IssueTracker

I have a bottom nav bar integration set up based on https://developer.android.com/develop/ui/compose/navigation#bottom-nav and I'm trying to clear saved states of individual tabs when logging out via navController.clearBackStack() as suggested e.g. in https://issuetracker.google.com/issues/303194381. Each tab has its own child graph and I'm passing the child graph's route as a parameter to clearBackStack(). When I call clearBackStack() for the first tab while in the second tab, it crashes with java.lang.IllegalStateException: Restore State failed. It only crashes if there was some other entry in the back stack before navigating from the first tab to the second tab. If there was no such entry, it doesn't crash.

Component used:

• Navigation

Version used:

• 2.7.7

Devices/Android versions reproduced on:

• Pixel 3a API 34 (Emulator)

Sample project to trigger the issue:

• https://github.com/okycelt/androidx-navigation-clearbackstack-crash

Steps to reproduce:

1. On home screen, navigate to detail screen
2. Navigate to account screen using bottom nav bar
3. On account screen, click "Log out" (and it crashes)

Stack trace:

java.lang.IllegalStateException: Restore State failed: destination -1669244386 cannot be found from the current destination Destination(0x50a48200) route=account
	at androidx.navigation.NavController.instantiateBackStack(NavController.kt:2036)
	at androidx.navigation.NavController.restoreStateInternal(NavController.kt:1945)
	at androidx.navigation.NavController.restoreStateInternal(NavController.kt:1953)
	at androidx.navigation.NavController.clearBackStackInternal(NavController.kt:826)
	at androidx.navigation.NavController.clearBackStack(NavController.kt:785)
	at cz.okycelt.pg.navigation.AppNavHostKt$AppNavHost$1$2$1$1.invoke(AppNavHost.kt:55)
	at cz.okycelt.pg.navigation.AppNavHostKt$AppNavHost$1$2$1$1.invoke(AppNavHost.kt:53)