--- /dev/null
+// { dg-do compile }
+
+// 2007-03-03 Paolo Carlini <pcarlini@suse.de>
+//
+// 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 <sstream>
+
+class MyClass
+{
+ double x;
+
+public:
+ MyClass(double X) : x(X) {}
+ friend bool operator&&(int i, const MyClass& Z);
+};
+
+inline bool
+operator&&(int i, const MyClass& Z)
+{ return int(Z.x) == i; }
+
+// libstdc++/31031
+void test01()
+{
+ int k =3;
+ MyClass X(3.1);
+ std::wostringstream oss;
+
+ oss << (k && X);
+}
+
+int main()
+{
+ test01();
+ return 0;
+}