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(* Check evar-evar unification *)
Inductive T (A: Set): Set := mkT: unit -> T A.
Definition f (A: Set) (l: T A): unit := tt.
Arguments f [A].
Lemma L (x: T unit): (unit -> T unit) -> unit.
Proof.
refine (match x return _ with mkT _ n => fun g => f (g _) end).
trivial.
Qed.
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