From cd4f46247dcd6843e416a1f4dff38473c50f8a91 Mon Sep 17 00:00:00 2001
From: Roman Khimov <roman@nspcc.ru>
Date: Fri, 1 Jul 2022 21:49:40 +0300
Subject: [PATCH] consensus: make double-call to Shutdown a no-op

---
 pkg/consensus/consensus.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkg/consensus/consensus.go b/pkg/consensus/consensus.go
index dfdb8539b..8e1b5ad32 100644
--- a/pkg/consensus/consensus.go
+++ b/pkg/consensus/consensus.go
@@ -274,7 +274,7 @@ func (s *service) Start() {
 
 // Shutdown implements the Service interface.
 func (s *service) Shutdown() {
-	if s.started.Load() {
+	if s.started.CAS(true, false) {
 		close(s.quit)
 		<-s.finished
 	}