http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52841
fabien at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |WAITING AssignedTo|fabien at gcc dot gnu.org |unassigned at gcc dot | |gnu.org --- Comment #10 from fabien at gcc dot gnu.org 2012-05-04 19:45:46 UTC --- I no longer work on it, so it is more honest to set this bug as unassigned. The patch I attached here fixes the problem, because it bypasses a deeper issues. Returning the earliest possible in cp_parser_alias_declaration makes sense to me because there are probably much more using-declarations than alias-declarations to parse at the moment. However, I do not want to submit it because I think we should fix the real issue as well. I had a look on non-matching parse_tentatively/definitely, without finding anything suspect. If one needs some details about what goes wrong -- if I was unclear here and in previous comments --, do not hesitate to ask me.