add: print("*** Throwing trying to get " + prop); 
context:     getFile: function(prop, persistent) {      persistent.value = true;      if (prop == "ProfD") {        return dirSvc.get("CurProcD", Ci.nsILocalFile);      } else if (prop == "DLoads") {        var file = dirSvc.get("CurProcD", Ci.nsILocalFile);        file.append("downloads.rdf");        return file;      }      throw Cr.NS_ERROR_FAILURE;    },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10234/d13f6121d99057fa2d859167c84f30c00f619921/head_download_manager.js/clean/toolkit/components/downloads/test/unit/head_download_manager.js