diff options
Diffstat (limited to 'Lib/threading.py')
| -rw-r--r-- | Lib/threading.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Lib/threading.py b/Lib/threading.py index cae2f77c8e..4ba7252f12 100644 --- a/Lib/threading.py +++ b/Lib/threading.py @@ -445,6 +445,26 @@ class Thread(_Verbose): self.__target(*self.__args, **self.__kwargs) def __bootstrap(self): + # Wrapper around the real bootstrap code that ignores + # exceptions during interpreter cleanup. Those typically + # happen when a daemon thread wakes up at an unfortunate + # moment, finds the world around it destroyed, and raises some + # random exception *** while trying to report the exception in + # __bootstrap_inner() below ***. Those random exceptions + # don't help anybody, and they confuse users, so we suppress + # them. We suppress them only when it appears that the world + # indeed has already been destroyed, so that exceptions in + # __bootstrap_inner() during normal business hours are properly + # reported. Also, we only suppress them for daemonic threads; + # if a non-daemonic encounters this, something else is wrong. + try: + self.__bootstrap_inner() + except: + if self.__daemonic and _sys is None: + return + raise + + def __bootstrap_inner(self): try: self.__started = True _active_limbo_lock.acquire() |