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Null check operator used on a null _rawKeyboard.lookUpLayout(physicalKey)! #88236

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Null check operator used on a null _rawKeyboard.lookUpLayout(physicalKey)!#88236
Labels
a: null-safetySupport for Dart's null safety featurea: productionIssues experienced in live production appsa: text inputEntering text in a text field or keyboard related problemsc: regressionIt was better in the past than it is nowframeworkflutter/packages/flutter repository. See also f: labels.platform-androidAndroid applications specificallyr: fixedIssue is closed as already fixed in a newer version
@narumi147

Description

@narumi147
narumi147
opened on Aug 15, 2021

Sorry I cannot reproduce it, it is collected from a small amount of app users' crash feedback. All are android devices.

Error:
Null check operator used on a null value
Stack trace:
#0 KeyEventManager._convertRawEventAndStore (package:flutter/src/services/hardware_keyboard.dart:892)
#1 RawKeyboard.handleRawKeyEvent (package:flutter/src/services/raw_keyboard.dart:677)
#2 KeyEventManager.handleRawKeyMessage (package:flutter/src/services/hardware_keyboard.dart:818)
#3 BasicMessageChannel.setMessageHandler.<anonymous closure> (package:flutter/src/services/platform_channel.dart:73)
#4 BasicMessageChannel.setMessageHandler.<anonymous closure> (package:flutter/src/services/platform_channel.dart:72)
#5 _DefaultBinaryMessenger.setMessageHandler.<anonymous closure> (package:flutter/src/services/binding.dart:379)
#6 _DefaultBinaryMessenger.setMessageHandler.<anonymous closure> (package:flutter/src/services/binding.dart:376)
#7 _invoke2.<anonymous closure> (dart:ui/hooks.dart:205)
#8 _rootRun (dart:async/zone.dart:1428)
#9 _CustomZone.run (dart:async/zone.dart:1328)
#10 _CustomZone.runGuarded (dart:async/zone.dart:1236)
#11 _invoke2 (dart:ui/hooks.dart:204)
#12 _ChannelCallbackRecord.invoke (dart:ui/channel_buffers.dart:42)
#13 _Channel.push (dart:ui/channel_buffers.dart:132)
#14 ChannelBuffers.push (dart:ui/channel_buffers.dart:329)
#15 PlatformDispatcher._dispatchPlatformMessage (dart:ui/platform_dispatcher.dart:544)
#16 _dispatchPlatformMessage (dart:ui/hooks.dart:92)

flutter/packages/flutter/lib/src/services/hardware_keyboard.dart

Lines 889 to 896 in 338ade8

for (final PhysicalKeyboardKey key in _rawKeyboard.physicalKeysPressed.difference(physicalKeysPressed)) {
_keyEventsSinceLastMessage.add(KeyDownEvent(
physicalKey: key,
logicalKey: _rawKeyboard.lookUpLayout(physicalKey)!,
timeStamp: timeStamp,
synthesized: true,
));
}

Built using Flutter (Channel beta, 2.5.0-5.1.pre, on Microsoft Windows [Version 10.0.19043.1110], locale zh-CN)

flutter doctor -v 
[✓] Flutter (Channel beta, 2.5.0-5.1.pre, on Microsoft Windows [Version 10.0.19043.1110], locale zh-CN)
    • Flutter version 2.5.0-5.1.pre at D:\Projects\sdk\flutter
    • Upstream repository https://mirrors.tuna.tsinghua.edu.cn/git/flutter-sdk.git
    • Framework revision 65cf7de5f4 (3 days ago), 2021-08-11 15:48:01 -0700
    • Engine revision fbeb7e22bd
    • Dart version 2.14.0 (build 2.14.0-377.4.beta)
    • Pub download mirror https://pub.flutter-io.cn
    • Flutter download mirror https://storage.flutter-io.cn

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at D:\Projects\sdk\Android\Sdk
    • Platform android-30, build-tools 30.0.3
    • ANDROID_HOME = D:\Projects\sdk\Android\Sdk
    • Java binary at: C:\Users\narumi\AppData\Local\JetBrains\Toolbox\apps\AndroidStudio\ch-1\202.7486908\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6842174)
    • All Android licenses accepted.

[✗] Chrome - develop for the web (Cannot find Chrome executable at .\Google\Chrome\Application\chrome.exe)
    ! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.

[✓] Visual Studio - develop for Windows (Visual Studio Enterprise 2019 16.8.3)
    • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise
    • Visual Studio Enterprise 2019 version 16.8.30804.86
    • Windows 10 SDK version 10.0.18362.0

[✓] Android Studio (version 4.2)
    • Android Studio at C:\Users\narumi\AppData\Local\JetBrains\Toolbox\apps\AndroidStudio\ch-1\202.7486908
    • Flutter plugin version 59.0.1
    • Dart plugin version 202.8531
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6842174)

[✓] VS Code (version 1.57.1)
    • VS Code at C:\Users\narumi\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.24.0

[✓] Connected device (2 available)
    • Windows (desktop) • windows • windows-x64    • Microsoft Windows [Version 10.0.19043.1110]
    • Edge (web)        • edge    • web-javascript • Microsoft Edge 92.0.902.62

! Doctor found issues in 1 category.

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    a: null-safetySupport for Dart's null safety featurea: productionIssues experienced in live production appsa: text inputEntering text in a text field or keyboard related problemsc: regressionIt was better in the past than it is nowframeworkflutter/packages/flutter repository. See also f: labels.platform-androidAndroid applications specificallyr: fixedIssue is closed as already fixed in a newer version

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