Plotly 1.42.1 goes unresponsive

[rfriedma]

I recently updated from plotly 1.41 to 1.42.1 in order to get some bug fixes. With the same data, plotting is now going unresponsive. I have two links below showing the same data in two versions of plotly where one hangs.
I'm using Chrome 70.0.3538.67 (Official Build) (64-bit)

Here's 1.42.1:
https://codepen.io/rfried/pen/VEJOJL

Here's 1.41.0:
https://codepen.io/rfried/pen/dgBxEg

Can anyone determine something wrong with my data or explain why plotly is hanging?

Thanks

[etpinard]

Thanks very much for writing in.

Unfortunately, nothing comes to mind at first glance. We'll investigate.

[alexcjohnson]

there's a runaway while loop here:

plotly.js/src/traces/scattergl/index.js

Lines 401 to 407 in 6fda595

	while(isNaN(srcPos[firstptdef]) || isNaN(srcPos[firstptdef + 1])) {
	firstptdef += 2;
	}
	var lastptdef = srcPos.length - 2;
	while(isNaN(srcPos[lastptdef]) || isNaN(srcPos[lastptdef + 1])) {
	lastptdef += -2;
	}

Came in with #3087
@archmoj want to take this?

[etpinard]

@archmoj I'm on it. I'll have a PR out shortly.

[rfriedma]

Thanks for the quick response and fix :)

[etpinard]

@rfriedma thank you for the report!