signal_simple_error ("Invalid argument", attributes);
if (!NILP (ccs = Ffind_charset (Fcar (cell)))
&& ((XCHARSET_FINAL (ccs) != 0) ||
signal_simple_error ("Invalid argument", attributes);
if (!NILP (ccs = Ffind_charset (Fcar (cell)))
&& ((XCHARSET_FINAL (ccs) != 0) ||