MKPlacemark() creating retain cycle

Question

I have a @State property that's initialized with a struct I created (Landmark) that takes in a MKPlacemark.

@State private var selectedLandmark: Landmark = Landmark(placemark: MKPlacemark())

Here's the code for the struct:

import Foundation
import MapKit

struct Landmark {

let placemark: MKPlacemark

var id: UUID {
    UUID()
}

var name: String {
    placemark.name ?? ""
}

var title: String {
    placemark.title ?? ""
}

var coordinate: CLLocationCoordinate2D {
    placemark.coordinate
}
}

Whenever there are any updates to any state/binding vars within this view, I get a EXC_BAD_ACCESS error and no logs. If I remove the reference to MKPlacemark, everything works fine. Is this possibly a case of a strong reference being retained somewhere?

Steps to reproduce:

Create a "child" view:

import SwiftUI
import MapKit

struct MKPlaceChild: View {
    @Binding var showCreateEvent: Bool
    @State private var selectedLandmark: Landmark = Landmark(placemark: MKPlacemark())

var body: some View {
    VStack {
        Text("Hello, World!")
        
        Button("Cancel") {
            self.showCreateEvent = false
        }
    }
}
}

Create a parent view:

struct MKPlaceParent: View {
    @State var showCreateEvent: Bool = true
    var body: some View {
        VStack {
            if showCreateEvent {
                MKPlaceChild(showCreateEvent: $showCreateEvent)
            } else {
                Text("Hello")
            }
        }
    }
}

If you tap on "Cancel" button, an error occurs:( Any help would be appreciated

Answer 1

The problem is in wrong initialiser. Here is fixed part (tested with Xcode 12 / iOS 14)

struct MKPlaceChild: View {
    @Binding var showCreateEvent: Bool
    @State private var selectedLandmark: Landmark = Landmark(placemark: 
          MKPlacemark(coordinate: CLLocationCoordinate2D()))      // << here !!
    ...