```fun main() = runBlocking { repeat(50) { launch(<http://Dispatchers.IO|Dispatchers.IO>...

# coroutines

[jeggy]

fun main() = runBlocking {
    repeat(50) {
        launch(<http://Dispatchers.IO|Dispatchers.IO>) {
            delay(5000L * it)
            println("Done $it")
        }
    }
}

Having some code like this. Is it possible to leak coroutines, if I were to just send the kill signal to this process?

[spand]

If you kill the process all coroutines must be gone by definition ?

[Zach Klippenstein (he/him) [MOD]]

You couldn't even leak threads like this, and coroutines are an entirely userspace construct.

[jeggy]

Great, thanks. Just wanted to be 100% sure 😛
Cause when creating a test like this:

@Test
fun threads() = runBlockingTest {
    (1..50).map {
        launch(<http://Dispatchers.IO|Dispatchers.IO>) {
            delay(5000L * it)
            println("Done $it")
        }
    }.joinAll()
}

The test will fail, so just wanted to be sure if that wasn't leaked anywhere.

To ask a new question, what's the reason for that specific test failing?

[uli]

what does it say?

[jeggy]

java.lang.IllegalStateException: This job has not completed yet

[tseisel]

This is a known bug of runBlockingTest, it seems that using another dispatcher conflicts with the auto-advancing time feature. You may reproduce the same problem with withContext