diff options
Diffstat (limited to 'Lib/threading.py')
| -rw-r--r-- | Lib/threading.py | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/Lib/threading.py b/Lib/threading.py index 7dae77d..7b3d63d 100644 --- a/Lib/threading.py +++ b/Lib/threading.py @@ -844,8 +844,12 @@ class Thread: # they may be in an invalid state leading to a deadlock or crash. self._started._at_fork_reinit() if is_alive: - self._tstate_lock._at_fork_reinit() - self._tstate_lock.acquire() + # bpo-42350: If the fork happens when the thread is already stopped + # (ex: after threading._shutdown() has been called), _tstate_lock + # is None. Do nothing in this case. + if self._tstate_lock is not None: + self._tstate_lock._at_fork_reinit() + self._tstate_lock.acquire() else: # The thread isn't alive after fork: it doesn't have a tstate # anymore. |