sharedKoinViewModel fails with type-safe navigation routes

[nazaburo]

Describe the bug
The sharedKoinViewModel function in koin-compose-viewmodel-navigation doesn't work correctly with type-safe navigation (serializable routes). When the default parameter is used, it causes a runtime crash because the serializable route object from destination.parent?.route is incorrectly treated as a String route by NavController.getBackStackEntry(), leading to a type mismatch.

Environment

• Koin version: 4.1.1
• Navigation Compose version: 2.9.5
• Kotlin version: 2.2.20
• Compose BOM: 2025.10.00

The Problem
When using type-safe navigation with @serializable routes and the default parameter navGraphRoute: Any? = this.destination.parent?.route, the function receives a serializable route object but NavController.getBackStackEntry() internally treats it as if it were a String route, causing a type mismatch.

The navigation graph was created with serializable route objects, but getBackStackEntry() tries to match it as a String representation, so the entry cannot be found and crashes.

Sample Project
I've created a minimal reproduction project that demonstrates this issue:
https://github.com/nazaburo/SharedKoinViewModelSample

Proposed Fix
I've submitted a pull request with a suggested fix:
nazaburo/SharedKoinViewModelSample#2

The fix properly handles both String-based and serializable routes by detecting the route type and calling the appropriate getBackStackEntry() overload.

[aurimas-zarskis]

Hey, I ran into same issue, but in my case it crashes with both type-safe routes and string based routes.
This is the navigation setup I was testing with:

navigation(route = "root", startDestination = "screen1") {
    composable(route = "screen1") {
        val viewModel = it.sharedKoinViewModel<SharedViewModelTest>(mainNavController)
        Screen(viewModel) {
            mainNavController.navigate("screen2")
        }
    }
    composable(route = "screen2") {
        val viewModel = it.sharedKoinViewModel<SharedViewModelTest>(mainNavController)
        Screen2(viewModel)
    }
}

Then I used this to navigate: mainNavController.navigate("root")
After navigation the app crashed with this error: Destination with route String cannot be found in navigation graph ComposeNavGraph
I'm using compose multiplatform btw

[nazaburo]

@aurimas-zarskis
This should be fixed by PR #2293. I've tested both Type-Safe and String-based navigation with sharedKoinViewModel and both work correctly after the fix. Test cases have been added to
sample-android-compose.