http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59305
--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > on x86_64-apple-darwin12. Can someone confirm that we have both support > for floating-point exceptions and the required hook on darwin? I cannot answer these questions. > If so, I suspect we are tickling a pthread bug on darwin. But as said in comment 2, the test succeeds on a loaded machine, i.e., with -j=n, where n is the number of available threads. So I share the suspicion.