Kotlin 2.0.20-RC2

Changelog

Backend. Wasm

• KT-70591 To much sources that don't exist inside SourceMap file

Compiler

• KT-70186 Kotlin 2.0.20-Beta2: Unexpected number of type arguments: 0
• KT-69835 K2 / Native: kotlin.native.binary.gc=cms throws library cached but its dependency isn't error
• KT-70417 DELEGATED_MEMBER_HIDES_SUPERTYPE_OVERRIDE leads to NPE in BE
• KT-69964 K2: Returning from an in-place lambda doesn't compile
• KT-69995 K2: Slow compilation when star projecting mutually recursive bounds from java
• KT-69773 K2: "Overload resolution ambiguity between candidate" with arrays
• KT-70238 K2: false negative VOLATILE_ON_VALUE for constructor properties
• KT-69766 K2: False negative: Internal setter of generic class is accessible from another module
• KT-69898 K2: Performance degradation in fir2ir caused by changes around intersection types

Compose compiler

• b/357878245 Disallow open @Composable functions with default params to fix binary compatibility issues.

JavaScript

• KT-70592 "Error: HttpClientCall expected" on HTTP request when targeting es2015 with KTOR
• KT-67355 KJS / ES6: 'super' in lambda with enabled -Xir-generate-inline-anonymous-functions leads to JS errors

Libraries

• KT-70196 Introduce ExperimentalUuidApi annotation for marking Uuid API

Native

• KT-70166 Native: EXC_BAD_ACCESS on watchOS when using Dispatchers
• KT-69246 K2: linkPodDebugFrameworkIosArm64 takes 15 (!!) times longer

Native. Runtime

• KT-70043 Native: EXC_BAD_ACCESS on watchOS when using Random

Tools. Compiler plugins. Serialization

• KT-70516 KxSerialization: @KeepGeneratedSerializer and sealed class cause initialization error

Tools. Gradle. JS

• KT-70077 [2.0.20-Beta2] KGP reports confusing warnings about js/wasmJS source sets

Tools. Wasm

• KT-70220 K/Wasm: Upgrade NPM dependencies