Hint Rewrite @closed_wrt_subst_eval_expr using solve [auto 50 with closed] : subst.
Hint Rewrite @closed_wrt_subst_eval_lvalue using solve [auto 50 with closed] : subst.
Hint Unfold closed_wrt_modvars : closed.

Lemma closed_wrtl_lift0: forall {A} S (Q: A), closed_wrt_lvars S (lift0 Q).
Hint Resolve closed_wrt_lift0 closed_wrtl_lift0 : closed.