ArgumentNullException when sqlquery caching on NHibernate

Question

Environment: NHibernate 4.0.0.4000; NHibernate.Caches.SysCache 4.0.0.4000; Web MVC / API 4.5.1; FluentNHibernate 1.4.0.0; VS2013;

I am trying to cache an SQL query on nhibernate ( which works fine without caching ), as you can see:

        return Session.CreateSQLQuery(sql)
            .AddScalar("Id", NHibernateUtil.Int32)
            .AddScalar("Summary", NHibernateUtil.String)
            .SetResultTransformer(Transformers.AliasToBean<ProductDto>())
            .SetCacheable(true)
            //.SetCacheRegion("Long") throws same error regardless of this
            .List<ProductDto>()
            ;

but it continues to throw an ArgumentNullException, see details:

Value cannot be null.
Parameter name: source
  at System.Linq.Enumerable.Count[TSource](IEnumerable`1 source, Func`2 predicate)
   at NHibernate.Util.ArrayHelper.CountTrue(Boolean[] array)
   at NHibernate.Transform.CacheableResultTransformer.Create
   ...

I tried using a different caching provider, namely NHibernate.Caches.RtMemoryCache, but the error is the same.

In addition, no nhibernate information is logged after the call, since the error appears to occur in a very early state on its pipeline.

Cache Configuration Using Fluent NHibernate:

 (OracleClientConfiguration.Oracle10.ConnectionString(connStr).AdoNetBatchSize(20000)).Cache(c => c.ProviderClass<SysCacheProvider>().UseSecondLevelCache().UseQueryCache())

( , ):

INFO  2014-11-03 08:51:33,474 [1    ] NHibernate.Cache.StandardQueryCache      - starting query cache at region: NHibernate.Cache.StandardQueryCache

? , , ?

!