gcc/testsuite/gcc.dg/union-cast-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-std=c89 -pedantic-errors" } */
   3 /* PR 23155
   4    We should get two error messages, one about union cast
   5    and the other about array access for non lvalues.  */
   6
   7
   8 union vx {short f[8]; int v;};
   9 int vec;
  10
  11 void
  12 foo5 (int vec)
  13 {
  14   ((union vx) vec).f[5] = 1; /* { dg-error "(forbids subscripting)|(forbids casts to union type)" } */
  15 }