From 2b00b7d66dd6582405aaae64024bbb9590cc9604 Mon Sep 17 00:00:00 2001
From: huwenbo <huwenbo@didichuxing.com>
Date: Tue, 13 Jun 2017 20:15:43 +0800
Subject: [PATCH] fix panic: sync: negative WaitGroup counter

---
 grace/conn.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/grace/conn.go b/grace/conn.go
index 4553e182..6f52045f 100644
--- a/grace/conn.go
+++ b/grace/conn.go
@@ -13,7 +13,7 @@ type graceConn struct {
 	closed bool
 }
 
-func (c graceConn) Close() (err error) {
+func (c *graceConn) Close() (err error) {
 	defer func() {
 		if r := recover(); r != nil {
 			switch x := r.(type) {