ArrayLeakResolved.swift

class WeakBox<T: AnyObject> {
    weak var value: T?
    
    init(_ value: T) {
        self.value = value
    }
}

class Subscriber {
    let publisher: Publisher
    
    init(publisher: Publisher) {
        self.publisher = publisher
    }
    
    deinit {
        print("Subscriber deinit")
    }
}

class Publisher {
    var subscribers: [WeakBox<Subscriber>] = []
    
    deinit {
        print("Publisher deinit")
    }
}

do {
    let publisher = Publisher()
    
    let subscriber = Subscriber(publisher: publisher)
    
    publisher.subscribers.append(WeakBox(subscriber))
}