https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122785
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> --- I can't reproduce on the reduced testcase. Do you have full backtrace on when maybe_commonize_var is called with the incomplete type? If it is say from cp_finish_decl, how can that ever work with incomplete types when you don't know the size of the type?
