Make sure that anonymous hypotheses do not use some random old name.

theories/base_logic/lib/wsat.v

@@ -104,7 +104,7 @@ Qed.
 Lemma ownI_open i P : wsat ∗ ownI i P ∗ ownE {[i]} ⊢ wsat ∗ ▷ P ∗ ownD {[i]}.
 Proof.
   rewrite /ownI /wsat -!lock.
-  iIntros "(Hw & Hi & HiE)". iDestruct "Hw" as (I) "[? HI]".
+  iIntros "(Hw & Hi & HiE)". iDestruct "Hw" as (I) "[Hw HI]".
   iDestruct (invariant_lookup I i P with "[$]") as (Q ?) "#HPQ".
   iDestruct (big_opM_delete _ _ i with "HI") as "[[[HQ $]|HiE'] HI]"; eauto.
   - iSplitR "HQ"; last by iNext; iRewrite -"HPQ".
@@ -115,7 +115,7 @@ Qed.
 Lemma ownI_close i P : wsat ∗ ownI i P ∗ ▷ P ∗ ownD {[i]} ⊢ wsat ∗ ownE {[i]}.
 Proof.
   rewrite /ownI /wsat -!lock.
-  iIntros "(Hw & Hi & HP & HiD)". iDestruct "Hw" as (I) "[? HI]".
+  iIntros "(Hw & Hi & HP & HiD)". iDestruct "Hw" as (I) "[Hw HI]".
   iDestruct (invariant_lookup with "[$]") as (Q ?) "#HPQ".
   iDestruct (big_opM_delete _ _ i with "HI") as "[[[HQ ?]|$] HI]"; eauto.
   - iDestruct (ownD_singleton_twice with "[$]") as %[].
@@ -128,7 +128,7 @@ Lemma ownI_alloc φ P :
   wsat ∗ ▷ P ==∗ ∃ i, ⌜φ i⌝ ∗ wsat ∗ ownI i P.
 Proof.
   iIntros (Hfresh) "[Hw HP]". rewrite /wsat -!lock.
-  iDestruct "Hw" as (I) "[? HI]".
+  iDestruct "Hw" as (I) "[Hw HI]".
   iMod (own_unit (gset_disjUR positive) disabled_name) as "HE".
   iMod (own_updateP with "[$]") as "HE".
   { apply (gset_disj_alloc_empty_updateP_strong' (λ i, I !! i = None ∧ φ i)).
@@ -150,7 +150,7 @@ Lemma ownI_alloc_open φ P :
   (∀ E : gset positive, ∃ i, i ∉ E ∧ φ i) →
   wsat ==∗ ∃ i, ⌜φ i⌝ ∗ (ownE {[i]} -∗ wsat) ∗ ownI i P ∗ ownD {[i]}.
 Proof.
-  iIntros (Hfresh) "Hw". rewrite /wsat -!lock. iDestruct "Hw" as (I) "[? HI]".
+  iIntros (Hfresh) "Hw". rewrite /wsat -!lock. iDestruct "Hw" as (I) "[Hw HI]".
   iMod (own_unit (gset_disjUR positive) disabled_name) as "HD".
   iMod (own_updateP with "[$]") as "HD".
   { apply (gset_disj_alloc_empty_updateP_strong' (λ i, I !! i = None ∧ φ i)).

theories/heap_lang/lib/ticket_lock.v

@@ -153,7 +153,7 @@ Section proof.
     wp_store.
     iDestruct (own_valid_2 with "Hauth Hγo") as
       %[[<-%Excl_included%leibniz_equiv _]%prod_included _]%auth_valid_discrete_2.
-    iDestruct "Haown" as "[[Hγo' _]|?]".
+    iDestruct "Haown" as "[[Hγo' _]|Haown]".
     { iDestruct (own_valid_2 with "Hγo Hγo'") as %[[] ?]. }
     iMod (own_update_2 with "Hauth Hγo") as "[Hauth Hγo]".
     { apply auth_update, prod_local_update_1.

theories/proofmode/tactics.v

@@ -858,7 +858,11 @@ Tactic Notation "iModCore" constr(H) :=
 Local Tactic Notation "iDestructHyp" constr(H) "as" constr(pat) :=
   let rec go Hz pat :=
     lazymatch pat with
-    | IAnom => idtac
+    | IAnom =>
+       lazymatch Hz with
+       | IAnon _ => idtac
+       | INamed ?Hz => let Hz' := iFresh in iRename Hz into Hz'
+       end
     | IDrop => iClearHyp Hz
     | IFrame => iFrameHyp Hz
     | IIdent ?y => iRename Hz into y