title: Cannot step into function of QSortFilterProxyModel
body: <p>I have a line in my code:  </p>
  
  <pre><code>return QSortFilterProxyModel::data(proxyIndex,role);  
  </code></pre>
  
  <p>Yet, when I press step into while debugging, this doesn't do anything, just skips this line. I'm in a debug mode, I have debugging symbols.</p>