supervisorScope и упавший ребёнок

import kotlinx.coroutines.*

fun main() = runBlocking {
    val handler = CoroutineExceptionHandler { _, e -> println("handled ${e.message}") }
    supervisorScope {
        launch(handler) { error("A failed") }
        launch {
            delay(100)
            println("B done")
        }
    }
    println("end")
}