https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87633
--- Comment #6 from Yury Gribov <ygribov at gcc dot gnu.org> --- Seems isl bootstrap is broken in trunk: /home/yugr/src/gcc-87633-ref/isl/isl_tab_pip.c: In function ‘isl_tab_basic_set_non_trivial_lexmin’: /home/yugr/src/gcc-87633-ref/isl/isl_tab_pip.c:5087:21: internal compiler error: in check, at tree-vrp.c:155 5087 | __isl_give isl_vec *isl_tab_basic_set_non_trivial_lexmin(
