Uncaught Error When i try to use pre defined methods for Killed State

[vikas-finity]

Hi

I am facing an issue in my production Environment Below is the line am facing crash
CleverTapPlugin.onKilledStateNotificationClicked(_onInAppNotificationButtonClicked);

and below is the screenshot from the logs

I/flutter (21670): ----------------FIREBASE CRASHLYTICS----------------
I/flutter (21670): Null check operator used on a null value
[sentry.platformError] [error] Uncaught Platform Error
I/flutter (21670): #0 CleverTapPlugin._registerKilledStateNotificationClickedHandler (package:clevertap_plugin/clevertap_plugin.dart:366:53)
I/flutter (21670): #1 CleverTapPlugin.onKilledStateNotificationClicked (package:clevertap_plugin/clevertap_plugin.dart:350:5)
I/flutter (21670): #2 CleverTapInAppHandler.Eval ()
I/flutter (21670): #3 CleverTapInAppHandler._initializeCleverTapInAppHandlers (package:neo_zap/utils/clevertap_messages_handler.dart:19:54)
I/flutter (21670): #4 new CleverTapInAppHandler (package:neo_zap/utils/clevertap_messages_handler.dart:12:5)
I/flutter (21670): #5 _MyAppState.initState (package:neo_zap/app.dart:29:7)
I/flutter (21670): #6 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5762:55)
I/flutter (21670): #7 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5607:5)
I/flutter (21670): #8 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
I/flutter (21670): #9 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
I/flutter (21670): #10 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5656:16)
I/flutter (21670): #11 Element.rebuild (package:
I/flutter (21670): ----------------------------------------------------
Null check operator used on a null value
#0 CleverTapPlugin._registerKilledStateNotificationClickedHandler (package:clevertap_plugin/clevertap_plugin.dart:366:53)
#1 CleverTapPlugin.onKilledStateNotificationClicked (package:clevertap_plugin/clevertap_plugin.dart:350:5)
#2 CleverTapInAppHandler.Eval ()
#3 CleverTapInAppHandler._initializeCleverTapInAppHandlers (package:neo_zap/utils/clevertap_messages_handler.dart:19:54)
#4 new CleverTapInAppHandler (package:neo_zap/utils/clevertap_messages_handler.dart:12:5)
#5 _MyAppState.initState (package:neo_zap/app.dart:29:7)
#6 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5762:55)
#7 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5607:5)
#8 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
#9 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
#10 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5656:16)
#11 Element.rebuild (package:flutter/src/widgets/framework.dart:5347:7)
#12 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5613:5)
#13 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5607:5)
#14 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
#15 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
#16 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5656:16)
#17 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5794:11)
#18 Element.rebuild (package:flutter/src/widgets/framework.dart:5347:7)
#19 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5613:5)
#20 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5785:11)
#21 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5607:5)
#22 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
#23 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
#24 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5656:16)
#25 Element.rebuild (package:flutter/src/widgets/framework.dart:5347:7)
#26 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5613:5)
#27 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5607:5)
#28 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
#29 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
#30 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5656:16)
#31 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5794:11)
#32 Element.rebuild (package:flutter/src/widgets/framework.dart:5347:7)
#33 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5613:5)
#34 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5785:11)
#35 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5607:5)
#36 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
#37 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
#38 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5656:16)
#39 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5794:11)
#40 Element.rebuild (package:flutter/src/widgets/framework.dart:5347:7)
#41 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5613:5)
#42 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5785:11)
#43 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5607:5)
#44 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
#45 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
#46 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5656:16)
#47 Element.rebuild (package:flutter/src/widgets/framework.dart:5347:7)
#48 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5613:5)
#49 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5607:5)
#50 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
#51 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
#52 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5656:16)
#53 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5794:11)
#54 Element.rebuild (package:flutter/src/widgets/framework.dart:5347:7)
#55 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5613:5)
#56 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5785:11)
#57 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5607:5)
#58 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
#59 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
#60 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5656:16)
#61 Element.rebuild (package:flutter/src/widgets/framework.dart:5347:7)
#62 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5613:5)
#63 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5607:5)
#64 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
#65 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
#66 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5656:16)
#67 Element.rebuild (package:flutter/src/widgets/framework.dart:5347:7)
#68 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5613:5)
#69 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5607:5)
#70 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
#71 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
#72 _RawViewElement._updateChild (package:flutter/src/widgets/view.dart:465:16)
#73 _RawViewElement.mount (package:flutter/src/widgets/view.dart:488:5)
#74 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
#75 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
#76 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5656:16)
#77 Element.rebuild (package:flutter/src/widgets/framework.dart:5347:7)
#78 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5613:5)
#79 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5607:5)
#80 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
#81 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
#82 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5656:16)
#83 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5794:11)
#84 Element.rebuild (package:flutter/src/widgets/framework.dart:5347:7)
#85 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5613:5)
#86 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5785:11)
#87 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5607:5)
#88 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4480:16)
#89 Element.updateChild (package:flutter/src/widgets/framework.dart:3963:18)
#90 RootElement._rebuild (package:flutter/src/widgets/binding.dart:1636:16)
#91 RootElement.mount (package:flutter/src/widgets/binding.dart:1605:5)
#92 RootWidget.attach. (package:flutter/src/widgets/binding.dart:1558:18)
#93 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3038:19)
#94 RootWidget.attach (package:flutter/src/widgets/binding.dart:1557:13)
#95 WidgetsBinding.attachToBuildOwner (package:flutter/src/widgets/binding.dart:1296:27)
#96 WidgetsBinding.attachRootWidget (package:flutter/src/widgets/binding.dart:1278:5)
#97 WidgetsBinding.scheduleAttachRootWidget. (package:flutter/src/widgets/binding.dart:1264:7)
#98 Timer._createTimer. (dart:async-patch/timer_patch.dart:18:15)
#99 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:398:19)
#100 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:429:5)
#101 _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:184:12)

and below is the screenshot of the error from the logs

[Anush-Shand]

@vikas-finity Could you share some details around the integration? Specifically around this line CleverTapPlugin.onKilledStateNotificationClicked(_onInAppNotificationButtonClicked);

1. Please share the definition for this function _onInAppNotificationButtonClicked. Also is it a top level or a static function?
2. CleverTapPlugin.onKilledStateNotificationClicked() is for push notifications only but the name of the handler suggests it is being used for inapps?
3. What version of the clevertap-flutter is being used?

I was able to reproduce this error with the exact same logs if my handler was not a top level function.

[vikas-finity]

Hi thanks for contacting Am using this function when app is in killed state and after clicking on push. Notifications it will wake up my app and some values stores in this method (_inAppButtonCliked) and after that i performed my action 1. Detail i shared above and its a static function 2. Method name is wrong but its not doing anything its just save data in local.variable 3. I used 3.0.0

…

________________________________ From: Anush-Shand ***@***.***> Sent: Thursday, April 10, 2025 2:01:51 PM To: CleverTap/clevertap-flutter ***@***.***> Cc: Vikas Sharma ***@***.***>; Mention ***@***.***> Subject: Re: [CleverTap/clevertap-flutter] Uncaught Error When i try to use pre defined methods for Killed State (Issue #305) @vikas-finity<https://github.com/vikas-finity> Could you share some details around the integration? Specifically around this line CleverTapPlugin.onKilledStateNotificationClicked(_onInAppNotificationButtonClicked); 1. Please share the definition for this function _onInAppNotificationButtonClicked. Also is it a top level or a static function? 2. CleverTapPlugin.onKilledStateNotificationClicked() is for push notifications only but the name of the handler suggests it is being used for inapps? 3. What version of the clevertap-flutter is being used? I was able to reproduce this error with the exact same logs if my handler was not a top level function. — Reply to this email directly, view it on GitHub<#305 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BMAQSKLKPZY5HKJPRYJ6NIL2YYT7PAVCNFSM6AAAAAB222UWZ6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDOOJRHE3TSMRTGY>. You are receiving this because you were mentioned.Message ID: ***@***.***> [https://avatars.githubusercontent.com/u/127097095?s=20&v=4]Anush-Shand left a comment (CleverTap/clevertap-flutter#305)<#305 (comment)> @vikas-finity<https://github.com/vikas-finity> Could you share some details around the integration? Specifically around this line CleverTapPlugin.onKilledStateNotificationClicked(_onInAppNotificationButtonClicked); 1. Please share the definition for this function _onInAppNotificationButtonClicked. Also is it a top level or a static function? 2. CleverTapPlugin.onKilledStateNotificationClicked() is for push notifications only but the name of the handler suggests it is being used for inapps? 3. What version of the clevertap-flutter is being used? I was able to reproduce this error with the exact same logs if my handler was not a top level function. — Reply to this email directly, view it on GitHub<#305 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BMAQSKLKPZY5HKJPRYJ6NIL2YYT7PAVCNFSM6AAAAAB222UWZ6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDOOJRHE3TSMRTGY>. You are receiving this because you were mentioned.Message ID: ***@***.***> [Company Logo] Vikas Sharma SDE 3 - Mobile App Developer |Engineering | [https://resources.neo-group.in/icons_signature/contact.png] 9215980008 | <Tel:9215980008> [https://resources.neo-group.in/icons_signature/website.png] neo-group.in <https://www.neo-group.in/> | Follow us on: [https://resources.neo-group.in/icons_signature/linkedin.png] <https://www.linkedin.com/company/neo-group9/> [https://resources.neo-group.in/icons_signature/youtube.png] ***@***.***>

________________________________ [https://resources.neo-group.in/icons_signature/address.png] , Gurgaon 122005 ***@***.***,72.8312839,15z/data=!4m6!3m5!1s0x3be7cef3836311c1:0x8cfa9225e0aa9bca!8m2!3d18.994995!4d72.831238!16s%2Fm%2F0dsbbwr?entry=ttu>

[Anush-Shand]

@vikas-finity
Please make sure you have considered this

  /// Set a message handler function which is called when the app is in the
  /// terminated or killed state.
  ///
  /// This provided handler must be a top-level function and cannot be
  /// anonymous otherwise an [ArgumentError] will be thrown.
  static void onKilledStateNotificationClicked(
      CleverTapOnKilledStateNotificationClickedHandler handler) {
    _registerKilledStateNotificationClickedHandler(handler);
  }

I cannot see the implementation of _onInAppNotificationButtonClicked in this ticket. Can you share a basic reproducer?

[Anush-Shand]

@vikas-finity
Closing this due to inactivity. Feel free to reopen if required