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(************************************************************************)
(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(*   \VV/  **************************************************************)
(*    //   *      This file is distributed under the terms of the       *)
(*         *       GNU Lesser General Public License Version 2.1        *)
(************************************************************************)

Fixpoint F (n:nat) : False := F (match F n with end).

(* de Bruijn mix-up *)
(* If accepted, Eval compute in f 0. loops *)
Definition f :=
  let f (f1 f2:nat->nat) := f1 in
  let _ := 0 in
  let _ := 0 in
  let g (f1 f2:nat->nat) := f2 in
  let h := f in (* h = Rel 4 *)
  fix F (n:nat) : nat :=
  h F S n. (* here Rel 4 = g *)