[issue30283] [2.7] Backport test_regrtest (partially) on Python 2.7

[STINNER Victor]

STINNER Victor added the comment:

test_regrtest failed on "x86 Windows XP VS9.0 2.7" buildbot, but passed on "x86 Windows XP 2.7" buildbot?

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[279/402/1] test_regrtest
test test_regrtest failed -- multiple errors occurred; run in verbose mode for details
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http://buildbot.python.org/all/builders/x86%20Windows%20XP%20VS9.0%202.7/builds/140/steps/test/logs/stdio

The test isn't rerun in verbose mode. Another bug?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30283>
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