Inconsistent exception handling in NancyFx module pipeline

gistfile1.cs

using System;
using Nancy;
using Nancy.Testing;
using NUnit.Framework;
using SharpTestsEx;

namespace StackOverflowExample.Nancy
{
    [TestFixture]
    public sealed class ModuleOnError
    {
        [Test]
        public void Module_and_application_errorHooks_should_capture_same_exception()
        {
            var errorModule = new ErrorModule();
            Exception applicationException = null;
            var browser = new Browser(with =>
            {
                with.Module(errorModule);
                with.ApplicationStartup(
                    (container, pipelines) => pipelines.OnError.AddItemToStartOfPipeline((context, exception) =>
                    {
                        applicationException = exception;
                        return Response.NoBody;
                    }));
            });

            browser.Get("/");

            // This fails, as errorModule.ModuleException is unwrapped AggregateException
            applicationException.Should().Be.SameInstanceAs(errorModule.ModuleException);
        }
    }

    public sealed class ErrorModule : NancyModule
    {
        public Exception ModuleException { get; private set; }

        public ErrorModule()
        {
            OnError.AddItemToStartOfPipeline((context, exception) =>
            {
                ModuleException = exception;
                return null;
            });

            Get["/"] = _ =>
            {
                throw new SomeException();
            };
        }
    }

    sealed class SomeException : Exception
    {
    }
}