[issue1726687] Bug found in datetime for Epoch time = -1

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

The patch is correct. I tried to use errno, but errno is unchanged on 
error. Here is a new patch with regression tests.

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nosy: +haypo
versions: +Python 2.7, Python 3.1
Added file: http://bugs.python.org/file11982/mktime_fix_and_tests.patch

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