Kotlin 2.1.0-RC

Changelog

Backend. Wasm

• KT-72297 [Wasm] Unused associated object class lead to compiler fail

Compiler

• KT-72281 K/N: "Failed to wait for cache to be built"
• KT-72238 Argument type mismatch in builder inside extension function after ?:
• KT-71751 K2: Skipping code in last statement of lambda
• KT-72552 AutoboxingTransformer fails on during linkage on nested lambdas with cinteroped types
• KT-71649 K2: Put operator on mutableMap<T?, V>() causes crashes on null key
• KT-71508 JAVA_CLASS_INHERITS_KT_PRIVATE_CLASS isn't reported when java class is inherited from an effectively private class
• KT-72178 K2: "Unexpected FirPlaceholderProjectionImpl" exception when using "_" as key type in EnumMap
• KT-72302 K2: no error on type operator in annotation parameter default value
• KT-72173 K2: simple object names from root package are resolved without imports in non-root packages when used as values

Compose compiler

• b/376058538 Fix stack overflow when inferring stability of indirect generic loop
• b/339322843 Transform @Composable property delegate references

IR. Inlining

• KT-72521 Kotlin/Native: java.lang.AssertionError: kfun:androidx.compose.runtime#access$<get-androidx_compose_runtime_ProvidedValue$stable>$p$tComposerKt(){}kotlin.Int
• KT-72623 Don't generate synthetic accessors in files other than the one being lowered

IR. Interpreter

• KT-72356 K2 Native: IllegalStateException when annotation has the same source range as a constant in another file

Native. Runtime. Memory

• KT-71401 K/N: CMS barrier can be executed on an unregisterred thread

Tools. CLI

• KT-72311 KotlinCliJavaFileManagerImpl caches empty result and broke repeated analyses

Tools. Daemon

• KT-72530 The daemon has terminated unexpectedly on startup attempt #1 with error code: Unknown

Tools. Gradle

• KT-72467 kotlin.sourceSets extension not added for KotlinBaseApiPlugin.createKotlinAndroidExtension()
• KT-72495 Warn about kotlin-compiler-embeddable loaded along KGP
• KT-72387 KGP 2.1.0-RC-227 changes cause KSP to crash calling produceUnpackedKlib
• KT-72303 KGP 2.1.0-Beta2 broke compatibility with KSP
• KT-72651 Unable to use target for KotlinBaseApiPlugin.createKotlin(Jvm/Android)Extension()

Tools. Gradle. Multiplatform

• KT-72454 Revert changes made in KT-69899 i.e. make kotlin.android.buildTypeAttribute.keep = false by default again

Tools. Gradle. Native

• KT-72366 KGP 2.1.0-Beta2 doesn't download kotlin-native-prebuilt when running Dokka
• KT-71051 K/N dependencies are re-downloaded multiple times on Windows

Tools. JPS

• KT-68565 K2: IllegalStateException: Source classes should be created separately before referencing

Tools. Kapt

• KT-71776 K2 Kapt in 2.1.0-Beta1 fails with e: java.lang.IllegalStateException: FIR symbol "class org.jetbrains.kotlin.fir.symbols.impl.FirValueParameterSymbol" is not supported in constant evaluation