a-cascader用 v-decorator 清空内容按键不生效，报错

[Khan-KK]

[close-issue-app]

Your issue has been closed because it does not conform to our issue requirements. Please use the Issue Helper to create an issue, thank you!

为了能够进行高效沟通，我们对 issue 有一定的格式要求，你的 issue 因为不符合要求而被自动关闭。你可以通过 issue 助手 来创建 issue 以方便我们定位错误。谢谢配合！

[Khan-KK]

因为结果为null的原因，把返回结果做判空判断解决问题。

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.