Kotlin 1.6.20-M1

Changelog

Compiler

New Features

• KT-48217 Add an annotation JvmDefaultWithCompatibility to allow generating DefaultImpls classes if -Xjvm-default=all option is used
• KT-49857 Require Xcode 13 for building Kotlin/Native compiler
• KT-47701 Support instantiation of annotation classes on Native
• KT-46085 Support experimental parallel compilation of a single module in the JVM backend
• KT-46603 Generate SAM-conversions to Java interfaces extending 'java.io.Serializable' as serializable using java.lang.invoke.LambdaMetafactory

Performance Improvements

• KT-50156 HMPP: Slow frontend/ide performance in OKIO (ExpectActualDeclarationChecker)
• KT-50073 Performance regression in adapted function references
• KT-50076 Performance regression in super call to an interface member in $DefaultImpls
• KT-50080 Performance regression in string template with generic property with primitive upper bound
• KT-50084 Performance regression in concatenation with 'String?'
• KT-50078 Performance regression in for-in-array loop
• KT-50039 Performance regression in inner class constructor call with default parameters
• KT-48784 An anonymous class has fields for variables that are only used in the constructor
• KT-42010 Generate IINC instruction for postfix increment in JVM_IR
• KT-48433 JVM_IR don't generate null check on 'this$0' parameter of inner class constructor
• KT-48435 JVM_IR ConstForLoopBenchmark performance regression
• KT-48507 JVM_IR ForLoopBenchmark regressions
• KT-48640 Performance regression in 'longDownToLoop' benchmarks
• KT-29822 Generate specialized bytecode for loops withIndex over unsigned arrays
• KT-48669 Generate optimizable counter loop for loops over indices of unsigned arrays
• KT-49444 Possible performance degradation with UInt downTo loop
• KT-48944 Possible performance regression with comparison of local KFunctions
• KT-17111 Eliminate redundant store/load instructions when the value stored is simple
• KT-36837 Generate more compact code for for-in-range loop in JVM_IR
• KT-48947 JVM / IR Possible performance regression with string templates
• KT-48931 JVM / IR: Performance degradation with string concatenation
• KT-36654 Generate more compact bytecode for safe call in JVM_IR

Fixes

• KT-48544 JVM / IR: "UnsupportedOperationException: Unknown structure of ADAPTER_FOR_CALLABLE_REFERENCE" with callable reference ::arrayOf
• KT-49658 NI: False negative TYPE_MISMATCH on nullable type with when
• KT-50978 [Native] Error while building static cache: NoSuchElementException at IrTypeInlineClassesSupport.getInlinedClassUnderlyingType(InlineClasses.kt:341)
• KT-50977 [Native] Error while building static cache: IllegalStateException: Class CLASS ENUM_ENTRY is not found at KonanIrlinkerKt.findClass(KonanIrlinker.kt:229)
• KT-50976 [Native] Error while building static cache: IllegalStateException: No descriptor found at DescriptorByIdSignatureFinder.findDescriptorForPublicSignature(DescriptorByIdSignatureFinder.kt:157)
• KT-51080 Line number in mapping for the first instruction is lost
• KT-49526 JVM IR: Function reference with non-denotable intersection type argument is not inlined and is incorrectly approximated
• KT-50399 Error: unexpected variance in super type argument: out @0
• KT-50649 JVM IR: ClassCastException when returning Result as generic type
• KT-50617 JVM IR: java.lang.IndexOutOfBoundsException "Empty list doesn't contain element at index 0" when class and interface have the same name and extension function is used
• KT-45693 False negative INCOMPATIBLE_TYPES with when with generic subject
• KT-50797 Implement fix for false negative UPPER_BOUND_VIOLATED with generic typealias using not all type parameters as arguments for underlying type
• KT-43493 NI: @BuilderInference prevents compilation error of "Operator '==' cannot be applied to 'Long' and 'Int'"
• KT-48945 JVM IR: special bridge for get is not generated in a Map subclass
• KT-49829 Wrong "cast can never succeed" diagnostic with builder inference
• KT-49828 Improve builder inference diagnostics with overload resolution ambiguity
• KT-50989 CCE cause by EmptySubstitutor in ResolutionWithStubTypesChecker
• KT-48899 Report warnings on overrides with wrong types nullability
• KT-49461 Implement prohibitation of access to members of companion of enum class from initializers of entries of this enum
• KT-49754 Kotlin/JS: @JsExport on enum class reports NON_EXPORTABLE_TYPE warning
• KT-49598 Misleading error message "Using @JvmRecord is only allowed with -jvm-target 15 and -Xjvm-enable-preview flag enabled"
• KT-44133 Inline classes: class literal in annotation arguments uses underlying type
• KT-47703 ClassCastException: Programmatically created annotation can't hold Array<KClass<*>>
• KT-47549 JVM / IR: Null argument in ExpressionCodegen for parameter VALUE_PARAMETER CONTINUATION_CLASS caused by suspend function inside "fun interface" in another file
• KT-50120 HMPP: False positive [NO_VALUE_FOR_PARAMETER] for expect function usages
• KT-48499 Interface call with an inline/value parameter generates AbstractMethodError after rebuilding the module, but NOT the file.
• KT-49864 JVM IR: NoSuchMethodError calling default interface method with inline class return type in -Xjvm-default=all mode
• KT-49812 JVM / IR: "java.lang.VerifyError: Bad return type" when using Result type attribute + extension function with same name
• KT-49936 Extension property in a data class with the same name as the constructor parameter leads to incorrect component function being resolved and generated
• KT-48181 "ISE: Null argument in ExpressionCodegen for parameter VALUE_PARAMETER" on creating instance of kotlin.Metadata
• KT-50215 VerifyError caused by missing cast after is check in when
• KT-49977 "Parameter specified as non-null is null" when inline class implements interface method with default parameters
• KT-50385 DUPLICATE_LABEL_IN_WHEN is reported on incorrect branches
• KT-49092 JVM: ArrayIndexOutOfBoundsException on compiling call with if expression and TODO() arguments
• KT-48987 JVM / IR: Smartcast, which never succeed, crashes the compiler
• KT-49998 JVM: missing default value for annotation parameter of an unsigned type
• KT-50277 Invalid bytecode generated for inline lambda in suspend function
• KT-44561 FIR DFA: extract non-null info from comparison against variable with initial constant value
• KT-44560 FIR DFA: propagate non-null info to original variables in not-null assertion or cast expression
• KT-50258 equals() returns false on the same enum instances if we check it for the second time in when
• KT-47483 JVM IR: "NoSuchElementException: Sequence contains no element matching the predicate" on compiling Array instantiation with TODO
• KT-49765 JVM: ClassCastException when trying to add object to EmptyList
• KT-46879 "AssertionError: Stack should be spilled before suspension call" with Flow and reified type
• KT-50172 "AssertionError: Not a callable reflection type" on local function reference with the same name as local variable
• KT-49443 JVM IR, Script: "IllegalStateException: No mapping for symbol: VALUE_PARAMETER INSTANCE_RECEIVER" with constructor call of class that has a top-level extension function call
• KT-50193 Garbage collection is not working the same way after jvm-ir-backend change
• KT-19424 Compilation exception for script with property delegate calling operator invoke on an object
• KT-43995 Script: "IllegalStateException: No mapping for symbol: VALUE_PARAMETER INSTANCE_RECEIVER" if companion object initializer calls method on list
• KT-30616 Script: "Don't know how to generate outer expression" for top-level variable reference from static context (companion object, enum)
• KT-47000 Allow graceful migration to -Xjvm-default=all-compatibility by allowing to inherit from interfaces even in the old (-Xjvm-default=disable) mode
• KT-50171 JVM IR: "UninitializedPropertyAccessException: Parent not initialized: IrVariableImpl" on SAM-converted property setter reference with Double parameter inside lambda
• KT-50140 Internal error on explicit string concatenation of generic type value with 'String' upper bound
• KT-49992 Anonymous object should not have access to private members from supertypes
• KT-49973 Check existing of default error message for all diagnostics
• KT-50019 Property delegated to callable reference: "ISE: Local class should have its name computed in InventNamesForLocalClasses" with -Xno-optimized-callable-references
• KT-49645 JVM / IR: "IllegalStateException: Local class should have its name computed" caused by default suspend function in interface and value class
• KT-50028 Incorrect implicit casts from Unit
• KT-49615 JVM / IR: "Exception during IR lowering" with list of value classes with non-trivial constructor inside suspend lambda
• KT-49127 FIR: smart cast is not performed after comparison
• KT-48708 Incorrect cast from Unit to Int
• KT-48376 FIR: False positive UNITIALIZED_VARIABLE after try/finally with return from try
• KT-48113 FIR: (false) positive EQUALITY_NOT_APPLICABLE for intersection with platform type
• KT-48305 FIR: incorrect raw type cast
• KT-48378 FIR: synthetic accessor lowering should not attempt to modify other files
• KT-48634 FIR: false property-setter-function resolve cycle
• KT-48621 FIR: SyntheticAccessorLowering should not attempt to modify other files for protected JvmField
• KT-48381 Invalid LLVM module: verification failure of createInlineClassInArgumentPosition.kt
• KT-48527 Native: top-level properties in files with @Test functions are initialized eagerly even if lazy initialization is enabled
• KT-48559 IllegalArgumentException: Unexpected super type argument: * @ 0 during IR lowering
• KT-48687 IR dump mismatch after deep copy with symbols in IR text test
• KT-44811 [FIR] Exception in body resolve of new contracts
• KT-48363 FIR behaves differently in case of resolution between classifier and top-level property
• KT-48801 "AssertionError: Stack should be spilled before suspension call" with Flow and crossinline
• KT-46389 JVM / IR: "ClassCastException: class IrGetValueImpl cannot be cast to class IrConst" with inheritance of supertypes member functions with similar signatures
• KT-47797 Regression during migration to 1.6 in compiler
• KT-47987 Can't infer a postponed type variable based on callable reference receiver type
• KT-48446 "IllegalStateException: IrErrorType (getErasedUpperBound)" caused by suspend function reference
• KT-48651 Collect intermediate annotations during type expanding
• KT-48754 JVM IR: in EnclosingMethod leads to IncompatibleClassChangeError on Android 5.0
• KT-45034 Use the new type inference for top-level callable references
• KT-49001 OptIn marker should spread from class to its members, taking into account real dispatch receiver type
• KT-49038 Generics are discriminated during callable references resolution (false negative)
• KT-48954 JVM IR: IllegalAccessError when using Java method reference in constructor
• KT-48284 JVM / IR: "IllegalStateException: Function has no body: FUN STATIC_INLINE_CLASS_REPLACEMENT" caused by inline member toString of value class and string interpolation
• KT-49053 JVM / IR: "AssertionError: Unbound symbols not allowed" on inheriting a protected Java method that returns a package private class from a differently-named file
• KT-49106 JVM: infinite recursion with overridden default suspend interface method where override calls super
• KT-45345 FIR DFA: FirDataFlowAnalyzer seems to add wrong type constraints for type parameters
• KT-44513 FIR DFA: extract non-null info from x?.y!!
• KT-44559 FIR DFA: propagate non-null info from not-null assertion (!!)
• KT-49073 FIR: REDUNDANT_MODIFIER and DEPRECATED_MODIFIER_PAIR should be warnings
• KT-46371 FIR: Investigate FunctionType -> ExtensionFunctionType coercion
• KT-49078 FIR: false positive TYPE_VARIANCE_CONFLICT
• KT-47135 FIR: local class references does not compile
• KT-48600 NON_TAIL_RECURSIVE_CALL missing for calls inside lambda
• KT-48602 NON_TAIL_RECURSIVE_CALL missing for calls with explicit dispatch receiver to a singleton
• KT-48982 JVM / IR: KotlinNothingValueException caused by function with local object
• KT-49087 FIR: false positive REPEATED_ANNOTATION
• KT-48648 JVM IR: "AssertionError: Should be primitive or nullable primitive type" with @JvmField generic property with Number upper bound
• KT-49069 FIR: False positive INAPPLICABLE_JVM_NAME on getter
• KT-49203 JVM IR: "AssertionError: Unbound symbols not allowed" with lateinit var and plusAssign operator convention call
• KT-48993 JVM / IR: "IllegalStateException: Validation failed in file <multi-file facade ...>" using @JvmMultifileClass and one of the symbols in the file exposes a @JvmInline value class
• KT-48938 FIR: Investigate how priorities should work in case SAM-conversion + type parameters
• KT-49129 FIR: false positive of INNER_CLASS_OF_GENERIC_THROWABLE_SUBCLASS
• KT-49076 FIR: false positive "An annotation argument must be compile-time constant" on array of imports
• KT-49222 FIR: StackOverflow in MethodSignatureMapper
• KT-49083 FIR erroneously requires default value parameters for override calls when imported from object
• KT-49135 FIR: ambiguity between type alias and function
• KT-49134 FIR makes no difference between lambda with empty parameter list and without explicit parameter list
• KT-49301 FIR: Unresolved reference: for object inherited from inner class
• KT-49070 FIR: ABSTRACT_CLASS_MEMBER_NOT_IMPLEMENTED with type parameter / class conflict
• KT-49133 FIR: protected java.lang.Throwable constructor is not available
• KT-49407 JVM / IR: "java.lang.VerifyError: Bad local variable type" with "Int.mod" inside "Long.mod" and non-trivial argument
• KT-44975 SUBCLASS_CANT_CALL_COMPANION_PROTECTED_NON_STATIC: confusing error message
• KT-38698 MANY_INTERFACES_MEMBER_NOT_IMPLEMENTED error message: interface is called a "class"
• KT-45001 Confusing warning message "This class can only be used with the compiler argument" for @OptIn annotation
• KT-49411 JVM / IR: NullPointerException during IR lowering with @JvmField property in loop range
• KT-49260 FIR: make FirBasedSymbol hierarchy to correspond FirDeclaration hierarchy
• KT-49289 FIR: false positive "return required" for if/else with inlined return in branch
• KT-49316 JVM / IR: "AssertionError: SyntheticAccessorLowering should not attempt to modify other files!" caused by unreachable code which try to modify val from the other package
• KT-45915 NoDescriptorForDeclarationException: Descriptor wasn't found for declaration FUN with circular module dependencies in JPS
• KT-49288 FIR2IR: consider generating all fake override calls properly
• KT-42784 FIR2IR: first create fake overrides, then bind overridden to them
• KT-48816 Kotlin/Native Symbol for public platform.darwin/NSObject|null[100] is unbound
• KT-49372 JVM / IR: Incorrect work of the loop optimization for mutable variable
• KT-49356 Native: UnsupportedOperationException: RETURNABLE_BLOCK caused by nested return with boxing and inline
• KT-49659 JVM IR: Missing value class mangling in SAM wrappers for fun interfaces from different modules
• KT-47101 Incorrect scope for supertypes in companion objects
• KT-49360 Invalid LLVM module: "inlinable function call in a function with debug info must have a !dbg location"
• KT-48430 JVM: ClassCastException with inline class as generic argument for type parameter used in a function type
• KT-49575 IllegalArgumentException: Unhandled intrinsic in ExpressionCodegen with circular module dependencies in JPS
• KT-47669 IR inliner doesn't handle inner class functions referring outer this
• KT-48668 JVM IR: "ISE: Value at CLASS must not be null for CLASS" for modules with a dependency cycle
• KT-49370 JVM / IR: "java.lang.VerifyError: Bad local variable type" with "fun Long.mod" and non-trivial argument
• KT-46744 Memory Leaks in Kotlin daemon
• KT-48806 False-negative USED_AS_EXPRESSION for unreachable catch clauses
• KT-45972 FIR: type is incorrectly resolved to private
• KT-46968 Remove FirCompositeScope from type resolve
• KT-49072 FIR: accidental resolve to private-in-file type
• KT-34822 FIR scopes: deal with nested / inner classes and type parameter priority
• KT-49702 Exception from RENDER_WHEN_MISSING_CASES diagnostic on malformed sealed class inheritor
• KT-49860 [FIR] Add smartcast expression to synthetic subj access
• KT-49836 Inference fails on lambda and adjacent function expressions with receiver
• KT-49832 Inference fails on lambda for function types with extension parameter
• KT-49793 JVM: IncompatibleClassChangeError: Expected non-static field when property delegation uses receiver of another delegated property
• KT-44022 Excessive diagnostics range for DECLARATION_CANT_BE_INLINED
• KT-48690 VERSION_REQUIREMENT_DEPRECATION_ERROR message: use current compiler version instead of language version
• KT-49609 Incorrect grammar in DATA_CLASS_NOT_PROPERTY_PARAMETER error message
• KT-49600 Misspelled error message for non-constructor properties with backing fields in @JvmRecord class
• KT-49339 Warn about synchronizing on value classes
• KT-49950 Compilation failed: An operation is not implemented: IrBasedTypeParameterDescriptor
• KT-23890 Default arguments are not transferred from expect generic member functions
• KT-48811 Expect/actual class with default constructor argument values can not be instantiated from a shared source set without passing arguments (with HMPP enabled)
• KT-48106 FIR: incorrect type inference in provideDelegate receiver
• KT-48325 Safe call operator prevents object from being garbage collected before leaving function
• KT-48104 FIR does not see NotNull/Nullable annotations on type arguments
• KT-46812 [FIR] Make FIR diagnostics not related to Diagnostics from FE 1.0
• KT-37374 [FIR] Add CheckInfixModifier resolution stage
• KT-38351 FIR: Support CheckOperatorModifier resolution stage
• KT-39614 [FIR] Fix building CFG for different candidates of plus assign call
• KT-40197 [FIR] Strange Behaviour of Type Arguments
• KT-40362 [FIR] Match type arguments with type parameters of corresponding qualifier
• KT-40375 FIR: No transformation implicit type -> error type for function value parameters
• KT-40585 [FIR] Incorrect type for 1/1.0
• KT-42525 [FIR] Incorrect IR produced for java.lang.Byte.MAX_VALUE
• KT-43359 FIR: Check applicability type for callable reference with unbound receiver
• KT-43378 FIR: Support or prohibit via call checker callable references to member extensions
• KT-43289 FIR: Correctly load irrelevant override for special built-ins
• KT-44558 Annotation arguments const expr support is missing in FIR
• KT-45223 [FIR] Ambiguity between explicit and synthetic removeAt
• KT-42215 FIR: callable reference resolution with type constraints at call-sites
• KT-45520 FIR: NONE_APPLICABLE for unsafe call to function with overloads instead of UNSAFE_CALL
• KT-46410 [FIR] Transform of FirAugmentedArraySetCall leaves erroneous nodes in control flow graph
• KT-46421 FIR: Investigate builder-inference cases
• KT-43948 FIR: hidden unresolved callable reference
• KT-46558 FIR DFA: run once contract is not considered when analyzing lambda
• KT-47125 FIR: Do not avoid trivial constraints if they aren't from upper bounds
• KT-43691 FIR: false positive VARIABLE_INITIALIZER_IS_REDUNDANT with usage in try...finally
• KT-37311 [FIR] Support inference of callable references with type variable as expected type
• KT-31972 Error type encountered: org.jetbrains.kotlin.types.ErrorUtils$UninferredParameterTypeConstructor@1f5b38c2 (ErrorType).
• KT-48761 Report NO_TAIL_CALLS_FOUND on 'tailrec' modifier, not on the whole function header
• KT-47647 NI: Function reference to Java static method can't compile if passed directly as KFunction1 parameter
• KT-46995 Fix setters implicit types only resolved on full body resolve
• KT-46359 Kotlin 1.5 lambda is not Java-serializable by default
• KT-49282 FIR: suspend conversion does not work inside suspend lambda
• KT-48953 FIR: implement diagnostic DELEGATE_USES_EXTENSION_PROPERTY_TYPE_PARAMETER
• KT-38813 FIR: Report INSTANCE_ACCESS_BEFORE_SUPER_CALL diagnostic on receiver usages in secondary constructors headers
• KT-49657 FIR: accidental override with get:JvmName
• KT-49655 FIR: smart cast is not performed after update of var to not-null value in branch

IDE

• KT-42194 OOME: Java heap space from incremental compilation

IDE. Gradle Integration

• KT-47570 MPP, IDE: kotlin-test-common leaks into dependencies of platform-specific source sets

JavaScript

New Features

• KT-43224 KJS: Allow using inline classes in external types
• KT-35100 Make Char inline class in K/JS
• KT-47525 KJS / IR: Support protected members in d.ts generation
• KT-44494 KJS / IR: Allow enum classes to be exported
• KT-50110 KJS / IR: Enable properties lazy initialization by default

Performance Improvements

• KT-43644 KJS / IR: Avoid creating lambda classes

Fixes

• KT-50934 KJS / IR: Re-export all JS-exports from the main module for the multi-module mode
• KT-45620 KJS / IR: Remainder of division of Int.MIN_VALUE by -1 is negative zero (-0)
• KT-46225 KJS IR: tailrec function with capturing lambda in default parameter value leads to UninitializedPropertyAccessException at compile time
• KT-50512 KJS / IR: IC failed with const val in inline fun
• KT-49738 Ensure that @AfterTest is invoked after the @Test function completes for asynchronous tests
• KT-45542 KJS / IR: "IllegalStateException" for method with default argument in expect class
• KT-50464 KJS IR: Functions with optional parameters and stable names are exported without @JsExport
• KT-43374 KJS / IR: "class org.jetbrains.kotlin.js.backend.ast.JsIf cannot be cast to class org.jetbrains.kotlin.js.backend.ast.JsExpressionStatement" caused by if-else expression inside when
• KT-20791 ushr Behavior differs in Javascript and Java targets
• KT-37916 KJS: .d.ts generation not working for enum classes
• KT-49844 KJS / IR: "IllegalStateException: IrSimpleFunctionSymbolImpl is already bound" with callable reference
• KT-46961 KJS / IR: "IllegalStateException: Can't find name for declaration" when external object contains enum class
• KT-43191 KJS / IR: static companion field is not static in d.ts
• KT-39891 [KJS / IR] String interpolation and byte shift round Long value
• KT-50040 JS IR: "Function must be an accessor of corresponding property" exception on private properties with getter in an exported class
• KT-49878 Kotlin/JS, IR: incremental compilation fails with CCE: "class StageController cannot be cast to class WholeWorldStageController"
• KT-46202 KJS / IR: "IllegalStateException" on exported value class
• KT-42039 KJS / IR: JsQualifier annotation can cause conflicts with built-in functions
• KT-39364 KJS: Can't export sealed class/object with subclasses inside the body to typescript definition
• KT-47360 KJS / IR: js() function with string val
• KT-47376 KJS / IR: Incorrect d.ts generation for sealed classes
• KT-47767 KJS / IR: "IllegalStateException" with inline function with several lambda invocation declared through typealias
• KT-47342 KJS / IR: "StackOverflowError" on InlinerTypeRemapper.remapTypeArguments
• KT-46218 KJS / IR: Incorrect result for local tailrec function called from capturing inline lambda
• KT-45056 KJS / IR: Inconsistent ordinal property value for enum classes
• KT-47096 KJS / IR: Console.log introduces spaces between each character
• KT-47516 KJS / IR: Wrong behavior when trying to access property in enum entry
• KT-47806 KJS / IR: "IllegalStateException" with invocation of extension function with generic and lambda parameter on String.Companion
• KT-49225 KJS: Default value for value class parameter is not considered
• KT-49326 KJS / IR: Overridden properties should not be exported
• KT-49363 KJS / IR: Nested declarations inside exported object are not exported
• KT-49300 KJS: Source map generator leaks source files descriptors when source embedding is enabled
• KT-50197 KJS IR: using APIs in different packages but with same method name generates clashes
• KT-50203 JS IR BE: new IC for lowerings
• KT-43250 KJS / IR: "Can't find name for declaration FUN" with Json#encodeToString as function reference
• KT-46992 KJS / IR: Incorrect boxing of inline classes returned by crossinline suspend lambdas
• KT-49776 KJS / IR: inliner doesn't handle inner class functions referring outer this
• KT-49849 KJS / IR: Access of exported member properties should be by its stable name
• KT-49850 KJS / IR: Member properties in exported class should be getter/setter in d.ts

Language Design

• KT-42435 Prototype multiple receivers
• KT-48385 Deprecate confusing grammar in when-with-subject
• KT-50251 Support language version 1.3 in Kotlin 1.6.20
• KT-19423 Script: reference from class to script top-level member is incompilable
• KT-17765 Ambiguity between SAM adapters when one SAM interface is sub type of another
• KT-10926 False overload resolution ambiguity when both vararg and collection match
• KT-41214 JDK 17: Emit PermittedSubclasses attribute when compiling sealed classes

Libraries

• KT-44089 Java version checking doesn't work on Android
• KT-50033 Some packages of kotlin-stdlib with public API are not exported in module-info
• KT-48367 Using synchronized on captured object leads to slow JVM execution
• KT-49721 KJS: Regex("\b").findAll yields infinite sequence when a zero length match is found before a surrogate pair (e.g. emoji)

Native

• KT-49348 KONAN_NO_64BIT_ATOMIC does not guard Kotlin_AtomicLong_addAndGet
• KT-42500 KLIB: K/N compiler cannot link with a library with incorrect symbol in the name or the path
• KT-49395 K/N: After 1.5.20, compiling code including KSuspendFunction3 to framework leads to "Assertion failed at parametersAssociated"
• KT-49967 Kotlin iOS regex issue
• KT-49873 Native does not sort Strings correctly
• KT-49347 androidNativeArm32 binaries crash when using atomic operations
• KT-49144 Kotlin/Native executable early segmentation fault
• KT-49463 --dry-run flag for llvm_builder/package.py
• KT-49597 Kotlin/Native: Exporting the Arrow library into the framework causes StackOverflowError in the Devirtualization phase
• KT-49790 "Undefined symbols" error when linking project with kotest 5.0.0.RC and Kotlin 1.6

Native. Build Infrastructure

• KT-48625 Native: distribution doesn't contain sources for kotlin.test

Native. C Export

• KT-47828 Kotlin/Native: Kotlin exception is not filtered out on interop border when producing a dynamic library with compiler caches enabled

Native. C and ObjC Import

• KT-35059 Better "could not build module" cinterop report
• KT-49768 Kotlin/Native: Add -Xoverride-konan-properties to cinterop.

Native. ObjC Export

• KT-47399 Kotlin Native - Objective-C with Swift 5.5 Async Function Needs Returning KotlinUnit
• KT-48282 Kotlin sealed class roots and abstract classes within sealed hierarchies have their constructors exposed to Objective-C/Swift
• KT-46866 Memory consumption / performance of Kotlin classes with String property in KMP project on iOS Swift

Native. Platform Libraries

• KT-50045 Kotlin/Native: Re-enable disabled Hypervisor framework
• KT-47331 Kotlin/Native: support Xcode 13 SDKs

Native. Runtime

• KT-50491 Kotlin/Native: Deadlock in the Ktor server tests with the new memory manager

Native. Runtime. Memory

• KT-49497 iOS Swift "runtime assert: Must be positive" and "runtime assert: cycle collector shall only work with single object containers"
• KT-50026 Kotlin/Native: Make AtomicReference behave like FreezableAtomicReference with the new MM
• KT-49013 Kotlin/Native: Correctly switch thread state to native for spin locks

Native. Testing

• KT-48561 Test sideEffectInTopLevelInitializerMultiModule fails with new MM

Reflection

• KT-50198 Reflection: NPE from kotlin.jvm.internal.Intrinsics.areEqual with Spock

Tools. Android Extensions

• KT-50627 NullPointerException when using kotlin-android-extensions synthetic after updating Kotlin to 1.6.10
• KT-50887 kotlin-android-extensions plugin breaks when package attribute missing from AndroidManifest.xml

Tools. CLI

• KT-46329 Deprecated -Xjvm-default values are not reported
• KT-48027 "Module ... cannot be found in the module graph" with module-info in META-INF/versions
• KT-48417 CLI: boolean -X arguments accept a value after '=' which is ignored
• KT-11164 Allow running class files with '.class' extension in 'kotlin' script
• KT-46171 NoClassDefFoundError produced when running kotlin script

Tools. Commonizer

• KT-48856 MPP: Unable to resolve c-interop dependency for test compilation in an intermediate source set with the only platform
• KT-46257 MPP: Stdlib included more than once for an enabled hierarchical commonization
• KT-48288 [Commonizer] platform.posix.timespec.tv_sec not commonized in OKIO
• KT-47574 [Commonizer] TypeAliasTypeCommonization: Properly substitute underlying type arguments
• KT-48221 MPP: Too few targets specified if platform test source set depends on main
• KT-47100 [Commonizer] Commonize underlying type-alias types

Tools. Compiler Plugins

• KT-50718 Unable to serialize an object with a generic field
• KT-50764 Kotlin 1.6.10 custom serializers for a generic type receive the unit serializer on jvm
• KT-46444 JVM IR, serialization: "AssertionError: No such value argument slot in IrConstructorCallImpl: 0" with KSerializer of ClosedRange

Tools. Gradle

New Features

• KT-41689 Support statistics for Configuration Cache
• KT-49299 Add more flexible way for defining Kotlin compiler execution strategy
• KT-21056 Kotlin Gradle Plugin tasks execution should be parallelized by default

Performance Improvements

• KT-50664 Compile speed regression going from Kotlin 1.5.31 to 1.6.10 for incremental changes when Java class in a dependent child module w/ kapt is modified w/o a method/class signature change
• KT-48884 Configuration performance regression in Kotlin Gradle plugin 1.5.30
• KT-49782 Improve compilation task outputs snapshot performance

Fixes

• KT-48134 Debug log level causes build cache miss
• KT-49014 Disable Explicit API is not possible
• KT-48408 Build may fail with strict JVM target validation mode when project has no Kotlin sources
• KT-50620 Gradle Kotlin Plugin crashes in CI due to hostname resolving issue
• KT-49921 Setup basic release performance regression tests
• KT-50369 Deprecate kotlin.experimental.coroutines Gradle DSL option and kotlin.coroutines property
• KT-48046 Gradle Throws Exception From Kotlin Plugin: destinationDir must not be null
• KT-50037 Kotlin compile task registers more than one task action and their order of execution is counter-intuitive
• KT-49772 Kotlin in-process compilation does not release file handles
• KT-47215 KJS: "UninitializedPropertyAccessException: lateinit property fileHasher has not been initialized" when running kotlinNpmInstall or rootPackageJson locally
• KT-46406 Remove 'kotlin.parallel.tasks.in.project' build property

Tools. Gradle. JS

• KT-49253 KJS / Gradle: Error while evaluating property 'filteredArgumentsMap' of task ':compileProductionExecutableKotlinJs'
• KT-49037 KJS / Gradle: Configuration cache usage on large projects lead to high memory consumption by Gradle daemon
• KT-49902 Kotlin/JS: Gradle: with --debug it still runs yarn without --ignore-scripts
• KT-49808 KJS / Gradle: NPE when running node.js Mocha tests with configuration cache reuse
• KT-49530 KJS: Update Node.JS and Yarn
• KT-49445 KJS / IR: "AssertionError: Built-in class kotlin.Unit is not found" 1.5.31 fails on consuming artifacts built with 1.6.0

Tools. Gradle. Multiplatform

• KT-49089 An annotation class annotated with @OptionalExpectation can not be used in another module with HMPP enabled
• KT-48818 False positive warning about used enableDependencyPropagation flag with enabled hierarchical mpp by default
• KT-49596 Composite Metadata Jar: Read location of cinterops from KotlinProjectStructureMetadata file
• KT-41823 Default arguments not work in iosMain metadata with enableGranularSourceSetsMetadata
• KT-50574 Only enable cinterop metadata transformation when 'kotlin.mpp.enableCInteropCommonization' is set

Tools. Gradle. Native

New Features

• KT-47633 Accept version when configuring cocoapods for kotlin/native
• KT-42630 CocoaPods Gradle plugin: Allow customization of podspec properties
• KT-48553 Kotlin/Native: use Gradle Shared Build Service to read konan.properties
• KT-47529 Read list of opt-in cacheable native targets from konan.properties

Fixes

• KT-49484 Kotlin/Native: XCFramework should include dSYM files for release artifacts
• KT-47768 Gradle MPP plugin: K/N targets break task configuration avoidance for assemble task
• KT-49971 Make 'embedAndSignAppleFrameworkForXcode' task visible for users
• KT-43815 [CocoaPods Plugin] Pod name cannot be changed
• KT-42105 Multiplatform Cocoapod kotlin plugin doesn't support repo distribution
• KT-48808 XCFramework task fails when using static debug frameworks
• KT-42755 Cocoapods plugin using backslashes on Windows

Tools. JPS

• KT-49177 JPS: Kotlin compiler doesn't recompile file that references Java constant in class body
• KT-46506 JPS: Kotlin compiler doesn't recompile file that references Java constant
• KT-47909 UtilsKt.recordPackageLookup is slow
• KT-47857 Class loaders clash when building kotlin project with FIR with JPS without daemon

Tools. Kapt

• KT-32596 kapt replaces class generated by annotation processor with error.NonExistentClass when the class is used as an annotation
• KT-48617 Cache miss due to empty directories in KaptGenerateStubsTask inputs
• KT-48826 Deprecate 'kapt.use.worker.api' property
• KT-47002 Kapt: warning mentions non-effective property kapt.includeCompileClasspath

Tools. Maven

• KT-50306 Configured plugin dependencies should be available in kotlin-maven-plugin scripts

Tools. Parcelize

• KT-19853 Parcelize: CREATOR field should be available from code

Tools. REPL

• KT-20488 REPL: java.lang.InternalError: "Enclosing constructor not found" for class reference on an anonymous object literal

Tools. Scripts

• KT-40497 “Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6.” for running script without specified jvm-target
• KT-49329 Kotlin scripts are compiled with jvmTarget 1.8 by default and in many scenarios there is no way to redefine it, which lead to inlining errors e.g. with JDK 17

Checksums

File	Sha256
kotlin-compiler-1.6.20-M1.zip	158285a6d198c2ee745c17165bdd89bc8736b2751a97ac13a64a8ad385914429
kotlin-native-linux-x86_64-1.6.20-M1.tar.gz	8d6b6b733e0ec5a69ab3ef722fe025719d940eb5993b9ca483bdf9e21c741d9d
kotlin-native-macos-x86_64-1.6.20-M1.tar.gz	31ae3f13ef4377f9e6597d20a4b4088da300092b94ed1781a21ed773b264b0c2
kotlin-native-macos-aarch64-1.6.20-M1.tar.gz	c67e9eca5519299f9f5733976e4952a81625d5bf11194714567a9bae7c031728
kotlin-native-windows-x86_64-1.6.20-M1.zip	e9b25e4b078517b5f48cd7d14cfc71014c300cd95cd1826728342e0d4c4e2074