add:  for each (exitem in this.mExceptions) { exitem.item.parentItem = value; } 
context:     set item(value) {        if (this.mImmutable)            throw Components.results.NS_ERROR_OBJECT_IS_IMMUTABLE;        this.mBaseItem = value;    },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/5906b996bc0c90fb48269f12e83119c5c2bcd9ff/calRecurrenceInfo.js/buggy/calendar/base/src/calRecurrenceInfo.js