<Mentions /> 结果集为空的时候，回车会报错, [Vue warn]: Error in v-on handler: "TypeError: Cannot read property 'value' of undefined"

[townmi]

Version

1.6.2以及低版本

Environment

• 5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/82.0.4083.0 Safari/537.36
• vue.version : 2.6.11

Reproduction link

https://antdv.com/components/mentions-cn/

Steps to reproduce

1. 在输入框输入@
2. 输入字符，直到结果空，显示暂无数据
3. 一直回车，一直报错
4. 报错产生的代码块

   ant-design-vue/components/vc-mentions/src/Mentions.jsx

   Line 192 in 5108f67

   const { value: mentionValue = '' } = option;

What is expected?

查找结果集为空，回车，应该不再显示暂无数据，select事件应该触发掉

What is actually happening?

一直回车，一直报错

[github-actions]

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