dependency-injection: Bug: Cannot use spread with the injector (Injection With Inheritance in Aurelia)

I’m submitting a bug report

• Library Version: 1.4.1 (Webpack build uses native-modules dist)

Please tell us about your environment:

• Operating System: Windows 10

• Node Version: v8.11.1

• Yarn Version: 1.5.1

• Webpack Version Webpack 4.16.5

• Browser: Chrome

• Language: TypeScript 3.0.1

Current behavior: Using the spread operator doesn’t work as per the blog post here with TypeScript, for some reason it seems to generate an additional empty object parameter?

I also have to make each property optional on the base class, which isn’t ideal but workable.

https://ilikekillnerds.com/2016/11/injection-inheritance-aurelia/

import { autoinject, containerless } from 'aurelia-framework';
import { I18N } from 'aurelia-i18n';

@autoinject
@containerless
export abstract class BaseDialog {
	constructor(
		protected readonly controller?: DialogController,
		protected readonly element?: Element,
	) {

	}
}

@autoinject
export class NotesDialog extends BaseDialog {
	constructor(
		protected readonly i18n: I18N,
		protected readonly dialogUtils: DialogUtils,
		...rest
	) {
		super(...rest);
		// rest[0] = {}; <- Why is this empty object here?
		// rest[1] = DialogController
		// rest[2] = Element;
		console.warn('NotesDialog', rest);
	}
}

Additionally, if I console.log the “NotesDialog.inject” static property at run-time, I get:

0: ƒ I18N(ea, signaler)
1: ƒ DialogUtils(dialogService, i18n)
2: ƒ Object()

Expected/desired behavior: I’d expect to be able to use the “…rest” pattern so I don’t need to update each subclass if I update the dependencies on the base class.