Hello, we are seeing a weird crash using Koin in a...

# koin

[wbertan]

Hello, we are seeing a weird crash using Koin in a KMM project 🤔
We call koin.get(objCObject: type) *as*! T in Swift and it works, we are calling it in SceneDelegate willConnectTo.
When opening the app, all works, putting the app in background, still works, coming back still works. After some time the app in Background, we can see a bunch of crashes in that line on SceneDelegate trying to get the dependency.
The object I’m trying to get in SceneDelegate is the IsAuthenticatedUseCase (hence I’m putting everything it needs to actually creates its own dependencies - in 🧵).
koin is created and started in SceneDelegate, or the error would be a nil if it wasn’t.

Non-fatal Exception: InstanceCreationException
Could not create instance for [Singleton:'my.package.common.core.authentication.IsAuthenticatedUseCase']

Sorry for the stacktrace, we are using CrashKiOS to actually be able to see this crash, will post the stacktrace, and definition of dependencies in 🧵

[wbertan]

Here are the definitions we have for all the dependencies:

single<Settings>(qualifier(SettingsQualifier.ENCRYPTED)) {
        KeychainSettings(KEYCHAIN_SERVICE_NAME)
    }
    single<WebAuthRepository> {
        WebAuthRepositoryImpl(
            settings = get(named(SettingsQualifier.ENCRYPTED)),
        )
    }
    single<MutableStateFlow<Boolean>>(named(AuthenticationQualifier.AUTH)) {
        val isAuthenticated = get<WebAuthRepository>().refreshToken != null
        MutableStateFlow(isAuthenticated)
    }
    single<IsAuthenticatedUseCase> {
        IsAuthenticatedUseCaseImpl(
            isAuthenticatedMutableStateFlow = get(named(AuthenticationQualifier.AUTH)),
        )
    }

[wbertan]

Stacktrace