From b84afb5753c50e26c8c1e81061a81316dbff6638 Mon Sep 17 00:00:00 2001
From: Jens Rantil <jens.rantil@tink.se>
Date: Fri, 22 Mar 2019 20:27:32 +0100
Subject: [PATCH] ref(memberlist): take read lock when only reading

Likely not super important commit, but nice for clarity, I guess.
---
 memberlist.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/memberlist.go b/memberlist.go
index f289a12ae..bb4a663a7 100644
--- a/memberlist.go
+++ b/memberlist.go
@@ -571,9 +571,9 @@ func (m *Memberlist) Leave(timeout time.Duration) error {
 	if !m.hasLeft() {
 		atomic.StoreInt32(&m.leave, 1)
 
-		m.nodeLock.Lock()
+		m.nodeLock.RLock()
 		state, ok := m.nodeMap[m.config.Name]
-		m.nodeLock.Unlock()
+		m.nodeLock.RUnlock()
 		if !ok {
 			m.logger.Printf("[WARN] memberlist: Leave but we're not in the node map.")
 			return nil