loadChildren doesn't work in webpack (rc5 ngmodule) #1679

Please provide us with the following information:

1. OS? Windows 7, 8 or 10. Linux (which distribution). Mac OSX (Yosemite? El Capitan?)
   linux/windows
2. Versions. Please run ng --version. If there's nothing outputted, please run
   in a Terminal: node --version and paste the result here:
   angular-cli: 1.0.0-beta.11-webpack.2
3. Repro steps. Was this an app that wasn't created using the CLI? What change did you
   do on your code? etc.

Defined a new module 'about', referenced it in a route:
{ path: 'about', loadChildren: 'app/+about/about.module' },

Build passes, during runtime, exception is thrown

1. The log given by the failure. Normally this include a stack trace and some
   more information.

EXCEPTION: Error: Uncaught (in promise): TypeError: Cannot read property 'import' of undefined
browser_adapter.js:84 EXCEPTION: Error: Uncaught (in promise): TypeError: Cannot read property 'import' of undefinedBrowserDomAdapter.logError @ browser_adapter.js:84BrowserDomAdapter.logGroup @ browser_adapter.js:94ExceptionHandler.call @ exception_handler.js:65next @ application_ref.js:348schedulerFn @ async.js:89SafeSubscriber.__tryOrUnsub @ Subscriber.js:225SafeSubscriber.next @ Subscriber.js:174Subscriber._next @ Subscriber.js:124Subscriber.next @ Subscriber.js:88Subject._finalNext @ Subject.js:128Subject._next @ Subject.js:120Subject.next @ Subject.js:77EventEmitter.emit @ async.js:77onError @ ng_zone.js:124onHandleError @ ng_zone_impl.js:74ZoneDelegate.handleError @ zone.js:327Zone.runGuarded @ zone.js:233_loop_1 @ zone.js:487drainMicroTaskQueue @ zone.js:494ZoneTask.invoke @ zone.js:426
browser_adapter.js:84 STACKTRACE:BrowserDomAdapter.logError @ browser_adapter.js:84ExceptionHandler.call @ exception_handler.js:67next @ application_ref.js:348schedulerFn @ async.js:89SafeSubscriber.__tryOrUnsub @ Subscriber.js:225SafeSubscriber.next @ Subscriber.js:174Subscriber._next @ Subscriber.js:124Subscriber.next @ Subscriber.js:88Subject._finalNext @ Subject.js:128Subject._next @ Subject.js:120Subject.next @ Subject.js:77EventEmitter.emit @ async.js:77onError @ ng_zone.js:124onHandleError @ ng_zone_impl.js:74ZoneDelegate.handleError @ zone.js:327Zone.runGuarded @ zone.js:233_loop_1 @ zone.js:487drainMicroTaskQueue @ zone.js:494ZoneTask.invoke @ zone.js:426
browser_adapter.js:84 Error: Uncaught (in promise): TypeError: Cannot read property 'import' of undefined
at resolvePromise (zone.js:538)
at zone.js:515
at ZoneDelegate.invoke (zone.js:323)
at Object.onInvoke (ng_zone_impl.js:53)
at ZoneDelegate.invoke (zone.js:322)
at Zone.run (zone.js:216)
at zone.js:571
at ZoneDelegate.invokeTask (zone.js:356)
at Object.onInvokeTask (ng_zone_impl.js:44)
at ZoneDelegate.invokeTask (zone.js:355)BrowserDomAdapter.logError @ browser_adapter.js:84ExceptionHandler.call @ exception_handler.js:68next @ application_ref.js:348schedulerFn @ async.js:89SafeSubscriber.__tryOrUnsub @ Subscriber.js:225SafeSubscriber.next @ Subscriber.js:174Subscriber._next @ Subscriber.js:124Subscriber.next @ Subscriber.js:88Subject._finalNext @ Subject.js:128Subject._next @ Subject.js:120Subject.next @ Subject.js:77EventEmitter.emit @ async.js:77onError @ ng_zone.js:124onHandleError @ ng_zone_impl.js:74ZoneDelegate.handleError @ zone.js:327Zone.runGuarded @ zone.js:233_loop_1 @ zone.js:487drainMicroTaskQueue @ zone.js:494ZoneTask.invoke @ zone.js:426
zone.js:461 Unhandled Promise rejection: Cannot read property 'import' of undefined ; Zone: angular ; Task: Promise.then ; Value: TypeError: Cannot read property 'import' of undefined(…)consoleError @ zone.js:461_loop_1 @ zone.js:490drainMicroTaskQueue @ zone.js:494ZoneTask.invoke @ zone.js:426
zone.js:463 Error: Uncaught (in promise): TypeError: Cannot read property 'import' of undefined(…)consoleError @ zone.js:463_loop_1 @ zone.js:490drainMicroTaskQueue @ zone.js:494ZoneTask.invoke @ zone.js:426

1. Mention any other details that might be useful.

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