v2.0 Update issue for bar chart

[andi-b]

This almost works correctly - the initial loading of data is correct, but when I do the following with new data for barChartData :

window.myBar.data = barChartData;
window.myBar.update();

Only the chart itself updates with the correct data, but tooltip is incorrect. So I then did the following:

window.myBar.tooltip._data = barChartData;
window.myBar.update();

The label is now correct, but the value(yLabel) of the tooltip is still incorrect. It looks like it's the yLabel that is returning old data on line 2649 in Chart.js

return this._data.datasets[datasetIndex].label + ': ' + yLabel;

I may be going about this the wrong way, but from what I can tell this is the best and easiest method for me.

[etimberg]

The issue here is that internally the data object is attached to lots of places (scales, tooltip, etc). The solution is to simply store the reference to the data object in a single place.

[etimberg]

Fixed in #1646