countElements() bug in Swift?!

countElementsBugMaybe.swift

/**
 * Is this a bug or is this the way as it is designed by Apple?
 * I can't think that this isn't a bug but who knows...
 */

var str = "\r\n"

countElements(str)          // Returns 1
(str as NSString).length    // Returns 2

/**
 * This only happens for the combination of '\r' and '\n'
 *
 * NOT for '\r' or '\n' alone
 */

var strN = "\n"

countElements(strN)         // returns 1
(strN as NSString).length   // returns 1

var strR = "\r"

countElements(strR)         // returns 1
(strR as NSString).length   // returns 1