IllegalArgumentException: pointerIndex out of range

• Android version: 11
• Phone model: Redmi Note 5
• Briar version: 1.3.4 (76b7e6fe)
• User feedback: "Sent a picture, then click on it to show it."

Log snippet:

05-28 06:43:28.401 I/BaseActivity: Pausing ConversationActivity
05-28 06:43:28.416 I/BaseActivity: Creating ImageActivity
05-28 06:43:28.441 I/BaseActivity: Starting ImageActivity
05-28 06:43:28.444 I/BaseActivity: Resuming ImageActivity
05-28 06:43:28.894 I/BaseActivity: Stopping ConversationActivity

Stacktrace:

java.lang.IllegalArgumentException: pointerIndex out of range
        at android.view.MotionEvent.nativeGetAxisValue(Native Method)
        at android.view.MotionEvent.getX(MotionEvent.java:2401)
        at androidx.viewpager.widget.ViewPager.onInterceptTouchEvent(ViewPager.java:2072)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2664)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
        at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:488)
        at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1873)
        at android.app.Activity.dispatchTouchEvent(Activity.java:4125)
        at androidx.appcompat.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
        at androidx.appcompat.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
        at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:446)
        at android.view.View.dispatchPointerEvent(View.java:14568)
        at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:6022)
        at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5825)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5316)
        at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5373)
        at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5339)
        at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5491)
        at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5347)
        at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5548)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5320)
        at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5373)
        at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5339)
        at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5347)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5320)
        at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:8086)
        at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:8037)
        at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7998)
        at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:8209)
        at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:220)
        at android.os.MessageQueue.nativePollOnce(Native Method)
        at android.os.MessageQueue.next(MessageQueue.java:335)
        at android.os.Looper.loop(Looper.java:183)
        at android.app.ActivityThread.main(ActivityThread.java:7660)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

Looks like this is a very longstanding bug in the support library/AndroidX that was fixed recently. We may be able to fix the issue by upgrading the ViewPager library. Alternatively, various people on StackOverflow suggest workarounds that wrap the ViewPager to catch the exception.