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diff --git a/i686-linux-gnu-4.7/usr/include/c++/4.7/ext/pb_ds/detail/thin_heap_/debug_fn_imps.hpp b/i686-linux-gnu-4.7/usr/include/c++/4.7/ext/pb_ds/detail/thin_heap_/debug_fn_imps.hpp
new file mode 100644
index 0000000..3eb8541
--- /dev/null
+++ b/i686-linux-gnu-4.7/usr/include/c++/4.7/ext/pb_ds/detail/thin_heap_/debug_fn_imps.hpp
@@ -0,0 +1,119 @@
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 2009, 2010, 2011 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file thin_heap_/debug_fn_imps.hpp
+ * Contains an implementation for thin_heap_.
+ */
+
+#ifdef _GLIBCXX_DEBUG
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_valid(const char* __file, int __line) const
+{
+  base_type::assert_valid(__file, __line);
+  assert_node_consistent(base_type::m_p_root, true, __file, __line);
+  assert_max(__file, __line);
+  assert_aux_null(__file, __line);
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_aux_null(const char* __file, int __line) const
+{
+  for (size_type i = 0; i < max_rank; ++i)
+    PB_DS_DEBUG_VERIFY(m_a_aux[i] == 0);
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_max(const char* __file, int __line) const
+{
+  if (m_p_max == 0)
+    {
+      PB_DS_DEBUG_VERIFY(base_type::empty());
+      return;
+    }
+
+  PB_DS_DEBUG_VERIFY(!base_type::empty());
+  PB_DS_DEBUG_VERIFY(base_type::parent(m_p_max) == 0);
+  PB_DS_DEBUG_VERIFY(m_p_max->m_p_prev_or_parent == 0);
+  for (const_iterator it = base_type::begin(); it != base_type::end(); ++it)
+    PB_DS_DEBUG_VERIFY(!Cmp_Fn::operator()(m_p_max->m_value, it.m_p_nd->m_value));
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_node_consistent(node_const_pointer p_nd, bool root,
+		       const char* __file, int __line) const
+{
+  base_type::assert_node_consistent(p_nd, root, __file, __line);
+  if (p_nd == 0)
+    return;
+
+  assert_node_consistent(p_nd->m_p_next_sibling, root, __file, __line);
+  assert_node_consistent(p_nd->m_p_l_child, false, __file, __line);
+  if (!root)
+    {
+      if (p_nd->m_metadata == 0)
+	PB_DS_DEBUG_VERIFY(p_nd->m_p_next_sibling == 0);
+      else
+	PB_DS_DEBUG_VERIFY(p_nd->m_metadata == p_nd->m_p_next_sibling->m_metadata + 1);
+    }
+
+  if (p_nd->m_p_l_child != 0)
+    PB_DS_DEBUG_VERIFY(p_nd->m_p_l_child->m_metadata + 1 == base_type::degree(p_nd));
+
+  const bool unmarked_valid =
+    (p_nd->m_p_l_child == 0 && p_nd->m_metadata == 0)
+    || (p_nd->m_p_l_child != 0
+	 && p_nd->m_metadata == p_nd->m_p_l_child->m_metadata + 1);
+
+  const bool marked_valid =
+    (p_nd->m_p_l_child == 0 && p_nd->m_metadata == 1)
+    || (p_nd->m_p_l_child != 0
+	&& p_nd->m_metadata == p_nd->m_p_l_child->m_metadata + 2);
+
+  PB_DS_DEBUG_VERIFY(unmarked_valid || marked_valid);
+  if (root)
+    PB_DS_DEBUG_VERIFY(unmarked_valid);
+}
+
+#endif