backporting tests [was: [Python-checkins] r66863 - python/trunk/Modules/posixmodule.c]

In http://mail.python.org/pipermail/python-dev/2008-October/082994.html
Martin v. Löwis wrote:

> So 2.6.0 will contain a lot of tests that have never been tested in
> a wide variety of systems. Some are incorrect, and get fixed in 2.6.1,
> and stay fixed afterwards. This is completely different from somebody
> introducing a new test in 2.6.4. It means that there are more failures
> in a maintenance release, not less as in the first case.

If 2.6.1 has some (possibly accidental, but exposed to the users)
behavior that is not a clear bug, it should be kept through 2.6.x.
You may well want to change it in 2.7, but not in 2.6.4.  Adding a
test to 2.6.2 ensures that the behavior will not silently disappear
because of an unrelated bugfix in 2.6.3.

-jJ
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