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diff --git a/test-suite/bugs/closed/4596.v b/test-suite/bugs/closed/4596.v
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+Require Import Coq.Setoids.Setoid Coq.Classes.Morphisms.
+
+Definition T (x : bool) := x = true.
+
+Goal forall (S : Type) (b b0 : S -> nat -> bool) (str : S) (p : nat)
+  (s : forall n : nat, bool)
+  (s0 s1 : nat -> S -> S),
+  (forall (str0 : S) (n m : nat),
+  (if s m then T (b0 (s1 n str0) 0) else T (b (s1 n str0) 0)) -> T (b (s0 n str0) m) ->
+    T (b str0 m)) ->
+  T (b str p).
+Proof.
+intros ???????? H0.
+rewrite H0.