``` fun main(args: Array<String>) = runBlocking<Unit> { try { failedConcurre...

# coroutines

[mayojava]

fun main(args: Array<String>) = runBlocking<Unit> {
    try {
        failedConcurrentSum()
    } catch(e: ArithmeticException) {
        println("Computation failed with ArithmeticException")
    }
}

suspend fun failedConcurrentSum(): Int = coroutineScope {
    val one = async<Int> { 
        try {
            delay(Long.MAX_VALUE) // Emulates very long computation
            42
        } finally {
            println("First child was cancelled")
        }
    }
    val two = async<Int> { 
        println("Second child throws an exception")
        throw ArithmeticException()
    }
        one.await() + two.await()
}

it doesnt seem to work for me. The parent coroutine still blocks waiting for the first async after the second threw the exception

[Vsevolod Tolstopyatov [JB]]

Have you updated your coroutines version to 0.30.1?

[Dico]

The reason is that the two coroutine doesn't throw its exception until you call two.await() which doesn't occur until one.await() returns.

[Dico]

If the exception thrown by two is supposed to cancel the parent before await() is called then I guess I don't know.

[Vsevolod Tolstopyatov [JB]]

@Dico this behaviour was changed in the latest realese