rem: throw new Error("parent has recurrenceId: " + item.parentItem.recurrenceId); 
add: throw new Components.Exception("parent has recurrenceId: " + item.parentItem.recurrenceId); 
context: function isParent( item ){    if (item.id != item.parentItem.id)        throw new Error("proxy has different id than its parent!");    if (item.parentItem.recurrenceId) {        throw new Error("parent has recurrenceId: " +                        item.parentItem.recurrenceId);    }    return (!item.recurrenceId);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/30d02961047b21c123c6585c71a085e40f3e6fa5/calWcapUtils.js/buggy/calendar/providers/wcap/calWcapUtils.js