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+Set Implicit Arguments.
+
+Generalizable All Variables.
+
+Parameter SpecializedCategory : Type -> Type.
+Parameter Object : forall obj, SpecializedCategory obj -> Type.
+
+Section SpecializedFunctor.
+ (* Variable objC : Type. *)
+ Context `(C : SpecializedCategory objC).
+
+ Polymorphic Record SpecializedFunctor := {
+ ObjectOf' : objC -> Type;
+ ObjectC : Object C
+ }.
+End SpecializedFunctor.
+
+Section FunctorInterface.
+ Variable objC : Type.
+ Variable C : SpecializedCategory objC.
+ Variable F : SpecializedFunctor C.
+
+ Set Printing All.
+ Set Printing Universes.
+ Check @ObjectOf' objC C F. (* Toplevel input, characters 24-25:
+Error:
+In environment
+objC : Type (* Top.515 *)
+C : SpecializedCategory objC
+F : @SpecializedFunctor (* Top.516 *) objC C
+The term "F" has type "@SpecializedFunctor (* Top.516 *) objC C"
+ while it is expected to have type
+ "@SpecializedFunctor (* Top.519 Top.520 *) objC C". *)