STINNER Victor added the comment:
> -1 is the position before the last element ('C'). After popping-off extra
> element the result can be ['A', 'B', None] or ['B', None, 'C'].
Oh ok :-) Now I'm confused, I don't know what is the expected behaviour :-)
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue26194>
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