1 files changed, 52 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc b/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
new file mode 100644
index 000000000..a28a8d62f
--- /dev/null
+++ b/libstdc++-v3/testsuite/23_containers/map/operations/31440.cc
@@ -0,0 +1,52 @@
+// { dg-do compile }
+
+// Copyright (C) 2007, 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/>.
+//
+
+#include <map>
+
+// libstdc++/31440
+struct DagNode
+{ };
+
+class MemoTable
+{
+public:
+  void memoRewrite();
+
+private:
+  struct dagNodeLt;
+  class MemoMap;
+
+  MemoMap* memoMap;
+};
+
+struct MemoTable::dagNodeLt
+{
+  bool operator()(const DagNode*, const DagNode*);
+};
+
+class MemoTable::MemoMap
+: public std::map<DagNode*, DagNode*, MemoTable::dagNodeLt>
+{ };
+
+void
+MemoTable::memoRewrite()
+{
+  memoMap->find(0);
+}