New issue 749: multiprocessing broken since 2.7.1 on Windows
https://bitbucket.org/pytest-dev/pytest/issue/749/multiprocessing-broken-since-271-on
Marc Schlaich:
With pytest 2.7.1, Processes with multiprocessing don't start anymore, I'm
seeing this in stdout:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "c:\python27\Lib\multiprocessing\forking.py", line 380, in main
prepare(preparation_data)
File "c:\python27\Lib\multiprocessing\forking.py", line 488, in prepare
assert main_name not in sys.modules, main_name
AssertionError: __main__
This is probably due to this upstream issue with wheels:
https://github.com/pypa/pip/issues/1891
Installing pytest not as wheel with `pip install --no-use-wheel` resolves this
issue.
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