rem: var file_url = Components.classes["@mozilla.org/network/standard-url;1"].createInstance(Components.interfaces.nsIFileURL); file_url.file = sidebar_file; return file_url.spec; 
add: return sidebar_file.URL; 
context: function get_sidebar_datasource_uri() {  try {    var sidebar_file = sidebar_get_panels_file();    var file_url = Components.classes["@mozilla.org/network/standard-url;1"].createInstance(Components.interfaces.nsIFileURL);    file_url.file = sidebar_file;    return file_url.spec;  } catch (ex) {    // This should not happen    debug("Error: Unable to load panels file.\n");  }  return null;}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/178c09a21833bb8b6fefe3d4f0fe2d3adcea7899/sidebarOverlay.js/buggy/suite/common/sidebar/sidebarOverlay.js