Failing test when run as C++11

[Jonathan Wakely]

Here's a minimal version of the test:

#include <vector>
#include <cstdlib>

struct C 
{
  C() { }
  C(const C&) { }

  template<class T>
    explicit C(T&) { std::abort(); }
};

int main() 
{
  std::vector<C> v(1);
  v.resize(v.capacity()+1);
}

This aborts with GCC 4.4 in c++03 mode, passes in c++0x mode.

With later releases it passes in c++03 mode, aborts in c++11 mode.

This patch to trunk makes the test pass unchanged in C++11 mode, by
copying the existing vector elements as const lvalues:

index f4522a4..5d420ba 100644
--- a/libstdc++-v3/include/bits/stl_iterator.h
+++ b/libstdc++-v3/include/bits/stl_iterator.h
@@ -1154,6 +1154,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     __make_move_if_noexcept_iterator(_Iterator __i)
     { return _ReturnType(__i); }
 
+  template<typename _Tp, typename _ReturnType
+    = typename conditional<__move_if_noexcept_cond<_Tp>::value,
+                          const _Tp*, move_iterator<_Tp*>>::type>
+    inline _ReturnType
+    __make_move_if_noexcept_iterator(_Tp* __i)
+    { return _ReturnType(__i); }
+
   // @} group iterators
 
 _GLIBCXX_END_NAMESPACE_VERSION