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+(* Testing a regression from 8.5beta1 to 8.5beta2 in evar-evar tactic unification problems *)
+
+
+Inductive test : nat -> nat -> nat -> nat -> Prop :=
+ | test1 : forall m n, test m n m n.
+
+Goal test 1 2 3 4.
+erewrite f_equal2 with (f := fun k l => test _ _ k l).