1 files changed, 59 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/23_containers/unordered_multimap/insert/52476.cc b/libstdc++-v3/testsuite/23_containers/unordered_multimap/insert/52476.cc
new file mode 100644
index 00000000000..f4f78398878
--- /dev/null
+++ b/libstdc++-v3/testsuite/23_containers/unordered_multimap/insert/52476.cc
@@ -0,0 +1,59 @@
+// { dg-options "-std=gnu++0x" }
+//
+// Copyright (C) 2012 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 <unordered_map>
+#include <vector>
+#include <algorithm>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+  
+  unordered_multimap<int, int> mmap;
+  vector<int> values;
+
+  size_t nb_bkts = mmap.bucket_count();
+  int i = 0;
+  for (;; ++i)
+    {
+      mmap.insert(make_pair(0, i));
+      if (mmap.bucket_count() != nb_bkts)
+	// Container got rehash
+	break;
+      values.clear();
+      transform(mmap.begin(), mmap.end(), back_inserter(values),
+		[](const pair<int, int>& p) { return p.second; });
+    }
+
+  vector<int> rehash_values;
+  transform(mmap.begin(), mmap.end(), back_inserter(rehash_values),
+	    [](const pair<int, int>& p) { return p.second; });
+  // Remove the value that result in a rehash
+  rehash_values.erase(remove(rehash_values.begin(), rehash_values.end(), i));
+
+  VERIFY( rehash_values == values );
+}
+  
+int main()
+{
+  test01();
+  return 0;
+}