Swift 1.2 breaks my __FUNCTION__

gistfile1.swift

// no longer compiles in swift 1.2
func someFunc(block: () -> (), functionName: String = __FUNCTION__) {
    println("NEAT!")
    block()
}

someFunc {
    println("oh")
}

/*
playground215.swift:7:10: error: missing argument for parameter #1 in call
someFunc {
         ^
*/

// UPDATE: ok this really never made sense. New behavior is better.
// now default functionName is first param, and closure is second. Works much better.