Misspelling templateUrl blocks application loading without any errors

[tanelainla]

When I mistype templateUrl in the @Component annotation and then import that component into my root component then the application stops loading and I don't get any error message into logs/debugger. Tracking down these kind of issues in larger applications is a pain (commenting stuff out etc.). There should be graceful error like "Templete not found" or something similar.

@Component(
    selector: 'item-list',
    templateUrl: 'mis_spelled_garbage_here',