```private val supervisor = SupervisorJob() private val coroutineScope = CoroutineScope(coroutineCon...

# coroutines

[jean]

private val supervisor = SupervisorJob()
private val coroutineScope = CoroutineScope(coroutineContext + supervisor)
...
fun onEvent(event: MyEvent) {
    coroutineScope.launch {
        val data = findHeavyWorkToExecute()?.invoke()
            ?: throw Exception(currentState, event)

        someMoreWork(data)
     }
}

I’m want someMoreWork() to be executed only if the lambda returned by findHeavyWorkToExecute() is not null and its execution does not fail. But when I test this someMoreWork() is called even though the throw statement occurs. What am I suppose to change there?

[wasyl]

Do you use new JVM IR backend perhaps?

[jean]

no I didn’t updated yet

[wasyl]

Are you sure findHeavyWorkToExecute()?.invoke() returns null?

This simple test doesn’t print anything:

private val coroutineScope = CoroutineScope(SupervisorJob())

@Test
fun test(): Unit = runBlocking {
    coroutineScope.launch {
        val data = findSomeHeavyWork() ?: throw Exception()

        println("after stuff")
    }

    delay(1000)
}

fun findSomeHeavyWork(): Unit? = null

[jean]

you are right, I just realized it was the lambda execution that was failing inside a try/catch and returning an error rather than the lambda being null 🤦 thanks for the help!