Having issue with class inheritance and circular references

[jacobbrown0192]

Description

I am having an issue with class inheritance and I am not sure if it is a bug or something that I misunderstand.

The situation goes like so: I have a generic class called Base, This class is extended to create a notification class. I have another class used for event dispatching, which dispatches events to the notification class. The base class has an instance of the event dispatcher. Finally, I have another class the extends Base that will send events to the dispatcher called EventSend.

The problem is if all of these four classes are defined in separate files I get a type error
TypeError: Class extends value undefined is not a constructor or null

However, If I bring the notification class into the base class file it compiles and works fine.

//test file
import 'reflect-metadata';
import { Container } from '../../../src/index';
import { EventSend } from './eventsend';

describe('Github Issue', function () {
  it('My Issue', () => {
    const eventSend = Container.get(EventSend);
  });
});

// dispatcher.ts
import { Inject, Service } from '../../../src';
import { Notifications } from './notifications';

@Service()
export class Dispatcher {
  @Inject(() => Notifications)
  notifications: Notifications
}

// notifications.ts
import { Service } from '../../../src';
import { Base } from './base';

@Service()
export class Notifications extends Base {}

// event-send.ts
import { Service } from '../../../src';
import { Base } from './base';

@Service()
export class EventSend extends Base {}

// base.ts
import { Inject, Service } from '../../../src';
import { Dispatcher } from './dispatcher';

@Service()
export class Base {
  @Inject(() => Dispatcher)
  public dispatcher: Dispatcher
}

Expected behavior

I would hope this can work with not having my subclass defined in the same file

Actual behavior

Throws error TypeError: Class extends value undefined is not a constructor or null