message: Accessed crumb from data
diff: @@ -96,7 +96,7 @@ class NavigationStack extends React.Component<NavigationStackProps, NavigationSt
  onDidNavigateBack={this.onDidNavigateBack}>
  {nextCrumb &&
  <Ghost data={scenes} getKey={({crumb}) => keys[crumb]}>
  - {({key, crumb}) => (
  + {({key, data: {crumb}}) => (
  <Scene
  key={key}
  crumb={crumb}
  