rem: alert(err); 
add: dump(err); 
context: 		d.addErrback(function (err) {             if (err instanceof CancelledError) {                 return;             }            alert(err);        });
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8395/a3a9a2c311afc9d76e4e6bfc036e5897fa988bc1/litmus.js/buggy/testing/extensions/community/chrome/content/litmus.js