vc-table里面的EXPAND_COLUMN用indexOf和includes判断导致出问题

[lllianreg]

- [ ] I have searched the issues of this repository and believe that this is not a duplicate.

Version

undefined

Environment

all env

Reproduction link

http://www.baidu.com

Steps to reproduce

const columns = ref([{title: '序号', dataIndex: 'key', key: 'key', align: 'center'}, {}])

What is expected?

箭头在第二列

What is actually happening?

源码es\vc-table\hooks\useColumns.js
107行 if (!cloneColumns.includes(EXPAND_COLUMN)) {
117行 const expandColumnIndex = cloneColumns.indexOf(EXPAND_COLUMN);
实际上EXPAND_COLUMN指向一个空对象 并不能用includes or indexOf判断 只能使用expandIconColumnIndex 但是这里会导致使用expandIconColumnIndex一直预警