Mark Dickinson <dicki...@gmail.com> added the comment:
I managed to reproduce this with Ubuntu 10.10 and the gcc-snapshot package.
I've shrunk it to the following (no floating-point in sight!):
/* file dtoa.c */
static char s0[12];
char *_Py_dg_dtoa()
{
char *s = s0;
*s++ = '9';
*s++ = '9';
while(*--s == '9')
if (s == s0) {
*s = '0';
break;
}
++*s;
return s0;
}
int main(void) {
char *s;
s = _Py_dg_dtoa();
return s[0] != '1';
}
/* end file dtoa.c */
dicki...@ubuntu:~/bug$ /usr/lib/gcc-snapshot/bin/gcc -O0 dtoa.c && ./a.out &&
echo "Success" || echo "Failure"
Success
dicki...@ubuntu:~/bug$ /usr/lib/gcc-snapshot/bin/gcc -O1 dtoa.c && ./a.out &&
echo "Success" || echo "Failure"
Failure
----------
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue9215>
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