BUG: TypeError: Cannot read property 'coord' of undefined

[eniaclyl]

Version

4.2.1

Reproduction link

https://gallery.echartsjs.com/editor.html?c=xx1QGUPT7I&v=1

Steps to reproduce

单击标注，控制台弹出TypeError: Cannot read property 'coord' of undefined

What is expected?

单击标注修改 标注文本

What is actually happening?

TypeError: Cannot read property 'coord' of undefined

---

如何正确的修改标注文本

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[yufeng04]

You may need to add coordinates. For example,

    markLine: {
                data: [[{
                    id: '1',
                    label: {
                        formatter: '1111111'
                    },
                    xAxis: -30,
                    yAxis: 30
                },
                {
                    xAxis: 50,
                    yAxis: 50
                }]]
            }