Python 2.6a3+ (trunk:64150M, Jun 11 2008, 14:08:14)
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.

% ./python Lib/test/test_multiprocessing.py
Fatal Python error: Invalid thread state for this thread
Traceback (most recent call last):
  File "Lib/test/test_multiprocessing.py", line 1791, in <module>
main()
  File "Lib/test/test_multiprocessing.py", line 1788, in main
test_main(unittest.TextTestRunner(verbosity=2).run)
  File "Lib/test/test_multiprocessing.py", line 1768, in test_main
ManagerMixin.pool = ManagerMixin.manager.Pool(4)
  File
"/home/greg/sandbox/python/trunk/Lib/multiprocessing/managers.py", line
647, in temp
token, exp = self._create(typeid, *args, **kwds)
  File
"/home/greg/sandbox/python/trunk/Lib/multiprocessing/managers.py", line
545, in _create
conn = self._Client(self._address, authkey=self._authkey)
  File
"/home/greg/sandbox/python/trunk/Lib/multiprocessing/connection.py",
line 139, in Client
answer_challenge(c, authkey)
  File
"/home/greg/sandbox/python/trunk/Lib/multiprocessing/connection.py",
line 380, in answer_challenge
message = connection.recv_bytes(256)         # reject large message
EOFError
[50971 refs]


This is on a single cpu i686 linux system.