Overriding Extensions bug fixed in Swift 2.0

OverrideExtension.swift

import UIKit

extension UIView {
    public override var accessibilityLabel: String? {
        get {
            return "Hi \(super.accessibilityLabel)"
        }
        set {
            super.accessibilityLabel = newValue
        }
    }
}

extension UIButton {
    public override var accessibilityLabel: String? {
        get {
            return "Hi there \(super.accessibilityLabel)"
        }
        set {
            super.accessibilityLabel = newValue
        }
    }
}

let view = UIView()
view.accessibilityLabel = "Bob"
view.accessibilityLabel

let button = UIButton()
button.accessibilityLabel = "Jill"
button.accessibilityLabel