https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92240
--- Comment #4 from Dmitry G. Dyachenko <dimhen at gmail dot com> --- (In reply to Richard Biener from comment #3) > Happends during in-tree build of ISL. Did you do the setup with > ./contrib/download_prerequesites? Yes, I setup with ./contrib/download_prerequesites ICE fixed in r277486
