myStruct is a nested, Codable struct that matches some confidential JSON. No enum in there. Why does my app crash with EXC_BREAKPOINT on saving and access to myStruct?

@Model
final class MyModel {
    var myStruct: MyStruct
    
    init(myStruct: MyStruct) {
        self.myStruct = myStruct
    }
}

This ugly workaround fixes the crash:

@Model
final class MyModel {
    var myStructStr: String
    
    var myStruct: MyStruct {
        get {
            try! JSONDecoder().decode(MyStruct.self, from: myStructStr.data(using: .utf8)!)
        }
        set {
            myStructStr = String(data: JSONEncoder().encode(newValue), encoding: .utf8)!
        }
    }
    
    init(myStruct: MyStruct) {
        self.myStructStr = String(data: JSONEncoder().encode(myStruct), encoding: .utf8)!
    }
}