title: Unexpected value 'DecoratorFactory' imported by the module 'TempModule'
body: <p>In my sample application I have written a feature module "TempModule" and
  below is the code.</p>
  
  <pre><code>import { NgModule } from '@angular/core';
  import { CommonModule} from '@angular/common';
  
  import { TempOneComponent } from './temp.one.component';
  import { TempTwoComponent } from './temp.two.component';
  import { tempRouting } from './temp.routing';
  
  
  
  @NgModule({
  declarations: [ TempOneComponent,
                  TempTwoComponent],
  imports: [ NgModule,
             CommonModule,
             tempRouting]
  })
  
  export class TempModule {}
  </code></pre>
  
  <p>I am referring to the TempModule in root module , below is the root module code</p>
  
  <pre><code>import { NgModule }       from '@angular/core';
  import { BrowserModule  } from '@angular/platform-browser';
  import { FormsModule } from '@angular/forms';
  
  //-- routing import
  import { routing,
           appRoutingProviders} from './app.routing'; 
  
  //-- root component import
  import { AppComponent } from './app.component';
  import { AppAboutComponent } from './app-about.component';
  import { AppCreatTicketComponent } from './tickets/    app.create-ticket.component';
  import { AppOpenTicketComponent } from './tickets/app.open-ticket.component';
  import { AppSearchTicketComponent } from './tickets/    app.search-ticket.component';
  import { AppDashboardComponent } from './tickets/app.dashboard.component';
  import { AppUsersComponent } from './users/app.users.component';
  
  import { TempModule } from './tempModule/temp.module';
  
  @NgModule({
      declarations: [AppComponent , 
      AppAboutComponent , 
      AppCreatTicketComponent,
      AppOpenTicketComponent,
      AppSearchTicketComponent,
      AppDashboardComponent,
      AppUsersComponent
      ],
      imports:       [BrowserModule ,
                      FormsModule ,
                      routing,
                      TempModule ],
      providers: [appRoutingProviders],
      bootstrap:    [AppComponent]
  
  })
  
  export class AppModule {}
  </code></pre>
  
  <p>When I run the application , "Unexpected value 'DecoratorFactory' imported by the module 'TempModule'" is displayed in browser console.</p>
  
  <p>Any idea what could be the reason for this error ?</p>