导航到另一个片段时，片段中的RecyclerView崩溃

我一直在网上跟踪创建RecyclerView的示例。我唯一不同的是将RecyclerView放入Fragment中，而不是将其放入MainActivity中。RecyclerView可以很好地显示数据。但是，当我导航到另一个Fragment时，应用程序崩溃，并抛出与RecyclerView相关的异常：

java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.support.v7.widget.RecyclerView$ViewHolder.shouldIgnore()' on a null object reference

这是一个重现的最小示例：

主要活动：

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.main_layout)
    }
}

main_layout：

RecyclerFragment：

class RecyclerFragment : Fragment() {

    private val data = listOf("Moscow", "Washington")

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        setHasOptionsMenu(true)
        val view = inflater.inflate(R.layout.recycler_list, container, false)
        view.findViewById(R.id.list)?.apply {
            adapter = RecyclerAdapter(data)
        }
        return view
    }

    override fun onCreateOptionsMenu(menu: Menu?, menuInflater: MenuInflater) {
        menuInflater.inflate(R.menu.menu, menu)
    }

    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
        return when (item?.itemId) {
            R.id.navigate -> {
                fragmentManager?.beginTransaction()?.replace(R.id.fragment, HelloFragment())?.commit()
                true
            }
            else -> super.onOptionsItemSelected(item)
        }
    }
}

recycler_list：

RecyclerAdapter：

class RecyclerAdapter(private val data: List):
    RecyclerView.Adapter() {

    inner class ViewHolder(val view: CardView): RecyclerView.ViewHolder(view)

    override fun onCreateViewHolder(root: ViewGroup, viewType: Int): ViewHolder {
        val listItem = LayoutInflater.from(root.context)
            .inflate(R.layout.list_item, root, false) as CardView
        return ViewHolder(listItem)
    }

    override fun onBindViewHolder(viewHolder: ViewHolder, position: Int) {
        viewHolder.view.findViewById(R.id.text).text = data[position]
    }

    override fun getItemCount() = data.size
}

项目清单：

菜单：

HelloFragment：

class HelloFragment : Fragment() {

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.hello, container, false)
    }
}

你好：

此实现有问题吗？如何在片段中使用RecyclerView？