Component used: Navigation
Version used: Navigation 1.0.0-alpha08, Fragment 1.1.0-alpha02
Devices/Android versions reproduced on: Device - Pixel 1, Android Ver - 9

If this is a bug in the library, we would appreciate if you could attach:

My scenario is that between fragments I open an activity then comes back again. Until now it's normal works. But when I open the activity again that will cause a crash.

The error message as below:

2018-12-11 20:18:46.610 E: FATAL EXCEPTION: main
Process: com.cloverlab.karitoke, PID: 22006
java.lang.IllegalStateException: Failure saving state: active CollectionResultV2Fragment{497828d (878deff6-3700-4a61-b490-7f854474fdf6) id=0x7f0a013d} was removed from the FragmentManager
at androidx.fragment.app.FragmentManagerImpl.saveAllState(FragmentManagerImpl.java:2315)
at androidx.fragment.app.Fragment.performSaveInstanceState(Fragment.java:2629)
at androidx.fragment.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManagerImpl.java:2267)
at androidx.fragment.app.FragmentManagerImpl.saveAllState(FragmentManagerImpl.java:2326)
at androidx.fragment.app.Fragment.performSaveInstanceState(Fragment.java:2629)
at androidx.fragment.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManagerImpl.java:2267)
at androidx.fragment.app.FragmentManagerImpl.saveAllState(FragmentManagerImpl.java:2326)
at androidx.fragment.app.Fragment.performSaveInstanceState(Fragment.java:2629)
at androidx.fragment.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManagerImpl.java:2267)
at androidx.fragment.app.FragmentManagerImpl.saveAllState(FragmentManagerImpl.java:2326)
at androidx.fragment.app.FragmentController.saveAllState(FragmentController.java:150)
at androidx.fragment.app.FragmentActivity.onSaveInstanceState(FragmentActivity.java:496)
at androidx.appcompat.app.AppCompatActivity.onSaveInstanceState(AppCompatActivity.java:511)
at android.app.Activity.performSaveInstanceState(Activity.java:1549)
at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1443)
at android.app.ActivityThread.callActivityOnSaveInstanceState(ActivityThread.java:4809)
at android.app.ActivityThread.callActivityOnStop(ActivityThread.java:4157)
at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:4121)
at android.app.ActivityThread.handleStopActivity(ActivityThread.java:4196)
at android.app.servertransaction.StopActivityItem.execute(StopActivityItem.java:41)
at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:145)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:70)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)