commit 52849bfaa384f1dcc26a8aa9092379921d835081
author Antoine Pitrou <solipsis@pitrou.net> Thu Apr 19 23:55:01 2012 +0200
committer Antoine Pitrou <solipsis@pitrou.net> Thu Apr 19 23:55:01 2012 +0200
tree cf97e23e85810217b86808d64b5188288129fd6e
parent c45868ec697a70a80d1cf8a511894f073fda3a27

Issue #14308: Fix an exception when a "dummy" thread is in the threading module's active list after a fork().

Lib/threading.py

diff --git a/Lib/threading.py b/Lib/threading.py
index ff32dfb..2290855 100644
--- a/Lib/threading.py
+++ b/Lib/threading.py
@@ -605,6 +605,10 @@
                     pass
 
     def __stop(self):
+        # DummyThreads delete self.__block, but they have no waiters to
+        # notify anyway (join() is forbidden on them).
+        if not hasattr(self, '_Thread__block'):
+            return
         self.__block.acquire()
         self.__stopped = True
         self.__block.notify_all()