[jdk17] RFR: 8269594: assert(_handle_mark_nesting > 1) failed: memory leak: allocating handle outside HandleMark

[Zhengyu Gu]

I would like to fix this assertion in jdk17. It was caught in Shenandoah nightly test and hard to reproduce, but fix is simple and low risk.

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Commit messages:
 - v0

Changes: https://git.openjdk.java.net/jdk17/pull/173/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=173&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269594
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/173.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/173/head:pull/173

PR: https://git.openjdk.java.net/jdk17/pull/173