re PR libstdc++/61143 (Arithmetic exception on emplacing into unordered_map moved out)

2014-05-21  François Dumont  <fdumont@gcc.gnu.org>

	PR libstdc++/61143
	* include/bits/hashtable.h: Fix move semantic to leave hashtable in a
	usable state.
	* testsuite/23_containers/unordered_set/61143.cc: New.
	* testsuite/23_containers/unordered_set/modifiers/swap.cc: New.

From-SVN: r210726

libstdc++-v3/ChangeLog

+2014-05-21  François Dumont  <fdumont@gcc.gnu.org>
+
+	PR libstdc++/61143
+	* include/bits/hashtable.h: Fix move semantic to leave hashtable in a
+	usable state.
+	* testsuite/23_containers/unordered_set/61143.cc: New.
+	* testsuite/23_containers/unordered_set/modifiers/swap.cc: New.
+
 2014-05-21  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR libstdc++/61269

libstdc++-v3/testsuite/23_containers/unordered_set/61143.cc

+// { dg-options "-std=gnu++11" }
+
+// Copyright (C) 2014 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/>.
+
+// libstdc++/61143
+
+#include <unordered_set>
+
+void test01()
+{
+  std::unordered_set<int> us1, us2;
+  us1.insert(1);
+
+  us2 = std::move(us1);
+
+  us1.insert(1);
+}
+
+int main()
+{
+  test01();
+  return 0;
+}

libstdc++-v3/testsuite/23_containers/unordered_set/modifiers/swap.cc

+// Copyright (C) 2014 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/>.
+
+// { dg-options "-std=gnu++11" }
+
+#include <unordered_set>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  std::unordered_set<int> us1 { 0, 1 };
+  {
+    std::unordered_set<int> us2(std::move(us1));
+
+    us1.swap(us2);
+
+    VERIFY( us1.find(0) != us1.end() );
+
+    us1.insert(2);
+
+    VERIFY( us1.size() == 3 );
+
+    us2.swap(us1);
+
+    VERIFY( us2.size() == 3 );
+    VERIFY( us2.find(2) != us2.end() );
+
+    us1 = { 3, 4, 5 };
+
+    VERIFY( us1.size() == 3 );
+    VERIFY( us1.bucket_count() >= 3 );
+
+    std::unordered_set<int> us3(std::move(us1));
+    us3 = std::move(us2);
+
+    us1.swap(us2);
+
+    VERIFY( us1.empty() );
+    VERIFY( us2.empty() );
+  }
+
+  us1 = { 0, 1 };
+  VERIFY( us1.size() == 2 );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}