JetBrains/kotlin v1.4.0-rc

Kotlin 1.4.0-rc

on GitHub

Contents

The release contents the JVM version of the Kotlin compiler, and also the Kotlin/Native compiler for the supported platforms: Linux, macOS and Windows.

Changelog

Backend. Native

• KT-40209 java.lang.UnsupportedOperationException: org.jetbrains.kotlin.ir.declarations.impl.IrValueParameterImpl@76484173
• KT-40367 Kotlin/Native-Swift interop (iOS): Array member initialization failing in release builds

Compiler

Fixes

• KT-31025 Type mismatch when callable reference is resolved with a functional expected type and SAM conversion
• KT-37388 Consider relaxing rules about inferring Nothing inside special constructions (if, try, when)
• KT-37717 NI: "IllegalStateException: Error type encountered" with @BuilderInference
• KT-38427 New inference in branched conditions (if, when) results in odd behavior with inconsistent compiler warnings and runtime errors
• KT-38899 NI: False positive IMPLICIT_NOTHING_TYPE_ARGUMENT_IN_RETURN_POSITION leads to NPE
• KT-39468 NI: overload resolution ambiguity between functions passing T and Foo<T> with a contravariant receiver
• KT-39618 NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER: unable to infer generic type on @BuilderInference annotated lambda parameter with receiver type
• KT-39633 NI: Incorrect type parameter instantiation based on contravariant type argument
• KT-39691 NI: Missing SAM conversion for nullable lambda
• KT-39860 Make Kotlin binaries publicly available (set KotlinCompilerVersion.IS_PRE_RELEASE = false)
• KT-39900 NI: Incorrect type inference in a lambda returning Unit
• KT-39925 New JVM default compilation mode doesn't check that JVM target is 1.8
• KT-39943 Write information about all-compatibility mode in metadata
• KT-39953 NI: ClassCastException "cannot be cast to java.lang.Void" with if-else in return statement in ANdroid project
• KT-40045 NI: lambda’s receiver type isn't inferred properly
• KT-40057 NI: provideDelegate org.jetbrains.kotlin.codegen.CompilationException: Back-end (JVM) Internal error: wrong bytecode generated for static initializer
• KT-40060 NI: postponed variable from the builder inference flows to back-end and leads to throw an exception
• KT-40112 Kotlin Gradle DSL: COMPATIBILITY_WARNING on kotlin.sourceSets block
• KT-40113 Kotlin Gradle DSL: "Expression 'main' cannot be invoked as a function" for distributions.main DSL block
• KT-40128 Introduce compiler key to disable compatibility resolution mechanism for new inference features
• KT-40151 NI: postponed variable isn't substituted for top-level CR inside builder inference
• KT-40214 AbstractMethodError in gradle subplugin which is used in Android app
• KT-40234 Deprecation level "hidden" has no effect on callable reference argument
• KT-40247 NI: false positive "function should be called from coroutine or another suspend function" for suspend invoke operator in try-catch
• KT-40254 Rewrite at slice with two callable reference arguments
• KT-40269 NI: "disabled Unit conversions" error has appeared on green code
• KT-40337 NI: false positive "function should be called from coroutine or another suspend function" for suspend invoke operator in when block
• KT-40406 Prohibit reflection on adapted callable references

IDE

• KT-39968 Paths in KotlinJavaRuntime library aren't updated after you run IDE from a different directory
• KT-39989 NullPointerException when opening Kotlin facets in Project Structure dialog in IDEA 192
• KT-40311 Create change_notes for 1.4 in IDE plugin description

IDE. Debugger

• KT-39808 (CoroutineDebugger) Doesn't start with kotlinx-coroutines-core >= 1.3.6
• KT-40073 (CoroutineDebugger) Change minimum supported kotlinx.coroutines version to 1.3.8*
• KT-40172 Restored frame variables isn't shown for suspended coroutines

IDE. Gradle Integration

• KT-38744 No dependency between Android test and commonTest source sets with kotlin.mpp.enableGranularSourceSetsMetadata=true
• KT-39037 'None of the consumable configurations have attributes' in MPP IDE import with transitive project dependency on self

IDE. Gradle. Script

• KT-31137 IntelliJ would get very slow when editing gradle buildSrc(using the kotlin dsl)
• KT-36078 Gradle Kotlin script context is not reloaded when gradle/wrapper/gradle-wrapper.properties file is changed
• KT-39317 ISE “Calling invokeAndWait from read-action leads to possible deadlock.” on importing simple Gradle-based project in nightly IJ

IDE. Inspections and Intentions

• KT-28662 Inspection to flag usage of the wrong Transient annotation on Kotlin Serializable class
• KT-34209 Switch default behaviour in 1.4 for insertion (to build script) via quick fix of the compiler option enabling inline classes
• KT-36131 Suggest to add a missing module dependency on an unresolved reference in Kotlin code
• KT-37462 Add "Add dependency to module" quickfix in multimodule Maven project
• KT-39869 Add whole project migration usages of kotlin.browser.* & kotlin.dom.* to kotlinx.browser.* & kotlinx.dom.* respectively

IDE. Wizards

• KT-40004 New Project wizard 1.4+: no https://dl.bintray.com/kotlin/kotlinx repository is added for kotlinx-html
• KT-40037 New Project wizard: update Ktor version
• KT-40092 Wizard: the templates panel on mac OS is too wide
• KT-40232 New Wizard: Android Sdk path doesn't have backslash escaping on Windows
• KT-40371 New Project Wizard: Frontend Application / Library results in broken run configuration
• KT-40377 New Project Wizard: Frontend Application defines NPM dependencies that are unnecessary with Kotlin 1.4-RC+
• KT-40378 New Project Wizard: Frontend Application, Disabling JavaScript test framework has no effect
• KT-40407 Wizard: do not add stdlib by default for Gradle projects in wizard

JS. Tools

• KT-39984 Update dukat version in toolchain near to release of 1.4-RC

JavaScript

• KT-32186 Make sure K/JS Reflection API documentation is correct and fix it.
• KT-37563 K/JS: stacktrace is not captured for exceptions without primary constructor inherited from Exception/Error
• KT-37752 Generated typescript incorrect for constructors of derived classes
• KT-37883 KJS: Generated TypeScript uses 'declare' rather than 'export'
• KT-38771 JS: support non-reified type parameters in typeOf
• KT-39873 Update Kotlin JavaScript wrappers due to NON_EXPORTABLE_TYPE diagnostic introduction
• KT-40126 [JS / IR] NPE while compiling interfaces with invoke which is passed as a delegate
• KT-40216 KJS / IR: AssertionError caused by an anonymous object in the dependency project

Libraries

• KT-33069 StringBuilder common functions
• KT-35972 Add contract to builder functions
• KT-37101 Mark following api with DeprecatedSinceKotlin("1.4")
• KT-38360 Make sure that JB libraries correctly define their npm deps and republish them (after KT-30619)
• KT-38817 'capitalize' should convert digraphs to title case
• KT-40168 Remove StringBuilder.capacity from common and JS parts

Middle-end. IR

• KT-40520 Assert during fake-override generation

Tools. Commonizer

• KT-40199 Commonizer loses nullability of abbreviated types

Tools. Compiler Plugins

• KT-40036 Add diagnostic that shows is serialization plugin compatible with serialization-runtime

Tools. Gradle

• KT-39755 [KJS / Gradle / Legacy mode] Directory with whitespace is not processed
• KT-39809 Kotlin Gradle plugin: ServiceConfigurationError: org.jetbrains.kotlin.gradle.plugin.KotlinGradleSubplugin: Provider org.jetbrains.kotlin.gradle.internal.AndroidSubplugin not a subtype
• KT-39977 Collect statistics of used -Xjvm-default options
• KT-40300 Fail the build if in MPP plugin no targets configured

Tools. Gradle. JS

• KT-38170 Investigate how to improve migration experience from pre 1.4.0 DSL to the new one
• KT-39654 Default CSS settings in webpack has priority over user's settings
• KT-39842 Kotlin/JS Gradle DSL: peerNpm dependency fails
• KT-40048 [Gradle, JS] Deprecate kotlin-frontend plugin
• KT-40067 [Gradle, JS] Public package.json for mixed JS/TS project
• KT-40210 Fail the build when Kotlin/JS target is not (properly) configured
• KT-40320 Gradle JS: make migration to the new Gradle DSL smoother

Tools. Gradle. Multiplatform

• KT-32239 Custom configurations inside Kotlin JVM Gradle projects can't properly resolve multiplatform dependencies
• KT-39897 [Commonizer] Fast-pass for library fragments absent for some targets

Tools. J2K

• KT-39739 J2K: Access is allowed from event dispatch thread with IW lock only

Tools. kapt

• KT-34604 KAPT: Flaky NPE through org.jetbrains.kotlin.kapt3.base.ProcessorLoader.doLoadProcessors
• KT-36302 TypeTreeVisitor.visitMemberSelect IllegalStateException: node.sym must not be null on JDK 11
• KT-39876 KAPT: Serialization of classpath structure is incorrect if there are dependencies between types in jar/dir