react native bug

index.ios.js

import React, { AppRegistry, View, Text } from 'react-native';

const AppContainer = () => {
  console.warn('Rendering component');
  console.log('simple log');

  return (
    <View>
      <Text>
        Hello world
      </Text>
    </View>
  );
}

AppRegistry.registerComponent('mobile', () => AppContainer);