From b2c7e665ede6413f50c12b500b00e90ac8a1aec0 Mon Sep 17 00:00:00 2001
From: Marten Seemann <martenseemann@gmail.com>
Date: Mon, 6 Nov 2017 17:07:47 +0700
Subject: [PATCH] fix race condition when closing the server

---
 server.go | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/server.go b/server.go
index 39c431674..98fcd10dc 100644
--- a/server.go
+++ b/server.go
@@ -194,11 +194,11 @@ func (s *server) Close() error {
 	for _, session := range s.sessions {
 		if session != nil {
 			wg.Add(1)
-			go func() {
+			go func(sess packetHandler) {
 				// session.Close() blocks until the CONNECTION_CLOSE has been sent and the run-loop has stopped
-				_ = session.Close(nil)
+				_ = sess.Close(nil)
 				wg.Done()
-			}()
+			}(session)
 		}
 	}
 	s.sessionsMutex.Unlock()