Exception handling with launch coroutine and exception handler

launchExceptionHandler.kt

private val exceptionHandler: CoroutineContext = CoroutineExceptionHandler { _, throwable ->
    alertWithOkButton("Exception caught inside the exception handler")
    throwable.printStackTrace()
}

private fun getAllUsers() {
    launch(parentJob + UI + exceptionHandler) {
        val listOfUsers = run(CommonPool) {
            RestClient.apiDefinition.listUsers().execute()
        }

        val numberOfUsers = "number of users ${listOfUsers.body()?.size}"
        numberOfUsersTextView.text = numberOfUsers
    }
}