Cannot debug unit tests written with TypeMock

An unhandled exception of type 'System.ApplicationException' occurred in nunit.core.dll

Additional information: Exception in pump thread

using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;
using NUnit.Util;
using NUnit.Core;
using NUnit.Framework;
using TypeMock;

namespace TypeMockBugRepro
{
   public class Program
   {
      static void Main(String[] args)
      {
         NUnitTestRunner.RunAllTests(Assembly.GetEntryAssembly());
      }
   }

   [TestFixture]
   [ClearMocks]
   public class Tests
   {
      public int FunctionToMock(int i)
      {
         return 1;
      }

      public int Function(int i)
      {
         return FunctionToMock(i);
      }

      [Test]
      [VerifyMocks]
      public void ExampleTest()
      {
         using (RecordExpectations recorder = RecorderManager.StartRecording())
         {
            FunctionToMock(2);
            recorder.CheckArguments();
            recorder.Return(2);
         }
         Assert.AreEqual(2, Function(2));
      }

   }

   public static class NUnitTestRunner
   {
      public static void RunAllTests(Assembly assembly)
      {
         string assemblyName = assembly.Location;

         TestDomain testDomain = new TestDomain();
         NUnitProject project = NUnitProject.FromAssembly(assemblyName);

         TestPackage testPackage = project.MakeTestPackage();
         testDomain.Load(testPackage);

         FailingTestReporter listener = new FailingTestReporter();
         TestResult result = testDomain.Run(listener);
      }
   }

   public class FailingTestReporter : MarshalByRefObject, EventListener
   {
      public void RunFinished(Exception exception) { }
      public void RunFinished(TestResult result) { }
      public void RunStarted(string name, int testCount) { }
      public void SuiteFinished(TestSuiteResult result) { }
      public void SuiteStarted(TestName testName) { }
      public void TestOutput(TestOutput testOutput) { }
      public void TestStarted(TestName testName) { }
      public void UnhandledException(Exception exception) { }
      public void TestFinished(TestCaseResult result) {}
   }   
}