Use ::new to avoid finding overloaded operator new

	PR libstdc++/72820
	* include/std/functional (_Function_base::_Base_manager::_M_clone):
	Qualify new operator.
	* testsuite/20_util/function/cons/72820.cc: New test.

From-SVN: r239191

libstdc++-v3/ChangeLog

 2016-08-06  Jonathan Wakely  <jwakely@redhat.com>
 
+	PR libstdc++/72820
+	* include/std/functional (_Function_base::_Base_manager::_M_clone):
+	Qualify new operator.
+	* testsuite/20_util/function/cons/72820.cc: New test.
+
 	* doc/xml/manual/status_cxx2017.xml: Add missing LFTSv2 features.
 	* doc/html/manual/status.html: Regenerate.
 	* include/Makefile.am: Add new header.

libstdc++-v3/include/std/functional

@@ -1472,7 +1472,7 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
 	static void
 	_M_clone(_Any_data& __dest, const _Any_data& __source, true_type)
 	{
-	  new (__dest._M_access()) _Functor(__source._M_access<_Functor>());
+	  ::new (__dest._M_access()) _Functor(__source._M_access<_Functor>());
 	}
 
 	// Clone a function object that is not location-invariant or
@@ -1553,7 +1553,7 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
       private:
 	static void
 	_M_init_functor(_Any_data& __functor, _Functor&& __f, true_type)
-	{ new (__functor._M_access()) _Functor(std::move(__f)); }
+	{ ::new (__functor._M_access()) _Functor(std::move(__f)); }
 
 	static void
 	_M_init_functor(_Any_data& __functor, _Functor&& __f, false_type)

libstdc++-v3/testsuite/20_util/function/cons/72820.cc

+// Copyright (C) 2016 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-do compile { target c++11 } }
+
+#include <functional>
+
+struct foo {
+  void operator()() { }
+  static void* operator new(std::size_t, void* p);
+};
+
+std::function<void()> f = foo{};