Is there anything like 'daemon coroutine' in

coroutineScope

that will be cancelled if other things in it are completed? Normally tasks running in

launch

in it will cause

coroutineScope

not to return.

one possibility:

runBlocking {
    val job = Job()
    launch(job) {
        while (true) yield()
    }
    launch(job) {
        delay(5_000)
    }

    delay(100)

    job.cancel()
}
// done in 100ms

I asked this because I was lazy to write `.cancel()`; However this seems quite good.

you shouldn't need try-finally, an exceptional coroutine termination automatically cancels children