The getter 'color' was called on null error (Tooltip buider)

[Luís]

Hi!

When I add the tooltip builder code, the tooltip apperars when I click on the series, but it gives an error on the console:

The following NoSuchMethodError was thrown during paint():

The getter 'color' was called on null. Receiver: null Tried calling: color

The relevant error-causing widget was

SfCircularChart

lib/…/charts/due_months_chart.dart:42

When the exception was thrown, this was the stack

#0 Object.noSuchMethod (dart:core-patch/object_patch.dart:51:5)

#1 _ArrowPainter.paint

package:syncfusion_flutter_charts/…/user_interaction/tooltip_template.dart:257

#2 RenderCustomPaint._paintWithPainter

package:flutter/…/rendering/custom_paint.dart:531

#3 RenderCustomPaint.paint

package:flutter/…/rendering/custom_paint.dart:572

#4 RenderObject._paintWithContext

package:flutter/…/rendering/object.dart:2311

...

The following RenderObject was being processed when the exception was fired: RenderCustomPaint#e2152 relayoutBoundary=up4

Attachment: due_months_chart_9cedad65.zip

[Sriram Kiran Senthilkumar]

Hi Luis, 

  

Greetings from Syncfusion. We have analyzed your scenario and we are able to replicate the reported issue at our end regarding the tooltip builder throws noSuchMethod exception when clicked on the series in circular charts. We will consider this as a bug and will include the fix for the reported issue in our upcoming weekly patch release which is expected to be rolled out by 3rd November 2020. We will update you once the release is rolled out and we appreciate your patience until then. 

  

Regards, 

Sriram Kiran