Custom Coroutine Scope

custom_coroutine_scope.kt

fun main() = runBlocking{
    launchChildren()
    println("never gets printed") // this line never gets printed 
}

suspend fun launchChildren(): Int = coroutineScope {
    val first = async {
        try {
            firstValue()
        } finally {
            println("got cancelled")
        }
    }
    val second = async { secondValue() }

    first.await() + second.await()
}

suspend fun firstValue(): Int {
    delay(300)
    return 10
}

suspend fun secondValue(): Int {
    delay(250)
    throw(ArithmeticException("error occurred"))
}

//console output
got cancelled
Exception in thread "main" java.lang.ArithmeticException: error occurred