v2.0.21-RC

Kotlin 2.0.21-RC focuses on Apple ecosystem compatibility with full Xcode 16 support and platform library updates. This release addresses critical K2 compiler stability issues including NPE regressions, IR processing errors, and native build infrastructure problems on macOS. Gradle multiplatform tooling improvements resolve Android target consumption issues and memory exhaustion during builds.

Highlights

• Xcode 16 support with platform library rebuilds and native compilation fixes
• K2 compiler stability improvements fixing NPE, IllegalStateException, and IR crashes
• Compose compiler fixes for restartable functions and live literal transforms
• Kotlin Native build infrastructure fixes for macOS x86_64 and C++ modules
• Gradle multiplatform improvements for Android targets and memory optimization
• Debugger enhancements fixing step-out functionality in Xcode 16