C - Field has incomplete type : <p>In the below representation,</p>

<pre><code>struct Cat{
  char *name;
  struct Cat mother;
  struct Cat *children;
};
</code></pre>

<hr>

<p>Compiler gives below error for second field, but not third field,</p>

<pre><code> error: field ‘mother’ has incomplete type
   struct Cat mother;
              ^
</code></pre>

<hr>

<p>How to understand this error?</p>
