Merged revisions 78519 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

................
  r78519 | gregory.p.smith | 2010-02-28 10:57:46 -0800 (Sun, 28 Feb 2010) | 10 lines

  Merged revisions 78517 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

  ........
    r78517 | gregory.p.smith | 2010-02-28 10:36:09 -0800 (Sun, 28 Feb 2010) | 3 lines

    Issue #7481: When a threading.Thread failed to start it would leave the
    instance stuck in initial state and present in threading.enumerate().
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diff --git a/Lib/threading.py b/Lib/threading.py
index 4bb0182..c996f42 100644
--- a/Lib/threading.py
+++ b/Lib/threading.py
@@ -455,7 +455,12 @@
             self._note("%s.start(): starting thread", self)
         with _active_limbo_lock:
             _limbo[self] = self
-        _start_new_thread(self._bootstrap, ())
+        try:
+            _start_new_thread(self._bootstrap, ())
+        except Exception:
+            with _active_limbo_lock:
+                del _limbo[self]
+            raise
         self._started.wait()
 
     def run(self):