obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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4 files changed, 276 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/char/1.cc b/libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/char/1.cc
new file mode 100644
index 000000000..a8be7b69a
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/char/1.cc
@@ -0,0 +1,75 @@
+// 2004-10-01  Paolo Carlini  <pcarlini@suse.de>
+
+// Copyright (C) 2004, 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/>.
+
+// 27.7.1.3  Overridden virtual functions  [lib.stringbuf.virtuals]
+
+#include <sstream>
+#include <testsuite_hooks.h>
+
+class my_stringbuf : public std::stringbuf
+{
+public:
+  my_stringbuf(const std::string& str, std::ios_base::openmode mode)
+  : std::stringbuf(str, mode) { }
+
+  int_type 
+  pub_pbackfail(int_type c) 
+  { return this->pbackfail(c); }
+};
+
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  using namespace std;
+
+  typedef my_stringbuf::int_type    int_type;
+  typedef my_stringbuf::traits_type traits_type;
+
+  my_stringbuf sbuf("any", ios_base::in | ios_base::out);
+
+  int_type c = sbuf.sgetc();
+  VERIFY( c == 'a' );
+
+  c = sbuf.pub_pbackfail('z');
+  VERIFY( c == traits_type::eof() );
+  c = sbuf.sbumpc();
+  VERIFY( c == 'a' );
+ 
+  c = sbuf.pub_pbackfail('a');
+  VERIFY( c == 'a' );
+  c = sbuf.sbumpc();
+  VERIFY( c == 'a' );
+  
+  c = sbuf.pub_pbackfail('x');
+  VERIFY( c == 'x' );
+  c = sbuf.sbumpc();
+  VERIFY( c == 'x' );
+
+  const int_type eof = traits_type::eof();
+  c = sbuf.pub_pbackfail(eof);
+  VERIFY( c == traits_type::not_eof(eof) );
+  c = sbuf.sgetc();
+  VERIFY( c == 'x' );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/char/2.cc b/libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/char/2.cc
new file mode 100644
index 000000000..abe8bb0e7
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/char/2.cc
@@ -0,0 +1,63 @@
+// 2004-10-01  Paolo Carlini  <pcarlini@suse.de>
+
+// Copyright (C) 2004, 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/>.
+
+// 27.7.1.3  Overridden virtual functions  [lib.stringbuf.virtuals]
+
+#include <sstream>
+#include <testsuite_hooks.h>
+
+class my_stringbuf : public std::stringbuf
+{
+public:
+  my_stringbuf(const std::string& str, std::ios_base::openmode mode)
+  : std::stringbuf(str, mode) { }
+
+  int_type 
+  pub_pbackfail(int_type __c) 
+  { return this->pbackfail(__c); }
+};
+
+// We weren't enforcing 27.7.1.3/2, bullet 2: "... and if
+// mode & ios_base::out is nonzero, ..."
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  using namespace std;
+
+  typedef my_stringbuf::int_type    int_type;
+  typedef my_stringbuf::traits_type traits_type;
+
+  my_stringbuf sbuf("any", ios_base::in);
+  
+  int_type c = sbuf.sbumpc();
+  VERIFY( c == 'a' );
+
+  c = sbuf.pub_pbackfail('x');
+  VERIFY( c == traits_type::eof() );
+  VERIFY( sbuf.str() == "any" );
+  c = sbuf.sgetc();
+  VERIFY( c == 'n' );
+}
+
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/wchar_t/1.cc b/libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/wchar_t/1.cc
new file mode 100644
index 000000000..9854db5c6
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/wchar_t/1.cc
@@ -0,0 +1,75 @@
+// 2004-10-01  Paolo Carlini  <pcarlini@suse.de>
+
+// Copyright (C) 2004, 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/>.
+
+// 27.7.1.3  Overridden virtual functions  [lib.stringbuf.virtuals]
+
+#include <sstream>
+#include <testsuite_hooks.h>
+
+class my_stringbuf : public std::wstringbuf
+{
+public:
+  my_stringbuf(const std::wstring& str, std::ios_base::openmode mode)
+  : std::wstringbuf(str, mode) { }
+
+  int_type 
+  pub_pbackfail(int_type c) 
+  { return this->pbackfail(c); }
+};
+
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  using namespace std;
+
+  typedef my_stringbuf::int_type    int_type;
+  typedef my_stringbuf::traits_type traits_type;
+
+  my_stringbuf sbuf(L"any", ios_base::in | ios_base::out);
+  
+  int_type c = sbuf.sgetc();
+  VERIFY( c == L'a' );
+
+  c = sbuf.pub_pbackfail(L'z');
+  VERIFY( c == traits_type::eof() );
+  c = sbuf.sbumpc();
+  VERIFY( c == L'a' );
+ 
+  c = sbuf.pub_pbackfail(L'a');
+  VERIFY( c == L'a' );
+  c = sbuf.sbumpc();
+  VERIFY( c == L'a' );
+  
+  c = sbuf.pub_pbackfail(L'x');
+  VERIFY( c == L'x' );
+  c = sbuf.sbumpc();
+  VERIFY( c == L'x' );
+
+  const int_type eof = traits_type::eof();
+  c = sbuf.pub_pbackfail(eof);
+  VERIFY( c == traits_type::not_eof(eof) );
+  c = sbuf.sgetc();
+  VERIFY( c == L'x' );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/wchar_t/2.cc b/libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/wchar_t/2.cc
new file mode 100644
index 000000000..7063b7d27
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/wchar_t/2.cc
@@ -0,0 +1,63 @@
+// 2004-10-01  Paolo Carlini  <pcarlini@suse.de>
+
+// Copyright (C) 2004, 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/>.
+
+// 27.7.1.3  Overridden virtual functions  [lib.stringbuf.virtuals]
+
+#include <sstream>
+#include <testsuite_hooks.h>
+
+class my_stringbuf : public std::wstringbuf
+{
+public:
+  my_stringbuf(const std::wstring& str, std::ios_base::openmode mode)
+  : std::wstringbuf(str, mode) { }
+
+  int_type 
+  pub_pbackfail(int_type __c) 
+  { return this->pbackfail(__c); }
+};
+
+// We weren't enforcing 27.7.1.3/2, bullet 2: "... and if
+// mode & ios_base::out is nonzero, ..."
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  using namespace std;
+
+  typedef my_stringbuf::int_type    int_type;
+  typedef my_stringbuf::traits_type traits_type;
+
+  my_stringbuf sbuf(L"any", ios_base::in);
+  
+  int_type c = sbuf.sbumpc();
+  VERIFY( c == L'a' );
+
+  c = sbuf.pub_pbackfail(L'x');
+  VERIFY( c == traits_type::eof() );
+  VERIFY( sbuf.str() == L"any" );
+  c = sbuf.sgetc();
+  VERIFY( c == L'n' );
+}
+
+
+int main()
+{
+  test01();
+  return 0;
+}