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Mon Jun 26 15:58:48 EDT 2017 · https://mail.python.org/pipermail/python-dev/2017-June/148491.html

On Mon, 26 Jun 2017 at 09:38 Victor Stinner <victor.stinner at gmail.com>
wrote:

> Hi,
>
> I updated my bisect_test.py script to simplify its command line:
>
>    https://github.com/haypo/misc/blob/master/python/bisect_test.py
>
> To debug a reference leak in test_os, now just type:
>
>    $ ./python bisect_test.py -R 3:3 test_os
>
> Example of output:
> ---
> (...)
> Failing tests (1):
> * test.test_os.ExecTests.test_execve_invalid_env
>
> Bisection completed in 24 iterations and 0:02:11
> ---
>
> In 2 minutes, you get the guilty: test_execve_invalid_env()! It's now
> fully automated!
>
>
> I also added --fail-env-changed option to regrtest. Using this option,
> you can find which test leaked a file, and modified any other resource
> tracked by regrtest. For examle, I used this command to find which
> test method of test_subprocess created a core dump file:
>
>    $ ./python bisect_test.py --fail-env-changed test_subprocess
>
>
> Later, I will try to integrate this tiny tool in Python. Maybe
> somewhere in Tools/. Or better, maybe directly in regrtest?
>

I don't see why regrtest isn't the right place for this.
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Showing content from https://mail.python.org/pipermail/python-dev/2017-June/148491.html below:

[Python-Dev] New work-in-progress bisection tool for the Python test suite (in regrtest)