From d2c226e769c48e2ac67baaa776d3cd6400f4524e Mon Sep 17 00:00:00 2001
From: Ralf Jung <jung@mpi-sws.org>
Date: Mon, 27 Sep 2021 11:52:14 -0400
Subject: [PATCH] prepare for f_equiv change

---
 iris_heap_lang/proofmode.v | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/iris_heap_lang/proofmode.v b/iris_heap_lang/proofmode.v
index 2d78d4319..9d44d43ee 100644
--- a/iris_heap_lang/proofmode.v
+++ b/iris_heap_lang/proofmode.v
@@ -473,7 +473,7 @@ Lemma tac_twp_cmpxchg_fail Δ s E i K l q v v1 v2 Φ :
 Proof.
   rewrite envs_entails_eq. intros. rewrite -twp_bind.
   eapply wand_apply; first exact: twp_cmpxchg_fail.
-  rewrite envs_lookup_split //=. by do 2 f_equiv.
+  rewrite envs_lookup_split //=. simpl. by do 2 f_equiv.
 Qed.
 
 Lemma tac_wp_cmpxchg_suc Δ Δ' s E i K l v v1 v2 Φ :
-- 
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