bootstrap(App, [....]).then((appRef: ComponentRef) is not called for production #451

export function main() {
  return browser.bootstrap(App, [
    ...APPLICATION_PROVIDERS,
    ngCore.provide(ngCore.PLATFORM_DIRECTIVES, {useValue: APPLICATION_DIRECTIVES, multi: true}),
    ngCore.provide(ngCore.PLATFORM_PIPES, {useValue: APPLICATION_PIPES, multi: true})
  ])
  .then((appRef: ngCore.ComponentRef) => {
      console.log('ABCDEF');
        // store a reference to the application injector
        appInjector(appRef.injector);
  })
  .catch(err => console.error(err));
}