Lazy loaded module in named outlet throws error #12842

[x] bug report
[ ] feature request
[ ] support request

Current behavior
Navigating to route with lazy loaded module in named outlet throws error:

Uncaught (in promise): TypeError: Cannot read property 'routes' of undefined

Expected behavior
Navigating to route with lazy loaded module in named outlet without errors.

Minimal reproduction of the problem with instructions
When I have configured my routes with named outlet and want to have lazy loaded module in that outlet.

export const routes: Routes = [
 {  
   path: '',
   component: AppComponent,
   children: [
     {
       path: '',
       loadChildren: "app/home/home.module#HomeModule"
     },   {
       path: '',
       loadChildren: "app/about/about.module#AboutModule",
       outlet: "about"
     }
   ]
  }
];

Here is the plnkr to demonstrate the behavior: http://plnkr.co/edit/nK9kJYdakXILZU0UKFrP?p=preview
(Anything is displayed because of error)

What is the motivation / use case for changing the behavior?
Using lazy loaded modules in named outlets.

Please tell us about your environment:

Angular version: 2.0.X

Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView ]

Language: [all | TypeScript X.X | ES6/7 | ES5]

Node (for AoT issues): node --version =