[issue29562] test_getgroups of test_posix fails (on OS X 10.10)

[Jim DeLaHunt]

Jim DeLaHunt added the comment:

> Note that the result of getgroups(2) is fixed on login, while "id -G" reflects the current state of the user database on macOS.

Wow, that's interesting!  Thank you for this information.

The test code for test_getgroups does not mention this interaction.  I can certainly see how it could affect the test. Maybe it should be added?

Since I last tried that test, I've logged out and restarted several times, and changed OS to Mac OS X 10.11 El Capitan. Nothing like changing several independent variables at once while diagnosing! I will try the test again and report back.

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<http://bugs.python.org/issue29562>
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