I'm getting an error in which I cannot tell if it's a result of a
bug or just a badly written query on my part.  Here is my query:

var q = from student in Session.Linq<Student>()
          from user in Session.Linq<User>()
          select student;

The Employee poco has a foreign key reference to a table containing
PersonInformation.  The error I am getting is this:

Unable to cast object of type
'System.Linq.Expressions.ConstantExpression' to type
'System.Linq.Expressions.LambdaExpression'.

This exception is being thrown as a result of the following logic in
the HandleSelectManyCall method of the RootVisitor class :

//get the association path for the joined entity
var collectionSelector = (LambdaExpression)LinqUtil.StripQuotes
(call.Arguments[1]);

Apparently, for my query, LinqUtil.StripQuotes(call.Arguments[1]);
returns a ConstantExpression instead of the LambdaExpression that the
above code assumes it will be.  Any ideas?

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