coverage==4.0 hangs indefinitely on python2.7 + windows · Issue #420 · nedbat/coveragepy (original) (raw)

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Description

Originally reported by Anthony Sottile (Bitbucket: asottile, GitHub: asottile)

The reproduction here is a bit complicated because I haven't quite narrowed it down yet but here goes.

I noticed this initially when my build was running indefinitely (and eventually failing) here : https://ci.appveyor.com/project/asottile/pre-commit/branch/master/job/r57jhonel6dlgd9d

My "minimal" reproduction is as follows:

1. git clone git://github.com/pre-commit/pre-commit
2. cd pre-commit
3. virtualenv venv
4. . venv/Scripts/activate
5. pip install -r requirements-dev.txt
6. pip install 'coverage<4'
7. coverage run -m pytest tests -k test_parse_merge # Runs and succeeds
8. pip install 'coverage>=4'
9. coverage run -m pytest tests -k test_parse_merge # Hangs forever

I've attached a screenshot (the contrast sucks because the window froze on my VM)

• Bitbucket: https://bitbucket.org/ned/coveragepy/issue/420
• This issue had attachments: Screen Shot 2015-10-02 at 6.32.03 PM.png. See the original issue for details.