Problem with sunburst plot with total values

[archmoj]

This sunburst codepen does not show up and throws error in the console.
Also to mention - the treemap variation works fine on master.

[etpinard]

Nice catch. The same happens when generating an "implied root":

Plotly.newPlot(gd, { 
    data: [{
        type: 'sunburst',
        branchvalues: 'total',
        labels: [ 'A', 'B', 'b'],
        parents: ['Root', 'Root', 'B'],
        values: [1, 2, 1]
    }]
});

https://codepen.io/etpinard/pen/mddbBdy?editors=0010