v2.1.20-Beta2

Kotlin 2.1.20-Beta2 delivers substantial performance improvements across the FIR analysis pipeline, enhanced support for context receivers in multiplatform projects, and expanded type alias capabilities in the K2 compiler. Key additions include moving Instant and Clock to stdlib, improved Compose compiler handling of context parameters, and better WebAssembly debugging support. The release also includes numerous bug fixes for inline functions, value classes, and debugger integration across JVM, JavaScript, and Native platforms.

Highlights

• Context receivers now support overloads in Kotlin multiplatform projects
• Significant performance improvements in FIR analysis with optimized caching and snapshot creation
• Type alias constructors now fully supported in Analysis API and K2 compiler
• Instant and Clock classes moved from kotlinx-datetime to stdlib
• Compose compiler improvements for context parameters and default values in open functions
• Multiple K2 compiler fixes for type aliases, value classes, and inline functions
• WebAssembly debug information support in DWARF format