https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81693
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- Created attachment 41915 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41915&action=edit Assemby for pr25967-1 > Please compile it with -g and provide stack backtrace. This is what I have done. bt is * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT) * frame #0: 0x00007fff9e17d2fa libdyld.dylib`stack_not_16_byte_aligned_error > Please also provide the assembly codes of fn and main. Assembly attached.