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Set Primitive Projections.
Set Implicit Arguments.
Set Universe Polymorphism.
Record category :=
{ ob : Type }.
Goal forall C, ob C -> ob C.
intros.
generalize dependent (ob C).
(* 1 subgoals, subgoal 1 (ID 7)
C : category
============================
forall T : Type, T -> T
(dependent evars:) *)
intros T t.
Undo 2.
generalize dependent (@ob C).
(* 1 subgoals, subgoal 1 (ID 6)
C : category
X : ob C
============================
Type -> ob C
(dependent evars:) *)
intros T t.
(* Toplevel input, characters 9-10:
Error: No product even after head-reduction. *)
Abort.
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