From 07905164401b96a80b5cfe4731016d1e44f83b60 Mon Sep 17 00:00:00 2001
From: Matt Joiner <anacrolix@gmail.com>
Date: Mon, 18 Sep 2017 13:40:36 +1000
Subject: [PATCH] Only run connection.Close once

Avoids unnecessary error messages for net.Conn.Close
---
 connection.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/connection.go b/connection.go
index 4655b136..9b102eb8 100644
--- a/connection.go
+++ b/connection.go
@@ -226,7 +226,9 @@ func priorityBitmapHeadAsSlice(pb *prioritybitmap.PriorityBitmap, n int) (ret []
 }
 
 func (cn *connection) Close() {
-	cn.closed.Set()
+	if !cn.closed.Set() {
+		return
+	}
 	cn.discardPieceInclination()
 	cn.pieceRequestOrder.Clear()
 	if cn.conn != nil {