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

Recent ChangeLogs:

ChangeLog-1.8.X

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