Failure when parameterized Mock.Of<> is used in query comprehension from clause

[stakx]

Reproduction code:

public interface IX
{
    int N { get; }
}

(from x1 in Mocks.Of<IX>(_ => _.N == 1)
 from __ in Mocks.Of<IX>(_ => _.N == 2)
 select x1)
.First()

Actual behavior:

In current master (71d66d0), query execution produces an assertion failure at this line of code:

   at Moq.ExpressionExtensions.<Split>g__Split|5_0(Expression e, Expression& r, InvocationShape& p) in …\src\Moq\ExpressionExtensions.cs:line 234
   at Moq.ExpressionExtensions.Split(LambdaExpression expression) in …\src\Moq\ExpressionExtensions.cs:line 148
   at Moq.Mock.SetupRecursive[TSetup](Mock mock, LambdaExpression expression, Func`3 setupLast) in …\src\Moq\Mock.cs:line 591
   at Moq.Mock.Setup(Mock mock, LambdaExpression expression, Condition condition) in …\src\Moq\Mock.cs:line 528
   at Moq.Mocks.SetupReturns(Mock mock, LambdaExpression expression, Object value) in …\src\Moq\Linq\Mocks.cs:line 194
   at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()
   at System.Linq.Enumerable.SelectManyIterator[TSource,TCollection,TResult](IEnumerable`1 source, Func`2 collectionSelector, Func`3 resultSelector)+MoveNext()
   at System.Linq.Enumerable.TryGetFirst[TSource](IEnumerable`1 source, Boolean& found)
   at System.Linq.Enumerable.First[TSource](IEnumerable`1 source)
   at System.Linq.EnumerableExecutor`1.Execute()
   at System.Linq.EnumerableQuery`1.System.Linq.IQueryProvider.Execute[TElement](Expression expression)
   at System.Linq.Queryable.First[TSource](IQueryable`1 source)
   at Moq.Linq.MockQueryable`1.Execute[TResult](Expression expression) in …\src\Moq\Linq\MockQuery.cs:line 79
   at System.Linq.Queryable.First[TSource](IQueryable`1 source)
   at …

Or, in a release build (where these assertions are disabled), this exception gets thrown:

System.NotSupportedException: Unsupported expression: ... => Mocks.SetupReturns(..., x => x.N, (object)2)
Static members (here: Mocks.SetupReturns) may not be used in setup / verification expressions.
   at Moq.Guard.IsOverridable(MethodInfo method, Expression expression) in …\src\Moq\Guard.cs:line 89
   at Moq.InvocationShape..ctor(LambdaExpression expression, MethodInfo method, IReadOnlyList`1 arguments, Boolean exactGenericTypeArguments) in …\src\Moq\InvocationShape.cs:line 45
   at Moq.ExpressionExtensions.<Split>g__Split|5_0(Expression e, Expression& r, InvocationShape& p) in …\src\Moq\ExpressionExtensions.cs:line 241
   at Moq.ExpressionExtensions.Split(LambdaExpression expression) in …\src\Moq\ExpressionExtensions.cs:line 149
   at Moq.Mock.Setup(Mock mock, LambdaExpression expression, Condition condition) in …\src\Moq\Mock.cs:line 528
   at Moq.Mocks.SetupReturns(Mock mock, LambdaExpression expression, Object value) in …\src\Moq\Linq\Mocks.cs:line 205
   at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()
   at System.Linq.Enumerable.SelectManyIterator[TSource,TCollection,TResult](IEnumerable`1 source, Func`2 collectionSelector, Func`3 resultSelector)+MoveNext()
   at System.Linq.Enumerable.TryGetFirst[TSource](IEnumerable`1 source, Boolean& found)
   at System.Linq.Enumerable.First[TSource](IEnumerable`1 source)
   at System.Linq.EnumerableExecutor`1.Execute()
   at System.Linq.EnumerableQuery`1.System.Linq.IQueryProvider.Execute[TElement](Expression expression)
   at System.Linq.Queryable.First[TSource](IQueryable`1 source)
   at System.Linq.Queryable.First[TSource](IQueryable`1 source)
   at …

Or, using the most recent NuGet package (version 4.13.1), :

System.NotSupportedException: The equals ("==" or "=" in VB) and the conditional 'and' ("&&" or "AndAlso" in VB) operators are the only ones supported in the query specification expression. Unsupported expression: Mock.Get<IX>(x).Setup<int>(mock => mock.N).Returns(2) != null
   at Moq.Linq.MockSetupsBuilder.VisitBinary(BinaryExpression node)
   at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at System.Linq.Expressions.ExpressionVisitor.VisitLambda[T](Expression`1 node)
   at System.Linq.Expressions.Expression`1.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at System.Linq.Expressions.ExpressionVisitor.VisitUnary(UnaryExpression node)
   at System.Linq.Expressions.UnaryExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at System.Dynamic.Utils.ExpressionVisitorUtils.VisitArguments(ExpressionVisitor visitor, IArgumentProvider nodes)
   at System.Linq.Expressions.ExpressionVisitor.VisitMethodCall(MethodCallExpression node)
   at Moq.Linq.MockSetupsBuilder.VisitMethodCall(MethodCallExpression node)
   at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
   at Moq.Linq.MockQueryable`1.Execute[TResult](Expression expression)
   at Moq.Linq.MockQueryable`1.GetEnumerator()
   at System.Linq.Enumerable.SelectManyIterator[TSource,TCollection,TResult](IEnumerable`1 source, Func`2 collectionSelector, Func`3 resultSelector)+MoveNext()
   at System.Linq.Enumerable.TryGetFirst[TSource](IEnumerable`1 source, Boolean& found)
   at System.Linq.Enumerable.First[TSource](IEnumerable`1 source)
   at System.Linq.EnumerableExecutor`1.Execute()
   at System.Linq.EnumerableQuery`1.System.Linq.IQueryProvider.Execute[TElement](Expression expression)
   at System.Linq.Queryable.First[TSource](IQueryable`1 source)
   at System.Linq.Queryable.First[TSource](IQueryable`1 source)
   at …

It looks like the expression tree gets analysed by Moq's expression splitting routine instead of simply being compiled and executed.

Expected behavior:

In analogy to a LINQ query expression of the general form:

(from x in xs
 from _ in …
 select x)
.First()

which would yield xs.First(), I'd expect the above query to yield an IX where .N == 1.