validate_next
({ if (unlikely(!validate_next(t, insn, 0))) goto err_out; __get_next(t, insn); })
({ if (unlikely(!validate_next(t, insn, n))) goto err_out; __peek_nbyte_next(t, insn, n); })
({ if (unlikely(!validate_next(t, insn, 0))) goto err_out; __get_next(t, insn); })
({ if (unlikely(!validate_next(t, insn, n))) goto err_out; __peek_nbyte_next(t, insn, n); })