int f (char *p) { }main (){  char c;  char c2;  int i = 0;  char *pc = &c;  char *pc2 = &c2;  int *pi = &i;  *pc2 = 1;  *pi = 1;  *pc2 &= *pi;  f (pc2);  *pc2 = 1;  *pc2 &= *pi;  if (*pc2 != 1)    abort ();  exit (0);}