Gentoo's Bugzilla –
Attachment 464678 Details for
Bug 610560games-simulation/crrcsim-0.9.13 : src/.../crrc_animation.cpp:87:35: error: no match for ‘operator<<’ (operand types are ‘std::basic_ostream<char>’ and ‘std::ostream {aka std::basic_ostream<char>}’)