Rxswift: Reporting UIKit iOS 10 issue: Why isn't UISwitch being deallocated ... ever, help wanted.

[kzaher]

I'm asking for help on this. I have no idea why is this happening, but it looks like every instance of UISwitch isn't being deallocated ... ever

Simplest way to experience it:

class Switchy : UISwitch {
    deinit {
        print("bye, just smile and :wave: boys") // This will never be printed
    }
}

....

Switchy(frame: .zero) // never being deallocated
UISwitch(frame: .zero).rx.deallocating.subscribe(onNext: { _ in print("This will never be called") })
UISwitch(frame: .zero).rx.deallocated.subscribe(onNext: { _ in print("This will never be called") })

[jegnux]

Basic retain cycle.
UISwitch seems to retain an instance of a UISwitchModernVisualElement object through the _visualElement property, with retain itself the UISwitch element through the _switchControl property.
=> bugreport.apple.com ?

[bontoJR]

Oh yeah, good catch! It's happening on the beta as well, UISwitch is never deallocated.
As @JegnuX said, it seems an rdar is necessary.

[kzaher]

I've just reported it on bugreport.apple.com ¯_(ツ)_/¯