[jdk21u-dev] RFR: 8322996: BoxLockNode creation fails with assert(reg < CHUNK_SIZE) failed: sanity

[Martin Doerr]

Backport of [JDK-8322996](https://bugs.openjdk.org/browse/JDK-8322996). Applies cleanly except `+  if (failing()) { return; }` in parse2.cpp which required manual integration due to unrelated context changes.

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Commit messages:
 - Backport 69586e7bdffe1a840c3a86e6ec83568de24c6fe5

Changes: https://git.openjdk.org/jdk21u-dev/pull/698/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=698&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8322996
  Stats: 266 lines in 6 files changed: 252 ins; 1 del; 13 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/698.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/698/head:pull/698

PR: https://git.openjdk.org/jdk21u-dev/pull/698