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

Victor Stinner victor.stinner at gmail.com
Mon Jun 26 12:36:38 EDT 2017


I updated my bisect_test.py script to simplify its command line:


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?


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