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)