Using nose.collector with setuptools breaks multiprocessing

[patrys]

I use Python 2.7 and can trigger the problem with the following setup script in an empty directory:

#!/usr/bin/env python
from setuptools import setup

setup(
    name='whatever',
    version='dev',
    packages=[],
    tests_require=[
        'nose==1.2.1'],
    test_suite='nose.collector')

The test runner then raises an error at exit time:

$ python setup.py test
running test
running egg_info
writing whatever.egg-info/PKG-INFO
writing top-level names to whatever.egg-info/top_level.txt
writing dependency_links to whatever.egg-info/dependency_links.txt
reading manifest file 'whatever.egg-info/SOURCES.txt'
writing manifest file 'whatever.egg-info/SOURCES.txt'
running build_ext

----------------------------------------------------------------------
Ran 0 tests in 0.000s

OK
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/lib64/python2.7/multiprocessing/util.py", line 284, in _exit_function
    info('process shutting down')
TypeError: 'NoneType' object is not callable
Error in sys.exitfunc:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/lib64/python2.7/multiprocessing/util.py", line 284, in _exit_function
    info('process shutting down')
TypeError: 'NoneType' object is not callable

[frewsxcv]

I'm running into this issue too with Python 2.6 + nose 1.3.0. A quick fix is to insert import multiprocessing in your setup.py, but this really should be fixed.

[frewsxcv]

Actually, it looks like this is a CPython issue. It's already been fixed in the 2.7.4, but didn't apparently make it in the 2.6 release set. @patrys, can you reproduce this issue with 2.7.4 or 2.7.5? If not, we should close this issue

[patrys]

I can confirm that it works with 2.7.5.