JetBrains/kotlin v1.6.0-RC2

Kotlin 1.6.0-RC2

on GitHub

Learn how to install Kotlin 1.6.0-RC2 plugin and how to configure build with 1.6.0-RC2

Changelog

Compiler

New Features

• KT-43919 Support loading Java annotations on base classes and implementing interfaces' type arguments

Performance Improvements

• KT-45185 FIR2IR: get rid of IrBuiltIns usages

Fixes

• KT-49477 Has ran into recursion problem with two interdependant delegates
• KT-49371 JVM / IR: "NoSuchMethodError" with multiple inheritance
• KT-49294 Turning FlowCollector into 'fun interface' leads to AbstractMethodError
• KT-18282 Companion object referencing it's own method during construction compiles successfully but fails at runtime with VerifyError
• KT-25289 Prohibit access to class members in the super constructor call of its companion and nested object
• KT-32753 Prohibit @JvmField on property in primary constructor that overrides interface property
• KT-43433 Suspend conversion is disabled message in cases where it is not supported and quickfix to update language version is suggested
• KT-49209 Default upper bound for type variables should be non-null
• KT-22562 Deprecate calls to "suspend" named functions with single dangling lambda argument
• KT-49335 NPE in RepeatedAnnotationLowering.wrapAnnotationEntriesInContainer when using @Repeatable annotation from different file
• KT-49322 Postpone promoting warnings to errors for ProperTypeInferenceConstraintsProcessing feature
• KT-49285 Exception on nested builder inference calls
• KT-49101 IllegalArgumentException: ClassicTypeSystemContext couldn't handle: Captured(out Number)
• KT-36399 Gradually support TYPE_USE nullability annotations read from class-files
• KT-11454 Load annotations on TYPE_USE/TYPE_PARAMETER positions from Java class-files
• KT-18768 @Notnull annotation from Java does not work with varargs
• KT-24392 Nullability of Java arrays is read incorrectly if @Nullable annotation has both targets TYPE_USE and VALUE_PARAMETER
• KT-48157 FIR: incorrect resolve with built-in names in use
• KT-46409 FIR: erroneous resolve to qualifier instead of extension
• KT-44566 FirConflictsChecker do not check for conflicting overloads across multiple files
• KT-37318 FIR: Discuss treating flexible bounded constraints in inference
• KT-45989 FIR: wrong callable reference type inferred
• KT-46058 [FIR] Remove state from some checkers
• KT-45973 FIR: wrong projection type inferred
• KT-43083 [FIR] False positive 'HIDDEN' on internal
• KT-46727 Report warning on contravariant usages of star projected argument from Java
• KT-40668 FIR: Ambiguity on qualifier when having multiple different same-named objects in near scopes
• KT-37081 [FIR] errors NO_ELSE_IN_WHEN and INCOMPATIBLE_TYPES absence
• KT-48162 NON_VARARG_SPREAD isn't reported on *toTypedArray() call
• KT-45118 ClassCastException caused by parent and child class in if-else
• KT-47605 Kotlin/Native: switch to LLD linker for MinGW targets
• KT-44436 Support default not null annotations to enhance T into T!!
• KT-49190 Increase stub versions

Docs & Examples

• KT-48534 Wrong compiler argument for RequiresOptIn

IDE. Debugger

• KT-47970 AE: "Either library or explicit name have to be provided " in IR debugger tests

JavaScript

• KT-43783 KJS / IR: companion object and nested objects are not exported
• KT-47524 KJS / IR: Treat protected members as part of exported API

Libraries

• KT-46229 Bring back Duration factory extension properties

Native

• KT-49384 Kotlin/Native: Unexpected variance in super type argument: out @0
• KT-49234 SIGSEGV using the new memory manager in release in Kotlin 1.6.0-RC in MacosX64

Tools. Gradle

• KT-49189 In Gradle, dependencies on an MPP with Android+JVM fail to resolve in pure-Java projects
• KT-48830 Change deprecation level to 'ERROR' for 'KotlinGradleSubplugin'
• KT-48264 Cannot write Kotlin build report unless directory exists
• KT-45504 Deprecate Gradle option KotlinJvmOptions.useIR since 1.5

Tools. Gradle. JS

• KT-49124 KJS / Gradle: Unable to load '@webpack-cli/serve' command
• KT-49201 KJS / Gradle: NPM dependencies resolution may fail on parallel builds

Tools. Gradle. Multiplatform

• KT-48709 MPP: Task compileKotlinMacosX64 fails on matching native variants if ktlint presented

Tools. REPL

• KT-47783 REPL: Keywords completion appears after numeric and string literals

Tools. Scripts

• KT-49400 Script resolver options can't take values with special symbols (/, , $, :, .) in them

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