Christian Heimes <li...@cheimes.de> added the comment:

The patch has another flaw. The compiler may choose to fold and optimize code 
in _tscmp(). I'm going to declare the length of the right side and both char* 
as volatile. That should stop any compiler.

I could also add some pragmas:

MSVC:
#pragma optimize("", off)
code
#pragma optimize("", on)

GCC 4.4+:
#pragma GCC push_options
#pragma GCC optimize ("O0")
code
#pragma GCC pop_options

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue15061>
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