MassTransit creating 6 copies of an errored out message with RabbitMQ

gistfile1.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using MassTransit;

namespace JMMQConsoleApp
{
	class Program
	{
		public class YourMessage { public string Text { get; set; } }

		static void Main(string[] args)
		{
			Bus.Initialize(sbc =>
			{
				sbc.UseRabbitMqRouting();
				sbc.ReceiveFrom("rabbitmq://localhost/test_queue");
				sbc.Subscribe(subs =>
				{
					subs.Handler<YourMessage>(msg =>
					{
						throw new Exception("Bombing out intentionally.");
					});
				});
			});

			Bus.Instance.Publish(new YourMessage { Text = "Hi" });

			Console.ReadKey();
		}
	}
}