``` @Test fun coroutineTest() { ru...

# coroutines

[dariuszbacinski]

@Test
    fun coroutineTest() {
        runBlocking {
            flowOf("any").map {
                val result = ioFunction() //crash java.lang.ClassCastException: kotlin.coroutines.intrinsics.CoroutineSingletons cannot be cast to java.util.Map
                result
            }.collect { result ->
                Log.v("$result")
            }
        }
    }

    suspend fun ioFunction(): Map<Long, Int> = withContext(<http://Dispatchers.IO|Dispatchers.IO>) {
        mapOf(1L to 4)
    }

how can is use suspend function in when mapping Flow? above code crashes, but it works when I remove suspend function and use normal blocking function

[dariuszbacinski]

should I use different operator then map?

[octylFractal]

that looks like a bug in the compiler, should be fine code except you should use delay and not sleep

[octylFractal]

the CCE would be coming from the COROUTINE_SUSPENDED internal value being leaked

[dariuszbacinski]

removed sleep it doesn't matter here

[dariuszbacinski]

https://github.com/Kotlin/kotlinx.coroutines/issues/1091 is this this issue?

[dariuszbacinski]

I am using kotlin_version = '1.3.21'

[octylFractal]

yes, probably

[dariuszbacinski]

It works with 1.3.50, thank you ✔️