Another important use of the coroutine context is to define behavior for uncaught exceptions. This type of context can be created by implementing CoroutineExceptionHandler, as follows:

fun main(args: Array<String>) = runBlocking {
    val handler = CoroutineExceptionHandler({ context, throwable ->
        println("Error captured in $context")
        println("Message: ${throwable.message}")
    })

    launch(handler) {
        TODO("Not implemented yet!")
    }

    // wait for the error to happen
    delay(500)
}

In this example, we are creating a CoroutineExceptionHandler that prints the information of an uncaught exception. Then we start a coroutine that will throw an exception and give the application some time to print the message.

The application will then handle the exception gracefully: