Kotlin 1.5.20

How to update to a new release

Changelog

Compiler

New Features

• KT-43262 No error for Java generic class @NotNull type parameter used in Kotlin with nullable type argument
• KT-44373 FIR: support error / warning suppression
• KT-45189 Support nullability annotations at module level
• KT-45284 Emit warnings based on jspecify annotations
• KT-45525 Allow to omit JvmInline annotation for expect value classes
• KT-46545 Emit annotations on function type parameters into bytecode for -jvm-target 1.8 and above

Performance Improvements

• KT-36646 Don't box primitive values in equality comparison with objects in JVM_IR

Fixes

• KT-8325 Unresolved annotation should be an error
• KT-19455 Type annotation unresolved on a type parameter of a supertype in anonymous object expression
• KT-24643 Prohibit using a type parameter declared for an extension property inside delegate
• KT-25876 Annotations on return types and supertypes are not analyzed
• KT-28449 Annotation target is not analyzed in several cases for type annotations
• KT-36770 Prohibit unsafe calls with expected @NotNull T and given Kotlin generic parameter with nullable bound
• KT-36880 K/N IR: Reference to expect property in actual declaration is not remapped
• KT-38325 IllegalStateException: No parameter with index 0-0 when iterating Scala 2.12.11 List
• KT-38342 FIR: Consider renaming diagnostic from AMBIGUITY to OVERLOAD_RESOLUTION_AMBIGUITY
• KT-38476 [FIR] Forgotten type approximation
• KT-38540 Kotlin/Native Set.contains fails with specific enum setup
• KT-40425 IrGenerationExtension. Support simple reporting to compiler output (for development/debug)
• KT-41620 ClassCastException: Class cannot be cast to java.lang.Void
• KT-41679 NI: TYPE_MISMATCH wrong type inference of collection with type Any and integer literal
• KT-41818 NI: False positive IMPLICIT_NOTHING_TYPE_ARGUMENT_IN_RETURN_POSITION leads to NothingValueException on delegated properties
• KT-42239 IR: Report compilation error instead of throwing an exception (effectively crash compiler) when some declaration wasn't found while deserialization
• KT-42631 ArrayIndexOutOfBoundsException was thrown during IR lowering
• KT-43258 NI: False positive "Suspend function 'invoke' should be called only from a coroutine or another suspend function" when calling suspend operator fun on object property from last expression of a crossinlined suspend lambda
• KT-44036 Enum initialization order
• KT-44511 FIR DFA: smartcast after if (nullable ?: boolean)
• KT-44554 RAW FIR: NPE in RawFirBuilder
• KT-44682 raw FIR: incorrect source for qualified access
• KT-44695 *_TYPE_MISMATCH_ON_OVERRIDE checkers do not work for anonymous objects
• KT-44699 FIR: incorrect lambda return type (led to a false alarm: PROPERTY_TYPE_MISMATCH_ON_OVERRIDE)
• KT-44802 FIR bootstrap: trying to access package private class
• KT-44813 FIR bootstrap: various errors in collection-like classes
• KT-44814 FIR bootstrap: incorrect cast in when branch
• KT-44942 [FIR] ClassCastException in boostrap tests
• KT-44995 FIR: false positive for ANNOTATION_ARGUMENT_MUST_BE_CONST
• KT-45010 FIR: lambda arguments of inapplicable call is not resolved
• KT-45048 FIR bootstrap: VerifyError on KtUltraLightClass
• KT-45052 FIR bootstrap: inapplicable candidate in GenerateSpecTests.kt
• KT-45121 FIR IDE: redundant vararg parameter type transformation
• KT-45136 Native: dividing Int.MIN_VALUE by -1 crashes or hangs
• KT-45236 JVM / IR: "IllegalStateException: Symbol with IrTypeParameterSymbolImpl is unbound" caused by contracts and sealed class
• KT-45308 Psi2ir: "AssertionError: TypeAliasDescriptor expected" caused by using typealias from one module as a type in another module without a transitive dependency
• KT-45316 [FIR] Ambiguity between two implicit invokes with receiver
• KT-45344 FIR: Wrong inferred type for nullable type parameter
• KT-45385 FIR: false positive MUST_BE_INITIALIZED_OR_BE_ABSTRACT after rethrow
• KT-45475 [FIR] No smartcast after throw in if inside try block
• KT-45508 False negative ABSTRACT_CLASS_MEMBER_NOT_IMPLEMENTED on a fake override with an abstract super class member
• KT-45578 REPL: Unresolved imports are cached for the subsequent compilations
• KT-45685 JVM IR: capturing a variable into crossinline suspend lambda makes the function inside inline function no longer unbox Result
• KT-45584 [FIR] Fix overriding property and java function in java class
• KT-45697 JVM IR: ISE "Function has no body" on getter of private field in a class present both in sources and dependencies
• KT-45842 Compiler doesn't allow a shared class to inherit a platform-specific sealed class
• KT-45848 False negative [SEALED_INHERITOR_IN_DIFFERENT_MODULE] error in compiler for a platform-specific inheritor of a shared sealed class
• KT-45931 There is no warning based on nullability java annotation
• KT-45998 JVM IR: AE when an accessor to a protected companion object member is being generated in child class
• KT-46048 Enum entries init order in companion object
• KT-46074 FIR: private-in-file fun interface is considered invisible in this file
• KT-46173 No error reporting on annotations on target type of as expression in return
• KT-46235 JVM IR: Stack overflow error on large expressions
• KT-46270 [FIR] Support @PublishedAPI in inline checker
• KT-46539 Generate annotations on type parameters bounds in bytecode
• KT-46578 JVM IR: IllegalAccessError accessing property delegated to java super class protected field reference
• KT-46597 JVM IR: AssertionError: SyntheticAccessorLowering should not attempt to modify other files - crossinline accessor
• KT-46601 JVM / IR: IllegalStateException: "Can't find method 'invokeinvoke`" when default lambda takes inline class parameters
• KT-46670 StackOverflowError on inheritance from raw type where class has protobuf-like recursive generics
• KT-46715 JVM / IR: "AssertionError: Unbound symbols not allowed IrConstructorSymbolImpl" with enum classes with the same name in test and src folders
• KT-46759 JVM IR: CCE in LateinitUsageLowering on @JvmStatic lateinit property in object
• KT-46777 [Native] [IR] Support suspend function as super type
• KT-46802 JVM / IR: "UnsupportedOperationException: Unknown structure of ADAPTER_F...

Kotlin 1.5.20-RC

Changelog

Backend. IR

• KT-42239 IR: Report compilation error instead of throwing an exception (effectively crash compiler) when some declaration wasn't found while deserialization

Compiler

New Features

• KT-44373 FIR: support error / warning suppression

Fixes

• KT-38342 FIR: Consider renaming diagnostic from AMBIGUITY to OVERLOAD_RESOLUTION_AMBIGUITY
• KT-38476 [FIR] Forgotten type approximation
• KT-44682 raw FIR: incorrect source for qualified access
• KT-44813 FIR bootstrap: various errors in collection-like classes
• KT-45508 False negative ABSTRACT_CLASS_MEMBER_NOT_IMPLEMENTED on a fake override with an abstract super class member
• KT-45578 REPL: Unresolved imports are cached for the subsequent compilations
• KT-45685 JVM IR: capturing a variable into crossinline suspend lambda makes the function inside inline function no longer unbox Result
• KT-46235 JVM IR: Stack overflow error on large expressions
• KT-46578 JVM IR: IllegalAccessError accessing property delegated to java super class protected field reference
• KT-46597 JVM IR: AssertionError: SyntheticAccessorLowering should not attempt to modify other files - crossinline accessor
• KT-46601 JVM / IR: IllegalStateException: "Can't find method 'invokeinvoke`" when default lambda takes inline class parameters
• KT-46759 JVM IR: CCE in LateinitUsageLowering on @JvmStatic lateinit property in object
• KT-46777 [Native] [IR] Support suspend function as super type
• KT-46802 JVM / IR: "UnsupportedOperationException: Unknown structure of ADAPTER_FOR_CALLABLE_REFERENCE" caused by function reference on @JvmStatic function with unused default parameters
• KT-46813 JVM / IR: "ClassCastException: Integer cannot be cast to class Result" with Flow and fold method
• KT-46822 JVM IR: StackOverflowError on compiling a large data class
• KT-46837 Backend Internal error: Exception during IR lowering: assert at IrOverridingUtilKt.buildFakeOverrideMember
• KT-46921 JVM / IR: "IndexOutOfBoundsException: Cannot pop operand off an empty stack" caused by crossinline parameter and label return

Docs & Examples

• KT-33783 Document when a range created with rangeTo is empty

IDE

• KT-44825 Can't open Kotlin compiler settings in newly created project

IDE. Gradle Integration

• KT-45277 Wrong jvm target in gradle module in IDEA

IDE. Native

• KT-39320 [Commonizer] Reduce memory consumption

JavaScript

• KT-44394 KJS / IR: null companion object for existed stdlib interfaces NodeFilter and SVGUnitTypes
• KT-45361 KJS / IR: IrConstructorCall representing annotation always returns Unit
• KT-46859 Exception during IR lowering: NullPointerException was thrown at: optimizations.FoldConstantLowering.tryFoldingUnaryOps

Libraries

• KT-46002 Support all Unicode digit chars in digitToInt (JS and Native)
• KT-46184 Equivalize isLowerCase and isUpperCase behavior in all platforms

Middle-end. IR

• KT-40425 IrGenerationExtension. Support simple reporting to compiler output (for development/debug)
• KT-45308 Psi2ir: "AssertionError: TypeAliasDescriptor expected" caused by using typealias from one module as a type in another module without a transitive dependency

Native. ObjC Export

• KT-38600 Kotlin MP iOS Target doesn't contain kdoc comments

Reflection

• KT-10838 Provide sensible toString() for property accessors in reflection

Tools. CLI

• KT-14772 ISE (FNFE "Not a directory") on compilation with destination argument clashing with an existing file which is not a directory
• KT-18184 CompileEnvironmentException: Invalid jar path on "-d" with .jar in non-existing directory
• KT-40977 Report a readable diagnostic on empty -J argument in CLI

Tools. Compiler Plugins

• KT-45538 Serialization, JVM IR: "AssertionError: No such type argument slot in IrConstructorCallImpl" with inner classes
• KT-46469 Kotlin Lombok: accessors with AccessLevel.MODULE fail to resolve
• KT-46529 Kotlin Lombok: with @Accessors without explicit prefix the prefix from lombok.config is not taken into account
• KT-46531 Kotlin Lombok: lombok.getter.noIsPrefix is processed depending on character case

Tools. Gradle

• KT-24533 Kapt should not run when annotation processors are not configured
• KT-46401 Deprecate 'kotlin.parallel.tasks.in.project' build property
• KT-46820 Gradle: kotlinc (1.5.0) race condition causes a NullPointerException

Tools. Gradle. JS

• KT-46976 KJS: Broken support for dynamically created webpack.config.d

Tools. Gradle. Multiplatform

• KT-46394 Multiplatform: Gradle 7 support
• KT-46517 Add kotlin-project-model as api dependency to kotlin-gradle-plugin-api

Tools. Gradle. Native

• KT-46680 Register concrete "embedAndSign" tasks instead umbrella
• KT-46892 Kotlin Multiplatform Gradle Plugin: EmbedAndSign task always contains a default framework name

Tools. kapt

• KT-31146 kapt: executableElement.getAnnotation(JvmOverloads::class.java) returns null
• KT-35167 Kapt Gradle plugin doesn't handle --module-path javac argument
• KT-41581 Kapt doesn't have line breaks between warnings

Checksums

File	Sha256
kotlin-compiler-1.5.20-RC.zip	3537d9e9c57f4afc4e8359f695da98f631319464ba1330c70b1b4aca5d30b84e
kotlin-native-linux-1.5.20-RC.tar.gz	d84ea3f3187aaeb21cceb5402cc74951a7a737799ce68a701f58b76e5ef534a0
kotlin-native-macos-1.5.20-RC.tar.gz	b97b9cadb3791905dc15c090f3981dcb8a6eb4d31cf3721763070e12009d4b8e
kotlin-native-windows-1.5.20-RC.zip	c4ba183f211652881434ce4b41bde87b626d319134f5163bb8c295c186f3e1d5

Kotlin 1.5.20-M1

Changelog

Compiler

New Features

• KT-45189 Support nullability annotations at module level
• KT-45525 Allow to omit JvmInline annotation for expect value classes
• KT-46545 Emit annotations on function type parameters into bytecode for -jvm-target 1.8 and above

Performance Improvements

• KT-36646 Don't box primitive values in equality comparison with objects in JVM_IR

Fixes

• KT-8325 Unresolved annotation should be an error
• KT-19455 Type annotation unresolved on a type parameter of a supertype in anonymous object expression
• KT-24643 Prohibit using a type parameter declared for an extension property inside delegate
• KT-25876 Annotations on return types and supertypes are not analyzed
• KT-28449 Annotation target is not analyzed in several cases for type annotations
• KT-36770 Prohibit unsafe calls with expected @NotNull T and given Kotlin generic parameter with nullable bound
• KT-38325 IllegalStateException: No parameter with index 0-0 when iterating Scala 2.12.11 List
• KT-38540 Kotlin/Native Set.contains fails with specific enum setup
• KT-41620 ClassCastException: Class cannot be cast to java.lang.Void
• KT-41679 NI: TYPE_MISMATCH wrong type inference of collection with type Any and integer literal
• KT-41818 NI: False positive IMPLICIT_NOTHING_TYPE_ARGUMENT_IN_RETURN_POSITION leads to NothingValueException on delegated properties
• KT-42631 ArrayIndexOutOfBoundsException was thrown during IR lowering
• KT-43258 NI: False positive "Suspend function 'invoke' should be called only from a coroutine or another suspend function" when calling suspend operator fun on object property from last expression of a crossinlined suspend lambda
• KT-44036 Enum initialization order
• KT-44511 FIR DFA: smartcast after if (nullable ?: boolean)
• KT-44554 RAW FIR: NPE in RawFirBuilder
• KT-44695 *_TYPE_MISMATCH_ON_OVERRIDE checkers do not work for anonymous objects
• KT-44699 FIR: incorrect lambda return type (led to a false alarm: PROPERTY_TYPE_MISMATCH_ON_OVERRIDE)
• KT-44802 FIR bootstrap: trying to access package private class
• KT-44814 FIR bootstrap: incorrect cast in when branch
• KT-44942 [FIR] ClassCastException in boostrap tests
• KT-44995 FIR: false positive for ANNOTATION_ARGUMENT_MUST_BE_CONST
• KT-45010 FIR: lambda arguments of inapplicable call is not resolved
• KT-45048 FIR bootstrap: VerifyError on KtUltraLightClass
• KT-45052 FIR bootstrap: inapplicable candidate in GenerateSpecTests.kt
• KT-45121 FIR IDE: redundant vararg parameter type transformation
• KT-45136 Native: dividing Int.MIN_VALUE by -1 crashes or hangs
• KT-45316 [FIR] Ambiguity between two implicit invokes with receiver
• KT-45344 FIR: Wrong inferred type for nullable type parameter
• KT-45475 [FIR] No smartcast after throw in if inside try block
• KT-45584 [FIR] Fix overriding property and java function in java class
• KT-45697 JVM IR: ISE "Function has no body" on getter of private field in a class present both in sources and dependencies
• KT-45842 Compiler doesn't allow a shared class to inherit a platform-specific sealed class
• KT-45848 False negative [SEALED_INHERITOR_IN_DIFFERENT_MODULE] error in compiler for a platform-specific inheritor of a shared sealed class
• KT-46048 Enum entries init order in companion object
• KT-46074 FIR: private-in-file fun interface is considered invisible in this file
• KT-46173 No error reporting on annotations on target type of as expression in return
• KT-46270 [FIR] Support @PublishedAPI in inline checker
• KT-46539 Generate annotations on type parameters bounds in bytecode
• KT-46670 StackOverflowError on inheritance from raw type where class has protobuf-like recursive generics
• KT-46715 JVM / IR: "AssertionError: Unbound symbols not allowed IrConstructorSymbolImpl" with enum classes with the same name in test and src folders

IDE

• KT-44638 clone() call is unresolved in JVM module of a multiplatform project
• KT-45629 [ULC] KtUltraLightFieldForSourceDeclaration.nameIdentifier returns null
• KT-45908 Reproduciable 'org.jetbrains.kotlin.idea.caches.resolve.KotlinIdeaResolutionException: Kotlin resolution encountered a problem while analyzing KtNameReferenceExpression'

IDE. FIR

• KT-45175 FIR IDE: Exception with local property in init block
• KT-45199 FIR IDE: Error while collecting diagnostic on stale element after replacing element in quickfix
• KT-45312 FIR IDE: FIR plugin throws exception on synthetic function

IDE. Gradle Integration

• KT-34401 KotlinGradleModelBuilder builds models for non-kotlin modules and always trigger full task configuration.
• KT-46488 Import of a multiplatform project with MPP module depending on Kotlin/JVM one fails

IDE. Inspections and Intentions

• KT-45075 Inspection: Redundant creation of Json format
• KT-45347 Sealed interfaces: quickfix to move to package/module of sealed class/interface should not be shown in case of read-only declaration
• KT-45348 Sealed interfaces: show error for usage of sealed class/interface from a library in Java source code
• KT-46063 In multiplatform code, suggest to generate remaining when branches at least for shared sealed classes

IDE. Refactorings

• KT-44431 Quickfix to move class/interface to proper location: it is allowed to choose test source in JPS project while compiler does not allow it

JavaScript

• KT-40235 KJS: IR. Broken support for external interface companion
• KT-40689 KJS / IR: strange and slow code for kotlin.math.max and kotlin.math.min for Double
• KT-44138 KJS / IR: Constant folding works incorrectly with unsigned arithmetics
• KT-44950 KJS / IR: "IllegalStateException: Can't find name for declaration" in case of extending export declared class without @JsExport annotation
• KT-45057 KJS / IR: "ClassCastException" when using js function in init block
• KT-45655 KJS: "REINTERPRET_CAST" is not copyable
• KT-45866 Default parameter with generic in expect-actual declarations

Libraries

• KT-43701 Stdlib: Expand KDoc of inc() and dec() for operators

Middle-end. IR

• KT-36880 K/N IR: Reference to expect property in actual declaration is not remapped
• KT-45236 JVM / IR: "IllegalStateException: Symbol with IrTypeParameterSymbolImpl is unbound" caused by contracts and sealed class

Native

• KT-33175 IR: String constants with incorrect surrogate pairs aren't preserved du...

Kotlin 1.5.10

How to update to a new release

Changelog

Compiler

Fixes

• KT-41078 Incorrect type substitution in contracts with type parameters
• KT-44770 JVM / IR: "IllegalArgumentException: Unrecognized Type: [null]" Jackson doesn't recognize type
• KT-45084 JVM IR: "NoSuchElementException: Sequence contains no element matching the predicate" when inline class is passed to lambda with >22 parameters
• KT-45779 JVM / IR: java.lang.NoSuchMethodError: 'int java.lang.Integer.plus(int)' caused by function reference
• KT-45941 JVM IR: local functions use generic type parameters of the outer class in the bytecode, which breaks Bytebuddy and MockK
• KT-46149 Generate synthetic classes for SAM adapters with erased instead of generic supertype
• KT-46189 JVM IR: tailrec function with capturing lambda in default parameter value leads to NoSuchMethodError at runtime
• KT-46214 JVM / IR: "IllegalStateException: No mapping for symbol: VALUE_PARAMETER INSTANCE_RECEIVER" on a suspend function in an inner class
• KT-46238 JVM IR: BootstrapMethodError in JDK 11+ on intersection type passed in arguments of SAM adapter where SAM interface's type parameter has a non-trivial upper bound
• KT-46259 JVM IR: local function for adapted function reference is not declared as ACC_SYNTHETIC
• KT-46284 JVM IR: "Unbound private symbol IrClassSymbol" on class reference to script class
• KT-46402 IllegalAccessError: "CapturedLambdaInterpreter (in unnamed module @0x71b06418) cannot access class jdk.internal.org.objectweb.asm.Type" caused by inline function with a suspend parameter in Maven project
• KT-46408 JVM IR: BootstrapMethodError due to missing bridge for subclass of generic Java interface
• KT-46426 JVM IR: Corrupted .class file when passing Array constructor reference as (inline) lambda
• KT-46455 OOM on parsing invalid code with string interpolation
• KT-46503 JVM IR: "AssertionError: Unexpected variance in super type argument: out @1"
• KT-46505 JVM IR: NullPointerException caused by a callable reference with nullable inline value class parameter
• KT-46512 JVM / IR: NoSuchMethodError on SAM conversion of a function reference
• KT-46515 IndexOutOfBoundsException: "Empty list doesn't contain element at index 0." on bad variable name in 1.5.0
• KT-46516 JVM IR: "AnalyzerException: Expected I, but found R" on subclassing AbstractMutableList
• KT-46524 Cannot use unsigned literals with api-version < 1.5 even with opt-in
• KT-46537 JVM / IR: "IllegalStateException: No noarg super constructor for CLASS" caused by "No-arg" plugin with annotation on child class
• KT-46540 JVM / IR: AnalyzerException: Expected an object reference, but found J caused by java.function.Supplier
• KT-46554 JVM IR: "IllegalStateException: No mapping for symbol: VAR IR_TEMPORARY_VARIABLE" with value class constructor delegation call
• KT-46555 JVM IR: IllegalAccessError when using Java method reference
• KT-46562 Kotlin 1.5.0 generates non-serializable lambdas when they should be serializable
• KT-46568 JVM IR: "AssertionError: IrCall expected inside JvmStatic wrapper" on compiling protected static function with return type Nothing inside companion object of abstract class
• KT-46574 JVM / IR: ClassCastException caused by runBlocking awaiting call while returning Kotlin.Result type.
• KT-46579 JVM IR: "IllegalArgumentException: Sequence contains more than one matching element" for Java enum with overloaded values() static method
• KT-46584 JVM IR: Intrinsics.needClassReification (UnsupportedOperationException thrown). Property delegate provider crossinline lambda inlining/reification issue
• KT-46751 JVM / IR:"ClassCastException: java.lang.String cannot be cast to java.lang.Void" in extension function in Kotlin 1.5

IDE

• KT-45981 failed to analyze: java.lang.AssertionError: diagnostic callback has been already registered: Code analysis get stuck in AS 2020.3.1.14 & Kotlin v1.5.0-M2
• KT-46622 60+ second freezes with Kotlin plugin 1.5.0: GetModuleInfoKt.findJvmStdlibAcrossDependencies

IDE. Gradle Integration

• KT-46417 [UNRESOLVED_REFERENCE] For project to project dependencies of native platform test source sets

Libraries

• KT-46280 JvmRecord annotation missing constructor in common

Middle-end. IR

• KT-44013 NPE: When calling constructor of a function type while inheriting from it, despite it's an interface

Tools. Android Extensions

• KT-46590 Kotlin Android Extensions 1.5.0 generates bad writeToParcel() method for nullable Array types

Tools. Gradle

• KT-41142 Kotlin version conflict when using Kotlin Gradle plugins in pre-compiled script plugin
• KT-46353 Optimizations disabled in Gradle 7 for KAPT when generating sources
• KT-46368 Memory leak with 1.5.0-RC when building with Gradle
• KT-46689 Track -Xuse-old-backend flag usage

Tools. Gradle. JS

• KT-46006 KJS \ Gradle: Task without declaring an explicit or implicit dependency on jsGenerateExternalsIntegrated in Gradle 7
• KT-46162 KJS: Exported items unavailable on dev server
• KT-46331 KJS: With kotlin.js.webpack.major.version=4 browserXRun tasks fail

Tools. Parcelize

• KT-46567 Kotlin 1.5.0 parcelize compilation fails in new backend when using TypeParceller with nested generics

Tools. kapt

• KT-45532 Do not create Kapt stubs directory during configuration time

Checksums

File	Sha256
kotlin-compiler-1.5.10.zip	2f8de1d73b816354055ff6a4b974b711c11ad55a68b948ed30b38155706b3c4e
kotlin-native-linux-1.5.10.tar.gz	0463222fb84e0f997e3c71af89ed1d1c4b3b9894cafffe5fc0ba1f125cf362ea
kotlin-native-macos-1.5.10.tar.gz	bc227baad4a4c8b5cdf0b1a08fa3fb59132043f2ea88e2343c5f25584f5de3cd
kotlin-native-windows-1.5.10.zip	e0816d91da9c4c38b3ef8891033185cb183f4a901054c9f17a9c72295ed40324

Kotlin 1.5.0

Changelog

Backend. Native

• KT-42053 Support compiler caches for linux_x64
• KT-43690 Support compiler caches for ios_arm64

Backend. IR

• KT-42684 StackOverflowError on recursive inline arguments in inline fun

Compiler

New Features

• KT-28791 Kotlin serialization with inline classes
• KT-30222 Support JVM target version selection in Kotlin bytecode tool window
• KT-41884 Support 'file' target for JvmSynthetic annotation
• KT-43677 Support for Java records
• KT-43920 Support loading binary Java annotations on fields
• KT-44278 Generate SAM-converted lambdas and function references using 'invokedynamic' on JDK 1.8+
• KT-44650 Deprecate JVM target version 1.6
• KT-44787 Suspend functions in fun interfaces
• KT-44865 Allow to declare protected constructors in sealed classes
• KT-44869 Compiling sealed interface with version less than 1.5: error message from future could be provided

Performance Improvements

• KT-6336 Optimize generation of local functions
• KT-7307 Optimize infix call of String.plus
• KT-18692 Optimize '<optimizable_range> step x' for-in loop
• KT-19978 Inefficient bytecode generated for function references undergoing Java SAM conversion
• KT-23565 OperationsMapGenerated.kt generates unreasonable amount of bytecode
• KT-23825 Tail suspend call utilizing elvis operator does not take advantage of suspend tail call optimization
• KT-23826 A suspend function on the right side of a returned || condition is not tail call optimized
• KT-25348 No compile time unsigned integer conversion when using hex literal
• KT-26060 Support a compiler mode to compile lambda expressions using invokedynamic instruction
• KT-26590 Do not generate create method for suspend lambdas if its arity >= 2
• KT-27427 Optimize nullable check introduced with 'as' cast
• KT-28246 Redundant boxing/unboxing isn't eliminated by the compiler in case of inline classes and javaClass intrinsic
• KT-30605 Constant folding doesn't evaluate inv() function
• KT-36845 Generate enum-based TABLESWITCH/LOOKUPSWITCH on a value with smart cast to enum in JVM_IR
• KT-39585 JVM BE generates redundant accessor calls when accessing static final field lifted from companion
• KT-40886 Old JVM BE unspills ACONST_NULL from continuation
• KT-42621 Kotlin binary size considerably larger for code extensively using stream API
• KT-44153 NI: Low Memory and IntelliJ hangs when quotes in split() are missed
• KT-45410 JVM / IR: Extreme performance regression on arithmetic operations inside a loop

Fixes

• KT-6007 Support changed return type of inlined generic function when lambda returns anonymous object
• KT-6055 Failed invoke plus assign on array element accessed via several args through local get/set convention extensions
• KT-6879 CompilationException when local classes hierarchy is placed within other local or inner declaration
• KT-8120 NoSuchMethodError on local class constructor call inside a local class
• KT-8199 "Cannot pop operand off an empty stack" for local class using a captured variable as default value for constructor parameter
• KT-10835 "AssertionError: Non-outer parameter incorrectly mapped to outer" when inlining object literal extending inner class
• KT-12790 Don't generate synthetic accessors for private inline function/properties
• KT-13213 IllegalArgumentException in ByteVector.putUTF8 on attempt to compile file with moderately long string literal
• KT-14628 "UnsupportedOperationException: Don't know how to generate outer expression" for nested class inheriting from inner class with a companion object
• KT-14833 JVM internal error: Augment assignment and increment are not supported for local delegated properties and inline properties
• KT-15403 Suspend operator get wrong code generated by BE (NoSuchMethodError)
• KT-15404 Suspend operator set wrong code generated
• KT-16084 Proguard can't find enclosing class of let closure inside apply closure
• KT-16151 Internal compiler error when using plusAssign operator with mutable map
• KT-16221 Support in/!in suspend operators
• KT-16282 "Cannot pop operand off an empty stack" for plusAssign with default parameters in setter operator
• KT-16445 java.lang.VerifyError: Bad type on operand stack when delegating an interface through a private reified function inside an object
• KT-16520 Invalid bytecode semantics for set call by convention with default parameters
• KT-16567 Inliner creates redundant objects on source inlining
• KT-16752 Delegating function interface to function reference does not work
• KT-17554 Incorrect cast to Unit generated on annotated when-expression with a single-branch if inside
• KT-17738 Java cannot extend class implementing kotlin.collections.Map
• KT-17753 Strange behavior of if and return statements
• KT-18583 "ISE: Recursive call in a lazy value" for generic sealed class with nested subclass in a when(this) with inferred return type
• KT-19861 "IllegalStateException: Label wasn't found during iterating through instructions" for plusAssign with safe call
• KT-20306 Make 'when' over an 'expect' enum class non-exhaustive
• KT-20869 kotlin.jvm.internal.DefaultConstructorMarker should be public
• KT-20996 IllegalStateException: Cannot get FQ name of local class: class in metadata serialization for common code
• KT-21014 Incorrect bytecode generated for 'PrimitiveArray::size'
• KT-21092 Reference javaClass for generic property: "couldn't transform method node: get()"
• KT-21778 "IllegalStateException: Couldn't build context" for inline function inside an anonymous object
• KT-21900 VerifyError on equals on generic primitive type
• KT-22098 "UnsupportedOperationException: Don't know how to generate outer expression" on extension function call inside lambda in anonymous object super constructor call
• KT-22488 Bad line numbers generated for '&&' expression
• KT-22972 A compiler bug(?) in Number class descendants
• KT-23619 Transform stateless singleton lambda during inline
• KT-23881 Declaration of lambda in inlined apply block holds reference to superfluous references causing leak
• KT-24135 Calling invoke on crossinline suspend lambda leads to no state-machine
• KT-24193 NoClassDefFoundError: java/lang/Cloneable$DefaultImpls on inheritance from Cloneable through an interfac...

Kotlin 1.5.0-RC

Changelog

Compiler

New Features

• KT-28791 Kotlin serialization with inline classes
• KT-43920 Support loading binary Java annotations on fields

Performance Improvements

• KT-44153 NI: Low Memory and IntelliJ hangs when quotes in split() are missed
• KT-45410 JVM / IR: Extreme performance regression on arithmetic operations inside a loop

Fixes

• KT-35224 It's possible to pass non-spread arrays after arguments with SAM-conversion
• KT-36853 IR: UninitializedPropertyAccessException on tailrec with object expression in default argument
• KT-41056 Increase stub version due to new "contract" keyword
• KT-43887 Problem with FunctionReferenceLowering$FunctionReferenceBuilder in kotlin native
• KT-44210 KJS / IR: "AssertionError: Undefined parameter referenced: defined" caused by plus assign operators in build blocks
• KT-44947 Sealed interfaces: Sealed fun interface leads to "NoWhenBranchMatchedException"
• KT-44993 JVM IR: VerifyError on getfield with Kotlin generic field and elvis operator
• KT-45139 Inline class: AssertionError: Expected top level inline class
• KT-45195 JVM IR: annotation methods are generated as default interface methods if allopen is used
• KT-45446 JVM / IR: NullPointerException caused by unreachable code and comparison
• KT-45721 JVM / IR: "Unbound symbols not allowed" caused by class reference in sequence lambda
• KT-45853 JVM / IR: "Accidental override" caused by inheriting Throwable.getCause from Java interface
• KT-45861 Turning warnings into errors for calls with type parameters annotated by @OnlyInputTypes
• KT-45868 JVM IR: ClassCastException with SAM function in init block when SAM is generated via invokedynamic
• KT-45920 JVM IR: "Accidental override" on redefining get() in custom Map class
• KT-45963 JVM / IR: "AbstractMethodError: Receiver class does not define or inherit an implementation of the resolved method" in Dokka tests
• KT-45967 JVM IR: "IllegalAccessError" with invokedynamic to Java SAM over callable reference to private function
• KT-45982 Wrong subtyping result on captured types with postponed type variables

IDE. Inspections and Intentions

• KT-38155 Lift assignment out of 'if' produces type mismatch without manually adding a semicolon

JavaScript

• KT-44796 KJS / IR: default parameter of function with @JsName leads to "RangeError: Maximum call stack size exceeded"

Libraries

• KT-39177 Make CharCategory available in common multiplatform code
• KT-43772 Kotlin/Native unfinished workers detected.

Tools. Gradle

• KT-43605 Kotlin Gradle Plugin 1.4.20 undeclared system property reads cause problems with Gradle configuration cache enabled
• KT-44462 Kotlin Gradle plugin creates compile configuration with Gradle 7.0
• KT-44949 Compatibility with Gradle 7.0
• KT-44957 gradle - target.compilations seems to be deprecated
• KT-45340 Update minimal supported version of Kotlin Gradle Plugin to 6.1

Tools. Gradle. Multiplatform

• KT-44900 Support gradle configuration cache with kotlin.multiplatform plugin

Tools. kapt

• KT-43686 KaptWithoutKotlincTask should use @CompileClasspath for kotlinStdlibClasspath for cache relocateability.
• KT-44130 KAPT changes field order in 1.4.30-M1

Checksums

File	Sha256
kotlin-compiler-1.5.0-RC.zip	91a82ea9ff1b49ef1c342d52b3fe54fed92aa79201ee0d452fe9b72e698ea98b
kotlin-native-linux-1.5.0-RC.tar.gz	6336cf1d360bd62adfffb4442a31e06150721cc767c76eca2830e9e45eed9bbc
kotlin-native-macos-1.5.0-RC.tar.gz	2d868b738b77ca290ea4c714669e31ed29f3befbb71aa0d0b4b0ad1ebddf1a9d
kotlin-native-windows-1.5.0-RC.zip	dd3c6bec6aa1b50e1764484406d450d4ae491169a47add5e2174e82de73e567d

Kotlin 1.5.0-M2

Changelog

Compiler

New Features

• KT-30222 Support JVM target version selection in Kotlin bytecode tool window
• KT-41884 Support 'file' target for JvmSynthetic annotation
• KT-44278 Generate SAM-converted lambdas and function references using 'invokedynamic' on JDK 1.8+

Performance Improvements

• KT-26060 Support a compiler mode to compile lambda expressions using invokedynamic instruction
• KT-42621 Kotlin binary size considerably larger for code extensively using stream API

Fixes

• KT-20306 Make 'when' over an 'expect' enum class non-exhaustive
• KT-20869 kotlin.jvm.internal.DefaultConstructorMarker should be public
• KT-26592 Do not generate private suspend functions as synthetic package-private
• KT-38100 Support local delegated properties (not inlined) in new JVM default modes
• KT-40392 Deprecate JvmDefault annotation and old -Xjvm-default modes
• KT-41758 Deprecate kotlin.Metadata.bytecodeVersion and avoid using it in the compiler
• KT-42092 JVM / IR: "AnalyzerException: Argument 1: expected R, but found J" when trying to add to ArrayList the result of a function applied to int
• KT-42321 JVM IR: do not cast integer value based on the type of a literal receiver of an operator call
• KT-42404 "Supertypes of the following classes cannot be resolved" in Rider project
• KT-42472 No TYPE_INFERENCE_UPPER_BOUND_VIOLATED for Delegated Properties do not check types (in Kotlin 1.4.10)
• KT-43167 JVM IR, serialization: "No mapping for symbol: VALUE_PARAMETER INSTANCE_RECEIVER" with data class containing property defined in body
• KT-43303 NI: False negative TYPE_INFERENCE_UPPER_BOUND_VIOLATED when inferred type argument is not a subtype of type parameter upper bound
• KT-44368 "IllegalStateException: Error type encountered" when inlining 'invoke' operator without enough information on type variable
• KT-44412 JVM IR backend fails to compile break in condition of do while
• KT-44471 Fix failing script tests after switching to 1.5
• KT-44474 Compiler expects sealed type inheritors from platform specific source-sets in when expression in common source-set
• KT-44483 JVM IR: CCE on calling generic vararg function reference with Array expected type
• KT-44550 KotlinBinaryClassCache leaks Kotlin plugin classloader on plugin unload
• KT-44546 NI: changed variable fixation order (that can lead to changed resolution)
• KT-44583 "Supertypes of the following classes cannot be resolved" error message gives no context
• KT-44627 JVM IR: ACCIDENTAL_OVERRIDE when overriding a generic field where the type parameter has a primitive bound
• KT-44703 JVM / IR: "IllegalStateException: Unhandled special name in mangledNameFor" caused by a reference to inline class inside interface's companion with lazy initialization
• KT-44714 Debugger / Coroutines: Local variables are trimmed out too aggressively
• KT-44722 JVM IR: ClassCastException with inline class, let and bound function reference
• KT-44726 JVM IR: Incorrect KType nullability for platform type reified as non-null
• KT-44798 JVM IR: Inherited platform declarations clash for class implementing both List and Set
• KT-44801 1.4.30 JVM IR: Unbound symbols not allowed with anonymous object
• KT-44803 FIR bootstrap: incorrect nullability is set for type alias-based type
• KT-44827 Non-existing outer class is written in anonymous class for SAM wrapper in inline lambda with capture
• KT-44878 JVM_IR: "IllegalStateException: Unexpected types" when checking non-nullable variable is in range between nullable ones with smart-cast
• KT-44926 MPP: Actual typealias to compiled inline class incompatible with expect inline class
• KT-44974 LambdaConversionException in case of SAM-converted captuing extension lambda
• KT-45008 JVM IR: hashCode is generated as invokeinterface if smart cast to interface is present
• KT-45011 JVM / IR: "AssertionError: Unbound symbols not allowed"
• KT-45022 IR: "AssertionError: Undefined variable referenced" from psi2ir caused by plusAssign operator of object
• KT-45064 JVM IR: "java.lang.AssertionError: SyntheticAccessorLowering should not attempt to modify other files!" with member reference to property in another file with private setter
• KT-45069 JVM / IR: New SAM conversions mode fails when converting from Unit to Any
• KT-45131 JVM / IR: "RuntimeException: Lambda, SAM or anonymous object should have only one constructor" caused by inline class that type cast to reified type parameter inside lambda in inline function
• KT-45243 "IllegalStateException: Lambdas shouldn't be visited by ESExpressionVisitor" caused by lambda inside kotlin.test.assertNotNull
• KT-45259 JVM: ClassCastException caused by Result as lambda parameter type
• KT-45292 AssertionError with recursive inline extension property
• KT-45300 Deprecate super calls in public-api inline functions
• KT-45409 Rename jspecify annotations’ package and default not null annotation

IDE

• KT-44487 MPP, IDE: No error in IDE when sealed class inheritor from common source-set is not used in exhaustive when expression in platform source-set
• KT-45254 Highlighting for files with certain errors appears only on second opening

IDE. Decompiler, Indexing, Stubs

• KT-43699 IDE: Unresolved extension method from Java code for simple class with typealias and generics (IllegalStateException: Unknown type parameter)
• KT-44756 Infinite "UpToDateStubIndexMismatch: PSI and index do not match." with IDEA 2021.1 EAP upon attempt to open "org.gradle.configurationcache" even they seem to be the same

IDE. Gradle Integration

• KT-37127 Implement precise importing of platforms of root source sets (commonMain/commonTest) when hierarchical multiplatform support is enabled

IDE. Misc

• KT-44675 Incorrect reference to resource into 202 plugin

IDE. Refactorings

• KT-44839 Sealed interfaces: move refactoring warnings works with "more freedom for sealed classes" rules for language level < 1.5

IDE. Script

• KT-43288 Allow push notifications about script configuration /dependencies changes via the ScriptDefinitionsProvider EP

JavaScript

• KT-39272 KJS / IR: Can't use javascript keywords as JsName
• KT-41650 JS IR BE: default should be a reserved identifier
• KT-44433 KJS IR: support function interfaces with suspend member
• KT-45059 KJS / IR: Add possibility for runtime diagnostics of DCE result

Libraries

• KT-12109 Add stdlib method that combines mapNotNull() and first/firstOrNull()
• KT-26234 Floored division and remainder function for numeric types
• KT-32996 kotlin.test: add assertContentEquals for comparing content of arrays, iterables, sequences
• [KT-42071](https://youtrack.jetbrains.com/issue/...

Kotlin 1.4.32

Changelog

IDE

• KT-43824 KtLightClassForSourceDeclaration#isInheritor works in a different way than java implementation
• KT-45287 LightClasses: KtLightSimpleModifierList is no more a parent of KtLightAnnotationForSourceEntry
• KT-45291 LightClasses: can't get annotations for constructor val-parameter
• KT-45417 ULC leakage of primitive type annotations

Tools. CLI

• KT-44758 kotlin-compiler-embeddable dependency includes unshaded fastutil package
• KT-45007 Concurrent Kotlin script compilation/execution results in NullPointerException in KeyedExtensionCollector.getPoint()

Checksums

File	Sha256
kotlin-compiler-1.4.32.zip	dfef23bb86bd5f36166d4ec1267c8de53b3827c446d54e82322c6b6daad3594c
kotlin-native-linux-1.4.32.tar.gz	3712fab4c60484fd8b5538dd018a0023033cb3ea38d2a3023c79b342e4e8b24d
kotlin-native-macos-1.4.32.tar.gz	a55eb3c60bb9810360c5a992dca34328d806fe13f3bfc3120b49345f569fd3cc
kotlin-native-windows-1.4.32.zip	3bd6f1b9293897a45d0b33ee14ca51b33b57d0413b774458c6e4aee393e1b772

Kotlin 1.5.0-M1

You could find information about EAP program and setup instructions here

Changelog

Backend. Native

• KT-42053 Support compiler caches for linux_x64
• KT-43690 Support compiler caches for ios_arm64

Compiler

New Features

• KT-42522 Enable string concatenation via invokedynamic by default for JVM target 9 and above
• KT-43677 Support for Java records
• KT-44650 Deprecate JVM target version 1.6
• KT-44787 Suspend functions in fun interfaces
• KT-44865 Allow to declare protected constructors in sealed classes
• KT-44869 Compiling sealed interface with version less than 1.5: error message from future could be provided

Performance Improvements

• KT-6336 Optimize generation of local functions
• KT-7307 Optimize infix call of String.plus
• KT-18692 Optimize '<optimizable_range> step x' for-in loop
• KT-19978 Inefficient bytecode generated for function references undergoing Java SAM conversion
• KT-23565 OperationsMapGenerated.kt generates unreasonable amount of bytecode
• KT-23825 Tail suspend call utilizing elvis operator does not take advantage of suspend tail call optimization
• KT-23826 A suspend function on the right side of a returned || condition is not tail call optimized
• KT-25348 No compile time unsigned integer conversion when using hex literal
• KT-26590 Do not generate create method for suspend lambdas if its arity >= 2
• KT-27427 Optimize nullable check introduced with 'as' cast
• KT-28246 Redundant boxing/unboxing isn't eliminated by the compiler in case of inline classes and javaClass intrinsic
• KT-30605 Constant folding doesn't evaluate inv() function
• KT-36845 Generate enum-based TABLESWITCH/LOOKUPSWITCH on a value with smart cast to enum in JVM_IR
• KT-39585 JVM BE generates redundant accessor calls when accessing static final field lifted from companion
• KT-40886 Old JVM BE unspills ACONST_NULL from continuation

Fixes

• KT-6007 Support changed return type of inlined generic function when lambda returns anonymous object
• KT-6055 Failed invoke plus assign on array element accessed via several args through local get/set convention extensions
• KT-6879 CompilationException when local classes hierarchy is placed within other local or inner declaration
• KT-8120 NoSuchMethodError on local class constructor call inside a local class
• KT-8199 "Cannot pop operand off an empty stack" for local class using a captured variable as default value for constructor parameter
• KT-10835 "AssertionError: Non-outer parameter incorrectly mapped to outer" when inlining object literal extending inner class
• KT-12790 Don't generate synthetic accessors for private inline function/properties
• KT-13213 IllegalArgumentException in ByteVector.putUTF8 on attempt to compile file with moderately long string literal
• KT-14628 "UnsupportedOperationException: Don't know how to generate outer expression" for nested class inheriting from inner class with a companion object
• KT-14833 JVM internal error: Augment assignment and increment are not supported for local delegated properties and inline properties
• KT-15403 Suspend operator get wrong code generated by BE (NoSuchMethodError)
• KT-15404 Suspend operator set wrong code generated
• KT-16084 Proguard can't find enclosing class of let closure inside apply closure
• KT-16151 Internal compiler error when using plusAssign operator with mutable map
• KT-16221 Support in/!in suspend operators
• KT-16282 "Cannot pop operand off an empty stack" for plusAssign with default parameters in setter operator
• KT-16445 java.lang.VerifyError: Bad type on operand stack when delegating an interface through a private reified function inside an object
• KT-16520 Invalid bytecode semantics for set call by convention with default parameters
• KT-16567 Inliner creates redundant objects on source inlining
• KT-16752 Delegating function interface to function reference does not work
• KT-17554 Incorrect cast to Unit generated on annotated when-expression with a single-branch if inside
• KT-17738 Java cannot extend class implementing kotlin.collections.Map
• KT-17753 Strange behavior of if and return statements
• KT-18583 "ISE: Recursive call in a lazy value" for generic sealed class with nested subclass in a when(this) with inferred return type
• KT-19861 "IllegalStateException: Label wasn't found during iterating through instructions" for plusAssign with safe call
• KT-20996 IllegalStateException: Cannot get FQ name of local class: class in metadata serialization for common code
• KT-21014 Incorrect bytecode generated for 'PrimitiveArray::size'
• KT-21092 Reference javaClass for generic property: "couldn't transform method node: get()"
• KT-21778 "IllegalStateException: Couldn't build context" for inline function inside an anonymous object
• KT-21900 VerifyError on equals on generic primitive type
• KT-22098 "UnsupportedOperationException: Don't know how to generate outer expression" on extension function call inside lambda in anonymous object super constructor call
• KT-22488 Bad line numbers generated for '&&' expression
• KT-22972 A compiler bug(?) in Number class descendants
• KT-23619 Transform stateless singleton lambda during inline
• KT-23881 Declaration of lambda in inlined apply block holds reference to superfluous references causing leak
• KT-24135 Calling invoke on crossinline suspend lambda leads to no state-machine
• KT-24193 NoClassDefFoundError: java/lang/Cloneable$DefaultImpls on inheritance from Cloneable through an interface
• KT-24305 ClassNotFoundException when using Java reflection on local class in an inlined lambda
• KT-24564 Custom operator fun set on ByteArray resolves properly but is miscompiled
• KT-25400 "NoClassDefFoundError: kotlin/KotlinPackage" with Turkish system locale on macOS
• KT-26130 Incorrect method signature for a generic function with inline class as a type parameter upper bound
• KT-26360 "Method from super interface has a different signature" for Interface that extends both interfaces with and without @JvmDefault
• KT-26473 Error on compiling inline class with calls of super methods equals(), hashCode(), toString()
• KT-26474 VE “Bad type on operand stack” at runtime on calling toString() method of inline class with calls of super methods (toString(), equals(), hashCode()) inside
• KT-27449 NoSuchMethodError for local suspend function with suspend lambda parameter with default value
  ...

Kotlin 1.4.31

1.4.31

Compiler

• KT-39776 2020.3+: Unresolved reference to Kotlin stdlib function

IDE. Gradle Integration

• KT-44845 After update to Kotlin 1.4.30 all external dependencies is unresolved in IDE with kotlin.mpp.enableGranularSourceSetsMetadata=true

IDE. Gradle. Script

• KTIJ-11137 build.gradle.kts: Fatal error during save/load standalone scripts settings
• KTIJ-898 Unable to import with Kotlin DSL buildscript - NullPointerException in KotlinDslScriptModelProcessorKt.toListOfScriptModels

IDE. Multiplatform

• KTIJ-1200 KotlinIconProviderKt.addExpectActualMarker takes up to 180+ seconds

IDE

Fixes

• KT-44697 New JVM IR backend notification - narrow its triggering to Kotlin projects
• KT-44523 IDE notification for trying new JVM backend
• KTIJ-696 Freeze during startup of IDEA with intellij project with Kotlin (211-1.4.10-release-IJ1440)

Checksums

File	Sha256
kotlin-compiler-1.4.31.zip	b50e7016febf7510325d685ae69cc62f49a7ca7f670cb4e0888112e3ec09c6ec *
kotlin-native-linux-1.4.31.tar.gz	87fc40385ffbd44eebde6487d15e1c5c67c218870b332b525e122f014b7de3e3
kotlin-native-macos-1.4.31.tar.gz	0e351756b382096204d61456f855480ce6b65ac53897c4bfa78a287895f37e32
kotlin-native-windows-1.4.31.zip	a60aec97fd21294ab11e57acdd33d37d79db11b22656fa435b791e9a709727b4

* Sorry, Sha256 sum was initially published incorrectly. Now it is fixed.