I am facing the same issue as well. fetch crashes, but on the same FetchDescriptor fetchCount return correct result. To be more specific. I have a @ModelActor in which I am making some fetch and insert calls. This modelActor is initialized with modelContainer from the @Environment modelContext on .onAppear, and then calls to insert are made. After insertion is done, fetch call is made.
The @ModelActor is a singleton to maintain a single modelContext across the app. And I am also initializing the .modelContainer as a @State instead of a let.
The app works on iOS 17, but crashes just like OP mentioned on iOS 18.
I've checked the SwiftData forum posts but no solution, is there anything anyone from the Apple Dev Team can point to regarding this?
ragnar48h
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution