[Bug libstdc++/40156] New: [4.4 Regression] Possible bogus warning in libstdc++ headers

["tbm at cyrius dot com" <gcc-bugzilla at gcc dot gnu dot org>]

I'm getting the following warning when compiling wesnoth.  I'm not sure if
this is a bug in the code or in GCC but Andrew Pinski said I should file a
bug so someone can take a look at it.

This happens with gcc 4.4, but not with 4.3.

(sid)700:tbm@em64t: ~/src/wesnoth-1.6.2/src] g++-4.4 -c -O1 -Wall -Werror
game_preferences.ii
cc1plus: warnings being treated as errors
game_preferences.cpp: In constructor 'preferences::manager::manager()':
game_preferences.cpp:66: error: 'v.std::vector<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >,
std::allocator<std::basic_string<char, std::char_traits<char>,
std::allocator<char> > >
>::<anonymous>.std::_Vector_base<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >,
std::allocator<std::basic_string<char, std::char_traits<char>,
std::allocator<char> > > >::_M_impl.std::_Vector_base<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >,
std::allocator<std::basic_string<char, std::char_traits<char>,
std::allocator<char> > > >::_Vector_impl::_M_start' may be used uninitialized
in this function
game_preferences.cpp:70: error: 'terrain.std::vector<t_translation::t_terrain,
std::allocator<t_translation::t_terrain>
>::<anonymous>.std::_Vector_base<t_translation::t_terrain,
std::allocator<t_translation::t_terrain>
>::_M_impl.std::_Vector_base<t_translation::t_terrain,
std::allocator<t_translation::t_terrain> >::_Vector_impl::_M_start' may be used
uninitialized in this function
zsh: exit 1     g++-4.4 -c -O1 -Wall -Werror game_preferences.ii


-- 
           Summary: [4.4 Regression] Possible bogus warning in libstdc++
                    headers
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tbm at cyrius dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40156