Angular CLI lazy loading modules bug in 1.7.0, 1.7.1, 1.7.2 and 1.7.3

It is odd that this has not been fixed yet. Seems like a simple case of array not having > 1 elements

Also,
Module being Lazy Loaded cannot be imported into app.module.ts
https://github.com/angular/angular/issues/23412#issuecomment-422682849

which is an issue only JIT.
works fine in AOT

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No solution yet.
Either run:
ng serve --aot

or downgrade.

Discussed here:
https://github.com/angular/angular-cli/issues/9488

Error details:

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ERROR Error: Uncaught (in promise): TypeError: undefined is not a function
TypeError: undefined is not a function
    at Array.map (<anonymous>)
    at webpackAsyncContext ($_lazy_route_resource lazy namespace object:15)
    at SystemJsNgModuleLoader.push../node_modules/@angular/core/fesm5/core.js.SystemJsNgModuleLoader.loadAndCompile (core.js:18359)
    at SystemJsNgModuleLoader.push../node_modules/@angular/core/fesm5/core.js.SystemJsNgModuleLoader.load (core.js:18351)
    at RouterConfigLoader.push../node_modules/@angular/router/fesm5/router.js.RouterConfigLoader.loadModuleFactory (router.js:3614)
    at RouterConfigLoader.push../node_modules/@angular/router/fesm5/router.js.RouterConfigLoader.load (router.js:3602)
    at MergeMapSubscriber.project (router.js:2605)
    at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapSubscriber._tryNext (mergeMap.js:61)
    at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapSubscriber._next (mergeMap.js:51)
    at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber.next (Subscriber.js:54)
    at resolvePromise (zone.js:831)
    at resolvePromise (zone.js:788)
    at zone.js:892
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:423)
    at Object.onInvokeTask (core.js:17290)
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:422)
    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js:195)
    at drainMicroTaskQueue (zone.js:601)

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defaultErrorLogger	@	core.js:15724
	push../node_modules/@angular/core/fesm5/core.js.ErrorHandler.handleError	@	core.js:15772
	next	@	core.js:17771
	schedulerFn	@	core.js:13515
	push../node_modules/rxjs/_esm5/internal/Subscriber.js.SafeSubscriber.__tryOrUnsub	@	Subscriber.js:196
	push../node_modules/rxjs/_esm5/internal/Subscriber.js.SafeSubscriber.next	@	Subscriber.js:134
	push../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber._next	@	Subscriber.js:77
	push../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber.next	@	Subscriber.js:54
	push../node_modules/rxjs/_esm5/internal/Subject.js.Subject.next	@	Subject.js:47
	push../node_modules/@angular/core/fesm5/core.js.EventEmitter.emit	@	core.js:13499
	(anonymous)	@	core.js:17321
	push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke	@	zone.js:391
	push../node_modules/zone.js/dist/zone.js.Zone.run	@	zone.js:150
	push../node_modules/@angular/core/fesm5/core.js.NgZone.runOutsideAngular	@	core.js:17258
	onHandleError	@	core.js:17321
	push../node_modules/zone.js/dist/zone.js.ZoneDelegate.handleError	@	zone.js:395
	push../node_modules/zone.js/dist/zone.js.Zone.runGuarded	@	zone.js:164
	_loop_1	@	zone.js:694
	api.microtaskDrainDone	@	zone.js:703
	drainMicroTaskQueue	@	zone.js:608
	Promise.then (async)
	scheduleMicroTask	@	zone.js:584
	push../node_modules/zone.js/dist/zone.js.ZoneDelegate.scheduleTask	@	zone.js:413
	push../node_modules/zone.js/dist/zone.js.Zone.scheduleTask	@	zone.js:238
	push../node_modules/zone.js/dist/zone.js.Zone.scheduleMicroTask	@	zone.js:258
	scheduleResolveOrReject	@	zone.js:879
	ZoneAwarePromise.then	@	zone.js:1012
	push../node_modules/@angular/core/fesm5/core.js.PlatformRef.bootstrapModule	@	core.js:17803
	./src/main.ts	@	main.ts:11
	__webpack_require__	@	bootstrap:78
	0	@	main.ts:12
	__webpack_require__	@	bootstrap:78
	checkDeferredModules	@	bootstrap:45
	webpackJsonpCallback	@	bootstrap:32
	(anonymous)