add: if (!this._outputStream) return; 
context:   registryKeyValueSet: function(keyPath, valueName) {    this._writeLine(        PREFIX_STORE_REGISTRY_VALUE_STRING + keyPath + " [" + valueName + "]");  },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/77a545c6d7a63f393074d49d0850f3fedb0bc5fa/nsPostUpdateWin.js/clean/toolkit/mozapps/update/src/nsPostUpdateWin.js