Bug related to having an optional enum in a struct in Swift

Bug.swift

import Foundation

public struct FeaturedItem {
	public enum ImageSource {
		case Bundled(name: String) // simplified enum with one case to illustrate the bug.
	}
	
	public let localizedTitleImageSource: ImageSource? // This optional causes Swift to barf. If it's non-optional, it compiles fine
	// Workaround in this case is to just use an optional String instead of the enum.
}


extension FeaturedItem {
	public static let bundledItems = [ // this needs to have at least one object in the array
		FeaturedItem(
			localizedTitleImageSource: .Bundled(name: "some name")
		)
	]
}