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

Jack Diederich jackdied at jackdied.com
Fri Sep 22 07:43:16 CEST 2006

On Thu, Sep 21, 2006 at 10:23:54PM -0700, Neal Norwitz wrote:

On 9/21/06, Jack Diederich <jackdied at jackdied.com> wrote: > > I should leave the tounge-in-cheek bombast to Tim and Frederik, especially > when dealing with what might be an OS & machine specific bug. The next > checkin and re-test will or won't highlight a failure and certainly someone > with a g4 will try it out before 2.5.1 goes out so we'll know if it was a > fluke soonish. The original error was mine, I typed "Sizet" instead of > "Ssizet" and while my one-char patch might also be wrong (I hope not, I'm > red-faced enough as is) we should find out soon enough.

It looks like %zd of a negative number is treated as an unsigned number on OS X, even though the man page says it should be signed. """ The z modifier, when applied to a d or i conversion, indicates that the argument is of a signed type equivalent in size to a sizet. """ The program below returns -123 on Linux and 4294967173 on OS X. n -- #include <stdio.h> int main() { char buffer[256]; if(sprintf(buffer, "%zd", (sizet)-123) < 0) return 1; printf("%s\n", buffer); return 0; }

Consider me blushing even harder for denying the power of the buildbot (and against all evidence). Yikes, didn't any other tests trigger this?

sprat:~/src/python-head# find ./ -name '*.c' | xargs grep '%zd' | wc -l 65

-Jack

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