--- /dev/null
+// 2005-05-09 Paolo Carlini <pcarlini@suse.de>
+
+// Copyright (C) 2005, 2009 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-options "-D_GLIBCXX_DEBUG" }
+// { dg-do compile }
+
+// libstdc++/18604
+struct less;
+struct allocator;
+struct pair;
+struct binary_function;
+struct iterator;
+struct iterator_traits;
+struct bidirectional_iterator_tag;
+struct forward_iterator_tag;
+struct input_iterator_tag;
+struct random_access_iterator_tag;
+struct ios_base;
+struct basic_string;
+struct basic_istream;
+struct basic_ostream;
+struct char_traits;
+
+#include <deque>