Calling First() or FirstOrDefault() within a Select function should throw InvalidOperationException

[hmobius]

If you call either of

var db = Database.Open().Albums.Select(db.Albums.First());
var db = Database.Open().Albums.Select(db.Albums.FirstOrDefault());

You get a NullReferenceException thrown back. If you call

var db = Database.Open().Albums.All().Select(db.Albums.First());
var db = Database.Open().Albums.All().Select(db.Albums.FirstOrDefault());

You get an InvalidOperationException thrown back. Suggest that both calls should throw an InvalidOperationException.

[hmobius]

Applies also to Single() and SingleOrDefault()

[markrendle]

Fixed.