https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104319
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 52337 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52337&action=edit gcc12-pr104319.patch Untested fix. That said, now that I think about it, >>= doesn't need to be misspelling of > >=, but can be also misspelling of >> = e.g. with nested template argument.