Stefan Krah <stefan-use...@bytereef.org> added the comment:

Fedora 12: copysign-bug varies wildly ((GCC) 4.4.3 20100127 (Red Hat 4.4.3-4)):

[ste...@fedora-amd64 trunk]$ gcc  -O0 copysign_bug.c -o copysign_bug
[ste...@fedora-amd64 trunk]$ ./copysign_bug 
copysign_bug(-0) = 2
copysign_bug(0) = 3

[ste...@fedora-amd64 trunk]$ gcc  -O2 copysign_bug.c -o copysign_bug
[ste...@fedora-amd64 trunk]$ ./copysign_bug 
copysign_bug(-0) = 3
copysign_bug(0) = 3

[ste...@fedora-amd64 trunk]$ gcc  -O3 copysign_bug.c -o copysign_bug
[ste...@fedora-amd64 trunk]$ ./copysign_bug 
copysign_bug(-0) = 2
copysign_bug(0) = 3

[ste...@fedora-amd64 trunk]$ gcc  -O3 -fno-inline copysign_bug.c -o copysign_bug
[ste...@fedora-amd64 trunk]$ ./copysign_bug 
copysign_bug(-0) = 3
copysign_bug(0) = 3

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue9069>
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