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diff --git a/libstdc++-v3/testsuite/22_locale/num_put/put/char/6.cc b/libstdc++-v3/testsuite/22_locale/num_put/put/char/6.cc
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+++ b/libstdc++-v3/testsuite/22_locale/num_put/put/char/6.cc
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+// 2003-02-05 Paolo Carlini <pcarlini@unitus.it>
+
+// Copyright (C) 2003, 2009 Free Software Foundation
+//
+// 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/>.
+
+// 22.2.2.2.1  num_put members
+
+#include <locale>
+#include <sstream>
+#include <testsuite_hooks.h>
+
+// libstdc++/9548 and DR 231
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  ostringstream oss1, oss2;
+  const num_put<char>& np1 = use_facet<num_put<char> >(oss1.getloc());
+  const num_put<char>& np2 = use_facet<num_put<char> >(oss2.getloc());
+
+  string result1, result2;
+
+  oss1.precision(-1);
+  oss1.setf(ios_base::fixed, ios_base::floatfield);
+  np1.put(oss1.rdbuf(), oss1, '+', 30.5);
+  result1 = oss1.str();
+  VERIFY( result1 == "30.500000" );
+
+  oss2.precision(0);
+  oss2.setf(ios_base::scientific, ios_base::floatfield);
+  np2.put(oss2.rdbuf(), oss2, '+', 1.0);
+  result2 = oss2.str();
+  VERIFY( result2 == "1e+00" );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}