RFR: 8376405: Virtual thread crash: assert(!_current->is_suspended()) failed: must be

Wed Jan 28 22:13:24 UTC 2026

Please review this small fix. In 8375362 we skipped the suspend check in `MountUnmountDisabler::start_transition` for transition disablers to avoid deadlocks, but that means we also need to update the assert in `~UnmountBeginMark()`. I was able to reproduce the crash locally using ThreadStateTest2.java and confirmed it is now fixed.

Thanks,
Patricio

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Commit messages:
 - v1

Changes: https://git.openjdk.org/jdk/pull/29473/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29473&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8376405
  Stats: 5 lines in 1 file changed: 3 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/29473.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29473/head:pull/29473

PR: https://git.openjdk.org/jdk/pull/29473