When should a missing @Inject dep crash?

[sureshjoshi]

Using a creation pattern of:

private static let dependencies = Dependencies {
        Module { AccountStore.shared as AccountDataSource }
        Module { RealmStore.shared as RealmStore }
    }

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        Self.dependencies.build()
        ...

I expected that as soon as a view model with an @Inject that is not in the dependencies would crash. In reality, it crashes on usage of that Inject (which was pretty surprising).

final class BrokenViewModel {
    @Inject var accountStore: AccountDataStore
    @Inject var realmStore: RealmStore
    @Inject var otherStore: OtherStore
    
    init() {
        // Use accountStore and realmStore - no problemo
    }
    
    func foo() {
        otherStore.bar() // CRASH
    }

I would have assumed on instantiation of BrokenViewModel that it would crash because the Injection couldn't be resolved?

[basememara]

Right, it would crash on first use of the properties. I've been thinking of having a build process you'd put in a phase that would run the entire container to check and give an Xcode error if one of the dependencies are missing.