- Introduced several compiler features: in‑place arguments inlining for @InlineOnly, runtime‑retention repeatable annotations, annotation support on type parameters, conversion from regular to suspending functional types, and synthetic pro...
- Added breaking changes such as prohibiting old JVM backend with language version 1.6, stricter rules for repeatable annotation containers, builder‑inference lambda restrictions, and disallowing protected constructor calls from public inl...
- Fixed numerous bugs and performance regressions across JVM/IR, FIR, Kotlin/Native, and tooling (e.g., nullability assertion removal, IR lowering crashes, NPEs in delegated properties, and incorrect type inference), plus deprecations for ...