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Kotlin v1.4.20-M2 released!

Kotlin v1.4.20-M2 has been released.

Info about particular features

KT-25960 Kapt: Support new @JvmDefault functionality

KT-40030 Parcelize: Support the new Parcelize plugin in Gradle

KT-41799 String.replace performance improvements

KT-41622 IDE: Kotlin scripting support can’t find context class from same project

CHANGELOG

1.4.20-M2

Android

KT-42121 Deprecate Kotlin Android Extensions compiler plugin

KT-42267 Platform declaration clash error in IDE when using kotlinx.android.parcel.Parcelize

KT-42406 Long or infinite code analysis on simple files modification

Compiler

KT-11713 Refine visibility check for synthetic property with protected setter

KT-21147 JEP 280: Indify String Concatenation (StringConcatFactory)

KT-34178 Scripts should be able to access imports objects

KT-41484 JVM IR: support -Xemit-jvm-type-annotations

KT-42005 JVM / IR: “NullPointerException: Parameter specified as non-null is null” when toString is called on inline class with not primitive property

KT-42450 NI: “IllegalStateException: Error type encountered: NonFixed:” with coroutines

KT-42523 Missed DefaultImpls for interface in -jvm-default=all mode on inheriting it from interface compiled in old scheme

KT-42524 Wrong specialization diagnostic is reported on inheriting from java interface with default with -Xjvm-default=all-compatibility

KT-42546 HMPP: bogus overload resolution ambiguity on using and expect-function declaration with nullable expect in a signature

Docs & Examples

KT-42318 No documentation for kotlin.js.js

IDE

KT-38959 IDE: False negative EXPLICIT_DELEGATION_CALL_REQUIRED, “IllegalArgumentException: Range must be inside element being annotated”

IDE. Debugger

KT-38659 Evaluate Expression: toString() on variable returns error when breakpoint is in commonTest sourceset

IDE. Decompiler, Indexing, Stubs

KT-28732 Stub file element types should be registered early enough

KT-41346 IDE: “AssertionError: Stub type mismatch: USER_TYPE!=REFERENCE_EXPRESSION” with CollapsedDumpParser class from IDEA SDK

KT-41859 File analysis never ending with kotlinx.cli (AssertionError: Stub type mismatch: TYPEALIAS!=CLASS)

IDE. Gradle. Script

KT-41141 Gradle Kotlin DSL: “cannot access ‘java.lang.Comparable’. Check your module classpath” with empty JDK in Project structure

IDE. Inspections and Intentions

KT-38915 “Remove explicit type specification” intention should be disabled in explicit API mode

KT-38981 “Specify return type explicitly” inspection is not reported for declaration annotated with @PublishedApi in Explicit Api mode

KT-39026 ‘Specify return type explicitly’ intention duplicates compiler warning in Explicit api mode

IDE. Script

KT-41622 IDE: Kotlin scripting support can’t find context class from same project

KT-41905 IDE / Script: FilePathPattern parameter in @KotlinScript annotation is not reflected correctly in Pattern / Extension

KT-42206 Cannot load script definitions using org.jetbrains.kotlin.jsr223.ScriptDefinitionForExtensionAndIdeConsoleRootsSource

IDE. Tests Support

KT-37799 Don’t show a target choice in context menu for a test launched on specific platform

IDE. Wizards

KT-42372 Rrename test classes in wizard template to avoid name clashing

JavaScript

KT-38136 JS IR BE: add an ability to generate separate js files for each module and maybe each library

KT-38868 [MPP / JS / IR] IllegalStateException: “Serializable class must have single primary constructor” for expect class without primary constructor with @Serializable annotation

KT-41275 KJS / IR: “IllegalStateException: Can’t find name for declaration FUN” caused by default value in constructor parameter

KT-41627 KJS / IR / Serialization: IllegalStateException: Serializable class must have single primary constructor

KMM Plugin

KT-41522 KMM: exceptions for Mobile Multiplatform plugin are suggested to report to Google, not JetBrains

KT-42065 [KMM plugin] iOS apps fail to launch on iOS simulator with Xcode 12

Libraries

KT-41799 String.replace performance improvements

Native. C and ObjC Import

KT-41250 [C-interop] Stubs for C functions without parameter names should have non-stable names

Native. Platform libraries

KT-42191 Support for Xcode 12

Native. Runtime. Memory

KT-42275 “Memory.cpp:1605: runtime assert: Recursive GC is disallowed” sometimes when using Kotlin from Swift deinit

Native. Stdlib

KT-39145 MutableData append method

Tools. Compiler Plugins

KT-36329 Provide diagnostic in kotlinx.serialization when custom serializer mismatches property type

KT-40030 Move the Parcelize functionality out of the Android Extensions plugin

Tools. Gradle. JS

KT-39838 Kotlin/JS Gradle tooling: NPM dependencies of different kinds with different versions of the same package fail with “Cannot find package@version in yarn.lock”

KT-40202 Kotlin/JS: Gradle: NPM version range operators are written into package.json as escape sequences

KT-40986 KJS / Gradle: BuildOperationQueueFailure when two different versions of js library are used as dependencies

KT-42222 KJS / Gradle: “Cannot find package@version in yarn.lock” when npm dependencies of one package but with different version are used in project

KT-42339 Support dukat binaries generation

Tools. Gradle. Native

KT-40999 CocoaPods Gradle plugin: Support custom cinterop options when declaring a pod dependency.

KT-41844 Kotlin 1.4.10 gradle configuration error with cocoapods using multiple multiplatform modules

Tools. Scripts

KT-37987 Kotlin script: hyphen arguments not forwarded to script

KT-39502 Scripting: reverse order of Severity enum so that ERROR > INFO

KT-42335 No “caused by” info about an exception that thrown in Kotlin Script

Tools. kapt

KT-25960 Interfaces annotated with JvmDefault has wrong modifiers during annotation processing

KT-37732 Kapt task is broken after update to 1.3.70/1.3.71