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 during serialization/deserialization
• KT-44799 Different behavior with functional interfaces in Kotlin/Native on iOS

Native. C Export

• KT-42796 [Reverse C Interop] Package with no public methods generate empty struct in the header, leading to an error

Native. ObjC Export

• KT-45127 KMM: hard to pass an error to Kotlin code from implementation of Kotlin method in Swift code

Native. Runtime. Memory

• KT-45063 Profiling indicates that a lot of time is spent on updateHeapRef on Apple platforms when running KMP code

Reflection

• KT-13490 Equality doesn't work for KProperty.Accessor implementations

Tools. Commonizer

• KT-45497 [Commonizer] c-interop commonization: Dependency commonization
• KT-46077 [Commonizer] Add commonizer_target to commonized klib's manifest
• KT-46107 [Commonizer] CInteropCommonizerTask receives faulty dependencies in multi module projects containing multiple c-interops
• KT-46248 MPP: Compile KotlinMetadata fails with Unresolved reference if only one native platform from shared source set is available

Tools. Compiler Plugins

• KT-7112 Support calling Lombok-generated methods within same module
• KT-45541 JVM / IR / Serialization: NullPointerException caused by "Serializable" annotation and local data class

Tools. Gradle

• KT-43988 Enable plugin validation during build
• KT-45301 Gradle: Empty build/kotlin dir with custom build directory
• KT-45519 loadAndroidPluginVersion() impacts performance negatively and noticeably in multimodule Android build
• KT-45744 Create Kotlin Gradle Plugin JUnit5 basic test setup
• KT-45834 Gradle Plugin read system property related to kotlinCompilerClasspath breaks use of configuration cache

Tools. Gradle. JS

• KT-42911 Support Gradle configuration cache for K/JS tasks
• KT-45294 KJS / Gradle: Number of modules in project affects JS tasks configuration cache state size
• KT-45754 KJS / IR: Remove adding option of source maps in Gradle plugin
• KT-46178 KJS / Dukat: Added as a dependency always without condition

Tools. Gradle. Multiplatform

• KT-36679 MPP Gradle plugin: Improve messaging for the commonizer
• KT-45832 CInteropCommonization: Filter out illegal dependencies

Tools. Gradle. Native

• KT-39016 Missing stdlib when the downloading process was aborted
• KT-44059 iosSimTest tasks are never up-to-date
• KT-45801 compileIosMainKotlinMetadata compilation property of gradle task is not initialized and fails with Execution failed for task ':shared:generateProjectStructureMetadata'

Tools. Incremental Compile

• KT-44741 Incremental compilation: inspectClassesForKotlinIC doesn't determine changes with imported constant

Tools. JPS

• KT-34351 KotlinTargetsIndex creation takes too long even if project doesn't have any kotlin
• KT-45191 [JPS] Marking method as "default" in Java SAM interface doesn't affect dependencies
• KT-46242 Support Lombok kotlin plugin in JPS and maven

Tools. kapt

Performance Improvements

• KT-28901 Consider caching annotation processors classloaders

Fixes

• KT-27123 kapt: missing space in error log makes location non-clickable
• KT-29929 [Kapt] Stub generator uses constant value in method annotation instead of constant name 2.
• KT-32202 Gradle task kaptKotlin fails: "module not found" in Java 11 modular application
• KT-34838 Kapt: 'cannot find symbol' for a top-level property with anonymous delegate
• KT-35104 Support @JvmStatic in KAPT stubs
• KT-37586 KAPT: When delegated property use an unknown type (to-be-generated class), correctTypeError will mess up the $delegate field type
• KT-39060 Kapt: correctErrorTypes don't retain return type of getter in Java stub
• KT-39715 KaptGenerateStubsTask resolves annotation processor options too early (before execution time)
• KT-43804 Kapt fails to preserve parameter names in open suspend functions
• KT-45032 Kapt: NullPointerException: insnList.first must not be null
• KT-46176 Kapt: "java.lang.IndexOutOfBoundsException: Index -1 out of bounds for length 3" with delegation and property reference

Checksums

| File | Sha256 | | --- | --- | | kotlin-compiler-1.5.20-M1.zip | b50394e669651024025c23c53779c75f68d4fc9ab7bfecd58ea5e2c9eda5a390 | | kotlin-native-linux-1.5.20-M1.tar.gz | ef9fb39d2c4bdba16a9ca0849abb26cb6384f444464505087b4a8ebde6ed6103 | | kotlin-native-macos-1.5.20-M1.tar.gz | 84d6f412eaec3b61929310cf45dfff7e230d6d676ffea14014aa99cbd6668222 | | kotlin-native-windows-1.5.20-M1.zip | b9c86df611a63b513f3a327da740007a018012639b6a64b50439fd186bda87bf |