Kotlin v2.5.0-RC released!

NewsBot · 11 November 2026 13:25

Kotlin v2.5.0-RC has been released.

Changelog

Analysis API. Standalone

KT-89902 Analysis API Standalone: JavaPsiFacade doesn’t find Kotlin classes from binary libraries

Backend. Wasm

KT-91167 K/Wasm: suspend lambda containing a suspend call triggers unrelated file-property initialization

Compiler

KT-90315 Value classes resolved first as a supertype are treated as identity classes

KT-84904 Alpha release of Multi-Field Value Classes

KT-90707 Parser: “Expecting ‘;’ after the last enum entry” when an enum entry named error has arguments or a body

KT-91112 Type inference: reified Enum inferred as Nothing for a function-reference extension call since Kotlin 2.5

KT-90589 K/N: Debug static framework with a Kotlin subclass of NSObject does not link without -dead_strip: undefined “_kfun:platform.darwin.NSObject#objc:*-impl”

KT-90321 K2 IDE: “Multiple plugins generated nested class with same name Companion” floods the IDE log for a class with @Slf4j (Lombok) and @Serializable

KT-89985 InnerClasses entries lack ACC_IDENTITY with -Xjvm-enable-preview on JVM target 28

IR. Inlining

KT-72464 [Native][JS][Wasm] Non-local return through suspend conversion breaks the IR inliner

JVM. Reflection

KT-91317 Reflection: IAE “fromIndex(1) > toIndex(0)” on KClass.members of stdlib inline classes

KT-90525 Reflection: "MutableCollectionK…

Link: Release Kotlin 2.5.0-RC · JetBrains/kotlin · GitHub