xunit runner hanging after all tests ran/failed/skipped

output.txt

xUnit.net DNX Runner (64-bit DNX 4.5.1)
  Discovering: fake-dnx.tests
  Discovered:  fake-dnx.tests
  Starting:    fake-dnx.tests
    fake_dnx.tests.HomeControllerTests.TestingTheDnxTestCommand [FAIL]
      Assert.True() Failure
      Expected: True
      Actual:   False
      Stack Trace:
          at fake_dnx.tests.HomeControllerTests.TestingTheDnxTestCommand () [0x00000] in <filename unknown>:0 
          at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
          at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
  Finished:    fake-dnx.tests
=== TEST EXECUTION SUMMARY ===
   fake-dnx.tests  Total: 2, Errors: 0, Failed: 1, Skipped: 0, Time: 0.555s

stack.txt

"<unnamed thread>" tid=0x0x7f36733fe700 this=0x0x7f3673906580 thread handle 0x4b5 state : waiting on 0x4b3 : Event  owns ()                                             
  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) System.Threading.WaitHandle.WaitOne_internal (System.Threading.WaitHandle,intptr,int,bool) <0xffffffff>
  at System.Threading.WaitHandle.WaitOne () <0x0005c>
  at Xunit.Sdk.XunitWorkerThread.Join () <0x0001a>
  at Xunit.Sdk.MaxConcurrencySyncContext.Dispose () <0x0007f>
  at Xunit.Sdk.XunitTestAssemblyRunner.Dispose () <0x00025>
  at Xunit.Sdk.XunitTestFrameworkExecutor/<RunTestCases>d__6.MoveNext () <0x00298>
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore/MoveNextRunner.InvokeMoveNext (object) <0x000be>
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object) <0x0009b>
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) <0x00016>
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore/MoveNextRunner.Run () <0x000ca>
  at System.Threading.Tasks.SynchronizationContextAwaitTaskContinuation.<s_postCallback>m__0 (object) <0x0003c>
  at Xunit.Sdk.MaxConcurrencySyncContext.RunOnSyncContext (System.Threading.SendOrPostCallback,object) <0x0005a>
  at Xunit.Sdk.MaxConcurrencySyncContext/<>c__DisplayClass11_0.<WorkerThreadProc>b__0 (object) <0x0002f>
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object) <0x0009b>
  at (wrapper dynamic-method) object.lambda_method (System.Runtime.CompilerServices.Closure,object,object) <0x00061>
  at Xunit.Sdk.ExecutionContextHelper.Run (object,System.Action`1<object>) <0x00042>
  at Xunit.Sdk.MaxConcurrencySyncContext.WorkerThreadProc () <0x001a7>
  at Xunit.Sdk.XunitWorkerThread/<>c.<QueueUserWorkItem>b__5_0 (object) <0x00052>
  at System.Threading.Tasks.Task.InnerInvoke () <0x00085>
  at System.Threading.Tasks.Task.Execute () <0x00046>
  at System.Threading.Tasks.Task.ExecutionContextCallback (object) <0x0004e>
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object) <0x0009b>
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) <0x00016>
  at System.Threading.Tasks.Task.ExecuteWithThreadLocal (System.Threading.Tasks.Task&) <0x00109>
  at System.Threading.Tasks.Task.ExecuteEntry (bool) <0x000f1>
  at System.Threading.Tasks.ThreadPoolTaskScheduler.LongRunningThreadWork (object) <0x00050>
  at System.Threading.Thread.StartInternal () <0x000f6>
  at (wrapper runtime-invoke) object.runtime_invoke_void__this__ (object,intptr,intptr,intptr) <0xffffffff>