🐛 [FIREBASE_MESSAGING] java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.Class.isInterface()' on a null object reference

[bun-lau]

Bug report

When sending cloud messaging to the device and the device is running "FirebaseMessaging.onBackgroundMessage", the app will crash unexpectedly.

Device used: Pixel 6

Steps to reproduce

1. Configure the app to use Firebase with the FlutterFire CLI: flutterfire configure
2. install the app to a real device by running: flutter run
3. Put app on background / switch to another app
4. Send test message from Firebase Console
5. send several messages to the device, will result "app has stopped"

Expected behavior

App shall not be closed/crashed

Sample project

Issue can be reproduced by using the office example

Flutter doctor

flutter doctor -v

[✓] Flutter (Channel stable, 3.7.12, on macOS 13.4.1 22F82 darwin-arm64, locale en-AU)
    • Flutter version 3.7.12 on channel stable at /Users/xxx/env/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 4d9e56e694 (10 weeks ago), 2023-04-17 21:47:46 -0400
    • Engine revision 1a65d409c7
    • Dart version 2.19.6
    • DevTools version 2.20.1

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
    • Android SDK at /Users/xxx/Library/Android/sdk
    • Platform android-33, build-tools 33.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 14.3.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 14E300c
    • CocoaPods version 1.12.1

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

[✓] Android Studio (version 2021.3)
    • 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 11.0.13+0-b1751.21-8125866)

[✓] VS Code (version 1.79.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.66.0

[✓] VS Code (version 1.80.0-insider)
    • VS Code at /Applications/Visual Studio Code - Insiders.app/Contents
    • Flutter extension version 3.66.0

[✓] Connected device (3 available)
    • HUAWEI RIO L02 (mobile) • C4JDU16419000352 • android-arm64  • Android 5.1 (API 22)
    • macOS (desktop)         • macos            • darwin-arm64   • macOS 13.4.1 22F82 darwin-arm64
    • Chrome (web)            • chrome           • web-javascript • Google Chrome 114.0.5735.133

[✓] HTTP Host Availability
    • All required HTTP hosts are available

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[russellwheatley]

Fixed with this PR: #11163. Release should be out in the next couple of days. Thanks for your patience 🙏