practical_coroutines_20.kt

val eh = CoroutineExceptionHandler { _, throwable ->
    println("Oops error occured: ${throwable.localizedMessage}")
}

// Crashes the main thread since top most launch doesn't 
// handle exception even if child coroutine does
launch {
	delay(100)
    launch(eh) {
		throw Exception("I failed")
    }
}

// Doesn't crashes the main thread and the exception is caught
launch(eh) {
   delay(100)
   launch {
   		throw Exception("I failed")
   }
}