🐛 [firebase_auth] NPE: io.flutter.plugins.firebase.auth.FlutterFirebaseAuthPlugin.removeEventListeners

[rohansohonee1]

Bug report

Describe the bug
NPE reported from firebase crashlytics.

Steps to reproduce

Unable to reproduce.

Expected behavior

Should not crash.

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Additional context

Stacktrace:

Caused by java.lang.NullPointerException: Attempt to invoke interface method 'void fe.d$d.h(java.lang.Object)' on a null object reference
       at io.flutter.plugins.firebase.auth.FlutterFirebaseAuthPlugin.removeEventListeners(FlutterFirebaseAuthPlugin.java)
       at io.flutter.plugins.firebase.auth.FlutterFirebaseAuthPlugin.onDetachedFromEngine(FlutterFirebaseAuthPlugin.java)
       at io.flutter.embedding.engine.FlutterEngineConnectionRegistry.remove(FlutterEngineConnectionRegistry.java)
       at io.flutter.embedding.engine.FlutterEngineConnectionRegistry.remove(FlutterEngineConnectionRegistry.java)
       at io.flutter.embedding.engine.FlutterEngineConnectionRegistry.removeAll(FlutterEngineConnectionRegistry.java)
       at io.flutter.embedding.engine.FlutterEngineConnectionRegistry.destroy(FlutterEngineConnectionRegistry.java)
       at io.flutter.embedding.engine.FlutterEngine.destroy(FlutterEngine.java)
       at io.flutter.embedding.android.FlutterActivityAndFragmentDelegate.onDetach(FlutterActivityAndFragmentDelegate.java)
       at io.flutter.embedding.android.FlutterActivity.onDestroy(FlutterActivity.java)
       at android.app.Activity.performDestroy(Activity.java:6442)
       at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1143)
       at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3877)
       at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3908)
       at android.app.ActivityThread.access$1500(ActivityThread.java:157)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1410)
       at android.os.Handler.dispatchMessage(Handler.java:102)
       at android.os.Looper.loop(Looper.java:148)
       at android.app.ActivityThread.main(ActivityThread.java:5551)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:731)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:621)

Device details:

Brand:LGE
Model:LG K8
Orientation: Portrait
RAM free: 240.06 MB
Disk free: 393.45 MB
Operating System
Version:Android 6.0
Orientation: Portrait
Rooted:No
Crash
Date:Dec 22, 2022, 6:52:46 AM

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Flutter doctor

Click To Expand

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.3.8, on macOS 12.6.2 21G320 darwin-x64, locale en-US)                                                                                                                                                   Checking Android licenses is taking an unexpectedly long time...[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 13.4.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2021.3)
[✓] VS Code (version 1.74.2)
[✓] Connected device (3 available)
[✓] HTTP Host Availability

• No issues found!

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Pubspec.yaml

firebase_core: 2.3.0
firebase_auth: 4.1.3

[darshankawar]

Since this seems to be coming from production and no concrete steps to replicate and code sample, I'll label this for team's attention and insights.
May be similar to: #9210

[darshankawar]

/cc @Lyokone

[Lyokone]

Hello I'm going to take a look at this.
You can get readable bug report by following those steps: https://firebase.google.com/docs/crashlytics/get-deobfuscated-reports?platform=flutter / https://firebase.google.com/docs/crashlytics/get-deobfuscated-reports?platform=android

[google-oss-bot]

Hey @rohansohonee1. We need more information to resolve this issue but there hasn't been an update in 7 weekdays. I'm marking the issue as stale and if there are no new updates in the next 7 days I will close it automatically.

If you have more information that will help us get to the bottom of this, just add a comment!

[rohansohonee1]

Caused by java.lang.NullPointerException: Attempt to invoke interface method 'void onCancel(java.lang.Object)' on a null object reference

flutterfire/packages/firebase_auth/firebase_auth/android/src/main/java/io/flutter/plugins/firebase/auth/FlutterFirebaseAuthPlugin.java

Line 1822 in ab39d09

streamHandler.onCancel(null);