Xcode-beta (7A120f): Compilation error calling assert

Originator:david.w.hart
Number:rdar://21459429 Date Originated:19-Jun-2015 02:38 PM
Status:Open Resolved:
Product:Developer Tools Product Version:Xcode-beta (7A120f)
Classification:Serious Bug Reproducible:Always
 
Drop the following error in a playground for a weird compilation error:

import UIKit

extension UIView {
	var firstSubview: UIView? {
		if let firstSubview = self.subviews.first {
			assert(firstSubview != nil, "ASSERT COMPILATION ERROR")
			return firstSubview
		} else {
			return nil
		}
	}
}

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