gcc/testsuite/gcc.dg/pr69974.c

   1 /* PR c/69974 */
   2 /* { dg-do compile } */
   3
   4 struct S;
   5 char foo (struct S *);
   6 struct S a;     /* { dg-error "storage size of 'a' isn't known" } */
   7 int b;
   8
   9 void
  10 bar ()
  11 {
  12   b &= foo (&a);
  13 }