rem: var sourceText = sourceView.childData; if (sourceText && sourceText.url in sourceView.savedState) 
add: if ("childData" in sourceView) 
context:     function cb ()    {        var sourceText = sourceView.childData;        if (sourceText && sourceText.url in sourceView.savedState)        {            //dd ("clearing lastRowCount");            delete sourceView.savedState[sourceText.url].lastRowCount;        }        sourceView.syncTreeView();        sourceView.urlLabel = getChildById(sourceView.currentContent,                                           "source-url");        sourceView.syncHeader();    };
meta: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/dec4f242212cf0b590a999acd92083ffce7cbd59/venkman-views.js/buggy/extensions/venkman/resources/content/venkman-views.js