sizeof a struc field

[mcdonald at uxe.cso.uiuc.edu]

>However, the argument is persuasive only because the constant 0 has a
>special meaning in C.  We know a null pointer does not point to an
>object.  But what happens if we do the following?

>        sizeof ((type *)1)->member
            

How about
/* suitable definition of type and member here */
void *a;

size_t b = sizeof(((type *)a)->member);

type *c;
a = malloc(b);  
c = (type * )a;
Somehow this begins to look awfully legal to me. What if the malloc
was in another source file that was not linked in?

Doug McDonald