Replacing entire data object by cloned one, causes error.

Same setup as https://github.com/chartjs/Chart.js/issues/3614 but instead of replacing data object for new one, I am replacing for deep cloned one, and it causes error.

      var clonedData = _.cloneDeep(myLine.config.data);
      myLine.config.data.datasets = clonedData.datasets;
      myLine.update();

causes error:

Chart.min.js:12 Uncaught TypeError: Cannot read property 'datasets' of undefined
    at a.getDataset (Chart.min.js:12)
    at a.buildOrUpdateElements (Chart.min.js:12)
    at t.Controller.<anonymous> (Chart.min.js:11)
    at Object.o.each (Chart.min.js:12)
    at t.Controller.update (Chart.min.js:11)
    at HTMLButtonElement.<anonymous> ((index):184)

Here it is reproduced in fiddle https://jsfiddle.net/935heqas/, just RUN the code and click on the “REPLACE ENTIRE DATA OBJECT” button.

It seems to be some reference mismatch problem inside chartjs.

Many thanks for any help.

[alex2wong]

I suppose you can try a feature request to the core maintainer, to make chart.data props immutable. @benmccann

[etimberg]

This appears to work fine in v3.0.0-beta.11 https://jsfiddle.net/ecw1q2of/