1  /* { dg-do compile } */
       2  /* { dg-options "-O0 -fshow-column" } */
       3  
       4  struct { int; int q; } a; /* { dg-warning "13:does not declare anything" } */
       5  struct { union {int x;}; int q; } b;
       6  struct { struct {int x;}; int q; } c;
       7  union { union {int x;}; int q; } d;
       8  union { struct {int x;}; int q; } e;