[issue26372] Popen.communicate not ignoring BrokenPipeError

[STINNER Victor]

STINNER Victor added the comment:

> This isn't consistent with the behavior of communicate with a timeout

Right, it looks like BrokenPipeError on writing into stdin is ignored in some cases, but not in all cases.

Attached patch for Python 3.6 adds two try/except BrokenPipeError with two unit tests.

It looks like Python 2.7 has a similar bug: stdin.close() is not surrounded by try/except BrokenPipeError.

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nosy: +haypo

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<http://bugs.python.org/issue26372>
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