From fa6ff77ceebd9569c92222e265f8dba49d9d8d42 Mon Sep 17 00:00:00 2001
From: Darien Raymond <admin@v2ray.com>
Date: Thu, 29 Mar 2018 21:40:23 +0200
Subject: [PATCH] prevent appending nil buffer

---
 common/buf/multi_buffer.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/common/buf/multi_buffer.go b/common/buf/multi_buffer.go
index a442ce115..a245123c8 100644
--- a/common/buf/multi_buffer.go
+++ b/common/buf/multi_buffer.go
@@ -57,7 +57,9 @@ func NewMultiBufferValue(b ...*Buffer) MultiBuffer {
 
 // Append appends buffer to the end of this MultiBuffer
 func (mb *MultiBuffer) Append(buf *Buffer) {
-	*mb = append(*mb, buf)
+	if buf != nil {
+		*mb = append(*mb, buf)
+	}
 }
 
 // AppendMulti appends a MultiBuffer to the end of this one.