https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90938
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> --- There is no cutoff for 9.x (well, in about 2 years from now the branch will be closed), but the branch is used by people in the wild, so especially for regressions from recent releases the sooner it is fixed the better. Of course assuming the fix is safe.