Xcode-beta (7A120f): Guard statement issue in top-level playground

Originator:owensd
Number:rdar://21295773 Date Originated:
Status: Resolved:
Product: Product Version:
Classification: Reproducible:
 
The guard statement doesn’t work top-level in a playground.

— code —

enum MyCustomError : ErrorType {
    case BadError
    case GoodError
}

let items = [1 : "hi", 2 : "bye", 3 : "hello" , 4 : "goodbye"]

guard let item = items[3] else { throw MyCustomError.GoodError }
item

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