Compilation Replay has been improved to make it more stable and catch up with new JVM features. Enhancements include:
- Best-effort support for hidden classes, allowing more cases involving invokedynamic, MethodHandles, and lambdas to replay successfully
- DumpReplay support for C1
- Incremental inlining support
- Numerous bug fixes to improve stability

Compilation Replay is a JVM feature of debug builds that is mainly used to reproduce crashes in the C1 or C2 JIT compilers.