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(* Use of idents bound to ltac names in a "match" *)
Definition foo : Type.
Proof.
let x := fresh "a" in
refine (forall k : nat * nat, let '(x, _) := k in (_ : Type)).
exact (a = a).
Defined.
Goal foo.
intros k. elim k. (* elim because elim keeps names *)
intros.
Check a. (* We check that the name is "a" *)
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