Kotlin v2.5.0-Beta1 released!

NewsBot · 23 September 2026 12:24

Kotlin v2.5.0-Beta1 has been released.

Changelog

Analysis API

KT-88945 Analysis API: annotation resolution drops a class id when a source annotation shadows a library one

KT-87460 Flaky (Embeddable)SwiftExport tests

KT-68896 Support VirtualFile binary dependency inputs to Analysis API modules

KT-65417 K2 IDE: KTOR false positive expect-actual matching error on enum class because of implicit clone() in non-JVM source sets

Analysis API. FIR

KT-88962 False negative [AMBIGUOUS_ANNOTATION_ARGUMENT] diagnostic in some corner cases

KT-87651 [Analysis API] Unexpected FIR status exception on SAM interfaces

KT-87572 Symbols from companion blocks have dispatchReceiver in stub-based version

KT-69727 K2 IDE. Wrong error in the editor on calling clone function of actual enum instance in non-jvm platform

KT-69726 FP errors on declaring fun clone() in actual enum in not-jvm source-set

KT-72660 ISE: Recursive update at org.jetbrains.kotlin.analysis.low.level.api.fir.caches.FirCaffeineCache.getValue

KT-62892 K2 IDE. Java outer class from other module is not resolved when nested class is accessed with fq name in a type position

Analysis API. Infrastructure

KT-84914 Do not publish analysis-api-test-framework

KT-87672 Eliminate class duplication in the Analysis API JARs

[KT-87998](https://youtra…

Link: Release Kotlin 2.5.0-Beta1 · JetBrains/kotlin · GitHub