Bug report (bis)

[Olivier Baudron]

A shorter program showing the bug is:

essai2.c:

/* ----------------------- CUT HERE -------------------------- */
#include <stdio.h>

void in_cksum(short *w) {
    short answer = 0;

    *(char *)(&answer) = *(char *)w ;
    printf ("answer=%hu\n", answer);
}

int main (int argc, char **argv) {
    short a[1]={0};

    in_cksum (a);
    return 0;
}
/* ----------------------- CUT HERE -------------------------- */


and the result:

% gcc -Wall -o essai2 essai2.c && essai2
answer=0
% gcc -O2 -Wall -o essai2 essai2.c && essai2
answer=63488