https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79785
Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org --- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- enum E { e1 = 0xffffffffffffffff, e2 } e = e2; is enough to provoke the ICE. The gimplifier gets "e = <<< error >>>" and crashes at that error_mark. It doesn't ICE with -fsyntax-only.