/usr/include/c++/4.4/tr1/tuple: In constructor ‘std::tr1::_Tuple_impl<_Idx, _Head, _Tail ...>::_Tuple_impl(const std::tr1::_Tuple_impl<_Idx, _UElements ...>&) [with _UElements = , int _Idx = 4, _Head = string, _Tail = ]’:
/usr/include/c++/4.4/tr1/tuple:104:   instantiated from ‘std::tr1::_Tuple_impl<_Idx, _Head, _Tail ...>::_Tuple_impl(const std::tr1::_Tuple_impl<_Idx, _UElements ...>&) [with _UElements = int, int _Idx = 3, _Head = int, _Tail = string]’
/usr/include/c++/4.4/tr1/tuple:104:   instantiated from ‘std::tr1::_Tuple_impl<_Idx, _Head, _Tail ...>::_Tuple_impl(const std::tr1::_Tuple_impl<_Idx, _UElements ...>&) [with _UElements = string, int, int _Idx = 2, _Head = string, _Tail = int, string]’
/usr/include/c++/4.4/tr1/tuple:104:   instantiated from ‘std::tr1::_Tuple_impl<_Idx, _Head, _Tail ...>::_Tuple_impl(const std::tr1::_Tuple_impl<_Idx, _UElements ...>&) [with _UElements = string, string, int, int _Idx = 1, _Head = string, _Tail = string, int, string]’
/usr/include/c++/4.4/tr1/tuple:104:   instantiated from ‘std::tr1::_Tuple_impl<_Idx, _Head, _Tail ...>::_Tuple_impl(const std::tr1::_Tuple_impl<_Idx, _UElements ...>&) [with _UElements = int, string, string, int, int _Idx = 0, _Head = int, _Tail = string, string, int, string]’
/usr/include/c++/4.4/tr1/tuple:141:   instantiated from ‘std::tr1::tuple<_Elements>::tuple(const std::tr1::tuple<_UElements ...>&) [with _UElements = int, string, string, int, _Elements = int, string, string, int, string]’
User.cc:109:   instantiated from here
/usr/include/c++/4.4/tr1/tuple:104: error: ‘const struct std::tr1::_Tuple_impl<4>’ has no member named ‘_M_tail’
/usr/include/c++/4.4/tr1/tuple:104: error: ‘const struct std::tr1::_Tuple_impl<4>’ has no member named ‘_M_head’