https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82939
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> --- Hmm, somehow I remember reports similar to this on Darwin. Can you try using clang for bootstrap? What X-Code version are you using on which OS version? The crash reporter suggests sth goes wrong with linking as it seems to crash during init already.