507         function onError(err, errback) {  argument
511             if (errback) {
512                 errback(err);
720             init: function (depMaps, factory, errback, options) {  argument
732                 if (errback) {
734                     this.on('error', errback);
738                     errback = bind(this, function (err) {
750                 this.errback = errback;
1095                         if (this.errback) {
1096                             on(depMap, 'error', this.errback);
1337                 function localRequire(deps, callback, errback) {  argument
1347 …                         return onError(makeError('requireargs', 'Invalid require call'), errback);
1392                         requireMod.init(deps, callback, errback, {
1669     req = requirejs = function (deps, callback, errback, optional) {
1682                 callback = errback;
1683                 errback = optional;
1702         return context.require(deps, callback, errback);