--- a/src/krb5ticketwatcher.cpp

+++ a/src/krb5ticketwatcher.cpp

@@ -1219,7 +1219,11 @@ Ktw::buildCcacheInfos()

     	goto done;

     }

-    ticketView->topLevelItem(0)->setExpanded(true);

+    {

+	QTreeWidgetItem* itm(ticketView->topLevelItem(0));

+	if( itm )

+	    itm->setExpanded(true);

+    }

     ticketView->resizeColumnToContents(0);

     ticketView->resizeColumnToContents(1);