1 // { dg-do compile }
2 
3 // Copyright (C) 2004 Free Software Foundation, Inc.
4 // Contributed by Nathan Sidwell 14 Dec 2004 <nathan@codesourcery.com>
5 
6 // PR 18981. ICE
7 // Origin:  Andreas Schwab <schwab@suse.de>
8 
9 template <class T>
10 struct tree {
11   struct iterator;
12   struct sibling_iterator {
13     friend struct tree<T>::iterator;
14   };
15 };
16