Gentoo's Bugzilla –
Attachment 446258 Details for
Bug 594146games-util/grfcodec-6.0.5 : src/pseudo.cpp:719:100: error: no match for ‘operator<’ (operand types are ‘std::_Bind_helper<false, long unsigned int (std::vector<std::__cxx11::basic_string<char>, std::allocator<std::__cxx11::basic_string<char> > >::*)