startWith undefined on aot build

[renannobile]

I'm currently facing a misterious problem when building my Angular application.

I use Angular-CLI and run ng build --prod --aot.
I then deploy it to Firebase using firebase deploy.

The application starts fine but when it gets to this.searchText.valueChanges.startWith(null), it throws an error because startWith is undefined:

Code runs ok on localhost.

If this is not an issue with RxJS I'm sorry.
Thanks for your time.

[paulpdaniels]

This is probably an issue for RxJS 5 which is not maintained here.

But you likely need to import the method using the import 'rxjs/add/operator/startWith'