tree 902be9ebc236113e2b3d99744068f35eb864dbf0
parent c7a0a455063472a3989eb31494bd1ba3f641c1e0
author Wez <wez@fuchsia.infra.roller.google.com> 1773249366 -0700
committer Copybara-Service <copybara-worker@google.com> 1773249441 -0700

[roll] Roll fuchsia [starnix] Clear the ThreadGroupMutableState::parent on exit

When `ThreadGroupMutableState::remove()` is called for the final
`Task` in the group, clear the `parent` reference so that requests
via lingering references to this thread group continue to observe
consistent state.

This addresses references to an exited ThreadGroup out-living the
parent ThreadGroup, leaving the ThreadGroupParent invalid.

Original-Bug: 456872776
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1534915
Original-Revision: 7e9f333ecc1f8dbb1e8a251a9a5c5562086324de
GitOrigin-RevId: d5d70e9a0d4c9a2cf4e8f87f9ffe0bc84a50c02f
Change-Id: I626755a63e4d1f71c41c57af368c765ac81bb7b4