[issue12701] Apple's clang 2.1 (xcode 4.1, OSX 10.7) optimizer miscompiles intobject.c

[Ronald Oussoren]

Ronald Oussoren <ronaldoussoren at mac.com> added the comment:

Clang has an option "-fcatch-undefined-behavior" that might help in locating other locations where we use undefined behavior.

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<http://bugs.python.org/issue12701>
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