[nhibernate-issues] [NHJIRA] Created: (NH-2690) Linq Select() broken with .ToFuture()

[Kelly S. (JIRA) <nh...@gm...>]

Linq Select() broken with .ToFuture()
-------------------------------------

                 Key: NH-2690
                 URL: http://216.121.112.228/browse/NH-2690
             Project:  NHibernate
          Issue Type: Bug
          Components: Linq Provider
    Affects Versions: 3.1.0
            Reporter: Kelly Stuard
            Priority: Major


//Given the following:
var query =
	from cat in session.Query<Cat>()
	select new
	{
		Id = cat.Id,
		Name = cat.Name,
	};

//This works:
var result1 = query.ToList();

//But this does not:
var queryResults = query.ToFuture().ToList();


Exception:

NHibernate.HibernateException was unhandled
  Message=Failed to execute multi query: [select cat0_.Id as col_0_0_, cat0_.Name as col_1_0_ from Cat cat0_;
]
  Source=NHibernate
  StackTrace:
       at NHibernate.Impl.MultiQueryImpl.DoList()
       at NHibernate.Impl.MultiQueryImpl.ListIgnoreQueryCache()
       at NHibernate.Impl.MultiQueryImpl.List()
       at NHibernate.Impl.FutureQueryBatch.GetResultsFrom(IMultiQuery multiApproach)
       at NHibernate.Impl.FutureBatch`2.GetResults()
       at NHibernate.Impl.FutureBatch`2.get_Results()
       at NHibernate.Impl.FutureBatch`2.GetCurrentResult[TResult](Int32 currentIndex)
       at NHibernate.Impl.FutureBatch`2.<>c__DisplayClass4`1.<GetEnumerator>b__3()
       at NHibernate.Impl.DelayedEnumerator`1.<get_Enumerable>d__0.MoveNext()
       at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
       at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
       at NHibernate.Test.NHSpecificTest.NH1234.SampleTest.ShouldBeAbleToFutureSelectOntoAnonymous() in C:\Users\kstuard\Desktop\NH2540\NHibernate.Test\NHSpecificTest\NH1234\SampleTest.cs:line 97
       at ConsoleApplication2.Program.Main(String[] args) in C:\Users\kstuard\Desktop\NH2540\ConsoleApplication2\Program.cs:line 16
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: System.ArgumentException
       Message=The value "System.Object[]" is not of type "<>f__AnonymousType0`2[System.Int32,System.String]" and cannot be used in this generic collection.
Parameter name: value
       Source=mscorlib
       ParamName=value
       StackTrace:
            at System.ThrowHelper.ThrowWrongValueTypeArgumentException(Object value, Type targetType)
            at System.Collections.Generic.List`1.System.Collections.IList.Add(Object item)
            at NHibernate.Impl.MultiQueryImpl.DoList()
       InnerException: 


This works fine if I select directly to typeof(Cat). Future is such a wonderful tool; it would be great if it worked in this scenario.

I will attach test cases used to generate this exception, shortly.

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