https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Jan de Mooij from comment #10) > Richards, thank you for fixing that. > > Unfortunately Firefox still crashes and my original test case (see comment 0 > and the attachment) still fails. Do you have any idea why? The patch has not yet been backported to GCC 5.