--- 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);