Uncaught basicReturn

[acacio]

I'm writing a small test and, when there are no subscribers in the exchange while using mandatory delivery mode, I get an an uncaught exception, despite me catching that event.

Code snippets

var msgDeliveryOptions = {
    mandatory: true,
    deliveryMode: 2          // persistent = 2, non-persistent = 1
};

var exchange = connection.exchange('acacio.topic', null, function(e) { util.puts(e.name); });
exchange.publish('test', msg, msgDeliveryOptions);
exchange.on('basicReturn', exchangeError);

function exchangeError(err) {
  util.puts(JSON.stringify(err, null, 2));
  util.puts('I got it!');
}

OUTPUT:

{
  "replyCode": 312,
  "replyText": "NO_ROUTE",
  "exchange": "acacio.topic",
  "routingKey": "test"
}
I got it!
Warning: Uncaught basicReturn: {"replyCode":312,"replyText":"NO_ROUTE","exchange":"acacio.topic","routingKey":"test"}