[jdk18u] RFR: 8286870: Memory leak with RepeatCompilation

[Tobias Hartmann]

Backport of [JDK-8286870](https://bugs.openjdk.java.net/browse/JDK-8286870). Applies cleanly. Approval is pending.

Thanks,
Tobias

-------------

Commit messages:
 - 8286870: Memory leak with RepeatCompilation

Changes: https://git.openjdk.org/jdk18u/pull/160/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk18u&pr=160&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8286870
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk18u/pull/160.diff
  Fetch: git fetch https://git.openjdk.org/jdk18u pull/160/head:pull/160

PR: https://git.openjdk.org/jdk18u/pull/160