TypeError: Unable to get property ‘data’ of undefined or null reference at Anonymous function (http://localhost:4002/bower_components/angular/angular.js:19427:11) at processQueue (http://localhost:4002/bower_components/angular/angular.js:16383:11) at Anonymous function (http://localhost:4002/bower_components/angular/angular.js:16399:27) at Scope.prototype.$eval (http://localhost:4002/bower_components/angular/angular.js:17682:9) at Scope.prototype.$digest (http://localhost:4002/bower_components/angular/angular.js:17495:15) at Scope.prototype.$apply (http://localhost:4002/bower_components/angular/angular.js:17790:13) at done (http://localhost:4002/bower_components/angular/angular.js:11831:36) at completeRequest (http://localhost:4002/bower_components/angular/angular.js:12033:7) at requestLoaded (http://localhost:4002/bower_components/angular/angular.js:11966:9) angular.js (13920,11)

我怎么跟踪或者定位错误点呢？