<s>[INST] package com.ywb.game;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;

public class MainActivity extends Activity {
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        button = findViewById(R.id.button);

        Button b = findViewById(R.id.button);

        b.setBackgroundResource(R.drawable.arrow);

        button.setBackgroundResource(R.drawable.arrow);

        b.setBackgroundResource(R.drawable.arrow);

        super.finish();
    }
}

There is a bug in this Android code snippet. Can you identify it?[/INST]