Swift NSCountedSet init with array bug?

Question

There seems to be a bug in Swift Playground with the use of NSCountedSet.

This code works as intended

let numbers = [1,2,2,4,6,7,8,8,5,8,1]

let set          


        

Answer 1

Update: As @carbo18 reported, this has been fixed in Xcode 6.3 beta 4.

Old answer: That definitely looks like a bug. NSCountedSet has initializers

convenience init(array: [AnyObject])
convenience init(set: NSSet)

but

let b1 = NSCountedSet(array: [])     // extra argument 'array' in call
let b2 = NSCountedSet(set: NSSet())  // extra argument 'set' in call

both fail to compile.

This was also reported in the Apple Developer Forum (https://devforums.apple.com/message/1081850#1081850), where the following workaround is given:

let numbers = [1,2,2,4,6,7,8,8,5,8,1]
let bag = NSCountedSet()
bag.addObjectsFromArray(numbers)