1  struct A
       2  {
       3    void* q;
       4    short i;
       5  };
       6  
       7  union U
       8  {
       9    char* p;
      10    struct A a;
      11  };
      12  
      13  struct A foo(union U u)
      14  {
      15    struct A a = { 0, 0 };
      16    a = u.a;
      17    return a;
      18  }