method deprecation through overrides
• KT-29378 K2: rework warnings/errors for equality/identity operators on incompatible types
• KT-57477 False-positive overload resolution ambiguity in case of lambda without arguments
• KT-57010 Kotlin/Native: make it possible to compile bitcode in a separate compiler invocation
• KT-55691 K2: Avoid inferring Nothing? in presence of other constraints (beside type parameter bounds)
• KT-46288 Unexpected behavior of extension function on lambda with suspend receiver
• KT-24779 Inconsistent smart cast behavior for bound data flow values

Performance Improvements

• KT-23397 Optimize out field for property delegate when it's safe (JVM)
• KT-56906 FIR: Use cached instance of FirImplicitTypeRefImpl in FIR builders
• KT-56276 LanguageVersion.getVersionString() allocates 5k objects on project opening

Fixes

• KT-57784 “NullPointerException: Parameter specified as non-null is null:” with enum, companion object, ‘entries’ and map
• KT-55217 K2: support callable reference conversions on top-level expressions
• KT-57232 K2: build Space JVM (master)
• KT-59079 “AE: SyntheticAccessorLowering should not attempt to modify other files!” with callable reference to constructor with value class parameter
• KT-58837 Partial linkage fails to report any compiler message on Windows when launched through Gradle plugin
• KT-57602 K2: Rework member scope of types having projection arguments for covariant parameters
• KT-55171 Put new contracts syntax under a feature flag
• KT-58719 K2: false-positive INVISIBLE_REFERENCE error in case of importing an internal abstract class
• KT-56030 [K2/N] Support Objective-C overloading by param names only
• KT-57510 K2: Data class equals/hashCode/toString methods are not written to Klib metadata
• KT-56331 K2: compiler backend crash on usage of expected function with default arguments
• KT-53846 K2 / Context receivers: ClassCastException on secondary constructor of class with context receiver
• KT-58621 K2: Private class shadows public function defined in the same package
• KT-59102 K2: constant evaluator does not provide Long type on shl
• KT-59066 [K2] delegation leads to “IllegalStateException: Expected some types”
• KT-56074 K2: build Space JVM (snapshot 2022.3)
• KT-58787 KAPT: “NullPointerException: null cannot be cast to non-null type” with delegate
• KT-57022 K2 IllegalStateException in signature computation
• KT-56792 K2: build kotlinpoet
• KT-57373 K2: FIR properties synthesized when implementing interface by delegation don't have accessors
• KT-56583 K1: Implement opt-in for integer cinterop conversions
• KT-59030 [PL] Workaround for broken @Deprecated annotations in c-interop KLIBs
• KT-58618 K2: Local property delegates cannot infer generic return type
• KT-36770 Prohibit unsafe calls with expected @NotNull T and given Kotlin generic parameter with nullable bound
• KT-56739 K2: build Space iOS
• KT-57131 K2: stdlib test compilation fails on ListTest.kt in FirJvmMangleComputer
• 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-58897 K2: False positive unresolved reference with same-named enum class and its entry
• KT-40903 Forbid actual member in expect class
• KT-30905 Expect var property with default public setter matches with actual var property with private setter
• KT-56172 K2: Fix reporting of PRIVATE_CLASS_MEMBER_FROM_INLINE error
• KT-56171 Implement deprecation warning for missing PRIVATE_CLASS_MEMBER_FROM_INLINE error
• KT-27261 Contracts for infix functions don't work (for receivers and parameters)
• KT-56927 Enum with secondary constructor can't be compiled with K2 using JS/Native backend
• KT-53568 Partial linkage: absent class as type parameter bound causes failure of compileProductionExecutableKotlinJs
• KT-53608 Partial linkage: Kotlin/JS fails with IllegalStateException: “Validation failed in file” when overridden declaration was visible, but now private
• KT-53663 Partial linkage: usage of property which becomes abstract: no IrLinkageError, but AssertionError in Native backend instead
• KT-56013 K2. a set of errors about local properties are missing
• KT-53939 Partial linkage: with turning object into class linkNative and jsTest tasks fail
• KT-53938 Partial linkage: with turning interface into class and using as second parent Native build fails
• KT-53941 Partial linkage: with turning class into object accessing member via parameterless constructor does not fail
• KT-53970 Partial linkage: on turning nested class into inner JS tasks are successful, Native build fails
• KT-53971 Partial linkage: turning inner class into nested: without usage in executable Native is successful, JavaScript fails
• KT-53972 Partial linkage: turning inner class into nested: with usage in executable Native fails with NPE in backend
• KT-54045 Partial linkage: turning class into type alias + calculating implicit function type: build fails with UninitializedPropertyAccessException: “lateinit property parent has not been initialized”
• KT-54046 Partial linkage: turning type alias into class + using it as type: build fails with AssertionError: “Expected exactly one delegating constructor call but none encountered”
• KT-53887 Partial linkage: turning from enum to regular class + reference to enum contant causes compileProductionExecutableKotlinJs fail with IllegalStateException
• KT-54047 Partial linkage: reference to removed enum const causes JS fail with “IllegalStateException: Validation failed in file”
• KT-54048 Partial linkage: reference to removed enum const in runtime causes Native fail with IllegalStateException at IrBindablePublicSymbolBase.getOwner()
• KT-53995 Partial linkage: on turning class to abstract and direct constructor call Naive fails, JavaScript is successful
• KT-43527 @ExtensionFunctionType is allowed on function types with no parameters and leads to backend exception
• KT-55316 K2. IllegalStateException on incorrect import directive name
• KT-57570 Remove source code excerpts from platform type nullability assertion exceptions
• KT-56073 K2: build Exposed
• KT-47932 Report errors on cycles in annotation parameter types
• KT-38871 Kotlin Gradle DSL, MPP: UNUSED_VARIABLE when configuring a sourceset with delegated property
• KT-46344 No error for a super class constructor call on a function interface in supertypes list
• KT-56609 K2: False positive NULL_FOR_NONNULL_TYPE with -Xjsr305=strict and @Nullable annotation Java parameter
• KT-56656 K1/K2: inconsistent NOTHING_TO_OVERRIDE with complex nullable annotations
• KT-58332 K2: local fun with suspend type is not marked as suspend in IR
• KT-57991 K2: Modifier ‘suspend’ is not applicable to ‘anonymous function’
• KT-54294 K2: “Not all type variables found” in builder inference with type parameters inferred through a union of two branches
• KT-58564 [PL] Annotations with unlinked parameters are not removed
• KT-52597 Provide Alpha Support for Multiplatform in the K2 platform
• KT-58523 K2: reference is resolved to imported type-alias instead of identically named top-level property
• KT-57098 Native: avoid object initialization while accessing const val
• KT-57973 32-th default value in inline classes override function is not used
• KT-57714 “IllegalStateException: <B::!>” using reified generics
• KT-57810 toString of object erroneously considered as constant function in string concatenation
• KT-58076 K2: Incorrect inference of type of labeled receiver
• KT-57929 K2: Arguments of annotations are not calculated in a lot of strange locations
• KT-54874 K2. No compilation error with incorrect Comparator invocation
• KT-55388 Consider enabling ProhibitUsingNullableTypeParameterAgainstNotNullAnnotated
• KT-53041 NPE in Kotlin 1.7.0 when using RxJava Maybe.doOnEvent with anonymous parameters
• KT-54829 Cleanup local types approximation logic
• KT-58577 K2: private Kotlin property prevents use of Java set-method from Java-Kotlin-Java hierarchy in another module
• KT-58587 MUST_BE_INITIALIZED must take into account effectivelly final
• KT-58524 K2: false-positive overload resolution ambiguity error on invoking a generic class's member function with id-shaped function-typed parameter on intersection-typed receiver
• KT-53929 Enum.entries: consider changing scope behavior in K1
• KT-58520 K2: FIR2IR: ISE during const evaluation of operator times with exposed
• KT-57905 K1: resolution to base class‘s Java field instead of derived class’s Kotlin property is not deprecated in case of different types
• KT-56662 K1: false negative INVISIBLE_SETTER for a var with internal setter accessed from a derived class
• KT-57770 K2: Support generation of serializer if base class for serializable class declared in different module
• KT-58375 Kapt: “wrong number of type arguments. required 1” when more than 22 type arguments
• KT-48870 [FIR] Different behavior for explicit receiver resolution inside delegated constructors
• KT-58013 K2: “Not enough information to infer type variable T” when using assert non-null (!!) and delegation
• KT-58365 K2: Fix stub types leakage in builder inference caused by implicit receiver type update with partially resolved calls (IGNORE_LEAKED_INTERNAL_TYPES for stub types)
• KT-58214 Continuation parameter only exists in lowered suspend functions, but function origin is LOCAL_FUNCTION_FOR_LAMBDA
• KT-58030 K2/MPP/JVM: compiler backend crash on super-call to indirectly inherited Java method
• KT-58135 K2: Priority of extension property is lower than ordinary property
• KT-57181 [K1/N, K2/N] Expect and Actual funs have different IdSignature.CommonSignature, if Expect has default argument
• KT-58219 K2/MPP/metadata: false-positive invisible reference error in Native-shared source set
• KT-58145 K2/MPP/metadata: compiler FIR crash on inheritance of a generic class with property by actual-class from Native-shared source set
• KT-56023 Constant operations (e.g. division) are not constant in K2 (JS, Native)
• KT-57354 In suspend function default arguments are sometimes not deleted in IR
• KT-55242 K2/MPP: basic build/link functionality
• KT-57979 K2: Unresolved reference error when assigning to Java synthetic property with a different nullability getter
• KT-57543 K2 reports DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE
• KT-58142 K2: val parameter with more specific type is lower priority
• KT-48546 Missed TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM error at plus-assign
• KT-57854 RECEIVER_TYPE_MISMATCH on synthetic property from mutually recursive Java generics with disabled ProperTypeInferenceConstraintsProcessing
• KT-54518 False negative NON_PUBLIC_CALL_FROM_PUBLIC_INLINE when calling internal method of super class
• KT-58025 K2: Argument type mismatch when using Springs HandlerMethodArgumentResolver
• KT-58259 Unexpected unresolved function call with obvious invoke-convention desugaring
• KT-57135 K2: Fir should take into account an annotation's allowed targets as well as the use-site target when deciding whether it applies to a property, a field, or a constructor parameter
• KT-57069 K2: Method kind in metadata is DECLARATION when DELEGATION is used in K1
• KT-57958 K2: Initializer type mismatch when using extension property on type with star projection
• KT-58149 K2: New inference error with buildList
• KT-58008 K2: “Cannot find cached type parameter by FIR symbol: T” on suspend function with generic and nested class
• KT-57835 K2: compiler crash on lambda with dynamic receiver
• KT-57601 K2: Builtin function extensionToString can't be accessed
• KT-57655 K2: ImplicitIntegerCoercion is not working for named arguments
• KT-58143 K2: overload resolution ambiguity inside dynamic lambda
• KT-58132 K2: Implicit int constant to long converion crashes FirSerializer
• KT-57378 Partial linkage: Run codegen box tests for Native & JS with enabled PL
• KT-58207 K2: Handle result of completion of synthetic call with callable reference argument
• KT-56549 K2: Reference to Java sealed class fails to compile
• KT-57994 K2: Type inference failed on function reference
• KT-58099 interop0 test fails with error “type kotlin.String? is not supported here: doesn't correspond to any C type”
• KT-57671 Synthetic $EntriesMappings declaration is public and generated even for enums from current module on IC
• KT-56517 K2: Reference to Java record fails to compile: “unresolved reference”, “Overload resolution ambiguity between candidates”
• KT-58163 FIR: deserialized default property setter and getter must have FirResolvePhase.ANALYZED_DEPENDENCIES phase
• KT-55646 K2: Report definitely non-nullable as reified error
• KT-58043 k2: Expect call is not removed from IR with nullability-based overload
• KT-56442 K2: Make sure K2 has the same behavior for defaults with overrides as K1 has
• KT-55904 Fix tests for volatile annotation on K2
• KT-57928 K2: Arguments of annotations on constructor value parameter are not calculated
• KT-57814 K2: Argument type mismatch with delegating property
• KT-56490 Implement deprecation for an anonymous type exposed from inline functions with type argument
• KT-57781 K2: Generated serializer is invisible in a non-JVM test source set
• KT-57807 K2: Symbol already bound exception for arrayOf function from IrBuiltInsOverFir
• KT-57962 K2: No set method providing array access on dynamic
• KT-57353 K2: unresolved reference when using fully qualified object declaration name as an expression, when a declaration package is from another klib and has at least two name segments
• KT-57899 K2: compiler FIR2IR crash on anonymous object with inheritance by delegation to value of smart-casted type parameter
• KT-57988 K2: compiler exception on get operator on dynamic this
• KT-57960 K2: incorrect type inference in lambda with dynamic receiver
• KT-57923 K2: Optional expectation annotation crashes const evaluator
• KT-56511 K1: false negative SMARTCAST_IMPOSSIBLE when alien constructor property is accessed from a private class
• KT-58033 K2 reports Constructor must be private or protected in sealed class in actual sealed class if its constructor has own actual declaration
• KT-58061 K2: false-positive unsupported feature error on callable references to Java methods from annotation interfaces
• KT-55079 Refactor DiagnosticReporterByTrackingStrategy and fix some “diagnostic into black hole” problems
• KT-57889 K2: false-positive lack of information for inline function‘s type parameter in case of builder-style inference from caller function’s return expression
• KT-57961 K2: Unresolved reference using dynamic lambda parameter
• KT-57911 K2: Contracts are not inherited by substitution overrides
• KT-57880 K2: false-positive argument type mismatch due to lambda receiver shadowing labeled outer lambda receiver when assigning lambda to variable
• KT-57986 K2: NPE on building Space
• KT-57873 K2: compiler FIR serialization crash on builder-style inference from lambda's return type
• KT-57941 K2: Assertion error on loading serializable class with non-serializable property compiled with K1 compiler
• KT-57947 K2: Incorrect resolution results when property type for invokeExtension is not inferred
• KT-58002 K2: compiler FIR serialization crash on platform type with type-targeted Java annotation with Java enum as argument
• KT-57263 K2/MPP/JVM: compiler codegen crash on expect-property as default argument for expect-function's parameter
• KT-56942 K2: False-negative NO_ELSE_IN_WHEN if subject is flexible type
• KT-56687 Unexpected behaviour with enum entries when using outdated stdlib
• KT-56398 K2/MPP: compiler backend crash on inheritance from expected interface
• KT-57806 K2: string interpolation as annotation parameter causes error
• KT-57611 K2: Annotation arguments are not evaluated
• KT-56190 [K2/N] Const initializers are not serialized to klib
• KT-57843 K2: Missing diagnostic when calling constructor through typealias whose expansion has a deprecation
• KT-57350 FIR: deprecation diagnostic is not reported on a super class call
• KT-57532 K2: IrActualizer doesn't handle properties overloaded by extension receiver correctly
• KT-57776 K2: Suppressing “INVISIBLE_REFERENCE” leads to AssertionError: Unexpected IR element found during code generation
• KT-57769 [K2] Load properties in proper order for classes compiled with kotlinx.serialization and LV < 2.0
• KT-57879 K2: compiler FIR serialization crash on passing Java constants as arguments to type-targeted annotations
• KT-57893 K1/K2 inconsistency on smart casts of internally visible properties in friend modules
• KT-57876 K2: stack overflow in compiler FIR deserialization on nested type-target annotation class used in enclosing class
• KT-57839 K2: Compiler crash on lambda returning anonymous object with implemented lambda
• KT-57822 K2: Can't refer to external interface from class literal
• KT-57809 K2: No value passed for parameter of external class
• KT-56383 Build intellij master with LV 1.9
• KT-57735 K2: MPP: K2 reports hides member of supertype and needs ‘override’ modifier for the function with @PlatformDependent annotation when there is an empty linux target in project
• KT-55056 Builder inference causes incorrect type inference result in related call
• KT-57689 K2: Unresolved reference to nested typealias in KLIB
• KT-57665 K2: incorrect resolution of dynamic type
• KT-57381 K2/MPP/Native: impossible to override Any::equals with non-external function
• KT-57654 K2: Lambda with receiver deserialized as lambda without receiver during metadata compilation
• KT-57662 K2: The error message is poorly formatted and not precise in case of NO_ACTUAL_CLASS_MEMBER_FOR_EXPECTED_CLASS error and @Suppress is used
• KT-57763 FirExtensionRegistrar extension point broken
• KT-57312 K2: IR interpreter fails on string interpolation with const val from a klib involved
• KT-57768 Don't decompile code to search for annotation arguments
• KT-55628 Diagnostics for kotlin.concurrent.Volatile annotation applicability
• KT-55860 K2. [CONFLICTING_INHERITED_MEMBERS] for inheritor of a class with overloaded generic function
• KT-53491 K2: Implement “Operator ‘==’ cannot be applied to ‘Long’ and ‘Int’” error
• KT-55804 K2: UNSAFE_CALL Non-nullable generic marked as nullable even if non-null asserted
• KT-57682 K2: Incorrect composing of signatures for calls on dynamic types
• KT-55405 K2: false-negative INVISIBLE_REFERENCE in import directives
• KT-54781 K2: no error on unresolved import statement with more than one package
• KT-57635 K2/MPP: Expect constructors are not considered as expect during metadata deserialization
• KT-57376 K2/MPP: false-positive K/JS diagnostic in absence of K/JS target when sharing a source set between K/JVM and K/Native
• KT-55902 K2: Support ImplicitIntegerCoercion annotation
• KT-56577 Migrate Native KLIB ABI compatibility tests to K2
• KT-56603 [K2/N] Segfault invoking fun from binary compatible klib
• KT-57457 K2: the error message is not quite informative in case of EXPOSED_PROPERTY_TYPE_IN_CONSTRUCTOR_ERROR
• KT-57568 K2: K2, Native reports overload resolution ambiguity
• KT-57446 K2: Adapter function reference is not generated inside when expression
• KT-54894 K2: False positive RETURN_TYPE_MISMATCH on function which returns a functional type with @UnsafeVariance argument
• KT-57001 K2 compilation fails due to nullabillity subtyping not working properly
• KT-57271 Delay forbidding inference to an empty intersection to version 2.0
• KT-57209 K2: type parameters are available in companion object scope
• KT-50550 False positive NO_ELSE_IN_WHEN with annotated when branch condition
• KT-57431 K2 MPP JS: Compiler crash on transitive common dependencies
• KT-57456 K2 reports uninitializied variable in enum class when variable is used in lambda and defined in companion object
• KT-57583 K2/MPP/JS&Native: FIR2IR compiler crash on reference to Any method inherited by expect-classifier
• KT-56336 [K2/N] Multiplatform test fails with unexpected “actual declaration has no corresponding expected declaration” compiler error
• KT-57556 K2: Rename error ‘This API is not available after FIR’
• KT-23447 Integer.toChar compiles to missing method
• KT-46465 Deprecate and make open Number.toChar()
• KT-49017 Forbid usages of super or super if in fact it accesses an abstract member
• KT-56119 BinaryVersion.isCompatible binary compatibility is broken
• KT-57369 K2/MPP: supertypes established in actual-classifiers from other source sets are not visible
• KT-55469 [K2/N] equals(Double,Double) and equals(Boolean,Boolean) are not found
• KT-57250 K2: the metadata is serialized for an expect class even if the actual class is present when compiling to klib
• KT-56660 K2/MPP: compiler backend crash on invoking a K/Common constructor in K/JS code
• KT-55055 K1: Builder inference violates upper bound
• KT-57316 Initialize Enum.entries eagerly: avoid using invokedynamics
• KT-57491 Kotlin synthetic parameter looks ordinary
• KT-56846 K2: incorrect line & symbol numbers in exception reporting
• KT-56368 K2/MPP: compiler backend crash on missing actual declaration
• KT-57104 K2: false-positive conflicting inherited JVM declarations error despite use of @JvmName in another module
• KT-56747 [K2/N] Return type for lambda: (Any) -> Any which returns Unit is different for K1 and K2 and return statement is missing with K2
• KT-57211 K2: incorrect “error: an annotation argument must be a compile-time constant” on unsigned array in annotation argument
• KT-57302 K2 fails with IllegalStateException on reading inherited property of Java enum
• KT-57424 K2 IDE: “By now the annotations argument mapping should have been resolved” exception
• KT-57241 K2 MPP: Actualization doesn't work for actual enum that has primary constructor with arguments
• KT-57210 K2 MPP: Support of arguments with dynamic type
• KT-57182 K2 MPP: Actualization doesn't work for nested objects
• KT-56344 K2: Implement correct errors reporting of IrActualizer
• KT-54405 K2 compiler allows val redeclaration
• KT-54531 [K2] Uncaught Runtime exception is thrown instead of user friendly error messages with details in case -no-jdk option set to true
• KT-56926 K2: incorrect line number generated for class constructor or method with default parameter when comment before
• KT-56913 K2: Incorrect line numbers in overriden field getters and setters
• KT-56982 K2: Incorrect line number start in when expression
• KT-56720 K2: false positive MANY_IMPL_MEMBER_NOT_IMPLEMENTED in case of delegation in diamond inheritance
• KT-57175 K2: false-positive INVALID_TYPE_OF_ANNOTATION_MEMBER on type aliases
• KT-25694 Fix reporting of uninitialized parameter in default values of parameters
• KT-57198 K2: false-positive type mismatch error on inherited raw-typed class with type parameters in upper bounds of other type parameters
• KT-15470 Inconsistency: use-site ‘set’ target is a compilation error, use-site ‘get’ target is ok
• KT-57179 FIR: preserve prefix increment behavior like in K1 by calling getter twice
• KT-57405 K2. Function call ambiguity error when nullable String is passed to function with Spring @Nullable annotation in signature
• KT-57284 K2: compiler codegen crash at property initialization in constructor after smartcast of dispatch receiver to indirectly derived type
• KT-57221 K2: compiler FIR2IR crash on function's unavailable cached type parameter
• KT-57036 Unresolved reference: with inferred type of class constructor with extension parameter
• KT-56177 K2: FIR should not generate annotation on both property and parameter
• KT-54990 NI: Type mismatch when encountering bounded type parameter and projections
• KT-57065 K2: overload resolution ambiguity between type-aliased constructor and identically named function
• KT-49653 Deprecate and remove Enum.declaringClass synthetic property
• KT-57190 K2: false-positive unsafe call error on safe call on type-aliased nullable receiver in SAM-conversion
• KT-57166 K2: false-positive val reassignment error when synthetic property with implicitly typed overridden getter is called from implicitly typed member that is declared earlier
• KT-55828 [K2/N]: Fix test fails in OPT mode : Internal compiler error: no implementation found ... when building itable/vtable
• KT-56169 False negative deprecation warning about future inference error with builder inference
• KT-56657 K1/K2: inconsistent behavior in nullability mismatch (Guava hash set/map)
• KT-57105 K2: compiler codegen crash at property initialization in constructor after smartcast
• KT-56379 K2: build tests for the Kotlin standard library
• KT-56079 K2: build YouTrack 2022.3
• KT-57092 K2: false-positive multiple inherited implementations error
• KT-56696 K2: Allow to access uninitialized member properties in non-inPlace lambdas in class initialization
• KT-56354 K2/MPP: unresolved references to library entities
• KT-57095 K2: false-positive lack of type arguments error on raw cast of Base<*> to Derived: Base<T?>
• KT-56630 FIR: ClassCastException on compilation hierarchy with a raw type
• KT-57171 K2: Implement bytecode tests
• KT-57214 K2: compiler FIR crash on annotation usage before annotation class declaration
• KT-57204 K2: callable reference to mutable property of inherited by delegation superinterface isn't properly resolved
• KT-57195 K2: false-positive VAR_TYPE_MISMATCH_ON_OVERRIDE on changing property's platform type to non-nullable type when overriding
• KT-56814 K2. PsiElement is null inside IrClass. As a result ClassBuilder defineClass gets null as origin
• KT-54758 Deprecate ClassBuilderInterceptorExtension.interceptClassBuilderFactory and provide another method without dependency on K1
• KT-57253 K2: clean up callable reference logic in FIR2IR
• KT-56225 K2. “BackendException: Backend Internal error: Exception during IR lowering” error on incorrect constructor in inline class
• KT-56769 K2. Annotation applicability is ignored during compilation when there's use-site @target
• KT-56616 K2: cannot infer Java array type properly
• KT-57247 K2: false-positive INVALID_TYPE_OF_ANNOTATION_MEMBER on type-aliased vararg property
• KT-57206 K2: false-positive val reassignment error on synthetic property from generic class with overridden getter but not setter
• KT-56519 K2: Compiler crash on a function reference on companion receiver that inherits from outer class
• KT-56506 K1/K2 inconsistency: VAL_REASSIGNMENT on synthetic setter with different nullability
• KT-56877 K2: false-positive UNRESOLVED_LABEL for labeled this-expression in contract description
• KT-56863 K2: false-positive property initialization analysis errors after smartcast
• KT-56864 K2: Unexpected behavior with default parameter inheritance and function reference
• KT-56665 K2: false positive RECURSIVE_TYPEALIAS_EXPANSION
• KT-53966 K2 does not support SAM conversions with condition into Java/Kotlin functional interfaces
• KT-56659 FIR: Increment operator on object leads to exception from resolve
• KT-56771 FIR: Increment operator on qualified expressions leads to exception from resolve
• KT-56759 K2: False-positive UNRESOLVED_REFERENCE on labeled desctructuring declaration in LT mode
• KT-56548 K2: false positive overload resolution ambiguity for Java record constructor
• KT-56476 K2: false positive NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY at inline fun use-site
• KT-56138 K2: Illegal conversion of lambda with parameters to ExtensionFunction expected type
• KT-56448 K2: False-positive unsafe call due to incorrect inference of smartcasted type
• KT-55966 K2: Not enough information to infer type variable K if smartcast is used
• KT-57168 K2: compiler FIR2IR crash on synthetic property from generic class with overridden getter but not setter
• KT-56876 K2: false-positive UNRESOLVED_REFERENCE for name of nested class in contract description
• KT-57194 K2: overload resolution doesn't prioritize Double over Float
• KT-57067 Warning about expect/aсtual in the same module doesn't take into account absence of ‘actual’ modifier
• KT-56954 K2: function literals can be passed as arguments to parameters with kotlin.reflect function types
• KT-55423 K2: Implement CONTRACT_NOT_ALLOWED
• KT-56923 K2: no line number in bytecode when ASTORE exception in catch
• KT-56829 K2: compiler FIR2IR crash on passing to function a callable reference to nested class's constructor with default arguments
• KT-57029 Per-file caches fail on local inline function in an inline function
• KT-57085 K2: @Suppress is sensitive to its argument's case
• KT-57103 K1: AssertionError: Mismatching type arguments: 0 vs 1 + 0 when calling inline function with callable reference to generic synthetic property
• KT-57033 Make KtClassLiteralExpression stub based
• KT-57035 Make KtCollectionLiteralExpression stub based
• KT-40857 Invalid parameterized types for extension function on parameterized receiver when javaParameters=true
• KT-56154 Compiler backend crash on reference to Java synthetic property from generic class
• KT-56692 StackOverflow in PrivateInlineFunctionsReturningAnonymousObjectsChecker
• KT-55879 Modularized tests: fir.bench.language.version is used as API version, not language version
• KT-51821 ClassCastException on anonymous fun interface implementation when unrelated vararg is used
• KT-56820 K2: compiler FIR crash on Java field access after smartcast
• KT-56579 [K2/N] IR actualizer crashed with K2 on expect annotation marked with @OptionalExpectation, without actual.
• KT-56750 K2: “IllegalArgumentException: No argument for parameter VALUE_PARAMETER” when calling typealias method reference
• KT-55614 K2: consider serializing static enum members (values/valueOf/entries) to match K1 behavior
• KT-30507 Unsound smartcast if null assignment inside index place and plusAssign/minusAssign is used
• KT-56646 K2: “IllegalStateException: No single implementation found for: FUN FAKE_OVERRIDE” when compiling a functional interface
• KT-56334 K2: can't call expected function with default arguments
• KT-56514 K2 should report ACTUAL_TYPE_ALIAS_NOT_TO_CLASS
• KT-56522 K2 should report ACTUAL_FUNCTION_WITH_DEFAULT_ARGUMENTS
• KT-56910 Exception during IR lowering: Cannot determine lineNumber of element FUN name:cancelProgress
• KT-56542 K2: false positive TOO_MANY_ARGUMENTS in VarHandle.set call
• KT-56861 FIR: test FirPluginBlackBoxCodegenTestGenerated.testClassWithAllPropertiesConstructor is failing with runtime error
• KT-56234 K2: “ISE: Expected value generated with NEW” with inline property setter and noinline parameter
• KT-56722 K2: cannot resolve component call after smart cast
• KT-56875 K2: isOperator flag is incorrectly set for java methods
• KT-56714 K2: wrong argument mapping in DSL
• KT-56723 K2: lambda accidentally returns Unit? instead of Unit
• KT-55877 K2: Secondary constructor without call to parent: no frontend error, ISE: “Null argument in ExpressionCodegen for parameter VALUE_PARAMETER”
• KT-56386 K2: Make possible to access Java field which is shadowed by Kotlin invisible property`
• KT-56862 Compatibility problem with using Kotlin in Intellij 223 or higher because of missing particular trove4j dependency
• KT-55088 JS, Native compilation fail with internal error on SomeEnum.entries reference when SomeEnum is from klib compiled with disabled EnumEntries language feature
• KT-40904 No warning when declare actual in the same target (module) as expect
• KT-56707 K2: Unexpected TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM where only getter type specified explicitly
• KT-56508 Context receivers: Internal compiler error when compiling code containing a class with a secondary constructor
• KT-56706 K2: False-positive ARGUMENT_TYPE_MISMATCH for generic nested types from library
• KT-56505 K2: Missing NO_EXPLICIT_VISIBILITY_IN_API_MODE errors on various declarations
• KT-56682 K2: False-negative UNINITIALIZED_VARIABLE on access to delegated property
• KT-56678 K2: False-negative UNINITIALIZED_VARIABLE if corresponding variable has initializer
• KT-56612 K2: false positive NO_TYPE_ARGUMENTS_ON_RHS on raw cast with type alias based argument
• KT-56445 K2: False-positive unresolved reference to callable reference to function with default argument
• KT-55024 K2: overload resolution ambiguity/unresolved reference if variable is smart-casted to an invisible internal class
• KT-55722 K2: Incorrect OVERLOAD_RESOLUTION_AMBIGUITY with smart cast on dispatch receiver (simple)
• KT-56563 Inference within if stops working when changing expected type from Any to a different type
• KT-55936 K2: Support proper resolution of callable references as last statements in lambda
• KT-45989 FIR: wrong callable reference type inferred
• KT-55169 K2: False-negative NO_ELSE_IN_WHEN
• KT-55932 K2. No compiler error when elvis operator returns not matched type
• KT-53987 K2: False negative “TYPE_MISMATCH” with if statement return
• KT-41038 NI: TYPE_MISMATCH when passing constructor of nested class
• KT-42449 Can not resolve property for value of type Any even after casting type to a type with star projection
• KT-52934 StackOverflow from PseudocodeTraverserKt.collectDataFromSubgraph with if inside finally
• KT-52860 StackOverflowError when casting involving recursive generics and star projection
• KT-52424 ClassCastException: Wrong smartcast to Nothing? with if-else in nullable lambda parameter
• KT-52262 TYPE_MISMATCH: Nonnull smartcasting fails with non-exhaustive when
• KT-52502 Forbid extension calls on inline functional parameters
• KT-51045 SETTER_PROJECTED_OUT: Star projected nullable property can't be set to null
• KT-40480 [FIR] Support hasStableParameterName from metadata
• KT-50134 NI: Type inference regression in java streams groupingBy
• KT-50160 False positive “USELESS_CAST” caused by indexed access operator
• KT-42715 Unable to use implicit lambda param it for overloaded methods
• KT-49045 False positive USELESS_CAST in generic type with nullable type parameter
• KT-49024 AssertionError: Variance conflict: type parameter variance ‘out’ and projection kind ‘in’ cannot be combined
• KT-48975 Type mismatch: inferred type is X but Nothing! was expected with the AssertJ latest version
• KT-47870 INVISIBLE_MEMBER: Kotlin class can't access protected annotation defined in Java parent class
• KT-47495 ReenteringLazyValueComputationException on invalid code
• KT-47490 Missed diagnostic for incorrect callable reference in finally
• KT-47484 “Recursion detected in a lazy value under LockBasedStorageManager” on invalid code
• KT-46301 Combining branches with sealed interfaces in when breaks type inference
• KT-44392 False negative: redundant nullability/not null check on cast with as operator
• KT-43936 Recursion detected on input: ANNOTATION_ENTRY with annotation on star-imported nested class
• KT-43846 No smart cast when returning function closures with captured smart-cast variable
• KT-43603 False positive USELESS_CAST leads to TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM on “when” with smart cast and extension property
• KT-43553 JVM / IR: “AssertionError: Unbound symbols not allowed” caused by annotation class with TYPE target
• KT-42169 False negative CAST_NEVER_SUCCEEDS for incompatible types with generic parameter and star projection
• KT-42136 NI: False positive [USELESS_CAST] when list serves to create a mutable list
• KT-41721 SAM conversion fails on varargs with type approximated to Nothing
• KT-38288 Unresolved reference for type parameter upper bound of nested class when outer class extends it with star projected type argument
• KT-37490 NULL_FOR_NONNULL_TYPE: “Null can not be a value of a non-null type Nothing” when null is passed to nullable argument of type projected method
• KT-37365 NPE from ReflectionReferencesGenerator.generateCallableReference with inner class function reference and wrong parenthesis
• KT-36958 NI: missed unresolved on parenthesized callable reference passing through call (back-ends throw an exception)
• KT-30756 No smartcast if elvis operator as a smartcast source in while or do-while is used as the last statement
• KT-24737 Report an error on invalid this-expression with angle brackets on left-hand side of a callable reference
• KT-21463 Compiler doesn't take into accout a type parameter upper bound if a corresponding type argument is in projection
• KT-6822 Smart cast doesn't work inside local returned expression in lambda
• KT-55840 Inconsistency between members of enums in bytecode between FE 1.0 + JVM IR and FIR + JVM IR
• KT-47815 JVM: “Recursion detected in a lazy value under LockBasedStorageManager” when trying to inherit interface from a class with non-trivial function
• KT-17817 No error reported on invalid LHS for class literal
• KT-47373 Missed diagnostics on/after non-null assertion (!!) on generic class class use with class literal
• KT-51143 Wrong Unit-requiring at if/when branch with stub types
• KT-53671 False-positive diagnostic reported on OptIn annotation import from root package
• KT-53494 Mistaken type inference in compound ‘if’ expression with nullability check and covariant type
• KT-28668 “AssertionError: Unrelated types in SAM conversion for index variable” if lambda argument of ‘[...]’ in LHS of augmented assignment is used as an implementation for different SAM interfaces
• KT-55931 Inference for callable reference inside synthetic calls for if/when/try/etc stops working when brought into lambda for a call
• KT-20223 Inline access check ignores operator calls to invoke()
• KT-54478 @NoInfer causes CONFLICTING_OVERLOADS
• KT-56472 K2: Add stack of all FIR elements to CheckerContext
• KT-41126 [FIR] Inconsistency of a compiler behaviour at init block for an enum entry with and without a qualifier name
• KT-54931 Annotations defined in nested classes cannot be instantiated directly
• KT-52338 “IncompatibleClassChangeError: Expected non-static field” with Kotlin class with same-named companion object property as base Java class field
• KT-24901 No smart cast for when with early return
• KT-53086 “Cannot access ‘’ before superclass constructor has been called” with inner class secondary constructor
• KT-55137 Callable references with conversion are incorrectly allowed to be promoted to KFunction
• KT-30497 EXACTLY_ONCE contract doesn't work in a function with vararg parameter
• KT-47074 Front-end Internal error: Failed to analyze declaration State / java.lang.IllegalStateException: Should not be called! when try to add Parcelize
• KT-24503 Return-as-expression is allowed as this/super constructor parameter
• KT-55379 False positive NO_ELSE_IN_WHEN with smartcast to Boolean
• KT-47750 False positive NO_ELSE_IN_WHEN in presence of smartcast to sealed interface
• KT-53819 False positive UNINITIALIZED_VARIABLE with secondary constructor and custom property getter in local class
• KT-56457 JVM: Enum.entries are not annotated with @NotNull
• KT-56072 K2. “IllegalStateException: Fir2IrSimpleFunctionSymbol for is already bound” when trying to access java synthetic property of inherited class
• KT-50082 Kotlin non-overriding property of subclass doesn't shadow same-named Java field from base class
• KT-55822 False positive ABSTRACT_CLASS_MEMBER_NOT_IMPLEMENTED with raw types and mixed overridden members
• KT-55666 K2: label on local function is rejected: “Target label does not denote a function”
• KT-56283 False-positive INVISIBLE_MEMBER on overridden member of more specific type after smart cast
• KT-51969 [FIR] Compilation for expect value class fails with “Fir2IrSimpleFunctionSymbol for [declaration] is already bound”
• KT-56329 K2: compiler backend crash on two expected functions with similar signatures
• KT-56361 K2/MPP: receiver isn't available in lambda literals with receiver
• KT-55295 K2/MPP: JS build functionality
• KT-55909 [K2/N] IndexOutOfBoundsException for a reference to a function defined in companion object superclass
• KT-55664 K2: eliminate ClassId.isSame call from FirClass.isSubclassOf
• KT-56353 K2. False negative “Unresolved reference” in default value of secondary constructor's parameter
• KT-56381 K2: Function type kind not extracted from lambda literal in generic call
• KT-55747 K2. “Convention for ‘mod’ is forbidden. Use ‘rem’” error is missing
• KT-56104 Unnecessary inner classes attributes in class files for subclasses
• KT-55570 K2: ACTUAL_WITHOUT_EXPECT error is not reported on a simple actual class
• KT-56176 [K2/N] “IllegalStateException: actual type is kotlin.Int, expected kotlin.Long” when expected type uses typealias
• KT-56229 K2: IllegalStateException (already bound) for triangle-like dependencies scheme with MPP scenario
• KT-56199 K2 + MPP + kotlinx.serialization: java.lang.VerifyError: Bad type on operand stack in aaload
• KT-56212 K2: Exception when compiling extension function declaration with illegally chained type parameter receiver
• KT-55503 K2: “Argument type mismatch” caused by using the wrong “this”
• KT-56050 K2: inconsistency regarding visibility of synthetic properties with protected getter and public setter
• KT-49663 FIR: Support @kotlin.jvm.PurelyImplements for java collections
• KT-55468 [K2/N] Crash with debuginfo caused by changed tree using IMPLICIT_COERCION_TO_UNIT
• KT-56269 [K2/N] Don't test “Tailrec is not allowed on open members” in K2
• KT-54647 K2: Function call with Lambda on LHS of assignment leads to KotlinExceptionWithAttachments: FirDeclaration was not found for class org.jetbrains.kotlin.psi.KtFunctionLiteral
• KT-54648 K2: Function call on left side of erroneous assignment isn't resolved
• KT-55699 K2. False Negative “Type parameter T is not an expression”
• KT-56132 Restore ‘JvmBackendContext’ constructor signature for compatibility
• KT-55973 K2: Exception from UnusedChecker on an unused destructuring
• KT-56275 K2 IDE: Missed error for enum super type
• KT-54775 K2. “IllegalStateException: Expected FirResolvedTypeRef with ConeKotlinType but was FirImplicitTypeRefImpl ” exception on incorrect code
• KT-55528 K2: CFA for property initialization analysis is not run for class initialization graphs
• KT-54410 K2: Deprecation warning instead of “this declaration is only available since Kotlin X” when language version in project are below required to use language feature
• KT-55186 K2: No compilation error on calling exception without constructor
• KT-36776 Treat special constructions (if, when, try) as a usual calls when there is expected type
• KT-50947 False negative: FE 1.0 doesn't report type variance conflict error on an inner type
• KT-39041 Collection literals should not be allowed inside annotation classes
• KT-54694 Consider enabling BooleanElvisBoundSmartCasts in K1 or K2
• KT-54587 K2. CCE on compilation when some operator fun is needed and it is implemented as an extension function for another class
• KT-52774 Resolve unqualified enum constants based on expected type

Docs & Examples

• KT-53643 Update coding style conventions to include rangeUntil operator
• KT-57902 Create migration tutorial from kotlin-js to kotlin-multiplatform gradle plugin
• KT-58381 [Docs][Libraries] Document Path.createParentDirectories

IDE

Performance Improvements

• KTIJ-23501 Make main run configuration detection lighter
• KT-56613 Reduce memory consumption of light classes

Fixes

• KTIJ-25855 Infinite “Analyzing...” on .kt files from native source-set
• KTIJ-25448 When project JDK is less than one defines in jvmToolchain block run with Idea fails with has been compiled by a more recent version of the Java Runtime
• KTIJ-25673 Temporarily switch off adding jvmToolchain to new/converted Kotlin projects
• KTIJ-25719 K/Wasm: Fix import of wasm projects with Kotlin 1.9.0
• KTIJ-24136 Files with actual declarations are not highlighted in kotlinx.coroutines project
• KTIJ-24390 Kotlin assignment plugin: Imports are not recognized in build logic .kt files for Gradle build
• KTIJ-24695 Default Kotlin project can not be synced on Mac M1
• KTIJ-25302 Wrong variant of serialization plugins is passed to JPS build if the project was imported from Gradle
• KTIJ-25416 “Add import” works incorrectly without formatting the code for root package
• KT-57849 K2: contract violation due to implicit java type with annotation
• KTIJ-24666 Store annotation arguments in cls
• KTIJ-24667 Store constant expressions in cls
• KTIJ-24665 Store contracts in cls
• KTIJ-24543 An option to configure kotlin with JavaScript is available at Tools -> Kotlin menu
• KT-57857 LC: FakeFileForLightClass: Read access is allowed from inside read-action
• KTIJ-25172 Store flexible types in cls
• KT-57578 SLC: incorrect upper bound wildcards
• KT-57917 Analysis API: decompiled value parameters are not resolved
• KT-56046 K2 IDE: Avoid redundant resolve from annotations
• KT-57569 SLC: incorrect visibility for lateinit var with private setter
• KT-57547 SLC: non-last vararg value parameter type mismatch
• KTIJ-25034 K2 IDE: unresolved import treated as unused
• KT-57548 SLC: incorrect inheritance list for Comparator
• KT-56843 Light classes: certain kinds of constant values in property initializers aren't supported
• KTIJ-24676 Enum.entries is red if it's called on enum class from JDK or module without stdlib in dependencies
• KT-56868 SLC: IncorrectOperationException on enum annotation arguments that are not valid Java identifiers
• KTIJ-25048 K2: IDE K2: “Unexpected scope FirNameAwareCompositeScope”
• KTIJ-24895 K2 IDE: “Invalid FirDeclarationOrigin Synthetic” exception for synthetic “WHEN_CALL” function during highlighting
• KT-56833 Light classes: Accessors to lateinit properties don't have @NotNull annotations
• KTIJ-24768 IDE K2: “IllegalArgumentException Failed requirement at FirJvmTypeMapper”
• KT-56845 Light classes: Overridden property accessors don't have @Override annotation
• KT-56441 K2 IDE: reference from Java to ObjectName.INSTANCE of private object is red in IDE, but compiled successfully
• KT-56891 Symbol Classes: DefaultImpls classes contain methods without default implementation
• KTIJ-24742 K2 IDE: InvalidFirElementTypeException
• KTIJ-24067 K2 IDE: references from .java source to top-level Kotlin members from dependencies are unresolved
• KT-56842 Light Classes: Primitive-backed context receiver parameters shouldn't be marked with @NotNull
• KT-56835 Light classes: Underlying fields for delegated properties should be marked as final and @NotNull
• KT-56840 Light Classes: Inline classes backed by Java primitives shouldn't be marked with @NotNull
• KT-56728 K2 IDE. False positive not applicable to for kotlin annotation with target annotating Java element
• KTIJ-24610 K2: Exception from import optimizer: “Unexpected qualifier ‘10’ of type 'KtConstantExpression`”
• KTIJ-24476 Make application services to be classes instead of objects
• KTIJ-24574 K2 IDE: “No fir element was found for” from inspections
• KT-55815 SLC: Keep annotations on type when converting to PsiType
• KT-55669 K2 IDE: INRE from light classes
• KTIJ-24530 K2 IDE: status resolution fails with CCE
• KTIJ-23937 K2: No ‘JavaSymbolProvider’ in array owner: Source session for module
• KTIJ-24087 K2: Type parameter bounds found not analyzed during call inference
• KTIJ-24344 K2 IDE: Object reference incorrectly resolves to ‘invoke’ operator function
• KTIJ-24107 K2 IDE: Unresolved call for qualified companion invoke()
• KTIJ-24385 K2 IDE: KtCallExpression(KtCallExpression) should always resolve to a KtCallInfo

IDE. Code Style, Formatting

• KTIJ-24928 Organize imports puts imports in one line if Formatter option is used

IDE. Completion

• KTIJ-25108 K2 IDE: Code completion in Java context for Kotlin top level members: “Slow operations are prohibited on EDT” through KtAnalysisScopeProviderImpl.canBeAnalysed()
• KTIJ-24989 K2 IDE: completion should show information about expanded types for type alias parameters
• KTIJ-24992 K2 IDE: completion shows return type with incorrect nullability when type is stub type
• KTIJ-24948 K2 IDE: “ERROR: class org.jetbrains.kotlin.fir.types.jvm.FirJavaTypeRef cannot be cast to class org.jetbrains.kotlin.fir.types.FirResolvedTypeRef” during completion of inner classes' constructors
• KTIJ-24256 K2 IDE: Angle brackets are missing in completion of function with type parameters
• KTIJ-24083 K2, Completion: Exception on adding a type parameter receiver to a function
• KTIJ-23963 K2 IDE: Completion in Kotlin suggests overriding a Java field; fails with “Unknown member to override”
• KTIJ-22359 K2 IDE: no completion for Java synthetic properties from super class
• KTIJ-23880 Completion doesn't work for Java synthetic property reference

IDE. Decompiler, Indexing, Stubs

• KTIJ-25152 Kotlin Bytecode tool window: ISE Symbol with IrSimpleFunctionSymbolImpl is unbound on actual callable with argument in mpp project with IR
• KTIJ-24475 Migrate kotlin index extension implementation from object to classes
• KTIJ-24335 Kotlin Bytecode tool window: NoSuchElementException caused by duplicate Boolean type descriptor in JvmSharedVariablesManager.getProvider
• KTIJ-24206 Kotlin Bytecode tool window: “Unhandled intrinsic in ExpressionCodegen” when compiling a source file with an expect function
• KTIJ-15764 IR by default in Kotlin bytecode tool window

IDE. Gradle Integration

• KT-59034 MPP build failed with “Factory type is not known for plugin variants” in kt-231-*
• KT-56671 KGP import: K/N distribution libraries should'n be resolved for IDE by KGP with package names
• KTIJ-24573 KGP-based import: commonized cinterop libraries don't include source set targets, unsupported by host
• KTIJ-25757 KJS: 1.9.0-Beta fails to run when running in Android Studio
• KTIJ-24701 KGP import: JVM+Android shared source sets don't receive a correct default stdlib dependency
• KTIJ-24745 IDE sync of kotlin(“js”) projects with js(BOTH) set fails with exception because of the new MPP IDE import
• KTIJ-24567 Enable KGP dependency resolution by default
• KTIJ-24729 KotlinMPPGradleProjectResolverKt must not be requested from main classloader on project import
• KTIJ-11978 IDE does not recognize the sources JAR of a published to mavenLocal MPP library

IDE. Inspections and Intentions

• KTIJ-24684 K2 IDE: ‘Redundant qualifier name’ false positive in type specification in extension function
• KTIJ-24662 K2 IDE: False positive “Redundant qualifier name” inspection for nested class from base interface
• KTIJ-25232 K2 IDE: “Redundant qualifier name” inspection false positive with object referenced via property
• KTIJ-25447 Make Enum.entries and RangeUntil inspections don't check for opt-in when APIs become stable
• KTIJ-23588 K2 IDE. False positive unused import directive for extension function of an object
• KTIJ-25112 K2 IDE: False positive “Actual value of parameter ‘b’ is always ‘null’”
• KTIJ-24485 Explicit API mode: false positive “redundant ‘public’ modifier”
• KTIJ-24453 Unsuccessfull resolve error from OperatorToFunctionIntention on recursive property declaration

IDE. JS

• KT-58427 Kotlin Gradle Plugin ignores language version value for Kotlin/JS sources

IDE. Libraries

• KTIJ-25096 K2 IDE: Library sessions are garbage collected between performance test runs with enabled library caches
• KTIJ-24413 Cannot navigate to enum of the Kotlin library via entries call

IDE. Misc

• KT-58763 K2 IDE: NoSuchMethodError: KtPsiFactory$Companion.contextual
• KTIJ-25304 Move IDE Extension Points from compiler.xml to the IDE repository
• KTIJ-24893 K2 IDE: Serializable plugin causes infinite resolve recursion

IDE. Multiplatform

• KTIJ-25859 MPP: Library wizard with android target uses deprecated androidTest source set
• KTIJ-25479 Compiler options is not imported correctly for js source sets
• KTIJ-24011 MPP: Native tests are missing run gutters

IDE. Navigation

• KTIJ-23073 K2 IDE: Navigation doesn't work from library sources to another library sources
• KTIJ-24819 K2 IDE: support compiler reference index
• KTIJ-24697 K2 IDE: handling PresistenceMap in LLFirSessionsCache takes a lot of time
• KTIJ-24373 K2 IDE: Qualified generic type is not fully resolved

IDE. Run Configurations

• KTIJ-25046 K2 IDE. Junit5 test method with internal modifier can't be launched using gutter

IDE. Wizards

• KTIJ-25932 Turn off the adding new targets in Kotlin Multiplatform Wizard
• KTIJ-26022 Project module not selected in a second page of “New Project” window in KMP wizard
• KTIJ-24834 Set default for “kotlin.mpp.experimental” flag for K/JS features to true

JavaScript

New Features

• KT-12784 JS: generate ES2015 compatible modules
• KT-48154 KJS / IR: Inline members support for external types
• KT-51582 FIR: support basic compile-time evaluation for JS backend

Fixes

• KT-43490 KJS / IR: “Cannot set property message of Error which has only a getter” caused by class that is child of Throwable
• KT-57690 K2/MPP: compileProductionLibraryKotlinJs fails with Module has a reference to symbol kotlin/arrayOf|3204918726020768747[0]. Neither the module itself nor its dependencies contain such declaration
• KT-56911 K2/MPP: Compile K/JS fails for @Serializable annotation with class IrDeclarationOrigin$GeneratedByPlugin cannot be cast to class IrDeclarationOriginImpl
• KT-56950 Support KLIB IC with K2
• KT-58570 KJS: ES6 classes + PL throw java.lang.NullPointerException
• KT-58835 K2/JS: Fix incremental compilation klib tests
• KT-58794 KJS / K2: Assertion failed with Space build
• KT-51706 Partial linkage: in case of absent symbol referred from declaration Native compiler is successful, JavaScript fails
• KT-54452 Kotlin/JS libraries with “joined” legacy+IR content: publish IR sources for them
• KT-53180 Kotlin/JS: generated TypeScript constructor can have “TS1016: A required parameter cannot follow an optional parameter” error with certain properties order
• KT-39650 KJS IR: provide a way to enable ES2015 class generation
• KT-57990 KJS/IR. Invalid super call for final parent methods (ES classes)
• KT-58246 KJS: ES15 classses — duplicated code in class constructor
• KT-57479 KJS: Add an annotation for a function parameter which checks that a passed argument has an external type
• KT-58201 Unknown statement type when building with ES modules
• KT-30810 values and valueOf are miscompiled for external enum classes
• KT-57024 Ugly TypeScript definitions for declarations with both @JsExport and @Serializable
• KT-56237 KJS + IC: Adding or removing interface default implementation doesn‘t invalidate children and doesn’t update JS code
• KT-54638 K2/JS: Fir2ir - implement and use JS-specific mangler
• KT-54028 Native / JS: Using private object implementing a sealed interface causes a linker error
• KT-57423 KJS: Add an annotation for external interfaces which allows to be inherited only by other external interfaces, classes or objects
• KT-57711 K2: Native & JS fail to compile a KLIB that uses const val from a dependency KLIB
• KT-57078 JS IC: Unbound symbol left in SymbolTable in JsIr[ES6]InvalidationTestGenerated.testBreakKlibBinaryCompatibilityWithVariance tests
• KT-57254 Deprecate external enum declarations
• KT-57002 KJS: “JsParserException: missing name after . operator” when a js(...) block contains an interpolated constant
• KT-56961 JS IR: serializedIrFileFingerprints in klib manifest has a wrong format
• KT-56282 KJS: Invalidate incremental cache in case of compiler internal errors

KMM Plugin

• KT-55402 “Framework not found SQLCipher”: after selection of “Regular framework” as “iOS framework distribution” and installing SqlCihper through CocoaPods
• KT-55988 KN debugger in KMM plugin for Android Studio can't recognize the source code

Language Design

New Features

• KT-48872 Provide modern and performant replacement for Enum.values()
• KT-15613 Introduce special syntax for the until operator
• KT-4107 Design and implement a solution for toString, equals and hashCode on objects (data object)

Fixes

• KT-28850 Prohibit protected visibility in final expected classes
• KT-39362 Expect fun interface must have actual fun interface counterpart
• KT-48994 Prohibit type unsound java fields assignments
• KT-58791 Prolongate PROGRESSION_CHANGE_RESOLVE diagnostics to 2.x
• KT-53778 Release stdlib API about “rangeUntil” operator in 1.9
• KT-53653 Export Enum.entries to Objective-C and Swift
• KT-55177 Deprecate declaration of expect and actual counterparts of same class in one module
• KT-49110 Prohibit access to members of companion of enum class from initializers of entries of this enum
• KT-47986 Forbid implicit inferring a type variable into an upper bound in the builder inference context
• KT-57395 Delay ForbidInferringPostponedTypeVariableIntoDeclaredUpperBound feature to LV 2.0
• KT-55082 Bump KLib version for Enum.entries
• KT-49264 Deprecate infix function calls of functions named “suspend” with dangling function literal

Libraries

New Features

• KT-58046 Stabilize remaining kotlin.time API: time sources, time marks, measureTime
• KT-58074 Stabilization of Atomics API in K/N
• KT-55268 Mutiplatform @Volatile annotation
• KT-51908 Provide common function for getting regex capture group by name
• KT-53263 Path.createParentDirectories
• KT-7637 Add toString() to standard delegates classes (NotNullVar, LazyVal, BlockingLazyVal, ...)
• KT-40728 Add AssertionError constructor with cause: Throwable parameter to common stdlib
• KT-57298 Avoid FileAlreadyExistsException from Path.createParentDirectories in case of parent is symlink

Performance Improvements

• KT-54739 build method in collection builders (Set, Map, List) should return a single instance for empty collections
• KT-42589 Provide common listOf(value) overload to avoid allocation of the vararg
• KT-55091 Stdlib: Sequence.toSet() and Sequence.toList() may create the collection twice
• KT-57617 Optimize ReversedListReadOnly iterator
• KT-57607 KJS: Bad performance for ArrayList.addAll

Fixes

• KT-58841 Serialization: NPE when obtaining a serializer of a sealed base class with a self-referencing property
• KT-57728 Explicitly specify level of stability of programmatically-accessible interoperability API
• KT-58985 Update KClass.isData KDoc
• KT-57762 Introduce HexFormat for formatting and parsing hexadecimals
• KT-55612 Stabilize experimental API for 1.9
• KT-58548 Stabilize standard library API for Enum.entries
• KT-56400 Disable compilation of atomicfu-runtime with legacy JS backend
• KT-58276 Deprecate redundant public declarations in kotlin.native.concurrent
• KT-35973 Extract org.w3c declarations from stdlib-js
• KT-58073 JS/Legacy compiler blocks compilation of kotlinx.atomicfu with K2
• KT-57317 Repack EnumEntries from stdlib into the compiler
• KT-54702 Native: mark Worker and related APIs as obsolete
• KT-55610 Deprecate kotlin.jvm.Volatile annotation in platforms except JVM
• KT-57404 Native: Support AnnotationTarget.TYPE_PARAMETER
• KT-57318 Change EnumEntries stdlib implementation to be eager
• KT-57137 Native: Consider removing ArrayAsList
• KT-56661 Missing EnumEntries-related bytecode in kotlin-stdlib-1.9.255-SNAPSHOT.jar
• KT-51579 PlatformImplementations loading is not compatible with graalvm native-image --no-fallback

Native

• KT-54098 Decommission and remove ‘enableEndorsedLibs’ flag from Gradle setup
• KT-52594 Provide Alpha support for Native in the K2 platform
• KT-56071 K2/MPP: Native build functionality
• KT-56218 [K2/N] Receiver annotations for properties are not serialized
• KT-56326 [K2/N] RemoveRedundantCallsToStaticInitializersPhase removes important static initializer
• KT-27002 lateinit intrinsics frontend checkers aren't applied on Native

Native. Build Infrastructure

• KT-58160 Native: performance build configuration fails with NoSuchMethodError: ‘boolean kotlinx.coroutines.CompletableDeferredKt.completeWith(kotlinx.coroutines.CompletableDeferred, java.lang.Object)’

Native. C and ObjC Import

• KT-54610 Kotlin Native can't call objc_direct functions
• KT-57918 [K2/N] Support typealiases in FirClassSymbol<*>.selfOrAnySuperClass()
• KT-58651 Native c-interop tool generates broken @Deprecated annotations
• KT-57541 Compilation fails without explicit cast on cinterop code
• KT-54805 KMP ios memory leak when using CA Layer
• KT-57490 [K/N] Duplicate package names for cinterop klibs with objc protocols fails to link

Native. ObjC Export

• KT-58839 K/N: Exception during HiddenFromObjC marked class extension function compiling
• KT-56464 K/N: Allow HiddenFromObjC for classes
• KT-57507 K2: Set of Objc exported declarations is different between K1 and K2

Native. Runtime

• KT-58441 Kotlin/Native: @ObjCAction @ObjCOutlet generate bridges without switching state
• KT-57091 Align Native and Java file/class initialization behavior

Native. Runtime. Memory

• KT-56233 [Kotlin/Native] Crash when enum values are accessed in multiple threads
• KT-58130 Implement preview of custom allocator for Kotlin/Native
• KT-56402 Native: if a Kotlin peer for an Obj-C object is created on the main thread, then Kotlin runtime should run objc_release for it on the main thread

Native. Stdlib

• KT-57344 Try to remove strange .equals overload on primitive types
• KT-57592 Native: Remove the default parameter value for AtomicLong constructor

Native. Testing

• KT-57349 Enable more K2 MPP codegen/box tests for Kotlin/Native
• KT-57026 K2: Fix Native test infrastructure for MPP

Reflection

• KT-54833 Reflection: Incorrect behaviour for Field.kotlinProperty function in companion objects
• KT-56650 ArrayStoreException from InlineClassAwareCaller.call with an array of inline class
• KT-56093 Metaspace leak in a Gradle plugin built with Kotlin 1.8.0
• KT-55937 Optimize implementation of kotlinFunction/kotlinProperty

Specification

• KT-58932 Specify the priority between candidates with type and value receivers when doing callable reference inference
• KT-54254 Specify that an annotation type cannot have itself as a nested element
• KT-53427 Specify @SubclassOptInRequired
• KT-53323 Add Enum.entries to Kotlin specification, KEEP-283
• KT-54255 Specify extension receivers are effectively noinline
• KT-53646 Incorporate rangeUntil (..<) operator into specification

Tools. CLI

• KT-57495 Add JVM target bytecode version 20
• KT-57154 Incorrect version of JDK is provided through CoreJrtFs
• KT-56209 Add CLI support for HMPP in K2
• KT-58351 Confusing error message when using removed -Xjvm-default mode value
• KT-57535 K2: Kotlin command line compiler doesn't see class files on the class path in 2.0
• KT-57644 K2: Prohibit passing HMPP module structure with CLI arguments to metadata compiler
• KT-56351 Reduce memory usage spent on compiler settings

Tools. Commonizer

• KT-57796 NoSuchFileException in :module-B:commonizeCInterop with Kotlin 1.8.20
• KT-56207 Investigate failing tests in ClassifierCommonizationFromSourcesTest

Tools. Compiler Plugins

Fixes

• KT-57821 K2: Compiler calls declaration generation plugins twice for classes in the common source set
• KT-57406 FIR Compiler plugins: Assignment plugin incorrectly recognizes qualified names of annotations
• KT-57626 K2: SERIALIZER_NOT_FOUND for serializable class from another module
• KT-57400 FIR Compiler Plugins: annotated predicate does not work with Java classes
• KT-57140 K2: Implement backwards compatibility for FirFunctionTypeKindExtension
• KT-56685 K2: ArrayIndexOfBound during session creation if compiler plugins are enabled
• KT-55375 Remove “legacy” mode of jvm-abi-gen plugin
• KT-53470 FIR: pass MemberGenerationContext to all methods of FirDeclarationGenerationExtension
• KT-51092 Lombok @Value causes IllegalAccessError
• KT-55885 K2 plugin API: Backend-only declarations are not visible from other modules
• KT-55584 K2: Improve registration of session components from compiler plugins
• KT-55843 FIR Plugin API: metaAnnotated predicate returns meta-annotation itself as well
• KT-53874 Optimize checking for plugin applicability and redesign DeclarationPredicates

Tools. Compiler plugins. Serialization

Fixes

• KT-58954 Serialization: NPE at run time when accessing a delegating property of a deserialized object
• KT-56537 Serialization: Presence of (transient) delegated field in the serialized class breaks deserialization
• KT-58918 Serialization: NPE at run time obtaining a serializer for a sealed class with a generic self-referencing property
• KT-59113 Serialization: NPE at run time when accessing a delegating property of a deserialized object
• KT-57647 Serialization: “IllegalAccessError: Update to static final field” caused by serializable value class
• KT-57704 K2/serialization: false-positive SERIALIZER_NOT_FOUND when compiling against 1.7.20 binary with enum class
• KT-57083 K2/serialization: can't resolve serializers for classes from other modules
• KT-56480 K2: false-positive warning about incompatible serializer type when using type aliases
• KT-56594 K2/serialization reports SERIALIZER_NOT_FOUND over aliased String or primitive types
• KT-56553 Support ‘serialization plugin intrinsics’ feature in K2
• KT-56244 kotlinx.serialization compiler intrinsic does not work with encodeToString function in 1.8.0

Tools. Daemon

• KT-50846 Remove “new” Kotlin daemon from codebase

Tools. Gradle

New Features

• KT-56971 Expose jvmTargetValidationMode property in KotlinCompile Gradle task
• KT-57159 Add project level compiler options for Kotlin/JVM plugin

Performance Improvements

• KT-57052 Gradle: Stop using exceptions for flow control
• KT-57757 Reduce classpath snapshotter memory consumption
• KT-56052 Implement an in-memory wrapper for PersistentHashMap to avoid applying changes to IC caches before successful compilation

Fixes

• KT-55624 Update KGP integration tests that use removed in Gradle 8 getClassifier method
• KT-59589 Gradle: ‘java.lang.NoClassDefFoundError: com/gradle/scan/plugin/BuildScanExtension’ on 1.9.0-RC when applying Enterprise Plugin from initscript
• KT-59063 Explicit API mode broken in Kotlin 1.9.0-Beta
• KT-57653 Explicit API mode is not enabled when free compiler arguments are specified in Gradle project
• KT-59256 [1.9.0-Beta] ServiceLoader does not pick up classes defined in the same project
• KT-58662 Gradle 8.1 + Configuration Cache: custom values data is missing from build report
• KT-58280 org.jetbrains.kotlin.jvm Gradle plugin contributes build directories to the test compile classpath
• KT-59191 Actual compilation failure exception might be hidden in the case of a Kotlin daemon crash
• KT-56211 Improve Kotlin build reports
• KT-57767 Gradle: “ZipException: invalid entry size” with 1.8.20
• KT-57736 K2: Introduce an easy way to try K2 compiler in Gradle user projects
• KT-59056 FreeCompilerArgs options added using ‘subprojects’ extension override module-level freeCompilerArgs options
• KT-55740 Gradle 8: Listener registration using Gradle.addBuildListener() has been deprecated
• KT-37652 Support explicit mode for Android projects
• KT-58251 Build Statistics. Kotlin-specific tags are missing in build scans if projects use Gradle 8+
• KT-57224 Add an indicator into build metrics report to show whether K1 or K2 compiler was used to compile the code
• KT-58571 ExplicitApi mode should not apply for test compilations
• KT-42718 Test and AndroidTest sources should be excluded from explicit API requirements for libraries
• KT-58916 [1.9.0-Beta] PLUGIN_CLASSPATH_CONFIGURATION_NAME and NATIVE_COMPILER_PLUGIN_CLASSPATH_CONFIGURATION_NAME should stay public or offer an alternative API
• KT-58869 K2, Gradle: Improve message “100% (2/2) tasks have compiled with Kotlin 2”
• KT-52811 Kotlin Serialization metadata issue due to incompatibility between Gradle Kotlin embedded version and Kotlin Gradle Plugin version
• KT-57330 Provide collection of usage statistics for the Dokka
• KT-57393 jvm-target value set through ‘android.kotlinOptions’ is ignored and overwritten with the default 1.8 value
• KT-58745 KaptGenerateStubs task should also be configured with the same compiler plugin options
• KT-58682 Explicit api mode does not apply in MPP projects
• KT-52976 Remove deprecated Gradle conventions usages
• KT-58530 Compiler plugin unbundling changes should be backward compatible with Kotlin plugin
• KT-36904 Adding folders to sourceSets.resources.srcDir() in Gradle script does not work
• KT-58313 An exception in console if no task is executed and file build reports are enabled
• KT-58619 Move all pm20 interfaces into Gradle plugin codebase
• KT-58320 Kotlin daemon OOM help message is missing on OOM in Kotlin Daemon itself
• KT-53923 Add ‘progressive’ compiler argument to Gradle compiler options
• KT-53924 Add ‘optIn’ compiler arguments to Gradle compiler options
• KT-53748 Remove KotlinCompile setClasspath/getClasspath methods
• KT-56454 Bump minimal support AGP version to 4.2.2
• KT-57397 Add infrastructure to use the build-tools-api to run compilation from Gradle
• KT-56946 Switch incremental Gradle tests for K2 to use language version 2.0
• KT-57782 Disable daemon fallback strategy for Gradle integration tests by default
• KT-57142 Split org.jetbrains.kotlin.gradle.tasks/Tasks.kt into several source files
• KT-54447 Remove usage of deprecated internal Gradle field in Kotlin Gradle Plugin, replace with equivalent in public API
• KT-49785 Avoid creating task output backups until really needed
• KT-56047 False positive message about full recompilation is displayed while restoring from build cache and then making a syntax error
• KT-56421 Gradle: plugin should not use BasePluginExtension deprecated properties
• KT-55241 Gradle: the VariantImplementationFactories build service state is not persistent making impossible to access factories with configuration cache lazily
• KT-56357 Gradle: “DefaultTaskCollection#configureEach(Action) on task set cannot be executed in the current context” because of VariantImplementationFactories
• KT-56352 Make build scan reports more readable
• KT-55972 Gradle: Add an assertion to all integration tests if warningMode is not FAIL, but the build doesn't produce any warnings

Tools. Gradle. Cocoapods

• KT-38749 Support reusing generated C-interop between dependant pods
• KT-54161 Support adding extra code to generated Podfile from the Kotlin gradle plugin
• KT-56162 Provide granular Gradle warnings suppression for CocoaPodsIT

Tools. Gradle. JS

New Features

• KT-48791 KJS: Support for Power(ppc64le) and Z(s390x)
• KT-32209 org.jetbrains.kotlin.js does not respect Gradle's archivesBaseName
• KT-52646 KJS / Gradle: make “KotlinCompilationNpmResolver already closed” a warning
• KT-52647 KJS / Gradle: Make “Projects must be configuring” a warning
• KT-56158 KJS: Support implementation dependencies

Fixes

• KT-59604 Unresolved reference: useKarma in convention plugin
• KT-57604 JS, Space: Circular dependency between tasks
• KT-59116 K/JS npm dependcies are not resolved properly on Kotlin 1.9
• KT-54731 KJS / Gradle: “There are multiple versions of “kotlin” used in nodejs build: 1.6.21, 1.7.20.” with kotlin-dsl in buildSrc
• KT-58970 browserTest gradle task fails if karma is used and gradle configuration cache is enabled
• KT-59004 Kotlin JS 1.9.0-Beta, yarn.lock is unstable in multi module project
• KT-56458 KJS / Gradle: Unnecessary and confusing “There are multiple versions of “kotlin” used in nodejs build” generated from YarnImportedPackagesVersionResolver
• KT-57985 K/JS: packageJson Gradle configurations don't inherit unique attributes from JsTarget DSL
• KT-57817 JS: executables for couple of JS targets builds in the same directory
• KT-58199 K/JS: Remove useCoverage method
• KT-57116 KJS / Gradle: commonWebpackConfig not applied if called after binaries.executable()
• KT-58522 K/JS: Upgrade NPM dependency versions
• KT-57629 K/JS: Change default destination of JS production distribution
• KT-57480 K/JS: Use IR compiler by default without explicit choosing of js compiler
• KT-58345 K/JS: Webpack task skipped with ES modules because files have mjs extension
• KT-58071 KJS / Gradle: jsNodeTest task is not incremental
• KT-43809 KJS: browserProductionExecutableDistributeResources tasks deletes distributions directory
• KT-56690 Kotlin2JsCompiler friendDependencies cannot be configured through friendPaths
• KT-57920 K/JS: Make imported NPM package not considering dev dependencies
• KT-56025 KJS / Gradle: Gradle 8.0 jsBrowserProductionWebpack uses the output of another project's jsProductionExecutableCompileSync
• KT-57630 K/JS: webpack updating twice on one change of kt sources
• KT-47351 KJS / IR: :jsTestPackageJson is unable to find nested included builds under composite build
• KT-44754 K/JS: browserRun --continuous keeps rebuilding without any changes
• KT-49774 KJS / Gradle: Errors during NPM dependencies resolution in parallel build lead to unfriendly error messages like “Projects must be closed”
• KT-57387 Remove support of webpack 4
• KT-57386 Kotlin/JS upgrade npm dependencies
• KT-56705 KJS / Gradle: Module name starting with ‘@’ isn't properly set when FUS is disabled
• KT-46428 KJS / IR: Composing build failed “Failed to create MD5 hash for package.json”
• KT-53687 Don't trigger npm and yarn related tasks if it not relevant for assemble
• KT-49915 KJS / Gradle: Gradle build cache miss because of absolute path in KotlinJsIrLink.filteredArgumentsMap
• KT-56192 KJS: In browser testing no original sources in stacktrace
• KT-42395 Kotlin/JS: Gradle DSL: PackageJson.customField() does not accept null
• KT-43305 Support Node.JS downloading for Ubuntu
• KT-48631 KJS: Unconditionally uses linux/x86 binaries
• KT-38015 NodeJS installation does not extract symlinks correctly (npm and npx)

Tools. Gradle. Multiplatform

New Features

• KT-34662 Provide an option for Android targets to compile & run commonTest tests as unit tests only, instrumented tests only, or both
• KT-55881 Add possibility to enable/disable sources publication similar to Java Gradle Plugin API

Fixes

• KT-59446 MPP: transformCommonMainDependenciesMetadata failing for api java dependency in shared jvm source set with Future was not completed yet
• KT-55751 MPP / Gradle: Consumable configurations must have unique attributes
• KT-57688 MPP: compileDebugKotlinAndroid task fails with llegalArgumentException: ‘moduleName’ is null!
• KT-56210 Pass module structure to CLI of K2 if K2 enabled
• KT-57531 KotlinNativeLink: StackOverflowError when consuming library with dependency cycles (from constraints)
• KT-58281 Kotlin Gradle Plugin: Enable Kotlin/Android SourceSetLayout v2 by default
• KT-57903 Prepare for migration to the pluggable android target plugin
• KT-49933 Support Gradle Configuration caching with HMPP
• KTIJ-25644 KGP import: ‘KotlinRunConfiguration’ won't be able to infer correct runtime classpath
• KT-58661 KGP: KotlinJvmTarget: Implement ‘run’ carrier task
• KT-59055 KotlinJvmRun not respecting jvmToolchain setting
• KT-57959 Module-name value can't be changed for the android target of a multiplatform project
• KT-55506 TCS: Gradle Sync: kotlin-stdlib-common is not filtered from JVM + Android source sets
• KTIJ-25732 Flaky: KotlinMultiplatformSmokeTests .testJvmAndNative
• KTIJ-25039 New import can add unresolved dependency as empty
• KT-57652 Don't expose sourcesElements for project2project dependencies
• KT-58601 Finalise “ExternalKotlinTargetApi” shape for initial 1.9 release
• KT-58710 External Target Api: Add API to control SourceSetTree
• KT-58488 Add a diagnostic message to KGP in case of val androidTest by getting usage
• KT-57482 cleanNativeDistributionCommonization is not compatible with configuration cache with gradle 8.0
• KT-58062 Commonizer configuration cache not compatible with Gradle 8.1
• KT-58086 Warn about using MPP libraries published in the legacy mode
• KTIJ-24254 KotlinProjectArtifactDependencyResolver returning too early
• KT-56439 TCS: Gradle Sync: IdeBinaryResolver: Add componentFilter API for compilations/configurations
• KT-57023 Cryptic Gradle task descriptions for compile tasks
• KT-58470 Warning about using MPP libraries published in the legacy mode is not reported if the dependency is declared in an intermediate source set
• KT-58466 K2 Gradle: non *.kt files are passed to -Xfragment-sources
• KT-58319 kotlin.git: ProjectMetadataProviderImpl “Unexpected source set ‘commonMain’”
• KT-51940 HMPP resolves configurations during configuration
• KT-58261 Link kotlin native binary framework tasks fails when configuration cache is enabled
• KT-41506 UnknownDomainObjectException: “KotlinSourceSet with name not found” when creating custom compilations after applying withJava to an MPP JVM target
• KT-58209 Do not use the term ‘Module’ in KotlinTargetHierarchy
• KT-56153 When the dependency is unresolved, import fails and don't import anything instead of degrading gracefully
• KT-56571 New import broke apiVersion for commonMain, commonTest and jvmAndAndroidMain modules
• KTIJ-24552 TCS: KotlinMppGradleProjectResolverExtension: Add ‘afterProjectResolved’ API
• KTIJ-24368 Multiplatform;Composite Builds: prepareKotlinIdeaImport not executed on included builds
• KTIJ-24377 Multiplatform;Composite Builds: Unresolved symbols from a root project of included build
• KT-56712 Multiplatform;Composite Builds: Classpath isolation: .MppDependencyProjectStructureMetadataExtractorFactory cannot be cast to class *MppDependencyProjectStructureMetadataExtractorFactory
• KT-56461 MPP: resolvableMetadataConfiguration: Ensure consistent resolution across all compile dependencies
• KT-56841 MPP: Module-to-module dependencies don't work inside included build in included build
• KT-42748 Project that transitively depends on composite build of multimodule multiplatform library cannot resolve dependencies properly
• KT-52356 MPP / Gradle: Missing common classes on KMM project integrated via Gradle included build into an Android application
• KT-51293 Unresolved references with hierarchical project structure when building KotlinMetadata from native-common source set
• KTIJ-24771 Multiplatform: Composite builds do not resolve in IDEA when rootProject.name != buildIdentifier.name
• KT-56700 V2 MPP Source Set layout warnings should include link to docs
• KT-55926 TCS: Gradle Sync: Import Extras on KotlinSourceSet and KotlinTarget
• KTIJ-24364 KotlinProjectArtifactDependencyResolver: Extend API to include information about ‘requesting source set’
• KTIJ-24365 KotlinMPPGradleProjectResolver: Create extension points for other plugins (Android)
• KT-55730 MPP / Gradle: compileKotlinMetadata fails to resolve symbols in additional source sets

Tools. Gradle. Native

• KT-58838 KGP/Multiplatform: 1.9.0-Beta with custom cinterops: IllegalStateException: Could not create domain object ‘jni’ (DefaultCInteropSettings)
• KT-57823 KotlinNativeCompileOptions.moduleName value is ignored and replaced with the default one if to set up using compilations
• KT-57815 KotlinNativeCompileOptions.moduleName isn't accessible if to configure using compilerOptions.configure {}
• KT-57944 K2: K2, MPP, Native: K2 reports “Source does not belong to any module” for native sources
• KT-53108 Expose Kotlin/Native compiler options as Gradle DSL
• KT-58063 Kotlin/Native tasks configuration cache are not compatible with Gradle 8.1
• KT-38317 Kotlin/Native: NSURLConnection HTTPS requests fail in iOS tests due to --standalone simctl flag
• KT-56280 Gradle: freeCompilerArgs are no longer propagated from compilations to Native binaries

Tools. Incremental Compile

• KT-58289 IC fails to detect a change to class annotations
• KT-58986 New IC: ISE “The following LookupSymbols are not yet converted to ProgramSymbols: LookupSymbol(name=$$delegatedProperties, ...)”
• KT-56197 If use classpathSnapshot, the invoke place of subclass's super function who has default parameters will not recompiled if it is incremental build
• KT-56886 K2: Changes to Java sources used in Kotlin project do not trigger a rebuild if a previous build was successful

Tools. JPS

• KTIJ-25384 JPS plugin: serialization plugin is not applied to modules
• KT-56438 Add minimal statistic report for JPS build
• KT-58314 kotlin-build-statistics is missing for kotlin-jps-plugin
• KT-55696 JPS IC K2 - fix new failing tests with Java interop
• KT-57102 SCE: DefaultErrorMessages$Extension: DefaultErrorMessagesWasm not a subtype after adding WASM error messages

Tools. Kapt

• KT-54468 KAPT Gradle plugin causes eager task creation
• KT-59521 Kapt maven plugin require version of annotation processor
• KT-58301 K2: Compile Kotlin task failure for the generated by Kapt sources : 'Source NameOfTheGenerated.kt does not belong to any module
• KT-57598 K2: Support a fallback mode executing Kapt with K1 even when the compiler is run with languageVersion=2.0
• KT-58226 KAPT: “org.jetbrains.kotlin.psi2ir.generators.ErrorExpressionException: null: KtNameReferenceExpression” with enum with secondary constructor

Tools. Maven

• KTIJ-25445 Maven. JVM target is imported as 1.6 when no target specified in pom.xml

Tools. Parcelize

• KT-59112 K2: “IllegalStateException: Function has no body with @Parcelize” on nested sealed class hierarchies

Tools. Scripts

• KT-58366 The obsolete kotlin-script-util jar is still published and contains broken JSR-223 implementation

Tools. Wasm

• KT-56585 Change wasmBrowserRun Browser Executable to System Default
• KT-56159 Running (karma) tests doesn't work in a project generated by wizard “Browser Application for Kotlin/Wasm”
• KT-57203 Update Kotlin/Wasm to support Gradle 8

1.9.0-RC

Backend. Wasm

• KT-58188 Restore binary compatibility of PlatformDiagnosticSuppressor.shouldReportUnusedParameter
• KT-58293 Wasm: ReferenceError: e is not defined in kotlin.test.jsThrow
• KT-58931 Wasm tests are failing to start on Kotlin 1.9.0-Beta

Compiler

Fixes

• KT-58621 K2: Private class shadows public function defined in the same package
• KT-59102 K2: constant evaluator does not provide Long type on shl
• KT-59079 “AE: SyntheticAccessorLowering should not attempt to modify other files!” with callable reference to constructor with value class parameter
• KT-58787 KAPT: “NullPointerException: null cannot be cast to non-null type” with delegate
• KT-58837 Partial linkage fails to report any compiler message on Windows when launched through Gradle plugin
• KT-59030 [PL] Workaround for broken @Deprecated annotations in c-interop KLIBs
• KT-58618 K2: Local property delegates cannot infer generic return type
• KT-58897 K2: False positive unresolved reference with same-named enum class and its entry
• KT-56927 Enum with secondary constructor can't be compiled with K2 using JS/Native backend
• KT-57570 Remove source code excerpts from platform type nullability assertion exceptions
• KT-52774 Resolve unqualified enum constants based on expected type

IDE. Gradle Integration

• KT-59034 MPP build failed with “Factory type is not known for plugin variants” in kt-231-*

JavaScript

• KT-58570 KJS: ES6 classes + PL throw java.lang.NullPointerException
• KT-58835 K2/JS: Fix incremental compilation klib tests
• KT-58794 KJS / K2: Assertion failed with Space build

Libraries

• KT-58985 Update KClass.isData KDoc
• KT-58276 Deprecate redundant public declarations in kotlin.native.concurrent

Native. ObjC Export

• KT-58839 K/N: Exception during HiddenFromObjC marked class extension function compiling

Tools. Compiler plugins. Serialization

• KT-58918 Serialization: NPE at run time obtaining a serializer for a sealed class with a generic self-referencing property
• KT-58954 Serialization: NPE at run time when accessing a delegating property of a deserialized object
• KT-59113 Serialization: NPE at run time when accessing a delegating property of a deserialized object
• KT-57647 Serialization: “IllegalAccessError: Update to static final field” caused by serializable value class

Tools. Gradle

• KT-59256 [1.9.0-Beta] ServiceLoader does not pick up classes defined in the same project
• KT-58662 Gradle 8.1 + Configuration Cache: custom values data is missing from build report
• KT-59063 Explicit API mode broken in Kotlin 1.9.0-Beta
• KT-59191 Actual compilation failure exception might be hidden in the case of a Kotlin daemon crash
• KT-59056 FreeCompilerArgs options added using ‘subprojects’ extension override module-level freeCompilerArgs options
• KT-55740 Gradle 8: Listener registration using Gradle.addBuildListener() has been deprecated
• KT-58251 Build Statistics. Kotlin-specific tags are missing in build scans if projects use Gradle 8+
• KT-58916 [1.9.0-Beta] PLUGIN_CLASSPATH_CONFIGURATION_NAME and NATIVE_COMPILER_PLUGIN_CLASSPATH_CONFIGURATION_NAME should stay public or offer an alternative API
• KT-58869 K2, Gradle: Improve message “100% (2/2) tasks have compiled with Kotlin 2”

Tools. Gradle. JS

• KT-59116 K/JS npm dependcies are not resolved properly on Kotlin 1.9
• KT-58970 browserTest gradle task fails if karma is used and gradle configuration cache is enabled
• KT-59004 Kotlin JS 1.9.0-Beta, yarn.lock is unstable in multi module project

Tools. Gradle. Multiplatform

• KT-57903 Prepare for migration to the pluggable android target plugin
• KT-58661 KGP: KotlinJvmTarget: Implement ‘run’ carrier task
• KT-59055 KotlinJvmRun not respecting jvmToolchain setting

Tools. Gradle. Native

• KT-57823 KotlinNativeCompileOptions.moduleName value is ignored and replaced with the default one if to set up using compilations
• KT-58838 KGP/Multiplatform: 1.9.0-Beta with custom cinterops: IllegalStateException: Could not create domain object ‘jni’ (DefaultCInteropSettings)

Tools. Incremental Compile

• KT-58986 New IC: ISE “The following LookupSymbols are not yet converted to ProgramSymbols: LookupSymbol(name=$$delegatedProperties, ...)”

Tools. Parcelize

• KT-59112 K2: “IllegalStateException: Function has no body with @Parcelize” on nested sealed class hierarchies

1.9.0-Beta

Analysis API

New Features

• KT-57930 Analysis API: provide an API for extending Kotlin resolution
• KT-57636 K2: Add the return type of K2 reference shortener AA ShortenCommand::invokeShortening() e.g., ShorteningResultInfo to allow callers to access the shortening result PSI

Fixes

• KT-55626 Impossible to restore symbol by psi from script file
• KT-57314 LL FIR: Combine LLFirProvider$SymbolProviders in session dependencies (optimization)
• KT-55527 K2 IDE: Rewrite KtScopeContext class to allow to handle each scope separately
• KT-55329 LL FIR: Unexpected ACTUAL_WITHOUT_EXPECT error on constructor and function declaration
• KT-50732 LL API: fix compiler based tests
• KT-57850 K2: contract violation due to SymbolLightAccessorMethod.propertyAccessorSymbol
• KT-56543 LL FIR: rework lazy transformers so transformers modify only declarations they suppose to
• KT-56721 K2: FirExtensionDeclarationsSymbolProvider: java.lang.IllegalStateException: Recursive update
• KT-50253 Analysis API: Solve issues with ProcessCancelledException
• KT-56800 K2 IDE: optimize deprecation calculation for symbols
• KT-55006 Analysis API does not transform Java type refs for callable symbol return types
• KT-57256 AA FIR: Reduce lazy resolve phase for deprecation status
• KT-58141 K2: AA FIR: impossible to restore symbol for declaration with annotation with argument inside type
• KT-57462 Symbol Light Classes: SymbolLightFieldForProperty should retrieve annotations not from KtPropertySymbol, but from the corresponding backing field
• KT-58249 Analysis API: Disable error logging for FE10 implementation of resolveCall when resolve is not successful
• KT-54864 Analysis API: add function to get expect KtSymbol list by actual KtSymbol
• KT-56763 Analysis API: .KtSourceModuleImpl is missing in the map. on symbol restore when symbol cannot be seen from the use-site module
• KT-56617 Analysis API: optimize KtFirSymbolProviderByJavaPsi.getNamedClassSymbol
• KT-54430 K2: .getAllOverriddenSymbols() returns invalid results

Backend. Native. Debug

• KT-55440 Kotlin/Native debugger: inline function parameters are not visible during debugging

Backend. Wasm

• KT-57136 K/Wasm: Restrict non-external types in JS interop
• KT-57060 Clarify the lack of support for dynamic in Kotlin/Wasm
• KT-56955 K/Wasm: Support restricted version of K/JS js(code)
• KT-57276 Wasm: “Body not found for function” error when compiling konform library with Kotlin/Wasm support
• KT-56976 K/Wasm bug with calling override of external function with default parameters
• KT-56584 K/Wasm: Can't link symbol class

Compiler

New Features

• KT-49276 Warn about potential overload resolution change if Range/Progression starts implementing Collection
• KT-55333 Allow secondary constructors in value classes with bodies
• KT-54944 @Volatile support in native
• KT-54746 Deprecate with ERROR JvmDefault annotation and old -Xjvm-default modes
• KT-29378 K2: rework warnings/errors for equality/identity operators on incompatible types
• KT-57010 Kotlin/Native: make it possible to compile bitcode in a separate compiler invocation
• KT-55691 K2: Avoid inferring Nothing? in presence of other constraints (beside type parameter bounds)
• KT-46288 Unexpected behavior of extension function on lambda with suspend receiver
• KT-24779 Inconsistent smart cast behavior for bound data flow values

Performance Improvements

• KT-56906 FIR: Use cached instance of FirImplicitTypeRefImpl in FIR builders
• KT-56276 LanguageVersion.getVersionString() allocates 5k objects on project opening

Fixes

• KT-56609 K2: False positive NULL_FOR_NONNULL_TYPE with -Xjsr305=strict and @Nullable annotation Java parameter
• KT-56656 K1/K2: inconsistent NOTHING_TO_OVERRIDE with complex nullable annotations
• KT-58332 K2: local fun with suspend type is not marked as suspend in IR
• KT-57991 K2: Modifier ‘suspend’ is not applicable to ‘anonymous function’
• KT-4113 No smartcast for nullable lambda property (functional type) with implicit/operator invoke call
• KT-54294 K2: “Not all type variables found” in builder inference with type parameters inferred through a union of two branches
• KT-52597 Provide Alpha Support for Multiplatform in the K2 platform
• KT-58523 K2: reference is resolved to imported type-alias instead of identically named top-level property
• KT-57098 Native: avoid object initialization while accessing const val
• KT-57973 32-th default value in inline classes override function is not used
• KT-57714 “IllegalStateException: <B::!>” using reified generics
• KT-57810 toString of object erroneously considered as constant function in string concatenation
• KT-58076 K2: Incorrect inference of type of labeled receiver
• KT-57929 K2: Arguments of annotations are not calculated in a lot of strange locations
• KT-55388 Consider enabling ProhibitUsingNullableTypeParameterAgainstNotNullAnnotated
• KT-53041 NPE in Kotlin 1.7.0 when using RxJava Maybe.doOnEvent with anonymous parameters
• KT-54829 Cleanup local types approximation logic
• KT-38871 Kotlin Gradle DSL, MPP: UNUSED_VARIABLE when configuring a sourceset with delegated property
• KT-58587 MUST_BE_INITIALIZED must take into account effectivelly final
• KT-58524 K2: false-positive overload resolution ambiguity error on invoking a generic class's member function with id-shaped function-typed parameter on intersection-typed receiver
• KT-53929 Enum.entries: consider changing scope behavior in K1
• KT-58520 K2: FIR2IR: ISE during const evaluation of operator times with exposed
• KT-56662 K1: false negative INVISIBLE_SETTER for a var with internal setter accessed from a derived class
• KT-57770 K2: Support generation of serializer if base class for serializable class declared in different module
• KT-58375 Kapt: “wrong number of type arguments. required 1” when more than 22 type arguments
• KT-56077 K2: build atomicfu
• KT-56074 K2: build Space JVM (snapshot 2022.3)
• KT-48870 [FIR] Different behavior for explicit receiver resolution inside delegated constructors
• KT-53865 Partial linkage: overriding function with parameter losing vararg: Native is successful, JS fails in runtime
• KT-53568 Partial linkage: absent class as type parameter bound causes failure of compileProductionExecutableKotlinJs
• KT-53608 Partial linkage: Kotlin/JS fails with IllegalStateException: “Validation failed in file” when overridden declaration was visible, but now private
• KT-53663 Partial linkage: usage of property which becomes abstract: no IrLinkageError, but AssertionError in Native backend instead
• KT-53938 Partial linkage: with turning interface into class and using as second parent Native build fails
• KT-53939 Partial linkage: with turning object into class linkNative and jsTest tasks fail
• KT-53941 Partial linkage: with turning class into object accessing member via parameterless constructor does not fail
• KT-53970 Partial linkage: on turning nested class into inner JS tasks are successful, Native build fails
• KT-53972 Partial linkage: turning inner class into nested: with usage in executable Native fails with NPE in backend
• KT-53971 Partial linkage: turning inner class into nested: without usage in executable Native is successful, JavaScript fails
• KT-53995 Partial linkage: on turning class to abstract and direct constructor call Naive fails, JavaScript is successful
• KT-58013 K2: “Not enough information to infer type variable T” when using assert non-null (!!) and delegation
• KT-54045 Partial linkage: turning class into type alias + calculating implicit function type: build fails with UninitializedPropertyAccessException: “lateinit property parent has not been initialized”
• KT-54046 Partial linkage: turning type alias into class + using it as type: build fails with AssertionError: “Expected exactly one delegating constructor call but none encountered”
• KT-53887 Partial linkage: turning from enum to regular class + reference to enum contant causes compileProductionExecutableKotlinJs fail with IllegalStateException
• KT-54047 Partial linkage: reference to removed enum const causes JS fail with “IllegalStateException: Validation failed in file”
• KT-54048 Partial linkage: reference to removed enum const in runtime causes Native fail with IllegalStateException at IrBindablePublicSymbolBase.getOwner()
• KT-57784 “NullPointerException: Parameter specified as non-null is null:” with enum, companion object, ‘entries’ and map
• KT-58365 K2: Fix stub types leakage in builder inference caused by implicit receiver type update with partially resolved calls (IGNORE_LEAKED_INTERNAL_TYPES for stub types)
• KT-58214 Continuation parameter only exists in lowered suspend functions, but function origin is LOCAL_FUNCTION_FOR_LAMBDA
• KT-58135 K2: Priority of extension property is lower than ordinary property
• KT-57181 [K1/N, K2/N] Expect and Actual funs have different IdSignature.CommonSignature, if Expect has default argument
• KT-56023 Constant operations (e.g. division) are not constant in K2 (JS, Native)
• KT-57354 In suspend function default arguments are sometimes not deleted in IR
• KT-55242 K2/MPP: basic build/link functionality
• KT-57979 K2: Unresolved reference error when assigning to Java synthetic property with a different nullability getter
• KT-58142 K2: val parameter with more specific type is lower priority
• KT-54518 False negative NON_PUBLIC_CALL_FROM_PUBLIC_INLINE when calling internal method of super class
• KT-58025 K2: Argument type mismatch when using Springs HandlerMethodArgumentResolver
• KT-57373 K2: FIR properties synthesized when implementing interface by delegation don't have accessors
• KT-58259 Unexpected unresolved function call with obvious invoke-convention desugaring
• KT-57135 K2: Fir should take into account an annotation's allowed targets as well as the use-site target when deciding whether it applies to a property, a field, or a constructor parameter
• KT-57958 K2: Initializer type mismatch when using extension property on type with star projection
• KT-58149 K2: New inference error with buildList
• KT-58008 K2: “Cannot find cached type parameter by FIR symbol: T” on suspend function with generic and nested class
• KT-57835 K2: compiler crash on lambda with dynamic receiver
• KT-56500 The type parameter TYPE_PARAMETER name:E index:0 variance: superTypes:[kotlin.Any?] reified:false is not defined in the referenced function FUN LOCAL_FUNCTION_FOR_LAMBDA
• KT-58143 K2: overload resolution ambiguity inside dynamic lambda
• KT-58132 K2: Implicit int constant to long converion crashes FirSerializer
• KT-57378 Partial linkage: Run codegen box tests for Native & JS with enabled PL
• KT-58207 K2: Handle result of completion of synthetic call with callable reference argument
• KT-56549 K2: Reference to Java sealed class fails to compile
• KT-57994 K2: Type inference failed on function reference
• KT-58099 interop0 test fails with error “type kotlin.String? is not supported here: doesn't correspond to any C type”
• KT-57671 Synthetic $EntriesMappings declaration is public and generated even for enums from current module on IC
• KT-56517 K2: Reference to Java record fails to compile: “unresolved reference”, “Overload resolution ambiguity between candidates”
• KT-58163 FIR: deserialized default property setter and getter must have FirResolvePhase.ANALYZED_DEPENDENCIES phase
• KT-55646 K2: Report definitely non-nullable as reified error
• KT-56442 K2: Make sure K2 has the same behavior for defaults with overrides as K1 has
• KT-55904 Fix tests for volatile annotation on K2
• KT-57928 K2: Arguments of annotations on constructor value parameter are not calculated
• KT-57814 K2: Argument type mismatch with delegating property
• KT-56490 Implement deprecation for an anonymous type exposed from inline functions with type argument
• KT-57962 K2: No set method providing array access on dynamic
• KT-57353 K2: unresolved reference when using fully qualified object declaration name as an expression, when a declaration package is from another klib and has at least two name segments
• KT-57988 K2: compiler exception on get operator on dynamic this
• KT-57960 K2: incorrect type inference in lambda with dynamic receiver
• KT-56511 K1: false negative SMARTCAST_IMPOSSIBLE when alien constructor property is accessed from a private class
• KT-55079 Refactor DiagnosticReporterByTrackingStrategy and fix some “diagnostic into black hole” problems
• KT-57961 K2: Unresolved reference using dynamic lambda parameter
• KT-57880 K2: false-positive argument type mismatch due to lambda receiver shadowing labeled outer lambda receiver when assigning lambda to variable
• KT-57947 K2: Incorrect resolution results when property type for invokeExtension is not inferred
• KT-56687 Unexpected behaviour with enum entries when using outdated stdlib
• KT-57806 K2: string interpolation as annotation parameter causes error
• KT-57611 K2: Annotation arguments are not evaluated
• KT-56190 [K2/N] Const initializers are not serialized to klib
• KT-57843 K2: Missing diagnostic when calling constructor through typealias whose expansion has a deprecation
• KT-57350 FIR: deprecation diagnostic is not reported on a super class call
• KT-57769 [K2] Load properties in proper order for classes compiled with kotlinx.serialization and LV < 2.0
• KT-56258 VerifyError: Bad local variable type when using -Xdebug
• KT-57839 K2: Compiler crash on lambda returning anonymous object with implemented lambda
• KT-57822 K2: Can't refer to external interface from class literal
• KT-57809 K2: No value passed for parameter of external class
• KT-56383 Build intellij master with LV 1.9
• KT-55056 Builder inference causes incorrect type inference result in related call
• KT-30905 Expect var property with default public setter matches with actual var property with private setter
• KT-56030 [K2/N] Support Objective-C overloading by param names only
• KT-57665 K2: incorrect resolution of dynamic type
• KT-57763 FirExtensionRegistrar extension point broken
• KT-40903 Forbid actual member in expect class
• KT-56965 K/N: linkDebugFrameworkIosArm64 tasks failing with UnsupportedOperationException: VAR name:disposables type:com.badoo.reaktive.disposable.CompositeDisposable [val]
• KT-57768 Don't decompile code to search for annotation arguments
• KT-55628 Diagnostics for kotlin.concurrent.Volatile annotation applicability
• KT-56815 compileKotlin task is stuck with while(true) and suspend function
• KT-55860 K2. [CONFLICTING_INHERITED_MEMBERS] for inheritor of a class with overloaded generic function
• KT-55316 K2. IllegalStateException on incorrect import directive name
• KT-55804 K2: UNSAFE_CALL Non-nullable generic marked as nullable even if non-null asserted
• KT-55405 K2: false-negative INVISIBLE_REFERENCE in import directives
• KT-54781 K2: no error on unresolved import statement with more than one package
• KT-55902 K2: Support ImplicitIntegerCoercion annotation
• KT-56577 Migrate Native KLIB ABI compatibility tests to K2
• KT-56603 [K2/N] Segfault invoking fun from binary compatible klib
• KT-54894 K2: False positive RETURN_TYPE_MISMATCH on function which returns a functional type with @UnsafeVariance argument
• KT-57602 K2: Rework member scope of types having projection arguments for covariant parameters
• KT-50550 False positive NO_ELSE_IN_WHEN with annotated when branch condition
• KT-57431 K2 MPP JS: Compiler crash on transitive common dependencies
• KT-57510 K2: Data class equals/hashCode/toString methods are not written to Klib metadata
• KT-56336 [K2/N] Multiplatform test fails with unexpected “actual declaration has no corresponding expected declaration” compiler error
• KT-57556 K2: Rename error ‘This API is not available after FIR’
• KT-56583 K1: Implement opt-in for integer cinterop conversions
• KT-23447 Integer.toChar compiles to missing method
• KT-46465 Deprecate and make open Number.toChar()
• KT-56119 BinaryVersion.isCompatible binary compatibility is broken
• KT-56527 K2: “AssertionError: Assertion failed” during compilation in SequentialFilePositionFinder
• KT-55469 [K2/N] equals(Double,Double) and equals(Boolean,Boolean) are not found
• KT-55055 K1: Builder inference violates upper bound
• KT-57316 Initialize Enum.entries eagerly: avoid using invokedynamics
• KT-57491 Kotlin synthetic parameter looks ordinary
• KT-56747 [K2/N] Return type for lambda: (Any) -> Any which returns Unit is different for K1 and K2 and return statement is missing with K2
• KT-57211 K2: incorrect “error: an annotation argument must be a compile-time constant” on unsigned array in annotation argument
• KT-57424 K2 IDE: “By now the annotations argument mapping should have been resolved” exception
• KT-56171 Implement deprecation warning for missing PRIVATE_CLASS_MEMBER_FROM_INLINE error
• KT-57241 K2 MPP: Actualization doesn't work for actual enum that has primary constructor with arguments
• KT-57210 K2 MPP: Support of arguments with dynamic type
• KT-57182 K2 MPP: Actualization doesn't work for nested objects
• KT-56344 K2: Implement correct errors reporting of IrActualizer
• KT-54405 K2 compiler allows val redeclaration
• KT-54531 [K2] Uncaught Runtime exception is thrown instead of user friendly error messages with details in case -no-jdk option set to true
• KT-57131 K2: stdlib test compilation fails on ListTest.kt in FirJvmMangleComputer
• KT-56913 K2: Incorrect line numbers in overriden field getters and setters
• KT-56982 K2: Incorrect line number start in when expression
• KT-56720 K2: false positive MANY_IMPL_MEMBER_NOT_IMPLEMENTED in case of delegation in diamond inheritance
• KT-57198 K2: false-positive type mismatch error on inherited raw-typed class with type parameters in upper bounds of other type parameters
• KT-15470 Inconsistency: use-site ‘set’ target is a compilation error, use-site ‘get’ target is ok
• KT-57405 K2. Function call ambiguity error when nullable String is passed to function with Spring @Nullable annotation in signature
• KT-57242 Equals behaviour for value classes implementing interfaces is different between 1.8.10 and 1.8.20-RC
• KT-57261 “IllegalArgumentException was thrown at: MemoizedInlineClassReplacements.getSpecializedEqualsMethod” when comparing non-inline class instance with an inline class instance
• KT-27261 Contracts for infix functions don't work (for receivers and parameters)
• KT-57036 Unresolved reference: with inferred type of class constructor with extension parameter
• KT-56177 K2: FIR should not generate annotation on both property and parameter
• KT-54990 NI: Type mismatch when encountering bounded type parameter and projections
• KT-57107 Handling of Windows line endings CRLF broken in latest snapshot with K2
• KT-57117 K2: Compiler reports invalid columns in diagnostics in case of crlf line endings
• KT-55828 [K2/N]: Fix test fails in OPT mode : Internal compiler error: no implementation found ... when building itable/vtable
• KT-56169 False negative deprecation warning about future inference error with builder inference
• KT-56657 K1/K2: inconsistent behavior in nullability mismatch (Guava hash set/map)
• KT-56379 K2: build tests for the Kotlin standard library
• KT-56079 K2: build YouTrack 2022.3
• KT-56696 K2: Allow to access uninitialized member properties in non-inPlace lambdas in class initialization
• KT-56630 FIR: ClassCastException on compilation hierarchy with a raw type
• KT-57171 K2: Implement bytecode tests
• KT-56814 K2. PsiElement is null inside IrClass. As a result ClassBuilder defineClass gets null as origin
• KT-54758 Deprecate ClassBuilderInterceptorExtension.interceptClassBuilderFactory and provide another method without dependency on K1
• KT-57253 K2: clean up callable reference logic in FIR2IR
• KT-56225 K2. “BackendException: Backend Internal error: Exception during IR lowering” error on incorrect constructor in inline class
• KT-56769 K2. Annotation applicability is ignored during compilation when there's use-site @target
• KT-56616 K2: cannot infer Java array type properly
• KT-56506 K1/K2 inconsistency: VAL_REASSIGNMENT on synthetic setter with different nullability
• KT-56665 K2: false positive RECURSIVE_TYPEALIAS_EXPANSION
• KT-53966 K2 does not support SAM conversions with condition into Java/Kotlin functional interfaces
• KT-56013 K2. a set of errors about local properties are missing
• KT-56771 FIR: Increment operator on qualified expressions leads to exception from resolve
• KT-56548 K2: false positive overload resolution ambiguity for Java record constructor
• KT-56476 K2: false positive NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY at inline fun use-site
• KT-56138 K2: Illegal conversion of lambda with parameters to ExtensionFunction expected type
• KT-55966 K2: Not enough information to infer type variable K if smartcast is used
• KT-55423 K2: Implement CONTRACT_NOT_ALLOWED
• KT-53846 K2 / Context receivers: ClassCastException on secondary constructor of class with context receiver
• KT-57029 Per-file caches fail on local inline function in an inline function
• KT-57033 Make KtClassLiteralExpression stub based
• KT-57035 Make KtCollectionLiteralExpression stub based
• KT-40857 Invalid parameterized types for extension function on parameterized receiver when javaParameters=true
• KT-56154 Compiler backend crash on reference to Java synthetic property from generic class
• KT-55879 Modularized tests: fir.bench.language.version is used as API version, not language version
• KT-55886 K2: Wrong code location mapping with Windows line endings
• KT-51821 ClassCastException on anonymous fun interface implementation when unrelated vararg is used
• KT-57053 Problem around anonymous objects in inline functions
• KT-56579 [K2/N] IR actualizer crashed with K2 on expect annotation marked with @OptionalExpectation, without actual.
• KT-56750 K2: “IllegalArgumentException: No argument for parameter VALUE_PARAMETER” when calling typealias method reference
• KT-55614 K2: consider serializing static enum members (values/valueOf/entries) to match K1 behavior
• KT-30507 Unsound smartcast if null assignment inside index place and plusAssign/minusAssign is used
• KT-56646 K2: “IllegalStateException: No single implementation found for: FUN FAKE_OVERRIDE” when compiling a functional interface
• KT-56514 K2 should report ACTUAL_TYPE_ALIAS_NOT_TO_CLASS
• KT-56522 K2 should report ACTUAL_FUNCTION_WITH_DEFAULT_ARGUMENTS
• KT-56542 K2: false positive TOO_MANY_ARGUMENTS in VarHandle.set call
• KT-56861 FIR: test FirPluginBlackBoxCodegenTestGenerated.testClassWithAllPropertiesConstructor is failing with runtime error
• KT-56234 K2: “ISE: Expected value generated with NEW” with inline property setter and noinline parameter
• KT-56722 K2: cannot resolve component call after smart cast
• KT-56714 K2: wrong argument mapping in DSL
• KT-56723 K2: lambda accidentally returns Unit? instead of Unit
• KT-56847 Unresolved reference to Java annotation in Kotlin class with the same name packages
• KT-55877 K2: Secondary constructor without call to parent: no frontend error, ISE: “Null argument in ExpressionCodegen for parameter VALUE_PARAMETER”
• KT-56386 K2: Make possible to access Java field which is shadowed by Kotlin invisible property`
• KT-56862 Compatibility problem with using Kotlin in Intellij 223 or higher because of missing particular trove4j dependency
• KT-55088 JS, Native compilation fail with internal error on SomeEnum.entries reference when SomeEnum is from klib compiled with disabled EnumEntries language feature
• KT-40904 No warning when declare actual in the same target (module) as expect
• KT-56707 K2: Unexpected TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM where only getter type specified explicitly
• KT-56508 Context receivers: Internal compiler error when compiling code containing a class with a secondary constructor
• KT-56505 K2: Missing NO_EXPLICIT_VISIBILITY_IN_API_MODE errors on various declarations
• KT-56215 JVM: Object extension function nullable receiver null check false negative when object is null
• KT-56188 K/N: AssertionError when casting SAM wrapper with generic type parameter
• KT-56033 Restore ‘isMostPreciseContravariantArgument’ function signature for compatibility
• KT-56612 K2: false positive NO_TYPE_ARGUMENTS_ON_RHS on raw cast with type alias based argument
• KT-56701 K2 (with LightTree) reports syntax errors without additional information
• KT-56649 K2 uses 0-index for line numbers rather than 1-index
• KT-56445 K2: False-positive unresolved reference to callable reference to function with default argument
• KT-55024 K2: overload resolution ambiguity/unresolved reference if variable is smart-casted to an invisible internal class
• KT-55722 K2: Incorrect OVERLOAD_RESOLUTION_AMBIGUITY with smart cast on dispatch receiver (simple)
• KT-56563 Inference within if stops working when changing expected type from Any to a different type
• KT-55936 K2: Support proper resolution of callable references as last statements in lambda
• KT-45989 FIR: wrong callable reference type inferred
• KT-55217 Appendable::append reference resolve inconsistencies
• KT-55169 K2: False-negative NO_ELSE_IN_WHEN
• KT-55932 K2. No compiler error when elvis operator returns not matched type
• KT-53987 K2: False negative “TYPE_MISMATCH” with if statement return
• KT-55436 K1: implement warning about shadowing of the derived property by the base class field
• KT-56521 Static scope initializers sometimes not called when first accessed from interop
• KT-41038 NI: TYPE_MISMATCH when passing constructor of nested class
• KT-42449 Can not resolve property for value of type Any even after casting type to a type with star projection
• KT-52934 StackOverflow from PseudocodeTraverserKt.collectDataFromSubgraph with if inside finally
• KT-52860 StackOverflowError when casting involving recursive generics and star projection
• KT-52424 ClassCastException: Wrong smartcast to Nothing? with if-else in nullable lambda parameter
• KT-52262 TYPE_MISMATCH: Nonnull smartcasting fails with non-exhaustive when
• KT-51045 SETTER_PROJECTED_OUT: Star projected nullable property can't be set to null
• KT-40480 [FIR] Support hasStableParameterName from metadata
• KT-50134 NI: Type inference regression in java streams groupingBy
• KT-50160 False positive “USELESS_CAST” caused by indexed access operator
• KT-42715 Unable to use implicit lambda param it for overloaded methods
• KT-49045 False positive USELESS_CAST in generic type with nullable type parameter
• KT-49024 AssertionError: Variance conflict: type parameter variance ‘out’ and projection kind ‘in’ cannot be combined
• KT-48975 Type mismatch: inferred type is X but Nothing! was expected with the AssertJ latest version
• KT-47870 INVISIBLE_MEMBER: Kotlin class can't access protected annotation defined in Java parent class
• KT-47495 ReenteringLazyValueComputationException on invalid code
• KT-47490 Missed diagnostic for incorrect callable reference in finally
• KT-47484 “Recursion detected in a lazy value under LockBasedStorageManager” on invalid code
• KT-46301 Combining branches with sealed interfaces in when breaks type inference
• KT-44392 False negative: redundant nullability/not null check on cast with as operator
• KT-43936 Recursion detected on input: ANNOTATION_ENTRY with annotation on star-imported nested class
• KT-43846 No smart cast when returning function closures with captured smart-cast variable
• KT-43603 False positive USELESS_CAST leads to TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM on “when” with smart cast and extension property
• KT-43553 JVM / IR: “AssertionError: Unbound symbols not allowed” caused by annotation class with TYPE target
• KT-42169 False negative CAST_NEVER_SUCCEEDS for incompatible types with generic parameter and star projection
• KT-42136 NI: False positive [USELESS_CAST] when list serves to create a mutable list
• KT-41721 SAM conversion fails on varargs with type approximated to Nothing
• KT-38288 Unresolved reference for type parameter upper bound of nested class when outer class extends it with star projected type argument
• KT-37490 NULL_FOR_NONNULL_TYPE: “Null can not be a value of a non-null type Nothing” when null is passed to nullable argument of type projected method
• KT-37365 NPE from ReflectionReferencesGenerator.generateCallableReference with inner class function reference and wrong parenthesis
• KT-36958 NI: missed unresolved on parenthesized callable reference passing through call (back-ends throw an exception)
• KT-30756 No smartcast if elvis operator as a smartcast source in while or do-while is used as the last statement
• KT-24737 Report an error on invalid this-expression with angle brackets on left-hand side of a callable reference
• KT-21463 Compiler doesn't take into accout a type parameter upper bound if a corresponding type argument is in projection
• KT-6822 Smart cast doesn't work inside local returned expression in lambda
• KT-56073 K2: build Exposed
• KT-55840 Inconsistency between members of enums in bytecode between FE 1.0 + JVM IR and FIR + JVM IR
• KT-47815 JVM: “Recursion detected in a lazy value under LockBasedStorageManager” when trying to inherit interface from a class with non-trivial function
• KT-17817 No error reported on invalid LHS for class literal
• KT-47373 Missed diagnostics on/after non-null assertion (!!) on generic class class use with class literal
• KT-51143 Wrong Unit-requiring at if/when branch with stub types
• KT-53671 False-positive diagnostic reported on OptIn annotation import from root package
• KT-53494 Mistaken type inference in compound ‘if’ expression with nullability check and covariant type
• KT-28668 “AssertionError: Unrelated types in SAM conversion for index variable” if lambda argument of ‘[...]’ in LHS of augmented assignment is used as an implementation for different SAM interfaces
• KT-55931 Inference for callable reference inside synthetic calls for if/when/try/etc stops working when brought into lambda for a call
• KT-20223 Inline access check ignores operator calls to invoke()
• KT-54478 @NoInfer causes CONFLICTING_OVERLOADS
• KT-56472 K2: Add stack of all FIR elements to CheckerContext
• KT-41126 [FIR] Inconsistency of a compiler behaviour at init block for an enum entry with and without a qualifier name
• KT-54931 Annotations defined in nested classes cannot be instantiated directly
• KT-24901 No smart cast for when with early return
• KT-7389 No intersection type for type parameter with multiple upper bounds in star projection
• KT-53086 “Cannot access ‘’ before superclass constructor has been called” with inner class secondary constructor
• KT-55137 Callable references with conversion are incorrectly allowed to be promoted to KFunction
• KT-30497 EXACTLY_ONCE contract doesn't work in a function with vararg parameter
• KT-47074 Front-end Internal error: Failed to analyze declaration State / java.lang.IllegalStateException: Should not be called! when try to add Parcelize
• KT-24503 Return-as-expression is allowed as this/super constructor parameter
• KT-55379 False positive NO_ELSE_IN_WHEN with smartcast to Boolean
• KT-47750 False positive NO_ELSE_IN_WHEN in presence of smartcast to sealed interface
• KT-53819 False positive UNINITIALIZED_VARIABLE with secondary constructor and custom property getter in local class
• KT-56457 JVM: Enum.entries are not annotated with @NotNull
• KT-56072 K2. “IllegalStateException: Fir2IrSimpleFunctionSymbol for is already bound” when trying to access java synthetic property of inherited class
• KT-50082 Kotlin non-overriding property of subclass doesn't shadow same-named Java field from base class
• KT-55822 False positive ABSTRACT_CLASS_MEMBER_NOT_IMPLEMENTED with raw types and mixed overridden members
• KT-55666 K2: label on local function is rejected: “Target label does not denote a function”
• KT-56283 False-positive INVISIBLE_MEMBER on overridden member of more specific type after smart cast
• KT-51969 [FIR] Compilation for expect value class fails with “Fir2IrSimpleFunctionSymbol for [declaration] is already bound”
• KT-56061 K1 does not report error on inconsistent synthetic property assignment
• KT-55125 Difference in generated bytecode for open suspend functions of generic classes
• KT-55295 K2/MPP: JS build functionality
• KT-55909 [K2/N] IndexOutOfBoundsException for a reference to a function defined in companion object superclass
• KT-55664 K2: eliminate ClassId.isSame call from FirClass.isSubclassOf
• KT-55747 K2. “Convention for ‘mod’ is forbidden. Use ‘rem’” error is missing
• KT-56104 Unnecessary inner classes attributes in class files for subclasses
• KT-55570 K2: ACTUAL_WITHOUT_EXPECT error is not reported on a simple actual class
• KT-56176 [K2/N] “IllegalStateException: actual type is kotlin.Int, expected kotlin.Long” when expected type uses typealias
• KT-56199 K2 + MPP + kotlinx.serialization: java.lang.VerifyError: Bad type on operand stack in aaload
• KT-56212 K2: Exception when compiling extension function declaration with illegally chained type parameter receiver
• KT-54140 SOE at IrBasedDescriptorsKt.makeKotlinType with mixing recursive definitely not nullable type with nullability
• KT-56224 Clarify message “Secondary constructors with bodies are reserved for for future releases” for secondary constructors in value classes with bodies
• KT-55503 K2: “Argument type mismatch” caused by using the wrong “this”
• KT-56050 K2: inconsistency regarding visibility of synthetic properties with protected getter and public setter
• KT-49663 FIR: Support @kotlin.jvm.PurelyImplements for java collections
• KT-54507 K2: Wrong implicitModality for interface in FirHelpers
• KT-55468 [K2/N] Crash with debuginfo caused by changed tree using IMPLICIT_COERCION_TO_UNIT
• KT-56269 [K2/N] Don't test “Tailrec is not allowed on open members” in K2
• KT-56172 K2: Fix reporting of PRIVATE_CLASS_MEMBER_FROM_INLINE error
• KT-54647 K2: Function call with Lambda on LHS of assignment leads to KotlinExceptionWithAttachments: FirDeclaration was not found for class org.jetbrains.kotlin.psi.KtFunctionLiteral
• KT-54648 K2: Function call on left side of erroneous assignment isn't resolved
• KT-55171 Put new contracts syntax under a feature flag
• KT-55699 K2. False Negative “Type parameter T is not an expression”
• KT-55973 K2: Exception from UnusedChecker on an unused destructuring
• KT-56275 K2 IDE: Missed error for enum super type
• KT-54775 K2. “IllegalStateException: Expected FirResolvedTypeRef with ConeKotlinType but was FirImplicitTypeRefImpl ” exception on incorrect code
• KT-55528 K2: CFA for property initialization analysis is not run for class initialization graphs
• KT-54410 K2: Deprecation warning instead of “this declaration is only available since Kotlin X” when language version in project are below required to use language feature
• KT-55186 K2: No compilation error on calling exception without constructor
• KT-36776 Treat special constructions (if, when, try) as a usual calls when there is expected type
• KT-54694 Consider enabling BooleanElvisBoundSmartCasts in K1 or K2
• KT-54587 K2. CCE on compilation when some operator fun is needed and it is implemented as an extension function for another class
• KT-54417 K2: move receiver-targeted annotations to KtReceiverParameterSymbol and remove it from FirProperty receiver type
• KT-33917 Prohibit to expose anonymous types from private inline functions

IDE

Performance Improvements

• KT-56613 Reduce memory consumption of light classes

Fixes

• KT-57849 K2: contract violation due to implicit java type with annotation
• KT-57857 LC: FakeFileForLightClass: Read access is allowed from inside read-action
• KT-57578 SLC: incorrect upper bound wildcards
• KT-57917 Analysis API: decompiled value parameters are not resolved
• KT-56046 K2 IDE: Avoid redundant resolve from annotations
• KT-57569 SLC: incorrect visibility for lateinit var with private setter
• KT-57547 SLC: non-last vararg value parameter type mismatch
• KT-57548 SLC: incorrect inheritance list for Comparator
• KT-57579 SLC: unboxed type argument as method return type
• KT-56843 Light classes: certain kinds of constant values in property initializers aren't supported
• KT-56868 SLC: IncorrectOperationException on enum annotation arguments that are not valid Java identifiers
• KT-56833 Light classes: Accessors to lateinit properties don't have @NotNull annotations
• KT-56845 Light classes: Overridden property accessors don't have @Override annotation
• KT-56441 K2 IDE: reference from Java to ObjectName.INSTANCE of private object is red in IDE, but compiled successfully
• KT-56891 Symbol Classes: DefaultImpls classes contain methods without default implementation
• KT-56842 Light Classes: Primitive-backed context receiver parameters shouldn't be marked with @NotNull
• KT-56835 Light classes: Underlying fields for delegated properties should be marked as final and @NotNull
• KT-56840 Light Classes: Inline classes backed by Java primitives shouldn't be marked with @NotNull
• KT-56728 K2 IDE. False positive not applicable to for kotlin annotation with target annotating Java element
• KT-55815 SLC: Keep annotations on type when converting to PsiType
• KT-55669 K2 IDE: INRE from light classes
• KT-55150 Argument for @NotNull parameter ‘scope’ of org/jetbrains/kotlin/resolve/AnnotationResolverImpl.resolveAnnotationType must not be null

IDE. Misc

• KT-58763 K2 IDE: NoSuchMethodError: KtPsiFactory$Companion.contextual

IDE. Script

• KT-56632 Script configuration cannot be loaded for embedded code snippets

JavaScript

New Features

• KT-12784 JS: generate ES2015 compatible modules
• KT-48154 KJS / IR: Inline members support for external types
• KT-51582 FIR: support basic compile-time evaluation for JS backend

Fixes

• KT-39650 KJS IR: provide a way to enable ES2015 class generation
• KT-57990 KJS/IR. Invalid super call for final parent methods (ES classes)
• KT-58246 KJS: ES15 classses — duplicated code in class constructor
• KT-57479 KJS: Add an annotation for a function parameter which checks that a passed argument has an external type
• KT-51706 Partial linkage: in case of absent symbol referred from declaration Native compiler is successful, JavaScript fails
• KT-56237 KJS + IC: Adding or removing interface default implementation doesn‘t invalidate children and doesn’t update JS code
• KT-54638 K2/JS: Fir2ir - implement and use JS-specific mangler
• KT-54028 Native / JS: Using private object implementing a sealed interface causes a linker error
• KT-57423 KJS: Add an annotation for external interfaces which allows to be inherited only by other external interfaces, classes or objects
• KT-57711 K2: Native & JS fail to compile a KLIB that uses const val from a dependency KLIB
• KT-43490 KJS / IR: “Cannot set property message of Error which has only a getter” caused by class that is child of Throwable
• KT-57078 JS IC: Unbound symbol left in SymbolTable in JsIr[ES6]InvalidationTestGenerated.testBreakKlibBinaryCompatibilityWithVariance tests
• KT-54452 Kotlin/JS libraries with “joined” legacy+IR content: publish IR sources for them
• KT-57254 Deprecate external enum declarations
• KT-57002 KJS: “JsParserException: missing name after . operator” when a js(...) block contains an interpolated constant
• KT-53180 Kotlin/JS: generated TypeScript constructor can have “TS1016: A required parameter cannot follow an optional parameter” error with certain properties order
• KT-56961 JS IR: serializedIrFileFingerprints in klib manifest has a wrong format
• KT-56282 KJS: Invalidate incremental cache in case of compiler internal errors
• KT-55720 KJS: ReferenceError: SuspendFunction1 is not defined with 1.8 when importingkotlin.coroutines.SuspendFunction1
• KT-56469 KJS: BE Incremental rebuild spoils source map comment

KMM Plugin

• KT-55402 “Framework not found SQLCipher”: after selection of “Regular framework” as “iOS framework distribution” and installing SqlCihper through CocoaPods
• KT-55988 KN debugger in KMM plugin for Android Studio can't recognize the source code

Language Design

• KT-53778 Release stdlib API about “rangeUntil” operator in 1.9
• KT-53653 Export Enum.entries to Objective-C and Swift
• KT-55177 Deprecate declaration of expect and actual counterparts of same class in one module
• KT-28850 Prohibit protected visibility in final expected classes
• KT-39362 Expect fun interface must have actual fun interface counterpart
• KT-57395 Delay ForbidInferringPostponedTypeVariableIntoDeclaredUpperBound feature to LV 2.0
• KT-55082 Bump KLib version for Enum.entries

Libraries

New Features

• KT-58046 Stabilize remaining kotlin.time API: time sources, time marks, measureTime
• KT-58074 Stabilization of Atomics API in K/N
• KT-55268 Mutiplatform @Volatile annotation
• KT-51908 Provide common function for getting regex capture group by name
• KT-53263 Path.createParentDirectories
• KT-7637 Add toString() to standard delegates classes (NotNullVar, LazyVal, BlockingLazyVal, ...)
• KT-40728 Add AssertionError constructor with cause: Throwable parameter to common stdlib
• KT-57298 Avoid FileAlreadyExistsException from Path.createParentDirectories in case of parent is symlink

Performance Improvements

• KT-54739 build method in collection builders (Set, Map, List) should return a single instance for empty collections
• KT-42589 Provide common listOf(value) overload to avoid allocation of the vararg
• KT-55091 Stdlib: Sequence.toSet() and Sequence.toList() may create the collection twice
• KT-57617 Optimize ReversedListReadOnly iterator
• KT-57607 KJS: Bad performance for ArrayList.addAll

Fixes

• KT-55612 Stabilize experimental API for 1.9
• KT-57728 Explicitly specify level of stability of programmatically-accessible interoperability API
• KT-58548 Stabilize standard library API for Enum.entries
• KT-58276 Deprecate redundant public declarations in kotlin.native.concurrent
• KT-57762 Introduce HexFormat for formatting and parsing hexadecimals
• KT-57317 Repack EnumEntries from stdlib into the compiler
• KT-54702 Native: mark Worker and related APIs as obsolete
• KT-55610 Deprecate kotlin.jvm.Volatile annotation in platforms except JVM
• KT-57404 Native: Support AnnotationTarget.TYPE_PARAMETER
• KT-57318 Change EnumEntries stdlib implementation to be eager
• KT-57137 Native: Consider removing ArrayAsList
• KT-55935 [Kotlin/JVM] Path.copyToRecursively does not work across file systems
• KT-51579 PlatformImplementations loading is not compatible with graalvm native-image --no-fallback

Native

• KT-52594 Provide Alpha support for Native in the K2 platform
• KT-56443 Native link task reports w: Cached libraries will not be used for optimized compilation
• KT-56071 K2/MPP: Native build functionality
• KT-56218 [K2/N] Receiver annotations for properties are not serialized
• KT-56326 [K2/N] RemoveRedundantCallsToStaticInitializersPhase removes important static initializer
• KT-54098 Decommission and remove ‘enableEndorsedLibs’ flag from Gradle setup

Native. Build Infrastructure

• KT-58160 Native: performance build configuration fails with NoSuchMethodError: ‘boolean kotlinx.coroutines.CompletableDeferredKt.completeWith(kotlinx.coroutines.CompletableDeferred, java.lang.Object)’

Native. C and ObjC Import

• KT-54610 Kotlin Native can't call objc_direct functions
• KT-54805 KMP ios memory leak when using CA Layer
• KT-57490 [K/N] Duplicate package names for cinterop klibs with objc protocols fails to link
• KT-57541 Compilation fails without explicit cast on cinterop code

Native. ObjC Export

• KT-56464 K/N: Allow HiddenFromObjC for classes
• KT-57507 K2: Set of Objc exported declarations is different between K1 and K2

Native. Runtime

• KT-58441 Kotlin/Native: @ObjCAction @ObjCOutlet generate bridges without switching state
• KT-57091 Align Native and Java file/class initialization behavior

Native. Runtime. Memory

• KT-56233 [Kotlin/Native] Crash when enum values are accessed in multiple threads
• KT-58130 Implement preview of custom allocator for Kotlin/Native
• KT-56402 Native: if a Kotlin peer for an Obj-C object is created on the main thread, then Kotlin runtime should run objc_release for it on the main thread

Native. Stdlib

• KT-57344 Try to remove strange .equals overload on primitive types
• KT-57592 Native: Remove the default parameter value for AtomicLong constructor

Native. Testing

• KT-57349 Enable more K2 MPP codegen/box tests for Kotlin/Native
• KT-57026 K2: Fix Native test infrastructure for MPP

Reflection

• KT-56650 ArrayStoreException from InlineClassAwareCaller.call with an array of inline class
• KT-56093 Metaspace leak in a Gradle plugin built with Kotlin 1.8.0
• KT-27585 Flaky IllegalPropertyDelegateAccessException: Cannot obtain the delegate of a non-accessible property. Use “isAccessible = true” to make the property accessible
• KT-55937 Optimize implementation of kotlinFunction/kotlinProperty
• KT-54833 Reflection: Incorrect behaviour for Field.kotlinProperty function in companion objects

Tools. CLI

• KT-56209 Add CLI support for HMPP in K2
• KT-57495 Add JVM target bytecode version 20
• KT-56789 Metaspace memory leak in CoreJrtFileSystem
• KT-57077 1.8.20-RC-243 shows Java 19 warnings even if configured with Java 17 toolchain
• KT-56992 Performance test regression in Gradle when switching to Kotlin 1.8.20
• KT-57644 K2: Prohibit passing HMPP module structure with CLI arguments to metadata compiler
• KT-56925 Remove warning about assignment plugin
• KT-56351 Reduce memory usage spent on compiler settings

Tools. Commonizer

• KT-57796 NoSuchFileException in :module-B:commonizeCInterop with Kotlin 1.8.20
• KT-56207 Investigate failing tests in ClassifierCommonizationFromSourcesTest

Tools. Compiler Plugins

Fixes

• KT-57406 FIR Compiler plugins: Assignment plugin incorrectly recognizes qualified names of annotations
• KT-57400 FIR Compiler Plugins: annotated predicate does not work with Java classes
• KT-57140 K2: Implement backwards compatibility for FirFunctionTypeKindExtension
• KT-55375 Remove “legacy” mode of jvm-abi-gen plugin
• KT-53470 FIR: pass MemberGenerationContext to all methods of FirDeclarationGenerationExtension
• KT-51092 Lombok @Value causes IllegalAccessError
• KT-56487 Add more methods to DescriptorSerializerPlugin
• KT-55885 K2 plugin API: Backend-only declarations are not visible from other modules
• KT-55584 K2: Improve registration of session components from compiler plugins
• KT-55843 FIR Plugin API: metaAnnotated predicate returns meta-annotation itself as well
• KT-53874 Optimize checking for plugin applicability and redesign DeclarationPredicates

Tools. Compiler plugins. Serialization

• KT-58067 Serialization: NullPointerException caused by @Contextual property with type with generic
• KT-57730 Serialization: “IllegalStateException: Serializer for element of type .Foo has not been found” caused by serialization of Java type
• KT-56594 K2/serialization reports SERIALIZER_NOT_FOUND over aliased String or primitive types
• KT-56990 “AssertionError: SyntheticAccessorLowering should not attempt to modify other files” in kotlinx-serialization using @Serializer and List argument
• KT-56553 Support ‘serialization plugin intrinsics’ feature in K2
• KT-56244 kotlinx.serialization compiler intrinsic does not work with encodeToString function in 1.8.0

Tools. Daemon

• KT-50846 Remove “new” Kotlin daemon from codebase

Tools. Gradle

New Features

• KT-57159 Add project level compiler options for Kotlin/JVM plugin
• KT-56971 Expose jvmTargetValidationMode property in KotlinCompile Gradle task

Performance Improvements

• KT-57052 Gradle: Stop using exceptions for flow control
• KT-57757 Reduce classpath snapshotter memory consumption
• KT-56052 Implement an in-memory wrapper for PersistentHashMap to avoid applying changes to IC caches before successful compilation

Fixes

• KT-58745 KaptGenerateStubs task should also be configured with the same compiler plugin options
• KT-58571 ExplicitApi mode should not apply for test compilations
• KT-52811 Kotlin Serialization metadata issue due to incompatibility between Gradle Kotlin embedded version and Kotlin Gradle Plugin version
• KT-57224 Add an indicator into build metrics report to show whether K1 or K2 compiler was used to compile the code
• KT-58682 Explicit api mode does not apply in MPP projects
• KT-57736 K2: Introduce an easy way to try K2 compiler in Gradle user projects
• KT-52976 Remove deprecated Gradle conventions usages
• KT-58530 Compiler plugin unbundling changes should be backward compatible with Kotlin plugin
• KT-36904 Adding folders to sourceSets.resources.srcDir() in Gradle script does not work
• KT-57330 Provide collection of usage statistics for the Dokka
• KT-58619 Move all pm20 interfaces into Gradle plugin codebase
• KT-58320 Kotlin daemon OOM help message is missing on OOM in Kotlin Daemon itself
• KT-58167 Applying KAPT plugin to Gradle 8.1 causes configuration cache miss
• KT-53923 Add ‘progressive’ compiler argument to Gradle compiler options
• KT-53924 Add ‘optIn’ compiler arguments to Gradle compiler options
• KT-53748 Remove KotlinCompile setClasspath/getClasspath methods
• KT-56454 Bump minimal support AGP version to 4.2.2
• KT-57767 Gradle: “ZipException: invalid entry size” with 1.8.20
• KT-57397 Add infrastructure to use the build-tools-api to run compilation from Gradle
• KT-56946 Switch incremental Gradle tests for K2 to use language version 2.0
• KT-55624 Update KGP integration tests that use removed in Gradle 8 getClassifier method
• KT-57782 Disable daemon fallback strategy for Gradle integration tests by default
• KT-56645 Gradle: KGP reports an incorrect resources processing task name for JVM projects
• KT-55824 Deprecate commonMain.dependsOn(anything) in user scripts
• KT-57142 Split org.jetbrains.kotlin.gradle.tasks/Tasks.kt into several source files
• KT-56211 Improve Kotlin build reports
• KT-54447 Remove usage of deprecated internal Gradle field in Kotlin Gradle Plugin, replace with equivalent in public API
• KT-49785 Avoid creating task output backups until really needed
• KT-56047 False positive message about full recompilation is displayed while restoring from build cache and then making a syntax error
• KT-56421 Gradle: plugin should not use BasePluginExtension deprecated properties
• KT-55241 Gradle: the VariantImplementationFactories build service state is not persistent making impossible to access factories with configuration cache lazily
• KT-56414 Dependency locking and failed builds with Kotlin 1.8.10
• KT-56357 Gradle: “DefaultTaskCollection#configureEach(Action) on task set cannot be executed in the current context” because of VariantImplementationFactories
• KT-56352 Make build scan reports more readable
• KT-52149 Gradle: declare shared build services usages with Task#usesService
• KT-55741 Gradle 8: Build service ‘*’ is being used by task ‘*’ without the corresponding declaration via ‘Task#usesService’.
• KT-55174 KotlinCompile task produces deprecation “Build service ‘variant_impl_factories_...’ is being used by task”
• KT-55972 Gradle: Add an assertion to all integration tests if warningMode is not FAIL, but the build doesn't produce any warnings

Tools. Gradle. Cocoapods

• KT-38749 Support dependencies between pods when using the cocoapods plugin
• KT-54161 Support adding extra code to generated Podfile from the Kotlin gradle plugin
• KT-49430 Stop invalidating iOS framework generated by KMM module on each Gradle Sync
• KT-56304 Podspec generated with new K/N artifact DSL contains wrong artifact names for static and dynamic libraries
• KT-56162 Provide granular Gradle warnings suppression for CocoaPodsIT

Tools. Gradle. JS

New Features

• KT-32209 org.jetbrains.kotlin.js does not respect Gradle's archivesBaseName
• KT-56158 KJS: Support implementation dependencies
• KT-48791 KJS: Support for Power(ppc64le) and Z(s390x)

Fixes

• KT-57985 K/JS: packageJson Gradle configurations don't inherit unique attributes from JsTarget DSL
• KT-57817 JS: executables for couple of JS targets builds in the same directory
• KT-58199 K/JS: Remove useCoverage method
• KT-57116 KJS / Gradle: commonWebpackConfig not applied if called after binaries.executable()
• KT-58522 K/JS: Upgrade NPM dependency versions
• KT-57629 K/JS: Change default destination of JS production distribution
• KT-57480 K/JS: Use IR compiler by default without explicit choosing of js compiler
• KT-58345 K/JS: Webpack task skipped with ES modules because files have mjs extension
• KT-56458 KJS / Gradle: Unnecessary and confusing “There are multiple versions of “kotlin” used in nodejs build” generated from YarnImportedPackagesVersionResolver
• KT-56690 Kotlin2JsCompiler friendDependencies cannot be configured through friendPaths
• KT-57920 K/JS: Make imported NPM package not considering dev dependencies
• KT-56025 KJS / Gradle: Gradle 8.0 jsBrowserProductionWebpack uses the output of another project's jsProductionExecutableCompileSync
• KT-57630 K/JS: webpack updating twice on one change of kt sources
• KT-47351 KJS / IR: :jsTestPackageJson is unable to find nested included builds under composite build
• KT-57387 Remove support of webpack 4
• KT-57386 Kotlin/JS upgrade npm dependencies
• KT-56765 K/JS: Several binaries use same cache directory
• KT-56488 Debugger won't stop on breakpoints of JS browser test
• KT-56705 KJS / Gradle: Module name starting with ‘@’ isn't properly set when FUS is disabled
• KT-56719 KJS / Gradle: Compile sync task has to sync only changed files
• KT-46428 KJS / IR: Composing build failed “Failed to create MD5 hash for package.json”
• KT-53687 Don't trigger npm and yarn related tasks if it not relevant for assemble
• KT-49915 KJS / Gradle: Gradle build cache miss because of absolute path in KotlinJsIrLink.filteredArgumentsMap
• KT-56192 KJS: In browser testing no original sources in stacktrace
• KT-42395 Kotlin/JS: Gradle DSL: PackageJson.customField() does not accept null
• KT-43305 Support Node.JS downloading for Ubuntu
• KT-48631 KJS: Unconditionally uses linux/x86 binaries
• KT-38015 NodeJS installation does not extract symlinks correctly (npm and npx)

Tools. Gradle. Multiplatform

New Features

• KT-55881 Add possibility to enable/disable sources publication similar to Java Gradle Plugin API

Fixes

• KT-55751 MPP / Gradle: Consumable configurations must have unique attributes
• KT-49933 Support Gradle Configuration caching with HMPP
• KT-58470 Warning about using MPP libraries published in the legacy mode is not reported if the dependency is declared in an intermediate source set
• KT-58086 Warn about using MPP libraries published in the legacy mode
• KT-58466 K2 Gradle: non *.kt files are passed to -Xfragment-sources
• KT-58319 kotlin.git: ProjectMetadataProviderImpl “Unexpected source set ‘commonMain’”
• KT-58281 Kotlin Gradle Plugin: Enable Kotlin/Android SourceSetLayout v2 by default
• KT-51940 HMPP resolves configurations during configuration
• KT-41506 UnknownDomainObjectException: “KotlinSourceSet with name not found” when creating custom compilations after applying withJava to an MPP JVM target
• KT-58209 Do not use the term ‘Module’ in KotlinTargetHierarchy
• KT-56285 TCS: Gradle Sync: IdeProjectToProjectCInteropDependencyResolver: Ensure lenient resolution
• KT-56571 New import broke apiVersion for commonMain, commonTest and jvmAndAndroidMain modules
• KT-56536 Multiplatform: Composite build fails on included build with rootProject.name != buildIdentifier.name
• KT-56841 MPP: Module-to-module dependencies don't work inside included build in included build
• KT-42748 Project that transitively depends on composite build of multimodule multiplatform library cannot resolve dependencies properly
• KT-52356 MPP / Gradle: Missing common classes on KMM project integrated via Gradle included build into an Android application
• KT-51293 Unresolved references with hierarchical project structure when building KotlinMetadata from native-common source set
• KT-56729 commonizeCInterop: Duplicated libraries: co.touchlab:sqliter-driver-cinterop-sqlite3
• KT-56510 Import with included plugin build may fail with OverlappingFileLockException during commonizeNativeDistribution
• KT-56700 V2 MPP Source Set layout warnings should include link to docs
• KT-56115 Multiplatform;Composite Builds: Support import with cinterop commonization enabled
• KT-56429 Fix flaky: MppIdeDependencyResolutionIT.test cinterops - are stored in root gradle folder
• KT-56337 Unable to import a project with cinterop with enableKgpDependencyResolution
• KT-55926 TCS: Gradle Sync: Import Extras on KotlinSourceSet and KotlinTarget
• KT-55891 Deprecate pre-HMPP flags
• KT-56278 TCS: Gradle Sync: [MISSING_DEPENDENCY_CLASS] on libraries used in shared native source sets
• KT-55730 MPP / Gradle: compileKotlinMetadata fails to resolve symbols in additional source sets
• KT-56204 KotlinTargetHierarchy: Changing naming from ‘any’ to ‘with’ prefix
• KT-56111 Multiplatform;Composite Builds: Clean builds fail on when ‘hostSpecificMetadata’ is required

Tools. Gradle. Native

• KT-53108 Expose Kotlin/Native compiler options as Gradle DSL
• KT-58063 Kotlin/Native tasks configuration cache are not compatible with Gradle 8.1
• KT-38317 Kotlin/Native: NSURLConnection HTTPS requests fail in iOS tests due to --standalone simctl flag
• KT-37051 MPP Gradle plugin: duplicated cinterop libraries in composite build
• KT-56280 Gradle: freeCompilerArgs are no longer propagated from compilations to Native binaries
• KT-56205 Shared Native Compilation: False positive ‘w: Could not find’ warnings on metadata klibs

Tools. Incremental Compile

• KT-58289 IC fails to detect a change to class annotations
• KT-56197 If use classpathSnapshot, the invoke place of subclass's super function who has default parameters will not recompiled if it is incremental build
• KT-56886 K2: Changes to Java sources used in Kotlin project do not trigger a rebuild if a previous build was successful
• KT-55021 New IC: “The following LookupSymbols are not yet converted to programSymbols” when removing/renaming file facades

Tools. JPS

• KT-56438 Add minimal statistic report for JPS build
• KT-58314 kotlin-build-statistics is missing for kotlin-jps-plugin
• KT-55696 JPS IC K2 - fix new failing tests with Java interop
• KT-57102 SCE: DefaultErrorMessages$Extension: DefaultErrorMessagesWasm not a subtype after adding WASM error messages
• KT-56165 Language version 1.9 and 2.0 is absent in Kotlin Compiler settings

Tools. Kapt

• KT-57598 K2: Support a fallback mode executing Kapt with K1 even when the compiler is run with languageVersion=2.0
• KT-54468 KAPT Gradle plugin causes eager task creation
• KT-58027 Kotlin 1.8.20 kapt issue “null: KtCallExpression: build()”
• KT-58226 KAPT: “org.jetbrains.kotlin.psi2ir.generators.ErrorExpressionException: null: KtNameReferenceExpression” with enum with secondary constructor
• KT-56360 Kapt with JVM IR changes fields order
• KT-54380 Kapt / IR: Build failed when inheritance by functional interface with suspend modifier

Tools. Maven

• KT-58101 ‘Unable to access class’ in kotlin-maven-plugin after updating to Kotlin 1.8.20
• KT-58048 Maven: “Too many source module declarations found” after upgrading to 1.8.20
• KT-13995 Maven: Kotlin compiler plugin should respect model's compile source roots
• KT-55709 Maven: “java.lang.reflect.InaccessibleObjectException: Unable to make field protected java.io.OutputStream java.io.FilterOutputStream.out accessible”

Tools. Scripts

• KT-58366 The obsolete kotlin-script-util jar is still published and contains broken JSR-223 implementation

Tools. Wasm

• KT-56585 Change wasmBrowserRun Browser Executable to System Default
• KT-56159 Running (karma) tests doesn't work in a project generated by wizard “Browser Application for Kotlin/Wasm”
• KT-57203 Update Kotlin/Wasm to support Gradle 8

1.8.21

Compiler

• KT-57848 Native: compilation of dynamic/static library fails with Xcode 14.3
• KT-57875 Native compilation failure: Suspend functions should be lowered out at this point, but FUN LOCAL_FUNCTION_FOR_LAMBDA
• KT-57946 KAPT: “RuntimeException: No type for expression” with delegate

JavaScript

• KT-57356 KJS: StackOverflowException on @JsExport with type parameters referring to one another

Tools. Compiler plugins. Serialization

• KT-58067 Serialization: NullPointerException caused by @Contextual property with type with generic
• KT-57730 Serialization: “IllegalStateException: Serializer for element of type .Foo has not been found” caused by serialization of Java type

Tools. Gradle. JS

• KT-57766 KJS / Gradle “Module not found: Error: Can't resolve ‘kotlin-kotlin-stdlib-js-ir’” when using “useEsModules”

Tools. Kapt

• KT-58027 Kotlin 1.8.20 kapt issue “null: KtCallExpression: build()”

Tools. Maven

• KT-58048 Maven: “Too many source module declarations found” after upgrading to 1.8.20
• KT-58101 ‘Unable to access class’ in kotlin-maven-plugin after updating to Kotlin 1.8.20

1.8.20

Analysis API

• KT-55510 K2: Lost designation for local classes
• KT-55191 AA: add an API to compare symbol pointers
• KT-55487 K2: symbol pointer restoring doesn't work for static members
• KT-55336 K2 IDE: “java.lang.IllegalStateException: Required value was null.” exception while importing a compiled JPS project
• KT-55098 AA: KtDeclarationRenderer should render a context receivers
• KT-51181 LL API: errors for SAM with suspend function from another module
• KT-50250 Analysis API: Implement Analysis API of KtExpression.isUsedAsExpression
• KT-54360 KtPropertySymbol: support JvmField in javaSetterName and javaGetterName

Analysis API. FE1.0

• KT-55825 AA FE1.0: stackoverflow when resolution to a function with a recursive type parameter

Analysis API. FIR

• KT-54311 K2: proper implementation of KtSymbolPointer
• KT-50238 Analysis API: Implement KSymbolPointer for KtSymbol

Analysis API. FIR Low Level API

• KT-52160 FIR: Substitution overrides on FirValueParameter-s are incorrectly unwrapped
• KT-55566 LL FIR: Tests in compiler/testData/diagnostics/tests/testsWithJava17 fail under LL FIR
• KT-55339 LL FIR: Missing RECURSIVE_TYPEALIAS_EXPANSION error in function type alias
• KT-55327 LL FIR: Diverging UNRESOLVED_REFERENCE errors in recursive local function test
• KT-54826 KtSymbolPointer: migrate from IdSignature to our own solution

Android

• KT-54464 MPP, Android SSL2: Add a flag for suppressing warning in case of using Android Style folders

Backend. Wasm

• KT-38924 Wasm support in nodejs
• KT-56160 Getting WebAssembly.CompileError in browsers not supported GC and other required proposals
• KT-46773 Implement an experimental version of the Kotlin/Wasm compiler backend
• KT-56584 K/Wasm: Can't link symbol class
• KT-56166 Fix compatibility with Firefox Nightly
• KT-55589 Basic support of WASI
• KT-53790 Reading from “node:module” is not handled by plugins error with Kotlin/Wasm 1.7.20-Beta

Compiler

New Features

• KT-54535 Implement custom equals and hashCode for value classes in Kotlin/JVM
• KT-55949 Release experimental @Volatile support in native
• KT-44698 Frontend (K2): print file name/line on compiler crash/exception
• KT-54666 K2: Allow to skip specifying type arguments for members from raw type scope
• KT-54524 Implement Java synthetic property references in compiler
• KT-54024 K2: support -Xlink-via-signatures mode

Performance Improvements

• KT-33722 JVM: Result API causes unnecessary boxing
• KT-53330 Optimize for-loops and contains over open-ended ranges with until operator (..<) for all backends
• KT-54415 JVM BE: performance loss related to multi-field inline class lowering
• KT-48759 Infix compareTo boxes inline classes
• KT-55033 Make org.jetbrains.kotlin.resolve.calls.inference.model.NewConstraintSystemImpl#runTransaction an inline function
• KT-54501 Improve code generation for inline classes with custom equals

Fixes

• KT-56965 K/N: linkDebugFrameworkIosArm64 tasks failing with UnsupportedOperationException: VAR name:disposables type:com.badoo.reaktive.disposable.CompositeDisposable [val]
• KT-56611 Native: new native caches are broken when KONAN_DATA_DIR is defined to a directory inside ~/.gradle
• KT-55251 Enum.entries compilation error should be more specific
• KT-56527 K2: “AssertionError: Assertion failed” during compilation in SequentialFilePositionFinder
• KT-56526 InvalidProtocolBufferException on reading module metadata compiled by K2 in 1.8.20
• KT-57388 Kapt+JVM_IR: “RuntimeException: No type for expression” for delegated property
• KT-53153 Synthetic Enum.entries can be shadowed by user-defined declarations
• KT-51290 “AssertionError: Parameter indices mismatch at context” with context receivers
• KT-57242 Equals behaviour for value classes implementing interfaces is different between 1.8.10 and 1.8.20-RC
• KT-57261 “IllegalArgumentException was thrown at: MemoizedInlineClassReplacements.getSpecializedEqualsMethod” when comparing non-inline class instance with an inline class instance
• KT-57107 Handling of Windows line endings CRLF broken in latest snapshot with K2
• KT-57117 K2: Compiler reports invalid columns in diagnostics in case of crlf line endings
• KT-56500 The type parameter TYPE_PARAMETER name:E index:0 variance: superTypes:[kotlin.Any?] reified:false is not defined in the referenced function FUN LOCAL_FUNCTION_FOR_LAMBDA
• KT-56258 VerifyError: Bad local variable type when using -Xdebug
• KT-54455 Unexpected result of equality comparison of inline class objects
• KT-56251 Generic Java synthetic property references don't work in K2
• KT-55886 K2: Wrong code location mapping with Windows line endings
• KT-43296 FIR: Complicated interaction between smart cast and inference leads to false-positive diagnostic
• KT-57053 Problem around anonymous objects in inline functions
• KT-54950 NoSuchMethodError on calling ‘addAll’ on inline class implementing mutable list
• KT-56815 compileKotlin task is stuck with while(true) and suspend function
• KT-56847 Unresolved reference to Java annotation in Kotlin class with the same name packages
• KT-52459 Context receivers: AbstractMethodError caused by Interface method with both an extension and a context receiver is overriden incorrectly in subclasses
• KT-56215 JVM: Object extension function nullable receiver null check false negative when object is null
• KT-56188 K/N: AssertionError when casting SAM wrapper with generic type parameter
• KT-56033 Restore ‘isMostPreciseContravariantArgument’ function signature for compatibility
• KT-56407 Backend Internal error: Exception during IR lowering during :daemon-common-new:compileKotlin
• KT-55887 K2. “IllegalStateException: org.jetbrains.kotlin.ir.expressions.impl.IrErrorCallExpressionImpl is not expected” on adding kotlin.plugin.jpa
• KT-56701 K2 (with LightTree) reports syntax errors without additional information
• KT-56649 K2 uses 0-index for line numbers rather than 1-index
• KT-54807 K2. Support @OnlyInputTypes diagnostic checks (contains like calls)
• KT-51247 “AssertionError: org.jetbrains.kotlin.ir.expressions.impl.IrFunctionReferenceImpl” caused by context receiver functional types
• KT-55436 K1: implement warning about shadowing of the derived property by the base class field
• KT-56521 Static scope initializers sometimes not called when first accessed from interop
• KT-49182 Strange cast from Unit to String
• KT-55288 False negative WRONG_ANNOTATION_TARGET on type under a nullability qualifier
• KT-33132 Cannot override the equals operator twice (in a class and its subclass) unless omitting the operator keyword in the subclass
• KT-56061 K1 does not report error on inconsistent synthetic property assignment
• KT-55483 K2: Fir is not initialized for FirRegularClassSymbol java/lang/invoke/LambdaMetafactory
• KT-55125 Difference in generated bytecode for open suspend functions of generic classes
• KT-54140 SOE at IrBasedDescriptorsKt.makeKotlinType with mixing recursive definitely not nullable type with nullability
• KT-56224 Clarify message “Secondary constructors with bodies are reserved for for future releases” for secondary constructors in value classes with bodies
• KT-54662 K2: Assign operator ambiguity on synthetic property from java
• KT-54507 K2: Wrong implicitModality for interface in FirHelpers
• KT-55912 “UnsupportedOperationException: Unsupported const element type kotlin.Any” caused by kotlin fqn in annotation
• KT-56018 [K2/N] Fir2Ir does not take value parameters annotations from FIR to IR
• KT-56091 [K2/N] Fix various property annotations
• KT-54209 K2: false positive deprecation on a class literal with deprecated companion
• KT-55977 [K2/N] Suspend function reference type is wrongly serialized to klib
• KT-55493 K2: False-negative VAL_REASSIGNMENT
• KT-55372 K2: false-negative INVISIBLE_MEMBER for call of static method of package-private Java grandparent class
• KT-55371 K2: compiled code fails trying to call static method of package-private Java grandparent class
• KT-55408 K2: can't access indirectly inherited from a package-private class Java members through a type alias
• KT-55116 K2: store static qualifiers in dispatch receiver field
• KT-55996 K2: cannot switch the light tree mode off with -Xuse-fir-lt=false
• KT-55368 K2/MPP: Metadata compiler
• KT-54305 K1: implement warning “synthetic setter projected out”
• KT-52027 “NullPointerException” when using context receivers with inline fun
• KT-55984 Stack allocated array is not cleaned between loop iterations
• KT-52593 Provide Alpha support for JS in the K2 platform
• KT-54656 NoSuchMethodError on invoking Java constructor which takes an inline value class as a parameter
• KT-56015 Remove unnecessary stack traces for special checks for ObjC interop
• KT-55606 K2. Infix operator “in” works on ConcurrentHashMap when it's declared through another class
• KT-53884 K2: “IllegalStateException: Fir is not initialized for FirRegularClassSymbol com/appodeal/consent/Consent.a” when importing this class
• KT-54502 Synthetic extensions on raw types work differently from regular getter calls
• KT-49351 FIR: Raw type scopes are unsupported
• KT-49345 FIR: Properly support raw types in type parameter upper bounds
• KT-55733 K2. Reference resolve works incorrectly for classes declared through typealias
• KT-46369 FIR: Investigate raw types for arrays
• KT-41794 [FIR] Implement raw type based scope
• KT-55181 K2. No compilation error on throwing not throwable
• KT-55398 Kotlin inline nested inline lambda's inline variable will inline not correctly
• KT-55359 K2. No error when secondary constructor does not delegate to primary one
• KT-55759 K2: Unresolved reference of serializer if library linking is used (with kotlinx.serialization plugin)
• KT-54705 Kotlin scripting doesn't support files with UTF-8 BOM
• KT-51753 FIR: various errors due to expect/actual mapping absence in translator
• KT-44515 FIR DFA: extract non-null info from anonymous object's initialization
• KT-55018 K2 / serialization: FIR2IR fails on local companion
• KT-55284 Refactor org.jetbrains.kotlin.diagnostics.KtDiagnosticReportContextHelpersKt#reportOn(...)
• KT-55693 K2. Type inference changed in k2
• KT-54742 K2: lambda with conditional bare return inferred to return Any, not Unit
• KT-54332 Add deprecation warning for false-negative TYPE_MISMATCH for KT-49404
• KT-55509 Invisible fake overrides are listed among lazy IR class members
• KT-55597 K2. This type has a constructor, and thus must be initialized here error is missed for anonymous object inherits class with no-arg constructor
• KT-54357 “ClassCastException: class org.jetbrains.kotlin.resolve.scopes.receivers.ExtensionReceiver cannot be cast to class org.jetbrains.kotlin.resolve.scopes.receivers.ContextClassReceiver” with anonymous object extending a class with a context receiver
• KT-51397 “VerifyError: Bad type on operand stack” with context receivers
• KT-54905 KLIB check on compiled with pre-release version
• KT-55615 K2 often does not expand type aliases in annotation position
• KT-54522 K2: ambiguity between operator candidates on += (plusAssign) to reassigned var of MutableList type
• KT-54300 K2: No “Projections are not allowed for immediate arguments of a supertype” for projection in supertypes of an anonymous object
• KT-55495 K2: support lateinit intrinsic applicability checker
• KT-55494 MPP. Error when building for native: Compilation failed: Global ‘kclass:io.ktor.serialization.$deserializeCOROUTINE$0’ already exists
• KT-54980 K2: Explicit type arguments in calls with the wrong number of type arguments are not resolved
• KT-54730 K2: type aliases to generic functional interfaces attempt to re-infer explicitly specified type parameters
• KT-55611 IC / MPP: Optional internal annotations are not visible on incremental builds
• KT-55324 K2: ControlFlowGraphBuilder fails with index out of bounds exception
• KT-55656 K2: PRIMARY_CONSTRUCTOR_DELEGATION_CALL_EXPECTED being a warning causes a NPE in runtime
• KT-51277 “NoSuchElementException: Collection contains no element matching the predicate” with context receivers and star projection
• KT-52791 Class with multiple context receivers fails -Xvalidate-ir with “Validation failed in file”
• KT-55071 Shared Native Compilation: Calls from intermediate common source set cannot use default parameters declared in expect common functions
• KT-52193 Native: Unable to call primary constructor with default values in an actual class without passing the values, in nativeMain source set
• KT-54573 K2: untouched implicit types in delegated constructor call of data class with @JvmRecord
• KT-55037 Support jspecify annotations moved to the new package org.jspecify.annotations in jspecify 0.3
• KT-48989 JVM / IR: “IllegalStateException: Bad exception handler end” when first parameter of inline function is nullable with “try/catch/finally” default value and second parameter tries to call toString() on the first
• KT-55231 K2: Contract declarations are not passed to checkers
• KT-54411 False positive: INFERRED_TYPE_VARIABLE_INTO_POSSIBLE_EMPTY_INTERSECTION on kotlinx.coroutines code
• KT-55005 Inconsistent behavior of array set operation in Kotlin 1.7.21
• KT-44625 Property backing/delegate field annotations are not serialized/deserialized for non-JVM targets
• KT-42490 Receiver annotations are not serialized/deserialized for non-JVM targets
• KT-53441 K2: cannot access static method of package-private Java grandparent class
• KT-54197 [K2] Exception from inliner for inline function with context receiver
• KT-55246 Disable ‘CustomEqualsInValueClasses’ feature in 1.9 language version
• KT-55247 Disable ‘InlineLateinit’ feature in 1.9 language version
• KT-53957 K2 and -Xlambdas=indy: LambdaConversionException on reference to method with both context and extension receivers
• KT-55421 K2: get rid of potentially redundant call of preCacheBuiltinClassMembers from getIrClassSymbol
• KT-52815 Compiler option -Xjdk-release fails to compile mixed projects
• KT-52236 Different modality in psi and fir
• KT-54921 K2: cannot access static field of package-private Java parent class
• KT-53698 K2: FIR2IR fails on call of inivisble extension function with Suppress
• KT-53920 K2: “NoSuchElementException: Key org.jetbrains.kotlin.fir.resolve.dfa.cfg.ClassExitNode@ef115ab is missing in the map” with unreachable code and anonymous object
• KT-55358 INTEGER_OPERATOR_RESOLVE_WILL_CHANGE is not reported in return positions of functions
• KT-51475 “ArrayIndexOutOfBoundsException: Index 4 out of bounds for length 4” with context(Any) on inline function with contract
• KT-51951 “IllegalStateException: No receiver” caused by implicit invoke on typealias context receiver
• KT-52373 Context receivers: ClassCastException: function with dispatch, context, and extension receivers produces this when a parameter's default is included
• KT-54220 K2: compiler fails on compiling plus expression on unsigned int
• KT-54692 K2: compiler fails on compiling unsigned shifts
• KT-54824 K2: missing smartcast after two levels of aliasing and a reassignment
• KT-53368 Out of bounds read in sse version of String::hashCode
• KT-54978 K2: Property accesses with explicit type arguments pass frontend checkers
• KT-51863 ClassCastException when using context receivers with named argument.
• KT-55123 JvmSerializableLambda is not applicable in common code in multiplatform projects
• KT-45970 Missing deprecation warnings for constant operators calls in property initializers
• KT-54851 K2: analysis of as/is contains multiple errors that result in missing diagnostics
• KT-54668 K2: Inference error in body of lazy property with elvis with Nothing in RHS
• KT-55269 FIR2IR: Static functions and nested classes are missing from Fir2IrLazyClass
• KT-55026 K2: Function hides internal constructor from another module
• KT-53070 Update intellij testdata fixes for FIR and merge it to master
• KT-53492 No parameter null check generated for constructor taking an inline class type
• KT-50489 Smart cast may lead to failing inference
• KT-55160 Kotlin's fragment element types must not extend IStubFileElementType
• KT-55143 K2: INAPPLICABLE_JVM_NAME in JVM does not work for inline classes
• KT-47933 Report warning if kotlin.annotation.Repeatable is used together with java.lang.annotation.Repeatable
• KT-55035 FIR: do not use FirValueParameter for FirFunctionalTypeRef
• KT-55095 Wrong containingDeclarationSymbol in type parameter from Enhancement
• KT-53946 K2: don't resolve Enum.declaringClass and Enum.getDeclaringClass
• KT-54673 K2. “Superclass is not accessible” from interface error for sealed interfaces
• KT-55074 OptIn false negative: constructor call with default argument value
• KT-54260 K2: “AssertionError: No modifier list, but modifier has been found by the analyzer” when annotated annotation and AllOpen plugin
• KT-55034 FIR: provide information about containing function/constructor to FirValueParameter
• KT-54744 K2: reassigning a var erases smartcast info of a variable derived from the old value
• KT-53988 K2: False negative “The expression cannot be a selector (occur after a dot)”
• KT-53983 K2 crashes with NPE when ‘this’ is used inside enum class constructor
• KT-54910 Can not declare typed equals operator in inline class with “Nothing” return type
• KT-54909 Usage of custom typed equals operator in generic inline class is type-unsafe
• KT-53371 Properly resolve FIR to get fully resolved annotations
• KT-53519 FIR: argument mapping for annotations on value parameter is not properly built
• KT-54827 MPP: “java.lang.IndexOutOfBoundsException: Index: 0” during compilation of androidMain target
• KT-54417 K2: move receiver-targeted annotations to KtReceiverParameterSymbol and remove it from FirProperty receiver type
• KT-54972 K2: Local functions with multiple type arguments are broken
• KT-54762 Private constructor is accessible from a public inline function via @PublishedAPI annotation
• KT-54832 Deprecate incorrect callable references resolution behavior for KT-54316
• KT-54732 DirectedGraphCondensationBuilder.paint fails with StackOverflowError during linkReleaseFrameworkIos64
• KT-54897 K2: value class with private constructor stripped by jvm-abi-gen cannot be used in another module
• KT-54784 NPE from IrSourceCompilerForInlineKt.nonLocalReturnLabel on non-local break and continue in anonymous initializers and in scripts
• KT-54840 Field for const property on interface companion object loses deprecated status when copied to interface
• KT-53825 class files are generated when compilation fails with platform declaration clash
• KT-54526 K2: Raw type scope is lost after exiting from elvis
• KT-54570 K2: False-positive OVERLOAD_RESOLUTION_AMBIGUITY in case of combination of raw types
• KT-52157 Annotation on type parameter isn't present in the symbol loaded from the library
• KT-54318 VerifyError on { null } in catch block
• KT-54654 K2: Implicit types leaks into delegated member
• KT-54645 K2: Clash of two inherited classes with the same name
• KT-53255 [FIR2IR] StackOverflowError with long when-expression conditions
• KT-48861 No warning on incorrect usage of array type annotated as Nullable in Java
• KT-54539 @Deprecated on members of private companion object is no longer needed
• KT-54403 Unexpected behaviour on overridden typed equals in inline class
• KT-54536 Unexpected result of comparison of inline class instances
• KT-54603 ClassCastException on comparison of inline classes with custom equals
• KT-54401 Unhandled exception on compilation inline class with ‘equals’ from ‘Any’ returning ‘Nothing’
• KT-54378 K2: smart cast breaks subtyping in case with complex projections
• KT-53761 Reified type not propagated to supertype token through two inline functions
• KT-53876 Manually instantiated annotations with unsigned arrays are not equal
• KT-51740 NO_VALUE_FOR_PARAMETER: Consider increasing error highlighting range
• KT-54084 ClassCastException when trying to call a context receiver's method
• KT-51282 IllegalAccessError: Compiler for JVM 1.8+ makes lambdas access unaccessible classes when using @JvmMultifileClasses
• KT-53479 False positive “Cannot access ‘runCatching’ before superclass constructor has been called”
• KT-50950 JVM IR: “AssertionError: FUN SYNTHETIC_GENERATED_SAM_IMPLEMENTATION” when using bound reference to suspend SAM function
• KT-49364 “VerifyError: Bad type on operand stack” on cast which “can never succeed” from ULong to Int
• KT-51478 Inapplicable receiver diagnostic expected when there are two context receiver candidates

Docs & Examples

• KT-32469 @Synchronized on extension method doesn't generate instance lock

IDE

New Features

• KTIJ-24378 Update Kotlin plugin to 1.8.0 in IDEA 223.2

Performance Improvements

• KT-55445 KtUltraLightClassModifierList.hasModifierProperty requires resolve for PsiModifier.PRIVATE

Fixes

• KTIJ-24657 Disable pre-release and other metadata checks in IDE
• KT-55929 Unresolved dependencies for intermediate multiplatform SourceSets
• KTIJ-24179 Bundle Kotlin 1.8.0 with Intellij IDEA 2022.3.2
• KTIJ-23547 K2 IDE: Functional type: explicit parameter name VS ParameterName annotation
• KTIJ-23347 K2 IDE. False positive “Symbol fun intFun(): Unit is invisible” in tests
• KT-55862 Can't resolve kotlin-stdlib-js sources in IDE
• KTIJ-23587 K2: SOE in delegate field resolution
• KT-55782 [SLC] Typealiases are not exapnded in arguments of annotations
• KT-55778 [SLC] Incorrect determination of useSitePostion for types of local declarations
• KT-55780 [SLC] No approximation of anonymous and local types in members
• KT-55743 K2 SLC: SymbolLightClassForClassOrObject must have a name
• KT-55604 Descriptor leak
• KT-55502 SLC: drop redundant ‘final’ modifier from synthetic static enum members
• KT-55497 LC: drop @NotNull annotation from parameter from synthetic Enum.valueOf
• KT-55496 SLC: generated synthetic enum methods by symbols instead of manual creation
• KT-55481 SLC: implement correct java annotations for annotation classes (Retention, Target, etc.)
• KT-55470 SLC: implement light class for RepeatableContainer
• KT-55442 SLC: ‘isInheritor’ for ‘DefaultImpls’ should work correctly
• KTIJ-23449 K2: “parent must not be null” from SymbolLightClassBase.getContext()
• KT-40609 IDE: False positive “Exception is never thrown...” in Java when Kotlin getter is annotated with Throws
• KT-54051 Migrate symbol light classes from KtSymbol to KtElement

IDE. Completion

• KTIJ-22503 Support code completion for data objects
• KTIJ-22361 ISE “java.lang.IllegalStateException: Expected FirResolvedTypeRef with ConeKotlinType but was FirImplicitTypeRefImpl ” on K2

IDE. Debugger

• KTIJ-24259 Debugger is stuck in an infinite loop in an Android project
• KTIJ-24003 Smart step into doesn't work for Java synthetic properties references
• KTIJ-24039 Support smart step into for property setters

IDE. Decompiler, Indexing, Stubs

• KTIJ-24351 Kotlin Bytecode tool window: NullPointerException during inlining of inline function with object literal

IDE. Gradle Integration

• KTIJ-24616 Gradle Integration: “NoSuchMethodError: 'java.util.Collection org.jetbrains.kotlin.idea.projectModel.KotlinCompilation.getDeclaredSourceSets” during sync fail after updating Kotlin IJ Plugin to 1.8.20-Beta
• KT-55347 Broken IDE sync for js: java.lang.IllegalStateException: Accessing Compile Dependencies Transformations is not yet initialised
• KTIJ-23781 TCS: Gradle Sync: Support friend&dependsOn via IdeaKotlinSourceDependency

IDE. Gradle. Script

• KT-56941 Gradle KTS / Navigation: Go to declaration for Java types doesn't work

IDE. Inspections and Intentions

• KTIJ-23404 K2 IDE. Platform type is inserted as type parameter for “Change return type” intention
• KTIJ-24319 “Set module version to *” quickfix isn't working
• KTIJ-23225 “Change package” intention unintentionally and intractably replaces text inside of critical strings and comments
• KTIJ-23892 UsePropertyAccessSyntaxInspection should also suggest replacing getter method references with method synthetic properties referencies after Kotlin 1.9
• KTIJ-22087 Support IDE inspections for upcoming data objects
• KTIJ-24286 Constant conditions: false positive “Cast will always fail” with cast of java.lang.String to kotlin.String
• KTIJ-23859 ConvertObjectToDataObjectInspection support more hashCode and toString cases
• KTIJ-23760 Get rid of readResolve logic in ConvertObjectToDataObjectInspection

IDE. KDoc

• KTIJ-24342 KDoc: First line break character is swallowed when pasted

IDE. Misc

• KTIJ-24370 Remove link to k2.xml from plugin.xml in kt-223 branches
• KTIJ-24210 Compatibility issue with the CUBA plugin

IDE. Multiplatform

• KTIJ-21205 MPP: Kotlin not configured error is shown for K/N sources if Android target is presented
• KT-52172 Multiplatform: Support composite builds
• KT-56198 Multiplatform;Composite Builds: import fails if single jvm target multiplatform project consume included jvm build
• KTIJ-24147 MPP: NullPointerException: versionString must not be null

IDE. Refactorings. Move

• KTIJ-24243 Move declarations: “Search in comments and strings” and “Search for text occurrences” options are always enabled when files are moved

IDE. Script

• KT-56632 Script configuration cannot be loaded for embedded code snippets

IDE. Wizards

• KTIJ-24562 Android target created by wizard contains AGP higher than supported
• KTIJ-24402 Changes “Browser Application for Kotlin/Wasm” wizard template
• KTIJ-23525 Wizard: Compose multiplatform: project won't build and require higher compileSdkVersion

JavaScript

New Features

• KT-54118 Kotlin/JS IR: keep declarations with non-minified names
• KT-35655 Investigate could we use “names” field in SourceMaps to improve debug experience

Fixes

• KT-55971 KJS: Result of suspend function cannot be assigned to property of dynamic value
• KT-52374 KJS / IR: caling suspend function as dynamic ignores the rest of the expression
• KT-56884 KJS: “Top-level declarations in .d.ts files must start with either a ‘declare’ or ‘export’ modifier.” caused by enum and array inside the companion object
• KT-51122 Provide fully-qualified method name in Kotlin/JS source maps
• KT-56602 KJS / Serialization: polymorphicDefaultDeserializer unbound on Kotlin 1.8.20-Beta
• KT-56580 KJS: languageVersionSettings string is unstable
• KT-56581 KJS: Lock file for incremental cache
• KT-56582 KJS: Function type interface reflection crashes the compiler in incremental build
• KT-55720 KJS: ReferenceError: SuspendFunction1 is not defined with 1.8 when importingkotlin.coroutines.SuspendFunction1
• KT-56469 KJS: BE Incremental rebuild spoils source map comment
• KT-55930 KJS: A recursive callable reference of the inline function leads broken cross module references
• KT-31888 Kotlin/JS: make possible to call main() in main run tasks, but not in test tasks
• KT-51581 FIR: support JS backend
• KT-55786 KJS: Rewriting of secondary constructors if they are protected
• KT-52563 KJS / IR: Invalid TypeScript generated for class extending base class with private constructor
• KT-55367 KJS / IR + IC: Moving an external declaration between different JsModules() doesn't rebuild the JS code
• KT-55240 KJS: “NoSuchElementException: No element of given type found” caused by @JsExport and Throwable's child class
• KT-54398 KJS / IR + IC: Support *.d.ts generation
• KT-55144 KJS / IR + IC: Modifying an inline function which is used as a default param in another inline function doesn't invalidate a caller
• KT-54134 KJS / IR: “TypeError: Cannot read properties of undefined” in js block wrapped with suspend functions around
• KT-54911 KJS / IR + IC: invalidate all klib dependencies after removing it
• KT-54912 KJS / IR + IC: Commit cache header only in the end (after lowering)
• KT-52677 Native: StackOverFlow during “kotlin.ir.util.RenderIrElementVisitor$renderTypeAnnotations$1.invoke”
• KT-54480 KJS: “Exported declaration contains non-consumable identifier” warning when exporting modules as default
• KT-41294 KJS: Weird behaviour of j2v8 in test infra
• KT-54173 Kotlin/JS + IR: failed to provide keep setting to avoid DCE remove of default interface function from implementing object

Language Design

• KT-55451 Preview of lifting restriction on secondary constructor bodies for value classes
• KT-54621 Preview of Enum.entries: modern and performant replacement for Enum.values()
• KT-54525 Preview of Java synthetic property references
• KT-55337 Preview of data objects
• KT-55344 Deprecate @Synchronized in platforms except JVM

Libraries

• KT-35508 EXC_BAD_ACCESS(code=2, address=0x16d8dbff0) crashes on iOS when using a sequence (from map() etc.)
• KT-56794 Libraries: “Recursively copying a directory into its subdirectory is prohibited” Path.copyToRecursively fails on copying from one ZipFileSystem to another ZipFileSystem
• KT-55935 [Kotlin/JVM] Path.copyToRecursively does not work across file systems
• KT-55978 Provide Common Base64 encoding in stdlib
• KT-46211 [Kotlin/Native] Stack overflow crash in Regex classes with simple pattern and very large input
• KT-31066 Add Closeable & use to common stdlib
• KT-55609 Introduce experimental kotlin.concurrent.Volatile annotation
• KT-39789 Segfault in Kotlin/Native regex interpreter
• KT-53310 Native: HashMap/HashSet doesn't reclaim storage after removing elements

Native

• KT-56443 Native link task reports w: Cached libraries will not be used for optimized compilation
• KT-55938 [Kotlin/Native] Inline functions accessing ObjC class companion cause compiler to crash when building static caches in 1.8.20 dev build

Native. C and ObjC Import

• KT-55303 Objective-C import: improve -fmodules flag discoverability.
• KT-39120 Cinterop tool doesn't support the -fmodules compiler argument
• KT-40426 Incorrect Objective-C extensions importing that prevents UIKit usage
• KT-55653 Since Kotlin 1.8.0 NSView.resetCursorRects doesn't exist anymore and cannot override it
• KT-54284 Kotlin/Native: cinterop produces non-deterministic metadata

Native. ObjC Export

• KT-56350 Kotlin/Native: restore “use Foundation” in generated Objective-C frameworks
• KT-55736 Native: exporting suspend function from a cached dependency to Objective-C crashes with “Suspend functions should be lowered out at this point”
• KT-53638 Native: support disabling mangling globally for Swift names in generated Objective-C header
• KT-53069 SOE on K/N framework build for Arm64
• KT-53317 ObjCName annotation is not applied to an extension receiver in Objective-C export

Native. Stdlib

• KT-53064 Native: provide stdlib API to obtain memory management statistics

Reflection

• KT-27585 Flaky IllegalPropertyDelegateAccessException: Cannot obtain the delegate of a non-accessible property. Use “isAccessible = true” to make the property accessible
• KT-55178 Improve performance of KCallable.callBy
• KT-53279 Reflection: “KotlinReflectionInternalError: Method is not supported” caused by @Repeatable annotation deserialization at runtime if it's repeated and contains arrays
• KT-44977 Reflection: ClassCastException caused by annotations with “AnnotationTarget.TYPE” usage on array attributes access

Tools. CLI

• KT-57077 1.8.20-RC-243 shows Java 19 warnings even if configured with Java 17 toolchain
• KT-56992 Performance test regression in Gradle when switching to Kotlin 1.8.20
• KT-56789 Metaspace memory leak in CoreJrtFileSystem
• KT-56925 Remove warning about assignment plugin
• KT-54652 Enable -Xuse-fir-lt by default when -Xuse-k2 is turned on, provide way to disable
• KT-55784 Unable to format compilation errors with ansi colors in compilation server
• KT-54718 K2: Compiler crashes with “IllegalArgumentException: newPosition > limit”
• KT-54337 CLI: compiling module-info.java without explicitly specified JDK home leads to a weird error

Tools. Commonizer

• KT-47429 [Commonizer] OKIO support
• KT-51517 C Interop Commonizer Fails On Classifier That Doesn't Exist

Tools. Compiler Plugins

Fixes

• KT-53590 K2 Allopen does not look for transitive meta-annotations
• KT-56487 Add more methods to DescriptorSerializerPlugin
• KT-54020 [K2] [NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER] error in case ‘static Name’ param was added to @AllArgsConstructor annotation and an empty list is set as a constructor param value
• KT-53096 Create a pack of compiler utilities for generating declarations from plugins
• KT-55248 K2/PluginAPI: getCallableNamesForClass/generateClassLikeDeclaration are not called for synthetic companions of local classes
• KT-54756 Deprecate “legacy” mode of jvm-abi-gen plugin
• KT-55233 jvm-abi-gen strips out InnerClass attributes
• KT-54994 K2 plugin API: Compile-time constants are not evaluated before IR
• KT-55023 K2 plugin API: Compilation with Kotlin daemon fails after certain number of tries
• KT-55286 K2: Parcelize plugin sometimes can't find nested objects in current class
• KT-54500 Private type aliases can be referenced from public declarations, but are stripped by jvm-abi-gen

Tools. Compiler plugins. Serialization

• KT-56738 Unexpected SERIALIZER_NOT_FOUND when compiling against binary with enum
• KT-56990 “AssertionError: SyntheticAccessorLowering should not attempt to modify other files” in kotlinx-serialization using @Serializer and List argument
• KT-54441 Prohibit implicit serializer customization via companion object
• KT-49983 Implement prototype of kotlinx.serialization for K2 compiler
• KT-48733 “AssertionError: Unexpected IR element found during code generation” caused by Serialization and annotation with default parameter
• KT-54297 Regression in serializable classes with star projections

Tools. Gradle

New Features

• KT-54691 Kotlin Gradle Plugin libraries alignment platform
• KT-54492 Send gradle build errors from idea
• KT-55540 Add compilation speed metric in build reports
• KT-55541 Validate FUS metrics values on Gradle side

Performance Improvements

• KT-54836 Kotlin/JVM Gradle plugin creates task eagerly on Gradle 7.3+
• KT-55995 Add ability to perform precise compilation task outputs backup
• KT-54579 Kapt tasks slow down significantly on Windows when running with JDK 17 compared to JDK 11
• KT-54588 KotlinCompile: Avoid calling FileCollection.getFiles() multiple times

Fixes

• KT-57296 Build statistics sending errors in case of buildSrc directory usage with kotlin-dsl plugin applied
• KT-56645 Gradle: KGP reports an incorrect resources processing task name for JVM projects
• KT-55824 Deprecate commonMain.dependsOn(anything) in user scripts
• KT-56221 Gradle KTS: False positive Val cannot be reassigned when using an extension and its property with an implicit set operator
• KT-55452 Values of the compiler arguments set via KotlinCompile task configuration are duplicated by the KaptGenerateStubs task
• KT-55565 Consider de-duping or blocking standard addition of freeCompilerArgs to KaptGenerateStubsTask
• KT-55632 ‘The configuration :kotlinCompilerClasspath is both consumable and declarable’ messages are displayed in logs for different types of projects for KotlinCompile task with gradle 8
• KT-56414 Dependency locking and failed builds with Kotlin 1.8.10
• KT-52625 Compatibility with Gradle 7.4 release
• KT-55544 Gradle: add more debugging information for finding usages of kotlinOptions.freeCompilerArgs
• KT-52149 Gradle: declare shared build services usages with Task#usesService
• KT-55323 Gradle: allow to opt-out of reporting compiler arguments to a http statistics service
• KT-53811 Compatibility with Gradle 7.6 release
• KT-52998 Compatibility with Gradle 7.5 release
• KT-55741 Gradle 8: Build service ‘*’ is being used by task ‘*’ without the corresponding declaration via ‘Task#usesService’.
• KT-55174 KotlinCompile task produces deprecation “Build service ‘variant_impl_factories_...’ is being used by task”
• KT-54425 Kotlin Gradle Plugin should not use deprecated UsageContext#getUsage()
• KT-54998 “kotlin.gradle.performance” FUS collector reports data twice
• KT-55520 Add required configuration for Kotlin Gradle Plugin API reference publication
• KT-52963 Build report code breaks Gradle project isolation.
• KT-55164 KGP: “Cannot access project ‘:’ from project ‘:list’” JVM - Project Isolation with Multi Modules and Configuration Cache fails
• KT-52490 Gradle: [org.jetbrains.kotlin.gradle.testing.internal] TestReport.destinationDir and TestReport.reportOn deprecation warnings
• KT-55000 Include information about the new IC into “kotlin.gradle.performance” FUS collector
• KT-54941 Gradle, Daemon, MacOS M1: “Native integration is not available for Mac OS X aarch64” on first build
• KT-45748 Migrate all Kotlin Gradle plugin Android tests to new test setup
• KT-54029 Validate Binary Compatibility for kotlin-gradle-plugin-api

Tools. Gradle. Cocoapods

• KT-41830 CocoaPods integration: Support link-only mode for pods
• KT-55117 PodGenTask doesn't declare ouputs properly
• KT-55243 Gradle 7.6: Cocoapods plugin generates invalid podspec when applied in root project
• KT-56304 Podspec generated with new K/N artifact DSL contains wrong artifact names for static and dynamic libraries
• KT-56298 Assemble tasks for native binaries fail if more than one kotlin artifact is declared in one gradle project
• KT-55801 Deprecate useLibraries
• KT-55790 Improper sdk selected for watchosDeviceArm64 target

Tools. Gradle. JS

New Features

• KT-25878 Provide Option to Define Scoped NPM Package
• KT-37759 [Gradle, JS] Support arguments of command line for webpack and nodejs task
• KT-33518 Allow specifying command line args for node in nodejs or mocha tests
• KT-46163 KJS / Ktor: Support run on the next free port if default one is occupied

Performance Improvements

• KT-55476 KotlinWebpack should be cacheable
• KT-39108 Kotlin multiplatform plugin targeting js takes too long compared to the old kotlin-frontend plugin
• KT-45411 Investigate memory consumption in npm package
• KT-51376 KJS / Gradle: Dukat tasks make impact on build time even if there's no npm dependencies

Fixes

• KT-57285 KJS / Gradle / MPP: FileNotFoundException on publishing empty KJS sourceset
• KT-57068 KJS / Gradle: “Unable to find method ‘kotlin.gradle.targets.js.dsl.KotlinJsBrowserDsl.testTask’” after updating to 1.8.20-Beta
• KT-54445 KJS Remove dukat integration
• KT-56999 K/JS: KotlinJsIrLink::rootCacheDirectory property must be public
• KT-56765 K/JS: Several binaries use same cache directory
• KT-54529 KJS / IR: generate typescript definitions only on explicit Gradle action
• KT-56488 Debugger won't stop on breakpoints of JS browser test
• KT-56719 KJS / Gradle: Compile sync task has to sync only changed files
• KT-56131 KJS / Gradle: Could not create an instance of type org.jetbrains.kotlin.gradle.targets.js.subtargets.KotlinNodeJs when task configuration avoidance is broken
• KT-37668 Kotlin/JS: nodeTest failure due to main() function fail is reported as “BUILD SUCCESSFUL”
• KT-35285 Kotlin/JS + Gradle: browserDevelopementWebpack and browserProductionWebpack could write to different locations
• KT-55593 KotlinJsCompilerType and KotlinJsCompilerTypeHolder LEGACY and BOTH constants should be marked as @Deprecated in 1.8
• KT-33291 JS: No build result with gradle parallel build in multiproject build
• KT-40925 KJS: need a way to configure extra environment variables for the test task
• KT-47236 KJS: kotlinNpmInstall fails if no yarn is downloaded
• KT-53288 KJS / Gradle: FileNotFoundException when customising moduleName
• KT-54511 Kotlin/JS generated package.json main field is not correctly set if module name contains a / (slash)
• KT-54421 KJS / Legacy: Kotlin 1.7.20 fails when running tests on Node 14
• KT-54503 Make the target observer API public in kotlin JS Extension
• KT-54418 KJS: Change test running with kotlin-test adapter
• KT-54132 KJS IR: Sometimes karma failed on teamcity because of uninitialized browser

Tools. Gradle. Multiplatform

New Features

• KT-54766 TCS: external Android Target APIs: Milestone: Compile
• KT-50967 Make c-interop libs resolve robust to build clean
• KT-53570 multiplatform ‘natural hierarchy’ prototype

Fixes

• KT-36943 Gradle Plugin (multiplatform) - Consider publishing a ‘sourcesElements’ variant for the sources.jar
• KT-57460 Kotlin Gradle Plugin: Null this pointer in transformCommonMainDependenciesMetadata
• KT-57306 [Kotlin 1.8.20-RC] GradleException: Could not load the value of field apiConfiguration of org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.DefaultKotlinCompilationConfigurationsContainer
• KTIJ-23750 KotlinMppModelSerializationService is not invoked in production environment
• KTIJ-24223 Update latest tested KGP version to 1.9.0-dev-764
• KT-56536 Multiplatform: Composite build fails on included build with rootProject.name != buildIdentifier.name
• KTIJ-23889 TCS: Gradle Sync: Match sources.jar dependencies to sourceSetName scoped dependencies
• KT-56729 commonizeCInterop: Duplicated libraries: co.touchlab:sqliter-driver-cinterop-sqlite3
• KT-56510 Import with included plugin build may fail with OverlappingFileLockException during commonizeNativeDistribution
• KT-54180 TCS: Initial external Android Target APIs
• KT-55010 TCS: External Android Target Prototype: Setup Android dependencies
• KT-54783 KotlinJvmWithJavaCompilation mututal .all listener loop creates two compilations
• KT-54867 KotlinWithJavaCompilation does not respect javaSourceSet classpaths
• KT-52413 MPP: Gradle dependency substitution breaks KMP import for native targets
• KT-56115 Multiplatform;Composite Builds: Support import with cinterop commonization enabled
• KT-54312 TCS: Replace CompilationDetails abstract class hierarchy by composable implementation
• KT-47441 MPP: Unresolved reference for dependent on the other module with dependencySubstitution
• KT-56429 Fix flaky: MppIdeDependencyResolutionIT.test cinterops - are stored in root gradle folder
• KT-56337 Unable to import a project with cinterop with enableKgpDependencyResolution
• KT-55873 Unrequested dependencies leaking into common source sets: Regression after 703fd0f2
• KT-55891 Deprecate pre-HMPP flags
• KT-56278 TCS: Gradle Sync: [MISSING_DEPENDENCY_CLASS] on libraries used in shared native source sets
• KT-56143 CInteropDependencyConfiguration and CInteropApiElementsConfiguration are missing attributes defined on target
• KT-56285 TCS: Gradle Sync: IdeProjectToProjectCInteropDependencyResolver: Ensure lenient resolution
• KT-56204 KotlinTargetHierarchy: Changing naming from ‘any’ to ‘with’ prefix
• KT-56111 Multiplatform;Composite Builds: Clean builds fail on when ‘hostSpecificMetadata’ is required
• KT-54974 TCS: Gradle Sync: Implement IdeKotlinDependencyResolvers
• KT-38712 Gradle configuration's name with word “implementation” is camelcased to “İmplementation” if default locale is Turkish
• KT-54975 TCS: Gradle Sync: Implement stdlib-common filter for platform source sets
• KT-48839 Sources.jar of the root artifact of MPP library includes source files from test sourcesets
• KT-55492 TCS: Gradle Sync: Sources and Documentation as extra ‘classpath’
• KT-55237 TCS: Gradle Sync: Support stdlib-native sources
• KT-55475 TCS: Gradle Sync: Fine tune jvmAndAndroid source sets
• KT-55189 TCS: Gradle Sync: Support icons (native, js) and global libraries
• KT-55218 KotlinTargetHierarchy: Disambiguate declaring targets vs including targets
• KT-55112 TCS: Gradle Sync: Resolve Source Dependencies
• KT-54977 TCS: Gradle Sync: Implement debugging tools
• KT-54948 TCS: Gradle Sync: Port IdeaKpmPlatformDependencyResolver to TCS
• KT-55289 TCS: Gradle Sync: Prototypical sources jar resolution
• KT-55238 TCS: Gradle Sync: Support commonized native distribution
• KT-55230 Remove metadata dependencies transformation for runtimeOnly scope
• KT-53338 Prettify the message about incompatible AGP and KGP versions
• KT-55134 MPP / Gradle: Cannot read test tasks state
• KT-54506 Test tasks are considered up-to-date after a failure when triggered by allTests
• KTIJ-23509 Update latest tested KGP version to 1.8.20-dev-1815
• KT-54787 Test tasks are not up-to-date when an individual test task called after aggregating test task
• KT-54033 Multiplatform/Android Source Set Layout 1: Also support setting source dirs using AGP Apis
• KT-54202 CInterop Commonization fails on first run when native distribution is not yet commonizied
• KT-54135 Add documentation with examples to CompositeMetadataArtifact

Tools. Gradle. Native

• KT-37051 MPP Gradle plugin: duplicated cinterop libraries in composite build
• KT-55650 Pass through errors from Gradle to Xcode
• KT-56205 Shared Native Compilation: False positive ‘w: Could not find’ warnings on metadata klibs
• KT-54969 Support podspec generation for the new K/N artifact DSL

Tools. Incremental Compile

• KT-55021 New IC: “The following LookupSymbols are not yet converted to programSymbols” when removing/renaming file facades
• KTIJ-21161 Incremental build is taking too long when no files have changed in the project
• KT-53832 Enable new incremental compilation by default in Gradle
• KT-55622 MPP: Incremental compilation ignores changes in source set structure
• KT-55309 IC: Get rid of NonCachingLazyStorage
• KT-53402 Incremental compilation tries to compile resources
• KT-54791 Incremental compilation in JPS broken in 1.8.20-dev-1815

Tools. JPS

• KT-56165 Language version 1.9 and 2.0 is absent in Kotlin Compiler settings
• KT-51536 [JPS] Recompile module on facet settings change
• KT-53735 JPS / IC: “IOException: The system cannot find the file specified” on Windows
• KT-47983 [JPS] Adding compilerSettings to Facet should initiate rebuild of module
• KT-54449 Cyrillic characters in a filename break builds on linux

Tools. Kapt

New Features

• KT-53135 Enable JVM IR for KAPT stub generation by default
• KT-41129 kotlin-maven-plugin + kapt - allow aptMode to be set according to docs

Fixes

• KT-56635 KAPT / IR: "Unresolved reference: DaggerGeneratedCodeTest_AppComponent " caused by stub generation with Kotlin 1.8.20-Beta
• KT-56360 Kapt with JVM IR changes fields order
• KT-54380 Kapt / IR: Build failed when inheritance by functional interface with suspend modifier
• KT-54245 JVM IR / Kapt / Serialization: NullPointerException in SerializableIrGenerator.kt
• KT-33847 Kapt does not included Filer-generated class files on compilation classpath
• KT-55490 Kapt + JVM IR: “annotation @Foo is missing default values”
• KT-43786 KAPT: IllegalStateException: SimpleTypeImpl should not be created for error type: ErrorScope
• KT-43117 Kapt: “System is already defined in this compilation unit”
• KT-46966 Kapt: correctErrorTypes: receiver type is NonExistentClass
• KT-46965 Kapt: correctErrorTypes: custom setter gets Object parameter type
• KT-51087 KAPT: @JvmRepeatable annotations are present in inverse order in KAPT stubs
• KT-54870 KAPT stub generation with JVM_IR backend throws exception for delegated properties
• KT-44350 Kapt Gradle integration tests failing with Android Gradle plugin 7.0
• KT-54030 Kapt: annotation processor warnings are displayed as errors on JDK 17+
• KT-32596 kapt replaces class generated by annotation processor with error.NonExistentClass when the class is used as an annotation
• KT-37586 KAPT: When delegated property use an unknown type (to-be-generated class), correctTypeError will mess up the $delegate field type

Tools. Maven

• KT-56697 IC: “Incremental compilation was attempted but failed” Failed to get changed files: java.io.IOException: readPrevChunkAddress
• KT-55709 Maven: “java.lang.reflect.InaccessibleObjectException: Unable to make field protected java.io.OutputStream java.io.FilterOutputStream.out accessible”
• KT-29346 Add components.xml to automatically compile kotlin maven projects
• KT-13995 Maven: Kotlin compiler plugin should respect model's compile source roots
• KT-54822 Maven: Too low-level error message “Parameter specified as non-null is null: method kotlin.text.StringsKt__StringsJVMKt.startsWith, parameter ” from Kotlin Maven plugin invoking compiler when tags are empty
• KT-47110 Disable jdk8-specific warnings in kotlin-maven-plugin

Tools. Scripts

• KT-54095 It is difficult (if not impossible) to use kotlin compiler plugins with scripting
• KT-54461 Warnings and stack traces when executing scripts via kotlin-maven-plugin
• KT-54733 Scripts: ConcurrentModificationException in *.main.kts scripts
• KT-53283 Scripts: main-kts JAR does not relocate embedded SLF4J and jsoup libraries

1.8.0

Analysis API

• KT-50255 Analysis API: Implement standalone mode for the Analysis API

Analysis API. FIR

• KT-54292 Symbol Light classes: implement PsiVariable.computeConstantValue for light field
• KT-54293 Analysis API: fix constructor symbol creation when its accessed via type alias

Android

• KT-53342 TCS: New AndroidSourceSet layout for multiplatform
• KT-53013 Increase AGP compile version in KGP to 4.1.3
• KT-54013 Report error when using deprecated Kotlin Android Extensions compiler plugin
• KT-53709 MPP, Android SSL2: Conflicting warnings for androidTest/kotlin source set folder

Backend. Native. Debug

• KT-53561 Invalid LLVM module: “inlinable function call in a function with debug info must have a !dbg location”

Compiler

New Features

• KT-52817 Add @JvmSerializableLambda annotation to keep old behavior of non-invokedynamic lambdas
• KT-54460 Implementation of non-local break and continue
• KT-53916 Support Xcode 14 and new Objective-C frameworks in Kotlin/Native compiler
• KT-32208 Generate method annotations into bytecode for suspend lambdas (on invokeSuspend)
• KT-53438 Introduce a way to get SourceDebugExtension attribute value via JVMTI for profiler and coverage

Performance Improvements

• KT-53347 Get rid of excess allocations in parser
• KT-53689 JVM: Optimize equality on class literals
• KT-53119 Improve String Concatenation Lowering

Fixes

• KT-53465 Unnecessary checkcast to array of reified type is not optimized since Kotlin 1.6.20
• KT-49658 NI: False negative TYPE_MISMATCH on nullable type with when
• KT-48162 NON_VARARG_SPREAD isn't reported on *toTypedArray() call
• KT-43493 NI: False negative: no compilation error “Operator ‘==’ cannot be applied to ‘Long’ and ‘Int’” is reported in builder inference lambdas
• KT-54393 Change in behavior from 1.7.10 to 1.7.20 for java field override.
• KT-55357 IllegalStateException when reading a class that delegates to a Java class with a definitely-not-null type with a flexible upper bound
• KT-55068 Kotlin Gradle DSL: No mapping for symbol: VALUE_PARAMETER SCRIPT_IMPLICIT_RECEIVER on JVM IR backend
• KT-51284 SAM conversion doesn't work if method has context receivers
• KT-48532 Remove old JVM backend
• KT-55065 Kotlin Gradle DSL: Reflection cannot find class data for lambda, produced by JVM IR backend
• KT-53270 K1: implement synthetic Enum.entries property
• KT-52823 Cannot access class Thread.State after upgrading to 1.7 from 1.6.1 using -Xjdk-release=1.8
• KT-55108 IR interpreter: Error occurred while optimizing an expression: VARARG
• KT-53547 Missing fun IrBuilderWithScope.irFunctionReference
• KT-54884 “StackOverflowError: null” caused by Enum constant name in constructor of the same Enum constant
• KT-47475 “IncompatibleClassChangeError: disagree on InnerClasses attribute”: cross-module inlined WhenMappings has mismatched InnerClasses
• KT-55013 State checker use-after-free with XCode 14.1
• KT-54802 “VerifyError: Bad type on operand stack” for inline functions on arrays
• KT-54707 “VerifyError: Bad type on operand stack” in inline call chain on a nullable array value
• KT-48678 Coroutine debugger: disable “was optimised out” compiler feature
• KT-54745 Restore KtToken constructors without tokenId parameter to preserve back compatibility
• KT-54650 Binary incompatible ABI change in Kotlin 1.7.20
• KT-52786 Frontend / K2: IndexOutOfBoundsException when opting in to K2
• KT-54004 Builder type inference does not work correctly with variable assignment and breaks run-time
• KT-54581 JVM: “VerifyError: Bad type on operand stack” with generic inline function and when inside try-catch block
• KT-53794 IAE “Unknown visibility: protected/protected and package/” on callable reference to protected member of Java superclass
• KT-54600 NPE on passing nullable Kotlin lambda as Java's generic SAM interface with super type bound
• KT-54463 Delegating to a field with a platform type causes java.lang.NoSuchFieldError: value$delegate
• KT-54509 Ir Interpreter: unable to evaluate string concatenation with “this” as argument
• KT-54615 JVM: Internal error in file lowering: java.lang.AssertionError: Error occurred while optimizing an expression
• KT-53146 JVM IR: unnecessary checkcast of null leads to NoClassDefFoundError if the type isn't available at runtime
• KT-53712 Add mode to prevent generating JVM 1.8+ annotation targets (TYPE_USE, TYPE_PARAMETER)
• KT-54366 K2: no JVM BE specific diagnostics (in particular CONFLICTING_JVM_DECLARATIONS) in 1.8
• KT-35187 NullPointerException on compiling suspend inline fun with typealias to suspend function type
• KT-54275 K2: “IllegalArgumentException: KtParameter is not a subtype of class KtAnnotationEntry for factory REPEATED_ANNOTATION”
• KT-53656 “IllegalStateException: typeParameters == null for SimpleFunctionDescriptorImpl” with recursive generic type parameters
• KT-46727 Report warning on contravariant usages of star projected argument from Java
• KT-53197 K2: ‘init’ hides member of supertype ‘UIComponent’ and needs ‘override’ modifier
• KT-53867 K2: @JvmRecord does not compile to a java record
• KT-53964 K2 is unable to work with Java records
• KT-53349 K2: TYPE_MISMATCH caused by non-local return
• KT-54100 “Type variable TypeVariable(P) should not be fixed” crash in code with errors
• KT-54212 K2: cannot calculate implicit property type
• KT-53699 K2: Exception during IR lowering in code with coroutines
• KT-54192 Warn about unsupported feature on generic inline class parameters
• KT-53723 Friend modules aren't getting passed to cache build during box tests
• KT-53873 K2: Duplicated diagnostics reported from user type ref checkers
• KT-50909 “VerifyError: Bad type on operand stack” caused by smartcasting for nullable inline class property in class
• KT-54115 Restore Psi2IrTranslator constructor from 1.7.20
• KT-53908 K2: Self-referencing generics in Java class causes New Inference Error (IE: class Foo<T extends Foo>)
• KT-53193 K2: compile error on project that compiles fine with normal 1.7.10
• KT-54062 K2 Invalid serialization for type-aliased suspend function type with extension receiver
• KT-53953 Forbid usages of super or super if in fact it accesses an abstract member
• KT-47473 NI: Missed UPPER_BOUND_VIOLATED diagnostics if use type aliases with type parameters
• KT-54049 K2: false positive MANY_IMPL_MEMBER_NOT_IMPLEMENTED
• KT-30054 Wrong approximation if nullable anonymous object with implemented interface is used
• KT-53751 Postpone IgnoreNullabilityForErasedValueParameters feature
• KT-53324 Implement Enum.entries lowering on K/N
• KT-44441 K2: report redeclaration error if there is a Java class with the same name as the Kotlin class
• KT-53807 No warning about declaringClass on an enum value
• KT-53493 K2: val on function parameter counts as just warning
• KT-53435 K2: “IllegalArgumentException: class KtValueArgument is not a subtype of class KtExpression for factory ANNOTATION_ARGUMENT_MUST_BE_CONST” if string in nested annotation is concatenated
• KT-52927 AssertionError: LambdaKotlinCallArgumentImpl
• KT-53922 Make Enum.entries unstable feature to poison binaries
• KT-53783 Exception during psi2ir when declaring expect data object
• KT-53622 [OVERLOAD_RESOLUTION_AMBIGUITY] when enum entry called ‘entries’ is present in K2
• KT-41670 JVM IR: AbstractMethodError when using inheritance for fun interfaces
• KT-53178 K2: implement diagnostics for serialization plugin
• KT-53804 Restore old and incorrect logic of generating InnerClasses attributes for kotlin-stdlib
• KT-52970 Default value constant in companion object works on JVM and JS, but fails on native
• KT-51114 FIR: Support DNN checks
• KT-27936 Write InnerClasses attribute for all class names used in a class file
• KT-53719 Parsing regression on function call with type arguments and labeled lambda
• KT-53261 Evaluate effect from inline for primitive types
• KT-53706 K2: Context receivers are not resolved on properties during type resolution stage
• KT-39492 Kotlin.Metadata's packageName field cannot be an empty string
• KT-53664 Ir Interpreter: unable to evaluate name of function reference marked with JvmStatic from another module
• KT-52478 [Native] Partial linkage: Building native binary from cached KLIBs fails if one library depends on removed nested callable member from another one
• KT-48822 CompilationException: Back-end (JVM) Internal error: Failed to generate expression: KtProperty - ConcurrentModificationException
• KT-50281 IllegalStateException: unsupported call of reified inlined function
• KT-50083 Different error messages in android and JVM (Intrinsics.checkNotNullParameter).
• KT-53236 Support Enum.entries codegen on JVM/IR BE
• KT-41017 FIR: should we support smartcast after null check
• KT-53202 “ISE: Descriptor can be left only if it is last” after direct invoke optimization on a capturing lambda
• KT-46969 @BuilderInference with nested DSL scopes cause false-positive scope violation in Kotlin 1.5
• KT-53257 FIR: Improper context receiver argument is chosen when there are two extension receiver candidates
• KT-53090 Anonymous function and extension function literals are generated as classes even with -Xlambdas=indy
• KT-53208 K2: Cannot get annotation for default interface method parameter when compiled with -Xuse-k2
• KT-53184 K2: NoSuchMethodError on KProperty1.get() referenced via nullable typealias
• KT-53198 K2: Return type mismatch: expected kotlin/Unit, actual kotlin/Unit?
• KT-53100 Optimization needed: (CONSTANT_PRIMITIVE(x: T?)) => x
• KT-49875 [FIR] Support infering PRIVATE_TO_THIS visibility
• KT-53024 Refactor FIR renderer to composable architecture
• KT-50995 [FIR] Support SAM with receiver plugin
• KT-53148 K1: introduce warning for inline virtual member in enum
• KT-49847 Devirtualization fails to eliminate boxing in function reference context
• KT-52875 Extension function literal creation with -Xlambdas=indy fails with incorrect arguments
• KT-53072 INVALID_IF_AS_EXPRESSION error isn't shown in the IDE (LV 1.8)
• KT-52985 Native: a function with type T? returned a kotlin.Unit instead of null
• KT-52020 FIR warning message includes internal rendering
• KT-48778 -Xtype-enhancement-improvements-strict-mode not respecting @NonNull annotation for property accesses?

IDE

Fixes

• KTIJ-22357 CCE “class org.jetbrains.kotlin.fir.types.impl.FirImplicitTypeRefImpl cannot be cast to class org.jetbrains.kotlin.fir.types.FirResolvedTypeRef” in K2
• KT-55150 Argument for @NotNull parameter ‘scope’ of org/jetbrains/kotlin/resolve/AnnotationResolverImpl.resolveAnnotationType must not be null
• KTIJ-22165 IDE notification to promote users to migrate to the new Kotlin/JS toolchain
• KTIJ-22166 IDE notification (or something else) about JPS and Maven support for Kotlin/JS is deprecated
• KT-53543 Rework light classes for file facade
• KT-48773 Investigate the possibility of removing dependency on old JVM backend in light classes
• KTIJ-19699 IDE: False positive type mismatch in Java code for Kotlin nested class non-direct inheritor from external library
• KT-51101 FIR IDE: Exception on “Show Type Info” action
• KTIJ-22295 MPP, IDE: False positive UPPER_BOUND_VIOLATED when JVM module implements the generic interface from MPP module and the type parameter is not equal to itself.
• KT-51656 FIR IDE: ProgressCancelled exception is masked in the compiler during resolve
• KT-51315 FIR IDE: move out base modules from fe10 plugin to reuse in k2 plugin
• KTIJ-22323 K2: ISE during resolve of stdlib calls from the stdlib
• KTIJ-21391 Generate -> Override methods : don't delegate to abstract methods
• KT-53097 Extract common part of light classes to another module
• KTIJ-22354 FIR LC: annotation owner is always null
• KTIJ-22157 Kotlin call resolver leaks user code when reporting exception

IDE. Completion

• KTIJ-22552 Kotlin: ‘for loop’ postfix completion doesn't work - “Fe10SuggestVariableNameMacro must be not requested from main classloader”
• KTIJ-22503 Support code completion for data objects

IDE. Debugger

• KT-51755 Compilation exception with scripting compilation during debug session
• KTIJ-21963 Debugger / IR: Expression evaluation of the debugger doesn't work

IDE. Decompiler, Indexing, Stubs

• KTIJ-22750 Initialize Kotlin stub element types lazily
• KTIJ-18094 IDE: “AssertionError: Stub count doesn't match stubbed node length” with minified Android AAR library
• KTIJ-17632 IndexOutOfBoundsException: Cannot decompile a class located in minified AAR

IDE. Gradle Integration

• KT-48135 In the IDE import, reuse dependency granular source set KLIBs across multi-project build to avoid duplicate external libraries
• KTIJ-22345 False positive unresolved reference for members of subclasses of expect classes.
• KT-53514 HMPP: False positive for None of the following functions can be called with the arguments supplied. with Enum in common module
• KT-51583 Gradle 7.4+ | SamplesVariantRule interference: Could not resolve all files for configuration ‘:kotlinKlibCommonizerClasspath’
• KTIJ-21077 Dependency matrix does not work with Jetpack compose / multiplatform projects

IDE. Inspections and Intentions

• KTIJ-19531 Adapt changes about new rules for method implementation requirements
• KTIJ-22087 Support IDE inspections for upcoming data objects
• KTIJ-20510 Quick fix to implement and call correct super method in case of inheritance with defaults
• KTIJ-20170 Provide quickfix for deprecated resolution to private constructor of sealed class
• KTIJ-22630 FIR IDE: Lazy resolve exception after invocation of Override members action on value class
• KT-49643 Intentions: “Implement members” fails when base type function declaration uses unresolved generic types

IDE. JS

• KTIJ-22167 Make JS IR default in projects created by wizard
• KTIJ-22332 Wizard: Kotlin/JS projects: cssSupport DSL should be updated

IDE. KDoc

• KTIJ-22324 K2 IDE: implement reference resolve inside KDocs

IDE. Multiplatform

• KTIJ-19566 New Project Wizard: Update HMPP-related flags in multiplatform wizards

IDE. Navigation

• KT-51314 FIR IDE: show Kotlin declarations in search symbol
• KTIJ-22755 Find usage for constructor from kotlin library doesn't work for secondary constructor usages

IDE. Script

• KTIJ-22598 Add warning for standalone scripts in source roots
• KT-54325 .settings.gradle.kts and .init.gradle.kts are reported as standalone scripts

IDE. Structural Search

• KTIJ-21986 KSSR: “CodeFragment with non-kotlin context should have fakeContextForJavaFile set: originalContext = null” warning shows up when replacing

IDE. Tests Support

• KT-50269 FIR IDE: Allow running tests via gutter

IDE. Wizards

• KTIJ-23537 Wizard: projects with Android modules require higher sdkCompileVersion
• KTIJ-23525 Wizard: Compose multiplatform: project won't build and require higher compileSdkVersion
• KTIJ-22763 New Project Wizard: remove deprecated Android extensions plugin from Android target in the project constructor
• KTIJ-22481 Wizard: Kotlin -> Browser application (gradle groove). Build error

JavaScript

Fixes

• KT-55097 KJS / IR + IC: Using an internal function from a friend module throws an unbound symbol exception
• KT-54406 Kotlin/JS: build with dependencies fails with “Could not find “kotlin” in [~/.local/share/kotlin/daemon]”
• KT-53074 Make JS IR BE default in toolchain (gradle & CLI)
• KT-50589 UTF-8 Instability in kotlin.js.map
• KT-54934 KJS / IR + IC: Suspend abstract function stubs are generated with unstable lowered ic signatures
• KT-54895 KJS / IR + IC: broken cross module references for function default param wrappers
• KT-54520 KJS / IR Allow IdSignature clashes
• KT-54120 JS IR + IC: pointless invalidation of dependent code after modifying companions
• KT-53986 KJS / IR + IC: compiler produces different JS file names with IC and without IC
• KT-54010 JS IR + IC: Force IC cache invalidation after updating language version or features
• KT-53931 KJS / Gradle: Regression with 1.7.20-RC: ReferenceError: println is not defined
• KT-53968 Kotlin/JS: no UninitializedPropertyAccessException on access to non-initialized lateinit property defined in dependencies
• KT-54686 KJS / IR: Incorrect generation of signatures when one of argument is nested class
• KT-54479 KJS / IR + IC: Adding or removing companion fields leads java.lang.IllegalStateException in the compiler IC infrastructure
• KT-54382 KJS / IR: Wrong type check for inheritors of suspend functions
• KT-54323 KJS / IR + IC: Intrinsics from stdlib may lose their dependencies in incremental rebuild
• KT-53361 KJS / IR: No debug info is generated for in-line js code
• KT-53321 Implement Enum.entries lowering on JS/IR
• KT-53112 KJS IR turn on IC infra by default
• KT-50503 Kotlin/JS: IR + IC: compileTestDevelopmentExecutableKotlinJs fails with ISE: “Could not find library” after removing module dependency
• KT-54011 JS IR + IC: EnumEntries don't work well when IC is enabled
• KT-53672 KJS / IR: “IndexOutOfBoundsException: Index 0 out of bounds for length 0” caused by function reference to extension function of reified type variable
• KT-43455 KJS: IR. Incremental compilation problem with unbound symbols
• KT-53539 KJS: Exported class inherited non-exported class shows warning
• KT-53443 KJS/IR: NullPointerException caused by anonymous objects inside lambdas
• KT-52795 K/JS and K/Native IR-validation/compilation errors for a valid kotlin code
• KT-52805 KJS/IR: Invalid call of inline function in also block
• KT-51151 KJS / IR: Wrong overloaded generic method with receiver is called
• KT-52830 KJS/IR: Sourcemap disabling doesn't work
• KT-52968 KJS / IR: Buggy generation of overridden methods
• KT-53063 KJS / IR + IC: undefined cross module reference for implemented interface functions
• KT-51099 KJS / IR + IC: Cache invalidation doesn't check generic class variance annotations (in, out)
• KT-51090 KJS / IR + IC: Cache invalidation doesn't check suspend qualifier
• KT-51088 KJS / IR + IC: Cache invalidation doesn't check class qualifiers (data, inline)
• KT-51083 KJS / IR + IC: Cache invalidation doesn't check inline function which was non inline initially
• KT-51896 KJS / IR + IC: Cache invalidation doesn't trigger rebuild for fake overridden inline functions

Language Design

• KT-48385 Deprecate confusing grammar in when-with-subject
• KT-48516 Forbid @Synchronized annotation on suspend functions
• KT-41886 Ability to require opt-in for interface implementation, but not for usage
• KT-34943 OVERLOAD_RESOLUTION_AMBIGUITY inconsistent with the equivalent Java code
• KT-51334 Implement type-bound label this@Type

Libraries

New Features

• KT-21007 Provide Kotlin OSGI Bundle with extensions for JRE8 (and JRE7)
• KT-54082 Comparable and subtractible TimeMarks
• KT-52928 Provide copyToRecursively and deleteRecursively extension functions for java.nio.file.Path
• KT-49425 Update OptIn documentation to reflect latest design changes
• KT-54005 Allow calling declaringJavaClass on Enum
• KT-52933 rangeUntil members in built-in types

Performance Improvements

• KT-53508 Cache typeOf-related KType instances when kotlin-reflect is used

Fixes

• KT-51907 Switch JVM target of the standard libraries to 1.8
• KT-54835 Document that Iterable.all(emptyCollection) returns TRUE.
• KT-54168 Expand on natural order in comparator docs
• KT-53277 Stabilize experimental API for 1.8
• KT-53864 Review deprecations in stdlib for 1.8
• KT-47707 Remove the system property and the brittle contains optimization code itself
• KT-52336 Different behavior on JVM and Native in stringBuilder.append(charArray, 0, 1)
• KT-53927 Remove deprecation from ConcurrentModificationException constructors
• KT-53152 Introduce EnumEntries to stdlib as backing implementation of Enum.entries
• KT-53134 stdlib > object Charsets > not thread safe lazy initialization
• KT-51063 Gradle project with JPS runner: “JUnitException: Failed to parse version” JUnit runner internal error with JUnit
• KT-52908 Native: setUnhandledExceptionHook swallows exceptions

Native

• KT-51043 Kotlin Native: ObjC-Interop: kotlin.ClassCastException: null cannot be cast to kotlin.Function2
• KT-50786 Native: prohibit suspend calls inside autoreleasepool {}
• KT-52834 Implement test infrastructure for K2/Native

Native. C Export

• KT-36878 Reverse C Interop: incorrect headers generation for primitive unassigned type arrays
• KT-53599 [Reverse C Interop] Provide box/unbox API for unsigned primitive types
• KT-41904 Kotlin/Native : error: duplicate member for interface and function with the same name
• KT-42830 [Reverse C Interop] Add API to get value of boxed primitives
• KT-39496 K/N C: optional unsigned types as function parameters crash the compiler
• KT-39015 Cannot compile native library with nullable inline class

Native. C and ObjC Import

• KT-54738 Cocoapods cinterop: linking platform.CoreGraphics package
• KT-54001 Kotlin/Native: support header exclusion in cinterop def files
• KT-53151 Native: Custom declarations in .def don't work with modules, only headers

Native. ObjC Export

• KT-53680 Obj-C refinement annotations
• KT-54119 Native: runtime assertion failed due to missing thread state switch
• KT-42641 Don't export generated component* methods from Kotlin data classes to Obj-C header

Native. Platform Libraries

• KT-54225 Native: update to Xcode 14.1
• KT-54164 Native: commonizer fails on CoreFoundation types
• KT-39747 Why is there no WinHttp API in Kotlin/Native's Windows API?

Native. Runtime

• KT-49228 Kotlin/Native: Allow to unset unhandled exception hook
• KT-27305 Fix FILE macro inside RuntimeCheck and RuntimeAssert

Native. Runtime. Memory

• KT-54498 Deprecation message of ‘FreezingIsDeprecated’ is not really helpful
• KT-53182 New memory manager: Unexpected memory usage on IOS

Native. Stdlib

• KT-52429 Small Usability Improvements for Worker API

Reflection

• KT-54629 Incorrectly cached class classifier
• KT-54611 KTypeImpl does not take into account class loader from the classifier property
• KT-48136 Make Reflection.getOrCreateKotlinPackage use cache when kotlin-reflect is used
• KT-50705 Use ClassValue to cache KClass objects in kotlin-reflect
• KT-53454 Properly cache the same class‘s KClass when it’s loaded by multiple classloaders in getOrCreateKotlinClass

Specification

• KT-54210 Update Kotlin specification to mention that since 1.8 generics in value classes are allowed

Tools. CLI

• KT-54116 Add JVM target bytecode version 19
• KT-53278 Support values 6 and 8 for -Xjdk-release
• KT-46312 CLI: Kotlin runner should use platform class loader to load JDK modules on Java 9+

Tools. Commonizer

• KT-54310 Commonizer fails on 1.8.0-dev K/N distributions
• KT-48576 [Commonizer] platform.posix.pselect not commonized in Ktor

Tools. Compiler Plugins

• KT-46959 Kotlin Lombok: Support generated builders (@Builder)
• KT-53683 Unresolved reference compilation error occurs if a file is annotated with @ Singular and has any guava collection type : ImmutableTable, ImmutableList or else
• KT-53657 [K2] Unresolved reference compilation error occurs if a field is annotated with @ Singular and has type NavigableMap without explicit types specification
• KT-53647 [K2] Unresolved reference compilation error occurs if a field is annotated with @ Singular and has type Iterable<>
• KT-53724 Param of the @ Singular lombok annotation ignoreNullCollections=true is ignored by kotlin compiler
• KT-53451 [K2] References to methods generated by @ With lombok annotation can't be resolved with enabled K2 compiler
• KT-53721 [K2] There is no compilation error while trying to add null as a param of the field with non-null type
• KT-53370 Kotlin Lombok compiler plugin can't resolve methods generated for java boolean fields annotated with @ With annotation

Tools. Compiler plugins. Serialization

• KT-54878 JVM/IR: java.lang.ClassCastException: class org.jetbrains.kotlin.ir.types.impl.IrStarProjectionImpl cannot be cast to class org.jetbrains.kotlin.ir.types.IrTypeProjection on serializer<Box<*>>()
• KT-55340 Argument for kotlinx.serialization.UseSerializers does not implement KSerializer or does not provide serializer for concrete type
• KT-55296 Improve exceptions in serialization plugin
• KT-55180 KJS: regression in serialization for Kotlin 1.8.0-beta
• KT-53157 Recursion detected in a lazy value under LockBasedStorageManager in kotlinx.serialization
• KT-54297 Regression in serializable classes with star projections
• KT-49660 kotlinx.serialization: IndexOutOfBoundsException for parameterized sealed class
• KT-43910 JS IR: Serialization with base class: “IndexOutOfBoundsException: Index 0 out of bounds for length 0”

Tools. Daemon

• KT-52622 Kotlin/JS, Kotlin/Common compilations start Kotlin daemon incompatible with Kotlin/JVM compilation on JDK 8

Tools. Gradle

New Features

• KT-27301 Expose compiler flags via Gradle lazy properties
• KT-53357 Change single build metrics property
• KT-50673 Gradle: KotlinCompile task(s) should use @NormalizeLineEndings
• KT-34464 Kotlin build report path not clickable in the IDE

Performance Improvements

• KT-51525 [Gradle] Optimize evaluating args for compile tasks
• KT-52520 Remove usage of reflection from CompilerArgumentsGradleInput

Fixes

• KT-48843 Add ability to disable Kotlin daemon fallback strategy
• KT-55334 kaptGenerateStubs passes wrong android variant module names to compiler
• KT-55255 Gradle: stdlib version alignment fails build on dynamic stdlib version.
• KT-55363 [K1.8.0-Beta] Command line parsing treats plugin parameters as source files
• KT-54993 Raise kotlin.jvm.target.validation.mode check default level to error when build is running on Gradle 8+
• KT-54136 Duplicated classes cause build failure if a dependency to kotlin-stdlib specified in an android project
• KT-50115 Setting toolchain via Java extension does not configure ‘kotlinOptions.jvmTarget’ value when Kotlin compilation tasks are created eagerly
• KT-55222 Migrate AndroidDependencyResolver to the new Gradle API
• KT-55119 There is no validation for different jvmTarget and targetCompatibility values in multiplatform projects with jvm target and used java sources
• KT-55102 Compile java task fails with different target version in pure kotlin project
• KT-54995 [1.8.0-Beta] compileAppleMainKotlinMetadata fails on default parameters with No value passed for parameter 'mustExist'
• KT-35003 Automatically set targetCompatibility for kotlin-jvm projects to work with gradle 6 metadata
• KT-45335 kotlinOptions.jvmTarget conflicts with Gradle variants
• KT-48798 Android: going from one to more than one productFlavor causes inputs of commonSourceSet$kotlin_gradle_plugin property of compileKotlin task to change
• KT-55019 Gradle sync: UnknownConfigurationException when adding implementation dependencies to a Kotlin with Java compilation
• KT-55004 jvmTarget value is ignored by depending modules if a task “UsesKotlinJavaToolchain” is configured for all project modules using allProjects {}
• KT-54888 Add Gradle property to suppress kotlinOptions.freeCompilerArgs modification on execution phase
• KT-54399 Undeprecate ‘kotlinOptions’ DSL
• KT-54306 Change the naming of newly added Compiler*Options classes and interfaces
• KT-54580 KotlinOptions in AbstractKotlinCompilation class are deprecated
• KT-54653 java.lang.NoClassDefFoundError: kotlin/jdk7/AutoCloseableKt exception if a dependency to the kotlin-stdlib is added
• KT-52624 Compatibility with Gradle 7.3 release
• KT-54703 Stdlib substitution does not work with JPMS modules
• KT-54602 Prevent leaking Gradle Compile DSL types into compiler cli runtime
• KT-54439 Project failed to sync Native LaguageSettings to compiler options in afterEvaluate
• KT-53885 Bump minimal supported Gradle version to 6.8.3
• KT-53773 Protect and system properties can contain sensitive data
• KT-53732 Add custom values limits for build scan reports
• KT-52623 Compatibility with Gradle 7.2. release
• KT-51831 Gradle: remove kotlin.compiler.execution.strategy system property
• KT-51679 Change deprecation level to error for KotlinCompile setClasspath/getClasspath methods
• KT-54335 Kotlin build report configuration. There is no validation for SINGLE_FILE output if the required kotlin.build.report.single_file property is empty or absent
• KT-54356 Kotlin build report configuration. Wrong path is used for the property kotlin.internal.single.build.metrics.file
• KT-53617 KotlinCompilerExecutionStrategy value is ignored by depending modules if configure once for all project modules using allProjects {}
• KT-53823 Kotlin Gradle Plugin uses deprecated Gradle API: Provider.forUseAtConfigurationTime()
• KT-54142 Increase Kotlin Gradle plugin Gradle target API to 7.5
• KT-50161 Android variant filter breaks KotlinCompile cache compatibility
• KT-54113 LanguageSettings to KotlinNativeLink.toolOptions sync are executed on the wrong context
• KT-53830 Versions of kotlin-stdlib-jdk8 and kotlin-stdlib-jdk7 aren't overrided if added as transitive dependencies to kotlin-stdlib
• KT-54112 Missing target input on KotlinNativeLink task
• KT-45879 Documentation: Wrong kotlin languageVersion “1.6 (EXPERIMENTAL)”
• KT-54103 Remove JvmTarget.JVM_1_6 from generated Gradle compiler type
• KT-52959 KMP code is breaking Gradle project isolation
• KT-50598 MULTIPLE_KOTLIN_PLUGINS_SPECIFIC_PROJECTS_WARNING is only shown on first build
• KT-53246 Gradle: Special characters in paths of errors and warnings should be escaped
• KT-47730 How to avoid stdlib coming from Kotlin gradle plugin
• KT-52209 Corrupted cache and non-incremental build if produce caches “in process” and restore then compiling with kotlin daemon
• KT-41642 “TaskDependencyResolveException: Could not determine the dependencies” when trying to apply stdlib
• KT-53390 Drop usage of -Xjava-source-roots when passing java sources required for Kotlin compilation
• KT-52984 Kotlin Gradle plugin is misbehaving by resolving DomainObjectCollection early
• KT-38622 Non-incremental compilation because of R.jar with Android Gradle plugin 3.6
• KT-38576 AnalysisResult.RetryWithAdditionalRoots crashes during incremental compilation with java classes in classpath

Tools. Gradle. Cocoapods

• KT-54314 Cocoapods: Signing pod dependency for Xcode 14
• KT-54060 Xcode 14: disable bitcode embedding for Apple frameworks
• KT-53340 Change default linking type for frameworks registered by cocoapods plugin
• KT-53392 Deprecate and delete downloading pod dependencies by direct link
• KT-53695 Build of macOS application fails if a framework is integrated via Cocoapods plugin

Tools. Gradle. JS

• KT-53367 KJS: Migrate cssSupport API
• KT-45789 KJS / IR: Transitive NPM dependencies are not included in PublicPackageJsonTask output
• KT-55099 K/JS: Second declaration of JS target without compiler type report warning incorrectly
• KT-52951 [KGP/JS] Browser test target registration via properties
• KT-52950 KJS: Report if yarn.lock was updated during built
• KT-53374 KJS / Gradle: Implement IDEA sync detection logic via ValueSource to improve configuration cache support
• KT-53381 Kotlin/JS: with erased kotlin-js-store/ and reportNewYarnLock = true the task kotlinUpgradeYarnLock always fails
• KT-53788 KJS / Gradle: Disable Gradle build cache for KotlinJsDce when development mode is enabled
• KT-53614 Kotlin/JS upgrade npm dependencies

Tools. Gradle. Multiplatform

New Features

• KT-53396 Support ‘implementation platform()’ by gradle kotlin mpp plugin for JVM target
• KT-40489 MPP / Gradle: support BOM (enforcedPlatform) artifacts in source set dependencies DSL

Performance Improvements

• KT-52726 [MPP] Optimize caching/performance/call-sites of ‘compilationsBySourceSets’

Fixes

• KT-54634 MPP: Test Failure causes: KotlinJvmTest$Executor$execute$1 does not define failure
• KT-35916 Gradle MPP plugin: Configurations for a main compilation and its default source set have different naming
• KT-46960 Repeated kotlin/native external libraries in project
• KT-27292 MPP: jvm { withJava() }: Gradle build: Java source under Kotlin root is resolved while building, but does not produce output class files
• KT-34650 Naming clash in MPP+Android: androidTest vs androidAndroidTest
• KT-54387 Remove MPP alpha stability warning
• KT-31468 Targets disambiguation doesn't work if a depending multiplatform module uses withJava() mode
• KT-54090 Take an Apple test device from the device list
• KT-54301 KotlinToolingVersionOrNull: IllegalArgumentException
• KT-53256 Implement K/N compiler downloading for KPM
• KT-45412 KotlinCompilation: Make sure .kotlinSourceSets and .allKotlinSourceSets include the default source set
• KT-49202 Tests on android target can't be executed in multiplatform project if dependency to kotlin-test framework is provided as a single dependency and tests configured to be executed via Junit5

Tools. Gradle. Native

New Features

• KT-43293 Support Gradle configuration caching with Kotlin/Native
• KT-53107 Add arm64 support for watchOS targets (Xcode 14)

Fixes

• KT-53704 Native cinterop: eager header path calculation
• KT-54814 Kotlin/Native: Github Actions: Testing watchOSX64 with Xcode 14 — Invalid device: Apple Watch Series 5
• KT-54627 Native: :commonizeNativeDistribution with configuration cache enabled fails even when set to warn on JDK 17
• KT-54339 Link tasks fail if Gradle Configuration Cache is enabled
• KT-53191 Native cinterop sync problem with gradle
• KT-54583 watchosDeviceArm64 target shouldn't register test tasks
• KT-52303 Gradle / Native: Build tasks ignore project.buildDir
• KT-54442 Gradle iOS test tasks fail if a device is not selected explicitly
• KT-54177 Gradle: Deprecate enableEndorsedLibs flag
• KT-47355 Support macos target for FatFramework task
• KT-53339 MPP / CocoaPods: The static framework fails to install on a real iOS device
• KT-31573 Missing description for Native Gradle tasks
• KT-53131 Gradle Sync: “NoSuchElementException: Array contains no element matching the predicate” with CocoaPods
• KT-53686 Task assembleReleaseXCFramework fails with “error: the path does not point to a valid framework” if project name contains a dash

Tools. Incremental Compile

• KT-54144 New IC: “IllegalStateException: The following LookupSymbols are not yet converted to ProgramSymbols” when changing an inline function with custom JvmName
• KT-53871 New IC: “IllegalStateException: The following LookupSymbols are not yet converted to ProgramSymbols” when changing an inline property accessor
• KT-19804 Relocatable IC caches

Tools. JPS

• KT-45474 False positive NO_ELSE_IN_WHEN on sealed class with incremental compilation
• KT-54228 Switching abstract to sealed classes causes incremental issue
• KT-38483 JPS: Stopping compilation causes IDE CompilationCanceledException
• KT-50310 False positive NO_ELSE_IN_WHEN on incremental build when adding sealed classes
• KT-48813 Move cache version to compiler
• KTIJ-921 JPS: FileNotFoundException on project build in mixed Kotlin/Scala project

Tools. Kapt

• KT-54187 JVM IR + kapt: incorrect modifier final is generated for nested enum in interface
• KT-48827 Remove ‘kapt.use.worker.api’ property

Tools. Scripts

• KT-54355 Scripts: Internal compiler error (languageVersion=1.9)
• KT-53009 Scripting: NDFDE “Descriptor wasn't found for declaration SCRIPT” on using script definition with kotlin from master

Recent ChangeLogs:

ChangeLog-1.7.X

ChangeLog-1.6.X

ChangeLog-1.5.X

ChangeLog-1.4.X

ChangeLog-1.3.X

ChangeLog-1.2.X

ChangeLog-1.1.X

ChangeLog-1.0.X