Rémi Cardona wrote: > Andrew Haley a écrit : >> Are you using optimization? > > No, I'm building with those CFLAGS : -g -ggdb -Wall -save-temps > -fno-strict-aliasing > >> I think can see at least one bug in this function. >> >> ((CARD32 *)data)[i] = ((long *)retval)[i]; > > You're absolutely right, CARD32 is defined as an "unsigned long" on x86 > but as an "unsigned int" on x86_64. Changing this does not however > change anything in how the Xlib call done just before behaves. > >> Try compiling with -fno-strict-aliasing. > > Doesn't change anything. No additional warnings nor any change in behavior. Then this is probably a bug in gcc. I'd debug it a bit more then start working on a cut-down test case. Andrew.
