ArgumentNullException when loading object in NestedUnitOfWork

We receive a ArgumentNullException when we try to load an object into a nested unit of work. We found that it is caused by a null (loaded) delayed property on the original object (before loading it into the the nested unit of work).

Steps to Reproduce:

Run test app. You'll receive a ArgumentNullException when the GetNestedObject method is call.

Actual Results:

System.ArgumentNullException was unhandled

  Message="Value cannot be null.\r\nParameter name: theObject"

  Source="DevExpress.Xpo.v8.2"

  ParamName="theObject"

  StackTrace:

       at DevExpress.Xpo.Metadata.XPDictionary.GetClassInfo(Object theObject)

       at DevExpress.Xpo.Session.IsNewObject(Object theObject)

       at DevExpress.Xpo.Helpers.NestedLoader.CloneData(Object source, Object destination)

       at DevExpress.Xpo.Helpers.NestedLoader.CloneObjects(IList& toFireLoaded)

       at DevExpress.Xpo.Helpers.NestedLoader.GetNestedObjects(ICollection[] parentObjects)

       at DevExpress.Xpo.Helpers.NestedLoader.GetNestedObject(Object parentObject)

       at DevExpress.Xpo.NestedUnitOfWork.GetNestedObject(Object obj)

       at DevExpress.Xpo.NestedUnitOfWork.GetNestedObject[T](T obj)

       at TestGetNestedObjectBug.Program.Main(String[] args) in C:\AATemp\Tests\TestGetNestedObjectBug\Program.cs:line 35

       at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)

       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)

       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()

       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)

       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

       at System.Threading.ThreadHelper.ThreadStart()

Expected Results:

No exception in this scenario and that the object is loaded into the nested unit of work.