# Pastebin 04BKcwIK
$ cat -n bhyverun.c | grep -B 1 "exit(4)"        
   431			EPRINTLN("Attempting to delete unknown cpu %d", vcpu);
   432			exit(4);
--
   480				warnx("vm_loop: unexpected exitcode 0x%x", exitcode);
   481				exit(4);
--
   491			default:
   492				exit(4);
--
   699				guest_ncpus, max_vcpus);
   700			exit(4);
--
   724			fprintf(stderr, "Unable to setup memory (%d)\n", errno);
   725			exit(4);
--
   730		if (bhyve_init_platform(ctx, bsp) != 0)
   731			exit(4);
--
   734			fprintf(stderr, "qemu fwcfg initialization error\n");
   735			exit(4);
--
   740			fprintf(stderr, "Could not add qemu fwcfg opt/bhyve/hw.ncpu\n");
   741			exit(4);
--
   749			   strerror(errno));
   750			exit(4);
--
   753			EPRINTLN("Failed to init TPM device");
   754			exit(4);
--
   808		if (bhyve_init_platform_late(ctx, bsp) != 0)
   809			exit(4);
--
   850	
   851		exit(4);