v1.8.20-RC

Kotlin 1.8.20-RC delivers critical stability fixes across compiler backends, Gradle tooling, and multiplatform builds. Key improvements include resolving K2 compiler metadata issues, fixing iOS native linking failures, stabilizing Kotlin/JS incremental caching, and addressing Gradle task configuration duplication. This release prioritizes reliability for production mobile and cross-platform development workflows.

Highlights

• Fixed critical compiler issues affecting inline functions, suspend functions, and native linking on iOS
• Resolved K2 compiler bugs including metadata reading errors and incorrect line number indexing
• Improved Kotlin/JS incremental builds with cache stability and source map fixes
• Fixed Gradle integration issues with KaptGenerateStubs task argument duplication
• Enhanced serialization support with polymorphic deserializer and enum binary compatibility fixes
• Resolved multiplatform build issues including native distribution commonization and file lock conflicts