http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51937
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-27 17:54:18 UTC --- Consider converting local_specializations in cp/pt.c to pointer_map: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51852#c18