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diff --git a/test-suite/bugs/closed/shouldsucceed/1776.v b/test-suite/bugs/closed/shouldsucceed/1776.v
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+++ b/test-suite/bugs/closed/shouldsucceed/1776.v
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+Axiom pair : nat -> nat -> nat -> Prop.
+Axiom pl : (nat -> Prop) -> (nat -> Prop) -> (nat -> Prop).
+Axiom plImpR : forall k P Q,
+  pl P Q k -> forall (Q':nat -> Prop),
+    (forall k', Q k' -> Q' k') ->
+    pl P Q' k.
+
+Definition nexists (P:nat -> nat -> Prop) : nat -> Prop :=
+  fun k' => exists k, P k k'.
+
+Goal forall a A m,
+  True ->
+  (pl A (nexists (fun x => (nexists 
+    (fun y => pl (pair a (S x)) (pair a (S y))))))) m.
+Proof.
+  intros.
+  eapply plImpR; [ | intros; econstructor; econstructor; eauto].
+  clear H;
+    match goal with
+       | |- (pl _ (pl (pair _ ?x) _)) _ => replace x with 0
+    end.
+Admitted.