Remove noexcept from function template that can throw

PR libstdc++/69092
	* include/bits/basic_string.h (basic_string::_S_copy_chars<_Iterator>):
	Remove _GLIBCXX_NOEXCEPT.
	testsuite/21_strings/basic_string/cons/char/69092.cc: New.

From-SVN: r232282

libstdc++-v3/ChangeLog

@@ -1,5 +1,10 @@
 2016-01-12  Jonathan Wakely  <jwakely@redhat.com>
 
+	PR libstdc++/69092
+	* include/bits/basic_string.h (basic_string::_S_copy_chars<_Iterator>):
+	Remove _GLIBCXX_NOEXCEPT.
+	testsuite/21_strings/basic_string/cons/char/69092.cc: New.
+
 	PR libstdc++/68995
 	* include/std/functional (_Function_handler::_M_invoke): Qualify
 	__callable_functor.

libstdc++-v3/include/bits/basic_string.h

@@ -322,7 +322,6 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
       template<class _Iterator>
         static void
         _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
-	_GLIBCXX_NOEXCEPT
         {
 	  for (; __k1 != __k2; ++__k1, ++__p)
 	    traits_type::assign(*__p, *__k1); // These types are off.
@@ -2782,7 +2781,6 @@ _GLIBCXX_END_NAMESPACE_CXX11
       template<class _Iterator>
         static void
         _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
-	_GLIBCXX_NOEXCEPT
         {
 	  for (; __k1 != __k2; ++__k1, ++__p)
 	    traits_type::assign(*__p, *__k1); // These types are off.

libstdc++-v3/testsuite/21_strings/basic_string/cons/char/69092.cc

@@ -0,0 +1,58 @@
+// 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-options "-std=gnu++11" }
+
+// PR libstdc++/69092
+
+#include <string>
+#include <iterator>
+
+struct hate_T_iterator : std::iterator<std::forward_iterator_tag, char> {
+    explicit hate_T_iterator(char* p) : p(p) {}
+    char* p;
+
+    hate_T_iterator& operator++() { ++p; return *this; }
+
+    hate_T_iterator operator++(int)
+    {
+      hate_T_iterator r = *this;
+      ++*this; return r;
+    }
+
+    char& operator*() const
+    {
+      if (*p == 'T')
+        throw 1;
+      return *p;
+    }
+
+    char* operator->() const { return p; }
+
+    bool operator== (hate_T_iterator other) const { return p == other.p;}
+    bool operator!= (hate_T_iterator other) const { return p != other.p;}
+};
+
+int main()
+{
+  char test_str[4] = "ATA";
+  try {
+    std::string s(hate_T_iterator(test_str), hate_T_iterator(test_str+3));
+  }
+  catch(int) {
+  }
+}