Crash adapterDataObserver was not registered

[omkar-tenkale]

java.lang.IllegalStateException: Observer com.qtalk.recyclerviewfastscroller.RecyclerViewFastScroller$adapterDataObserver$1$1@4a87042 was not registered. at android.database.Observable.unregisterObserver(Observable.java:69) at androidx.recyclerview.widget.RecyclerView$Adapter.unregisterAdapterDataObserver(RecyclerView.java:7537) at com.qtalk.recyclerviewfastscroller.RecyclerViewFastScroller.detachFastScrollerFromRecyclerView(Unknown Source:31) at com.qtalk.recyclerviewfastscroller.RecyclerViewFastScroller.onDetachedFromWindow(Unknown Source:0) at android.view.View.dispatchDetachedFromWindow(View.java:20534) at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:3942) at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:3934) at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:3934) at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:3934) at android.view.ViewGroup.removeViewInternal(ViewGroup.java:5560) at android.view.ViewGroup.removeViewAt(ViewGroup.java:5507) at androidx.recyclerview.widget.RecyclerView$5.removeViewAt(RecyclerView.java:915) at androidx.recyclerview.widget.ChildHelper.removeViewAt(ChildHelper.java:168) at androidx.recyclerview.widget.RecyclerView$LayoutManager.removeViewAt(RecyclerView.java:8946) at androidx.recyclerview.widget.RecyclerView$LayoutManager.removeAndRecycleViewAt(RecyclerView.java:9217) at androidx.recyclerview.widget.LinearLayoutManager.recycleChildren(LinearLayoutManager.java:1437) at androidx.recyclerview.widget.LinearLayoutManager.recycleViewsFromEnd(LinearLayoutManager.java:1531) at androidx.recyclerview.widget.LinearLayoutManager.recycleByLayoutState(LinearLayoutManager.java:1556) at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1582) at androidx.recyclerview.widget.LinearLayoutManager.scrollBy(LinearLayoutManager.java:1395) at androidx.recyclerview.widget.LinearLayoutManager.scrollHorizontallyBy(LinearLayoutManager.java:1124) at androidx.recyclerview.widget.RecyclerView.scrollStep(RecyclerView.java:1969) at androidx.recyclerview.widget.RecyclerView$ViewFlinger.run(RecyclerView.java:5476) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:972) at android.view.Choreographer.doCallbacks(Choreographer.java:796) at android.view.Choreographer.doFrame(Choreographer.java:727) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:957) at android.os.Handler.handleCallback(Handler.java:938) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7656) 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)