Swift Failable Initializer

good.swift

import Foundation

class User {

    let name: String

    init(name: String) {
        self.name = name
    }
    
    convenience init?(name: String?) {
        guard let name = name else { return nil }
        self.init(name: name)
    }
    
}

wrong.swift

import Foundation

class User {
    
    let name: String

    init?(name: String?) {
        guard let name = name else { return nil } // Error: "All stored properties of a class instance must be initialized before returning nil from an initializer"
        self.name = name
    }
    
}