Fan-out / fan-in - closing result channel

I'm producing items, consuming from multiple co-routines and pushing back to resultChannel. Producer is closing its channel after last item.

The code never finishes as resultChannel is never being closed. How to detect and properly finish iteration so hasNext() return false?

val inputData = (0..99).map { "Input$it" }
val threads = 10

val bundleProducer = produce<String>(CommonPool, threads) {
    inputData.forEach { item ->
        send(item)
        println("Producing: $item")
    }

    println("Producing finished")
    close()
}

val resultChannel = Channel<String>(threads)

repeat(threads) {
    launch(CommonPool) {
        bundleProducer.consumeEach {
            println("CONSUMING $it")
            resultChannel.send("Result ($it)")
        }
    }
}

val iterator = object : Iterator<String> {
    val iterator = resultChannel.iterator()
    override fun hasNext() = runBlocking { iterator.hasNext() }
    override fun next() = runBlocking { iterator.next() }
}.asSequence()

println("Starting interation...")

val result = iterator.toList()

println("finish: ${result.size}")