Error in service hardware_keyboard.dart throws Null check operator used on a null value.

[ne3Vubeki]

In our application, for production, we caught an error in the service
hardware_keyboard.dart:

flutter 2.8

Null check operator used on a null value

#0  KeyEventManager._convertRawEventAndStore (package:flutter/src/services/hardware_keyboard.dart:902)\n
#1      RawKeyboard.handleRawKeyEvent (package:flutter/src/services/raw_keyboard.dart:678)\n
#2      KeyEventManager.handleRawKeyMessage (package:flutter/src/services/hardware_keyboard.dart:818)\n
#3      BasicMessageChannel.setMessageHandler.<anonymous closure> (package:flutter/src/services/platform_channel.dart:77)\n
#4      BasicMessageChannel.setMessageHandler.<anonymous closure> (package:flutter/src/services/platform_channel.dart:76)\n
#5      _DefaultBinaryMessenger.setMessageHandler.<anonymous closure> (package:flutter/src/services/binding.dart:389)\n
#6      _DefaultBinaryMessenger.setMessageHandler.<anonymous closure> (package:flutter/src/services/binding.dart:386)\n
#7      _invoke2.<anonymous closure> (dart:ui/hooks.dart:189)\n
#8      _rootRun (dart:async/zone.dart:1428)\n#9      _CustomZone.run (dart:async/zone.dart:1328)\n#10     _CustomZone.runGuarded (dart:async/zone.dart:1236)\n
#11     _invoke2 (dart:ui/hooks.dart:188)\n
#12     _ChannelCallbackRecord.invoke (dart:ui/channel_buffers.dart:42)\n
#13     _Channel.push (dart:ui/channel_buffers.dart:132)\n
#14     ChannelBuffers.push (dart:ui/channel_buffers.dart:329)\n
#15     PlatformDispatcher._dispatchPlatformMessage (dart:ui/platform_dispatcher.dart:544)\n
#16     _dispatchPlatformMessage (dart:ui/hooks.dart:83)

[etienn01]

Same issue appeared for me after upgrading from Flutter 2.5.2 to 2.8.1.

Null check operator used on a null value.
       at KeyEventManager._convertRawEventAndStore(KeyEventManager.java:902)
       at RawKeyboard.handleRawKeyEvent(RawKeyboard.java:678)
       at KeyEventManager.handleRawKeyMessage(KeyEventManager.java:818)
       at BasicMessageChannel.setMessageHandler.<fn>(setMessageHandler.java:77)
       at BasicMessageChannel.setMessageHandler.<fn>(setMessageHandler.java:76)
       at _DefaultBinaryMessenger.setMessageHandler.<fn>(setMessageHandler.java:389)
       at _DefaultBinaryMessenger.setMessageHandler.<fn>(setMessageHandler.java:386)

Edit:
Also on Flutter 2.5.2:

Null check operator used on a null value.
       at KeyEventManager._convertRawEventAndStore(KeyEventManager.java:884)
       at RawKeyboard.handleRawKeyEvent(RawKeyboard.java:677)
       at KeyEventManager.handleRawKeyMessage(KeyEventManager.java:818)
       at BasicMessageChannel.setMessageHandler.<fn>(setMessageHandler.java:73)
       at BasicMessageChannel.setMessageHandler.<fn>(setMessageHandler.java:72)
       at _DefaultBinaryMessenger.setMessageHandler.<fn>(setMessageHandler.java:379)
       at _DefaultBinaryMessenger.setMessageHandler.<fn>(setMessageHandler.java:376)

[maheshj01]

HI @ne3Vubeki, Thanks for filing the issue. Please share the output of flutter doctor -v and what platform were you targeting? Are there any known steps to reproduce the issue?

Thank you

[ne3Vubeki]

We have no replay capability. The error occurs in production and is handled by the firebase crashlytics logging.

flutter doctor -v

[✓] Flutter (Channel stable, 2.8.0, on macOS 12.0.1 21A559 darwin-x64, locale ru-RU)
    • Flutter version 2.8.0 at 
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision cf44000065 (13 дней назад), 2021-12-08 14:06:50 -0800
    • Engine revision 40a99c5951
    • Dart version 2.15.0

[!] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    • Android SDK at 
    ✗ cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/macos#android-setup for more details.

[✓] Xcode - develop for iOS and macOS (Xcode 13.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • CocoaPods version 1.10.0

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 4.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)

[✓] VS Code (version 1.63.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.29.0

[maheshj01]

Thanks for the info. Can you share what target platform was this issue reproduced on Android or IOS or both?

[ne3Vubeki]

Спасибо за информацию. Не могли бы вы рассказать, на какой целевой платформе эта проблема была воспроизведена на Android, IOS или на обоих устройствах?

Thanks for the info. Can you share what target platform was this issue reproduced on Android or IOS or both?

"model": "SCG02 SCG02", "platform": "Android 7.1.2(25)"
"model": "octopus_cheets octopus", "platform": "Android 9(28)"
"model": "dream2lteks SM-G955N", "platform": "Android 7.1.2(25)"