https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108404
--- Comment #4 from Iain Sandoe <iains at gcc dot gnu.org> --- Works for me - now the failing test cases produce a diagnostic; /src-local/gcc-master/libgm2/libm2iso/RTco.cc:373:in initThread has caused failed to set stack size attribute Although it does not seem to exit the failed program (is that because Halt eventually does a loop-forever?)