Failed to receive all elements when using produce with a buffered channel

Run the following code

fun main(args: Array<String>) = runBlocking<Unit> {
    val producer = produce<Int>(coroutineContext, capacity = 1) {
        for(i in 1..2) {
            send(i)
            println("Sent: $i")
        }
    }

    for (x in producer) {
        println("Received: $x")
    }
}

The output is:

Sent: 1
Sent: 2
Received: 1

while expected output is:

Sent: 1
Sent: 2
Received: 1
Received: 2

The problem shows up with any buffered chennel (ArrayChannel and LinkedListChannel) and does not show up with RendezvousChannel (capacity = 0). It only affects produce builder. Replacing produce with an “manual” code via launch works as expected:

    val producer = Channel<Int>(1)
    launch(coroutineContext) {
        for(i in 1..2) {
            producer.send(i)
            println("Sent: $i")
        }
        producer.close()
    }

[elizarov]

The problem is actually in produce. It cancels(sic!) the underlying channel (instead of closing) when producing coroutine returns. That’s the bug. will be fixed soon.

[ansman]

@elizarov Is the only workaround not to use produce for now?