[issue20932] Undefined behavior flagged by Clang 3.4 (Python 3.5 from hg)

[Martin Panter]

Martin Panter added the comment:

Serhiy’s patch does fix about half the errors (1 whole screenful reduces to a bit over 1/2 a screenful). I do find it a bit ugly though (four casts in the one term of a macro!).

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20932>
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