demo 打开不保留活动，应用回后台，再进入前台应用崩溃

[xieguangqing]

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.github.fragivity.example/com.github.fragivity.example.MainActivity}: java.lang.IllegalStateException: Restoring the Navigation back stack failed: destination 177236320 cannot be found from the current destination Destination(0x926c814) label=home class=com.github.fragivity.example.HomeFragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3308)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3457)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2044)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:224)
at android.app.ActivityThread.main(ActivityThread.java:7562)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)
Caused by: java.lang.IllegalStateException: Restoring the Navigation back stack failed: destination 177236320 cannot be found from the current destination Destination(0x926c814) label=home class=com.github.fragivity.example.HomeFragment
at androidx.navigation.NavController.onGraphCreated(NavController.java:617)
at androidx.navigation.NavController.setGraph(NavController.java:590)
at androidx.navigation.NavController.setGraph(NavController.java:570)
at com.github.fragivity.NavHostUtil.loadRoot(NavHost.kt:111)
at com.github.fragivity.example.MainActivity.onCreate(MainActivity.kt:21)
at android.app.Activity.performCreate(Activity.java:7893)
at android.app.Activity.performCreate(Activity.java:7880)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1307)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3283)