您好我正在尝试调试Angular 5应用程序构建以进行生产。现在我正在运行构建工件，包括sourcemaps，我正在使用命令
构建角度应用程序 build --prod --env=prod --build-optimizer --sourcemaps
比我有这样的堆栈登录到appinsights
TypeError: this._results.find is not a function
at e.find (https://gilitickets.azureedge.net/bookingapp-live/20180503.2/main.8ea73b7f474a1fff0865.bundle.js:1:70596)
at n._syncDescribedByIds (https://gilitickets.azureedge.net/bookingapp-live/20180503.2/main.8ea73b7f474a1fff0865.bundle.js:1:1318967)
at n._next (https://gilitickets.azureedge.net/bookingapp-live/20180503.2/main.8ea73b7f474a1fff0865.bundle.js:1:1316635)
at n.__tryOrSetError (https://gilitickets.azureedge.net/bookingapp-live/20180503.2/main.8ea73b7f474a1fff0865.bundle.js:1:36100)
at n.next (https://gilitickets.azureedge.net/bookingapp-live/20180503.2/main.8ea73b7f474a1fff0865.bundle.js:1:35211)
at n._next (https://gilitickets.azureedge.net/bookingapp-live/20180503.2/main.8ea73b7f474a1fff0865.bundle.js:1:34345)
at n.next (https://gilitickets.azureedge.net/bookingapp-live/20180503.2/main.8ea73b7f474a1fff0865.bundle.js:1:34016)
at n.notifyNext (https://gilitickets.azureedge.net/bookingapp-live/20180503.2/main.8ea73b7f474a1fff0865.bundle.js:1:39157)
at n._next (https://gilitickets.azureedge.net/bookingapp-live/20180503.2/main.8ea73b7f474a1fff0865.bundle.js:1:36623)
at n.next (https://gilitickets.azureedge.net/bookingapp-live/20180503.2/main.8ea73b7f474a1fff0865.bundle.js:1:34016)
并感谢npm包sourcemapped-stacktrace
我可以追溯到
TypeError: Array.from is not a function
at find (webpack:///node_modules/@angular/core/esm5/core.js.pre-build-optimizer.js:6336:29)
at find (webpack:///node_modules/@angular/material/esm5/form-field.es5.js.pre-build-optimizer.js:607:39)
at _syncDescribedByIds (webpack:///node_modules/@angular/material/esm5/form-field.es5.js.pre-build-optimizer.js:400:18)
at call (webpack:///node_modules/rxjs/_esm5/Subscriber.js.pre-build-optimizer.js:249:15)
at __tryOrSetError (webpack:///node_modules/rxjs/_esm5/Subscriber.js.pre-build-optimizer.js:189:26)
at next (webpack:///node_modules/rxjs/_esm5/Subscriber.js.pre-build-optimizer.js:128:25)
at _next (webpack:///node_modules/rxjs/_esm5/Subscriber.js.pre-build-optimizer.js:92:17)
at next (webpack:///node_modules/rxjs/_esm5/operators/mergeMap.js.pre-build-optimizer.js:151:29)
at notifyNext (webpack:///node_modules/rxjs/_esm5/InnerSubscriber.js.pre-build-optimizer.js:25:20)
at _next (webpack:///node_modules/rxjs/_esm5/Subscriber.js.pre-build-optimizer.js:92:17)
这是我不理解的部分。为什么构建优化器可以在浏览器的正常运行期间抛出异常。有人可以告诉我我错过了什么吗？或者为什么我从webpack而不是我的代码中看到stacktrace？