add_shortcode parsed incorrectly.

The short-code parser incorrectly parsed the attribute value even when the magic character “]” within the quote mark.

Sample code: info-box-parser.php

<?php
/*
 * Plugin Name: Short-Code Bug Test
 * Description: Short-Code Bug Test
 * Version: 1.0
 * Author: Jixun.Moe
 */

function infobox_parse ($atts, $content = null) {
	echo "--- [  ATTS   ] ---\n";
	var_dump ($atts);
	echo "--- [ CONTENT ] ---\n";
	var_dump ($content);
	echo "--- --- --- --- ---";
    return $content;
}

add_shortcode ('infobox', 'infobox_parse');

Post content:
[infobox title="[tag1] [tag2] title"][/infobox]

Expected result:

--- [  ATTS   ] ---
array(1) {
  ["title"]=>
  string(19) "[tag1] [tag2] title"
}
--- [ CONTENT ] ---
string(0) ""
--- --- --- --- ---

Actual output:

--- [  ATTS   ] ---
array(1) {
  [0]=>
  string(12) "title="[tag1"
}
--- [ CONTENT ] ---
string(21) " [tag2] title”]"
--- --- --- --- ---

Thanks in advance.