[vm/tsan] Fix reported tsan race in message handler test

Closes https://github.com/dart-lang/sdk/issues/42097

Change-Id: I3fb89e18936b3ec95def268cd270ada889e0e9b5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149322
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>

https://dart.googlesource.com/sdk/+/4c83df8741ff3e53ab44147246481e17ad898f0a
1 file changed
tree: 70b1b25d6ffa9fea5c1aec946bab8fe2b824cc54
  1. commits.json