From c126601135c9d47d903948e55ef3b568331b9af7 Mon Sep 17 00:00:00 2001
From: Robbert Krebbers <mail@robbertkrebbers.nl>
Date: Tue, 23 Mar 2021 15:27:48 +0100
Subject: [PATCH] Fix by @mattam82 for
 https://github.com/coq/coq/pull/13952#issuecomment-804943880

---
 theories/fin_maps.v | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/theories/fin_maps.v b/theories/fin_maps.v
index aa75c29d..694b9ec0 100644
--- a/theories/fin_maps.v
+++ b/theories/fin_maps.v
@@ -977,8 +977,8 @@ Qed.
 
 Global Instance map_eq_dec_empty {A} (m : M A) : Decision (m = ∅) | 20.
 Proof.
-  refine (cast_if (decide (elements m = [])));
-    [apply _|by rewrite <-?map_to_list_empty' ..].
+  refine (cast_if (decide (map_to_list m = [])));
+    by rewrite <-?map_to_list_empty'.
 Defined.
 
 (** Properties of the imap function *)
-- 
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