exit (EXIT_FAILURE);
xexit (EXIT_FAILURE);
as_abort (file, line, fn)     const char *file, *fn;     int line;{  as_show_where ();  fprintf (stderr, "Internal error, aborting at %s line %d", file, line);  if (fn)    fprintf (stderr, " in %s", fn);  fprintf (stderr, "\nPlease report this bug.\n");  exit (EXIT_FAILURE);}