http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51188
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> 2011-11-17 19:32:13 UTC --- It looks like the sorted fields code in lookup_field_1 needs to handle using_decl like the unsorted fields code does. I think this will also fix PR51141 (instead of the patch you already posted).
