Why deleteing a pointer twice will cause crash?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/3117615/why-free-crashes-when-called-twice">Why Free crashes when called twice</a>  </p>
</blockquote>



<p>I just want to know what exactly happened when we delete the pointer that already been deleted, and what cause the crash?</p>

<p>Thanks</p>
