machine.specifications: ArgumentOutOfRangeException when running tests

Hi

I am running MSpec 0.8.0 NuGet package and using ReSharper 8.2. When running my tests I get a popup window in Visual Studio saying:

Unit Test Runner failed to run tests

System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: chunkLength
   at System.Text.StringBuilder.ToString()
   at System.IO.StringWriter.ToString()

The same issue happens on TeamCIty which is using the mspec-clr4.exe to run the tests. The test running stops after about 20 tests and the build still passes.

Let me know if you need any more info

Thanks Neil