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Issue #7264: Fix a possible deadlock when deallocating thread-local objects

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which are part of a reference cycle.
This commit is contained in:
Antoine Pitrou 2009-11-05 13:42:29 +00:00
parent 2537e7a443
commit 99c160b559
3 changed files with 12 additions and 3 deletions
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8
Lib/_threading_local.py
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@ -218,10 +218,12 @@ class local(_localbase):
key = object.__getattribute__(self, '_local__key')
try:
threads = list(threading.enumerate())
# We use the non-locking API since we might already hold the lock
# (__del__ can be called at any point by the cyclic GC).
threads = threading._enumerate()
except:
# If enumerate fails, as it seems to do during
# shutdown, we'll skip cleanup under the assumption
# If enumerating the current threads fails, as it seems to do
# during shutdown, we'll skip cleanup under the assumption
# that there is nothing to clean up.
return