Swift array with Typed Swift enum causes crash when Encoding

[jakobmygind]

enum Attribute: String {
case one = "15"
case two = "19"
case three = ""
}

struct MyStructType {
var myArray = [Attribute.one]
}

extension MyStructType: Serializable {
init(dictionary: NSDictionary?) {
myArray <== (self, dictionary, "myArray")
}

func encodableRepresentation() -> NSCoding {
    let dict = NSMutableDictionary()
    (dict, "myArray") <== myArray // myArray.map({ $0.encodableRepresentation() }) seems to fix it
    return dict
}

}

func shouldTriggerCrash() {
let theInstance = MyStructType()
Cashier.defaultCache().setSerializable(theInstance, forKey: rideContainerCacheKey)//Crashes
}