1  /* { dg-do run } */
       2  
       3  extern void abort (void);
       4  
       5  union u
       6  {
       7    int i;
       8    _Bool b;
       9  };
      10  
      11  void f(union u * vp, union u v)
      12  {
      13    *vp = v;
      14  }
      15  
      16  int main()
      17  {
      18    union u v;
      19    union u v1;
      20    union u v2;
      21  
      22    v.i = 10;
      23    f(&v1, v);
      24  
      25    v.b = 0;
      26    f(&v2, v);
      27    if (v2.b != 0)
      28      abort ();
      29    return 0;
      30  }