柱状图的markArea属性通过x和y设置标记区域报错

[xiaobao66]

One-line summary [问题简述]

当在柱状图通过markArea属性设置绘制区域时，如果通过x和y属性设置绘制面积，程序会报错，提示Cannot read property '0' of undefined
at markAreaTransform (MarkAreaView.js:23)

Version & Environment [版本及环境]

• ECharts version [ECharts 版本]: 3.8.5
• Browser version [浏览器类型和版本]:
• OS Version [操作系统类型和版本]:

Expected behaviour [期望结果]

能够通过x和y属性绘制标记区域

ECharts option [ECharts配置项]

option = {
    title: {
        show: true,
        text: 'echarts demo'
    },
    legend: {
        show: true,
        formatter: function(item) {
            return `${item}`
        },
        data: [{
            name: '访问量'
        }]
    },
    grid: {
        show: true
    },
    xAxis: {
        type: 'category',
        boundaryGap: true,
        data: ['周一', '周二', '周三', '周四', '周五', '周六', '周日']
    },
    yAxis: {
        type: 'value',
        axisLabel: {
            formatter: '{value}'
        }
    },
    tooltip: {
        show: true,
        trigger: 'axis'
    },
    toolbox: {
        show: true,
        feature: {
            saveAsImage: {}
        }
    },
    series: [{
        name: '访问量',
        type: 'bar',
        data: [10, 52, 200, 334, 390, 330, 220],
        markArea: {
            label: {
                normal: {
                    show: true
                }
            },
            data: [
                [{
                    name: 'set a area',
                    x: 50,
                    y: 100
                }, {
                    x: 80,
                    y: 200
                }]
            ]
        }
    }]
}

Other comments [其他信息]

https://jsfiddle.net/xiaobao/97nm56yg/
可以查看控制台，上面有报错信息

[marcong95]

遇到同类问题，关注。。。

[ctc1995]

有进一步解决方案吗？

[github-actions]

This issue has been automatically marked as stale because it did not have recent activity. It will be closed in 7 days if no further activity occurs. If you wish not to mark it as stale, please leave a comment in this issue.

[github-actions]

This issue has been automatically closed because it did not have recent activity. If this remains to be a problem with the latest version of Apache ECharts, please open a new issue and link this to it. Thanks!