gcc/testsuite/gcc.dg/pr101172.c

   1 /* PR middle-end/101172 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2" } */
   4
   5 union U
   6 {
   7   int a[3];
   8   struct
   9   {
  10     int a : 3;
  11     struct this_struct var;     /* { dg-error "field 'var' has incomplete type" } */
  12   } b;
  13 };
  14
  15 const union U hello = {.a = {1, 2, 3}};
  16
  17 void foo()
  18 {
  19   int x = hello.b.a;
  20 }