Gentoo's Bugzilla –
Attachment 573208 Details for
Bug 683704net-vpn/i2pd-2.23.0 : /.../HTTPServer.cpp:801:39: error: using element_type = class boost::asio::basic_stream_socket<boost::asio::ip::tcp> {aka class boost::asio::basic_stream_socket<boost::asio::ip::tcp> } has no member n