This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Author gdb
Recipients bobbyi, gdb, jnoller
Date 2010-07-08.19:28:00
SpamBayes Score 0.0113791
Marked as misclassified No
Message-id <>
For what it's worth, I think I have a simpler reproducer of this issue.  Using freshly-compiled python-from-trunk (as well as multiprocessing-from-trunk), I get tracebacks from the following about 30% of the time:

import multiprocessing, time           
def foo(x):                            
multiprocessing.Pool(1).apply(foo, [1])

My tracebacks are of the form:
Exception in thread Thread-1 (most likely raised during interpreter shutdown):
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/", line 530, in __bootstrap_inner
  File "/usr/local/lib/python2.7/", line 483, in run
  File "/usr/local/lib/python2.7/multiprocessing/", line 272, in _handle_workers
<type 'exceptions.TypeError'>: 'NoneType' object is not callable
Date User Action Args
2010-07-08 19:28:02gdbsetrecipients: + gdb, jnoller, bobbyi
2010-07-08 19:28:02gdbsetmessageid: <>
2010-07-08 19:28:01gdblinkissue4106 messages
2010-07-08 19:28:00gdbcreate