java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.ViewGroup.removeView(android.view.View)' on a null object reference

[toda-bps]

• I have read the README
• I have already searched for the same problem
• I have read and done the setup for Android: IMPORTANT Note for Android and iOS and IMPORTANT Note for Android
• I have read and done the setup for iOS: IMPORTANT Note for Android and iOS and IMPORTANT Note for iOS
• I have ran the sample app and it does not work there

Environment

Technology	Version
Flutter version	1.20.0-8.0.pre.41
Plugin version	4.0.0+4
Android version	9.1.0.325
iOS version
Xcode version

Device information:

SHT-W09

Description

Expected behavior:

App does not crash.

Current behavior:

Crash with 'void android.view.ViewGroup.removeView(android.view.View)' on a null object reference.

Steps to reproduce

1. Repeatedly open and close InAppBrowser.
2. Sometimes my app crashes.

Stacktrace/Logcat

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.myapp, PID: 27791
    java.lang.RuntimeException: Unable to destroy activity {com.example.myapp/com.pichillilorenzo.flutter_inappwebview.InAppBrowser.InAppBrowserActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.ViewGroup.removeView(android.view.View)' on a null object reference
        at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:5176)
        at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:5195)
        at android.app.servertransaction.DestroyActivityItem.execute(DestroyActivityItem.java:39)
        at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:145)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:70)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2199)
        at android.os.Handler.dispatchMessage(Handler.java:112)
        at android.os.Looper.loop(Looper.java:216)
        at android.app.ActivityThread.main(ActivityThread.java:7625)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987)
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.ViewGroup.removeView(android.view.View)' on a null object reference
        at com.pichillilorenzo.flutter_inappwebview.InAppBrowser.InAppBrowserActivity.t(Unknown Source:34)
        at com.pichillilorenzo.flutter_inappwebview.InAppBrowser.InAppBrowserActivity.onDestroy(Unknown Source:0)
        at android.app.Activity.performDestroy(Activity.java:7737)
        at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1327)
        at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:5161)
        at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:5195) 
        at android.app.servertransaction.DestroyActivityItem.execute(DestroyActivityItem.java:39) 
        at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:145) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:70) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2199) 
        at android.os.Handler.dispatchMessage(Handler.java:112) 
        at android.os.Looper.loop(Looper.java:216) 
        at android.app.ActivityThread.main(ActivityThread.java:7625) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987) 

[samin-fs]

@pichillilorenzo I have the same issue, would you please help?

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug and a minimal reproduction of the issue.