From e46d210b5d866a16737d960f57fa9f0c50b9f86a Mon Sep 17 00:00:00 2001
From: Liam Stanley <me@liamstanley.io>
Date: Fri, 6 Apr 2018 21:29:34 -0400
Subject: [PATCH] fix Client.conn data race during pong; closes #11

---
 builtin.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/builtin.go b/builtin.go
index e7ccc19..12257ca 100644
--- a/builtin.go
+++ b/builtin.go
@@ -113,7 +113,9 @@ func handlePING(c *Client, e Event) {
 }
 
 func handlePONG(c *Client, e Event) {
+	c.conn.mu.Lock()
 	c.conn.lastPong = time.Now()
+	c.conn.mu.Unlock()
 }
 
 // handleJOIN ensures that the state has updated users and channels.