Artifact used Happening across every version. Devices/Android versions reproduced on: All versions.

This is our biggest issue on our Crashlytics dashboard. It has been ongoing for months.

Sample stacktraces:

Fatal Exception: java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Object[] at androidx.collection.SimpleArrayMap.allocArrays(:170) at androidx.collection.SimpleArrayMap.put(:458) at androidx.coordinatorlayout.widget.DirectedAcyclicGraph.addNode(:55) at androidx.coordinatorlayout.widget.CoordinatorLayout.prepareChildren(:698) at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasure(:767) at android.view.View.measure(View.java:25785)

RecyclerView:

androidx.collection.SimpleArrayMap.allocArrays (Unknown Source:170) androidx.recyclerview.widget.RecyclerView.onLayout (Unknown Source:4404)

Bottom Navigation:

Fatal Exception: java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Object[] at androidx.collection.SimpleArrayMap.allocArrays(:170) at androidx.collection.SimpleArrayMap.put(:458) at androidx.transition.Transition.addViewValues(:1532) at androidx.transition.Transition.captureHierarchy(:1627) at androidx.transition.Transition.captureHierarchy(:1650) at androidx.transition.Transition.captureHierarchy(:1650) at androidx.transition.Transition.captureHierarchy(:1650) at androidx.transition.Transition.captureValues(:1511) at androidx.transition.TransitionManager.sceneChangeSetup(:318) at androidx.transition.TransitionManager.beginDelayedTransition(:418) at com.google.android.material.bottomnavigation.BottomNavigationMenuView.updateMenuView(:590) at com.google.android.material.bottomnavigation.BottomNavigationPresenter.updateMenuView(:69) at androidx.appcompat.view.menu.MenuBuilder.dispatchPresenterUpdate(:292) at androidx.appcompat.view.menu.MenuBuilder.onItemsChanged(:1063) at androidx.appcompat.view.menu.MenuBuilder.startDispatchingItemsChanged(:1090) at androidx.appcompat.view.menu.MenuBuilder.setExclusiveItemChecked(:627) at androidx.appcompat.view.menu.MenuItemImpl.setChecked(:622) at com.google.android.material.bottomnavigation.BottomNavigationMenuView$1.onClick(:128) at android.view.View.performClick(View.java:6291) at android.view.View$PerformClick.run(View.java:24931) at android.os.Handler.handleCallback(Handler.java:808) at android.os.Handler.dispatchMessage(Handler.java:101) at android.os.Looper.loop(Looper.java:166) at android.app.ActivityThread.main(ActivityThread.java:7529) at java.lang.reflect.Method.invoke(Method.java) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:245) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:921)

There are many different variations, but they all have one thing in common: androidx.collection.SimpleArrayMap

It has happened to me on occasion, there's no pattern to it. Sometimes I'll just start the app, press a button on the BottomNavigationView then it crashes with java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Object[]

To be clear, we are not using SimpleArrayMap in our code, this is coming from within the Framework. There are several cases in our dashboard, mostly stemming from View methods measure, layout, performClick, dispatchOnPreDraw, etc.