Is it legal? I mean `init` function type. ``` fu...

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[turansky]

Is it legal? I mean init function type.

fun main(args: Array<String>) {
	creator("C") {
       step("a")
       step("b") 
    }
}

fun creator(id: String, init: Creator.(String) -> Unit): Creator {
    val c = Creator(id)
    c.init(id)
    return c
}

class Creator(private val id: String) {
    
    init {
        println("Init creator $id")
    }
    
    fun step(id: String) {
        println("Creator ${this.id}, Step $id")
    }
}

Is it possible to use such behaviour? Or it is a compiler bug?
http://try.kotlinlang.org/#/UserProjects/ervakeekdml7mvu595iqbuautr/bn7iou7oml7qdr36hkpscsnlkg