http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57953
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to unixway.drive+gcc from comment #0) > ยง27.5.3 states that "ios_base defines <...> a class failure derived from > system_error". And http://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.2011 states this isn't implemented yet.
