使用dataset 时数据视图异常echarts 配置项内容和展示

当数据以dataset形式设置时，工具箱的数据视图内显示为 NaN，这个是否为官方bug，是否有修复方案

      option = {
    legend: {},
    tooltip: {},
    toolbox:{
        feature:{
            dataView: {readOnly: false},
        }
    },
    dataset: {
        source: [
            ['product', '2015', '2016', '2017'],
            ['Matcha Latte', 43.3, 85.8, 93.7],
            ['Milk Tea', 83.1, 73.4, 55.1],
            ['Cheese Cocoa', 86.4, 65.2, 82.5],
            ['Walnut Brownie', 72.4, 53.9, 39.1]
        ]
    },
    xAxis: {type: 'category'},
    yAxis: {},
    // Declare several bar series, each will be mapped
    // to a column of dataset.source by default.
    series: [
        {type: 'bar'},
        {type: 'bar'},
        {type: 'bar'}
    ]
};