rem: d.addErrback(function (err) { if (err instanceof CancelledError) { return; 
add: d.addErrback(function (err) { if (err instanceof CancelledError) { return; 
context: 		d.addErrback(function (err) {         if (err instanceof CancelledError) {           return;         }        alert(err);      });
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/9421/838a3f38df6e9bd6fd899d9909b263e01aed1e26/common.js/buggy/testing/extensions/community/chrome/content/common.js