Crash Observed when AxisRenderer interval is becoming NaN

[ghost]

I have a chart graph and based upon Segment Controller, We change the value of graph. When the axis graphs values are changed and segment is changed, the zoom level remains the same as it was earlier zoomed to. The following line is crashing in AxisRendererBase.swift since variable are becoming NaN.
let intervalSigDigit = Int(interval / intervalMagnitude)
My Chart Release shows following in Lock file

• Charts (3.0.1):
  • Charts/Core (= 3.0.1)

[ghost]

This is one of the lldb log: fatal error: Double value cannot be converted to Int because it is either infinite or NaN

[liuxuan30]

need more info why some of the values become NaN or inf.

[ghost]

Not sure. I am just using the API and it was crashing on this If in near future I get to reproduce I will surely paste the info. As of now I would like someone to fix it for invalid values. Any help would be appreciated.

[liuxuan30]

yep but we need more info on how this happens

[capecrawler]

Also getting few crashes from fabric that is somehow related to this.

[liuxuan30]

are you having same issue as in #2356?

[capecrawler]

I am not sure since I was not able to replicate this crash and it points to different line of code which is let intervalSigDigit = Int(interval / intervalMagnitude). My guess is that intervalMagnitude value is 0.0 or NaN that is causing the crash.

[liuxuan30]

that's weird, I need to know when

let intervalMagnitude = ChartUtils.roundToNextSignificant(number: pow(10.0, Double(Int(log10(interval)))))

will make intervalMagnitude zero. I don't see obvious number will do so.

[josman185]

Hello @liuxuan30 , @danielgindi
I'm getting an error in line 125: fatal error: Double value cannot be converted to Int because it is either infinite or NaN

this is the line: let intervalMagnitude = ChartUtils.roundToNextSignificant(number: pow(10.0, Double(Int(log10(interval)))))

please if you have any suggestions I'll be very thankful.

here you have more data:

[liuxuan30]

Can you check if #2377 fix the issue? It has been sometime and I don't remember if they are the same.

[atalayasa]

@josman185hotm did you solve your issue ?

[liuxuan30]

closing now. reopen with updates

[jessicamecht]

The same thing happened for me when dismissing a viewController and returning to the view that included the chart in

let intervalMagnitude = pow(10.0, Double(Int(log10(interval)))).roundedToNextSignficant()

Edit:
I dug a little deeper into the problem, and it seems that it only appears when I set setVisibleXRangeMaximum in the viewDidLoad (I changed it to be called in the viewWillAppear and it did not crash any more).

It seems that the Transformers valueToPixelMatrix is producing the nan value but right now I do not know where I might be missing setting this, since all my Charts logic is in one place and in all the other cases do not crash (when presenting the vc).

[ivan-pavliuk]

Hello. The same crash!

STR:

1. Zoom in the chart
2. Change count lines in the chart (update LineChartView.data value with new points)

[ivan-pavliuk]

The solution for me:
set self.chartView.zoom(scaleX: 0, scaleY: 0, x: 0, y: 0) when updating the chart

[laurenyew-ua]

Hitting this crash as well.
let intervalMagnitude = pow(10.0, Double(Int(log10(interval)))).roundedToNextSignficant()
let intervalSigDigit = Int(interval / intervalMagnitude)
is crashing. intervalMagnitude is coming back as NaN.

[ciumexan]

same here... i think is related to the interval value not getting the default (minimal) init.
So the "interval" is nil.