Crash (sometimes) when tapping on a text field (autofill related?) (NPE)

[cowcatfox]

Description

When you tap on the text field on some sites (like archive.is, brave search, many other sites), the browser can suddenly crash. This doesnt happen everytime, but it does happen often enough to be annoying.

Logcat:

FATAL EXCEPTION: main
Process: com.brave.browser, PID: 23514
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.autofill.AutofillId.setSessionId(int)' on a null object reference
    at android.os.Parcel.createExceptionOrNull(Parcel.java:2383)
    at android.os.Parcel.createException(Parcel.java:2361)
    at android.os.Parcel.readException(Parcel.java:2344)
    at android.os.Parcel.readException(Parcel.java:2286)
    at android.app.IActivityTaskManager$Stub$Proxy.reportAssistContextExtras(IActivityTaskManager.java:5434)
    at android.app.ActivityThread.handleRequestAssistContextExtras(ActivityThread.java:3925)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2171)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:236)
    at android.app.ActivityThread.main(ActivityThread.java:8097)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:620)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1011)
Caused by: android.os.RemoteException: Remote stack trace:
    at com.android.server.autofill.Session$AssistDataReceiverImpl.onHandleAssistData(Session.java:463)
    at com.android.server.wm.ActivityTaskManagerService.reportAssistContextExtras(ActivityTaskManagerService.java:3542)
    at android.app.IActivityTaskManager$Stub.onTransact(IActivityTaskManager.java:2506)
    at android.os.Binder.execTransactInternal(Binder.java:1154)
    at android.os.Binder.execTransact(Binder.java:1123)

Steps to reproduce

1. Open a site like archive.is in a new tab. Tap on any text field.
2. Probably won't crash immediately. Keep browsing the web in another tab, occasionally coming back to this tab to tap on a text field.
3. At some point tapping on the text field will cause it to crash. (On libgen.rs, I got this crash quite reliably after a minute or so.)

Actual result

Crash to launcher/home screen

Expected result

No crash

Reproduces how often

Intermittent issue

Brave version

1.69.164

Device

• Brand/model: Xiaomi Redmi 10A (MIUI 12.5.16)
• Android version: 11

Channel information

• [X] release (stable)
• [ ] beta
• [ ] nightly

Reproducibility

• [X] with Brave Shields disabled
• [X] with Brave Rewards disabled
• [ ] in the latest version of Chrome

Miscellaneous information

Keyboard: Microsoft SwiftKey 9.10.44

[SergeyZhukovsky]

@cowcatfox I have hard time reproducing it. I don't have a real device running Android 11, but I tried an emulator on Android 11 and installed the Microsoft SwiftKey keyboard there. I can't open libgen.rs though, so I tried on archive.is only. Could you tell more?

• do you have any autofill services set up on your system settings?
• do you see the same behaviour on Brave Nightly and Beta?
• are you able to check that on Chrome browser? It would be very helpful if you can try the above ^.