I have implemented a tree subcalassing QTreeWidget and subclassed QItemDelegate to paint the items. The items are a set of custom widgets. So far so good. The problem arise when I try to show only the children of a chosen node by doing the following:

Qt Code: 
  1. connect(TreeWidget, SIGNAL(expanded(QModelIndex)), SLOT(setRootIndex(QModelIndex)));
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Then I get: "This application has requested the Runtime to terminate it in an unusual way. (...)"

Any suggestions on what causes my application to crash?