pypa/virtualenv — pull request #259 by msabramo (2012-05-01 19:02:35+00:00)
Title: Hack to prevent stupid "TypeError: 'NoneType' object is not callable" error on exit of `python setup.py test`

Hack to prevent stupid `TypeError: 'NoneType' object is not callable` error on exit of `python setup.py test`
in `multiprocessing/util.py` `_exit_function` when running `python setup.py test` (see
http://www.eby-sarna.com/pipermail/peak/2010-May/003357.html)