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+(* -*- coq-prog-args: ("-emacs" "-require" "Coq.Compat.Coq84" "-compat" "8.4") -*- *)
+Require Import Coq.Lists.List Coq.Logic.JMeq Program.Equality.
+Set Printing Universes.
+Inductive Foo (I : Type -> Type) (A : Type) : Type :=
+| foo (B : Type) : A -> I B -> Foo I A.
+Definition Family := Type -> Type.
+Definition FooToo : Family -> Family := Foo.
+Definition optionize (I : Type -> Type) (A : Type) := option (I A).
+Definition bar (I : Type -> Type) (A : Type) : A -> option (I A) -> Foo(optionize I) A := foo (optionize I) A A.
+Record Rec (I : Type -> Type) := { rec : forall A : Type, A -> I A -> Foo I A }.
+Definition barRec : Rec (optionize id) := {| rec := bar id |}.
+Inductive Empty {T} : T -> Prop := .
+Theorem empty (family : Family) (a : fold_right prod unit (map (Foo family)
+nil)) (b : unit) :
+  Empty (a, b) -> False.
+Proof.
+  intro e.
+  dependent induction e.
+Qed.