[Python-Dev] test_itertools fails for trunk on x86 OS X machine (original) (raw)

Neal Norwitz nnorwitz at gmail.com
Fri Sep 22 08:37:37 CEST 2006

On 9/21/06, Tim Peters <tim.peters at gmail.com> wrote:

Well, to be strictly anal, while the result of (sizet)-123 is defined, the result of casting /that/ back to a signed type of the same width is not defined. Maybe your compiler was "doing you a favor" ;-)

I also tried with a cast to an ssize_t and replacing %zd with an %zi. None of them make a difference; all return an unsigned value. This is with powerpc-apple-darwin8-gcc-4.0.0 (GCC) 4.0.0 20041026 (Apple Computer, Inc. build 4061). Although i would expect the issue is in the std C library rather than the compiler.

Forcing PY_FORMAT_SIZE_T to be "l" instead of "z" fixes this problem.

BTW, this is the same issue on Mac OS X:

struct.pack('=b', -599999) main:1: DeprecationWarning: 'b' format requires 4294967168 <= number <= 127 'A'

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