Android Navigation Component: java.lang.IllegalStateException: unknown destination during restore

Question

I'm using Android's AAC Navigation Component and have implemented conditional navigation for my login flow as described in this post: Navigation Architecture Component - Login screen

Now everything appears to be working, however after being navigated to the login screen and successfully logging in then navigating back to the main screen, on rotation the app crashes with the following error:

--------- beginning of crash
2019-02-02 13:08:28.423 6030-6030/uk.co.victoriajanedavis.chatapp E/AndroidRuntime: FATAL EXCEPTION: main
    Process: uk.co.victoriajanedavis.chatapp, PID: 6030
    java.lang.RuntimeException: Unable to start activity ComponentInfo{uk.co.victoriajanedavis.chatapp/uk.co.victoriajanedavis.chatapp.presentation.ui.main.MainActivity}: android.view.InflateException: Binary XML file line #10: Binary XML file line #10: Error inflating class fragment
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4699)
        at android.app.ActivityThread.-wrap18(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1595)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6494)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
     Caused by: android.view.InflateException: Binary XML file line #10: Binary XML file line #10: Error inflating class fragment
     Caused by: android.view.InflateException: Binary XML file line #10: Error inflating class fragment
     Caused by: java.lang.IllegalStateException: unknown destination during restore: uk.co.victoriajanedavis.chatapp:id/friendsFragment
        at androidx.navigation.NavController.onGraphCreated(NavController.java:483)
        at androidx.navigation.NavController.setGraph(NavController.java:459)
        at androidx.navigation.NavController.setGraph(NavController.java:424)
        at androidx.navigation.NavController.setGraph(NavController.java:406)
        at androidx.navigation.fragment.NavHostFragment.onCreate(NavHostFragment.java:226)
        at androidx.fragment.app.Fragment.performCreate(Fragment.java:2414)
        at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:844)
        at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:1129)
        at androidx.fragment.app.FragmentManagerImpl.onCreateView(FragmentManagerImpl.java:3132)
        at androidx.fragment.app.FragmentController.onCreateView(FragmentController.java:133)
        at androidx.fragment.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:345)
        at androidx.fragment.app.FragmentActivity.onCreateView(FragmentActivity.java:324)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
        at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:141)
        at uk.co.victoriajanedavis.chatapp.presentation.ui.main.MainActivity.onCreate(MainActivity.kt:22)
        at android.app.Activity.performCreate(Activity.java:7009)
        at android.app.Activity.performCreate(Activity.java:7000)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4699)
        at android.app.ActivityThread.-wrap18(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1595)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6494)
        at java.lang.reflect.Method.invoke(Native Method)
2019-02-02 13:08:28.423 6030-6030/uk.co.victoriajanedavis.chatapp E/AndroidRuntime:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

Here is my nav_graph.xml (the id's responsible for the login flow are @+id/action_friendsFragment_to_loginFlowGraph, @+id/action_loginFragment_to_chatFlowGraph, @+id/action_signupFragment_to_chatFlowGraph):

<?xml version="1.0" encoding="utf-8"?>
<navigation
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/nav_graph"
    app:startDestination="@id/chatFlowGraph">

    <!-- Chat Flow (nested graph) -->
    <navigation android:id="@+id/chatFlowGraph"
        app:startDestination="@id/friendsFragment">

        <fragment
            android:id="@+id/friendsFragment"
            android:name="uk.co.victoriajanedavis.chatapp.presentation.ui.friends.FriendRequestsToolbarFragment"
            android:label="fragment_friends"
            tools:layout="@layout/fragment_friend_requests_toolbar">

            <action
                android:id="@+id/action_friendsFragment_to_loginFlowGraph"
                app:destination="@id/loginFlowGraph"
                app:popUpTo="@id/chatFlowGraph"
                app:popUpToInclusive="true"
                app:enterAnim="@anim/slide_in_bottom"
                app:exitAnim="@anim/fade_out"
                app:popEnterAnim="@anim/fade_in"
                app:popExitAnim="@anim/slide_out_bottom"/>

            <action
                android:id="@+id/action_friendsFragment_to_chatFragment"
                app:destination="@id/chatFragment"/>

            <action
                android:id="@+id/action_friendsFragment_to_friendRequestsFragment"
                app:destination="@id/friendRequestsFragment"
                app:enterAnim="@anim/grow_in_top_right"
                app:exitAnim="@anim/fade_out"
                app:popEnterAnim="@anim/fade_in"
                app:popExitAnim="@anim/grow_out_top_right"/>
        </fragment>

        <fragment
            android:id="@+id/chatFragment"
            android:name="uk.co.victoriajanedavis.chatapp.presentation.ui.chat.ChatFragment"
            android:label="fragment_chat"
            tools:layout="@layout/fragment_chat" />
    </navigation>

    <!-- Login/Register Flow (nested graph) -->
    <navigation android:id="@+id/loginFlowGraph"
        app:startDestination="@id/loginFragment">

        <fragment
            android:id="@+id/loginFragment"
            android:name="uk.co.victoriajanedavis.chatapp.presentation.ui.login.LoginFragment"
            android:label="fragment_login"
            tools:layout="@layout/fragment_login">

            <action
                android:id="@+id/action_loginFragment_to_chatFlowGraph"
                app:destination="@id/chatFlowGraph"
                app:popUpTo="@id/loginFlowGraph"
                app:popUpToInclusive="true"/>

            <action
                android:id="@+id/action_loginFragment_to_signupFragment"
                app:destination="@id/signupFragment"
                app:enterAnim="@anim/slide_in_right"
                app:exitAnim="@anim/slide_out_left"
                app:popEnterAnim="@anim/slide_in_left"
                app:popExitAnim="@anim/slide_out_right"/>

        </fragment>

        <fragment
            android:id="@+id/signupFragment"
            android:name="uk.co.victoriajanedavis.chatapp.presentation.ui.signup.SignupFragment"
            android:label="fragment_signup"
            tools:layout="@layout/fragment_signup">

            <action
                android:id="@+id/action_signupFragment_to_chatFlowGraph"
                app:destination="@id/chatFlowGraph"
                app:popUpTo="@id/loginFlowGraph"
                app:popUpToInclusive="true"/>

        </fragment>

    </navigation>

    <!-- FriendRequestsFragment -->
    <fragment
        android:id="@+id/friendRequestsFragment"
        android:name="uk.co.victoriajanedavis.chatapp.presentation.ui.friendrequests.FriendRequestsFragment"
        android:label="fragment_friend_requests"
        tools:layout="@layout/fragment_friend_requests">
        <action
            android:id="@+id/action_friendRequestsFragment_to_sendFriendRequestFragment"
            app:destination="@id/sendFriendRequestFragment"
            app:enterAnim="@anim/slide_in_bottom"
            app:exitAnim="@anim/fade_out"
            app:popEnterAnim="@anim/fade_in"
            app:popExitAnim="@anim/slide_out_bottom"/>
    </fragment>

    <!-- SendFriendRequestFragment -->
    <fragment
        android:id="@+id/sendFriendRequestFragment"
        android:name="uk.co.victoriajanedavis.chatapp.presentation.ui.friendrequests.sent.send.SendFriendRequestFragment"
        android:label="fragment_send_friend_request"
        tools:layout="@layout/fragment_send_friend_request" />

</navigation>

EDIT: using the latest navigation component version 1.0.0-alpha11

Answer 1

Looks like this bug still existed even after 1.0.0-beta01

From the changelog, we can see it solved in 2.1.0-alpha04

Answer 2

This bug was fixed in version 1.0.0-beta01 of the navigation component.