From b94e829776a8056f8ae4fd5d95fcd3b0b5cc9f59 Mon Sep 17 00:00:00 2001
From: Vasiliy Tolstov <v.tolstov@unistack.org>
Date: Mon, 12 Apr 2021 19:20:17 +0300
Subject: [PATCH] fix nil buf check

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
---
 yaml.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/yaml.go b/yaml.go
index c3aae71..82f8906 100644
--- a/yaml.go
+++ b/yaml.go
@@ -23,7 +23,7 @@ func (c *yamlCodec) Marshal(b interface{}) ([]byte, error) {
 }
 
 func (c *yamlCodec) Unmarshal(b []byte, v interface{}) error {
-	if b == nil {
+	if len(b) == 0 {
 		return nil
 	}
 	switch m := v.(type) {
@@ -49,6 +49,8 @@ func (c *yamlCodec) ReadBody(conn io.Reader, b interface{}) error {
 		buf, err := ioutil.ReadAll(conn)
 		if err != nil {
 			return err
+		} else if len(buf) == 0 {
+			return nil
 		}
 		m.Data = buf
 		return nil
@@ -57,7 +59,7 @@ func (c *yamlCodec) ReadBody(conn io.Reader, b interface{}) error {
 	buf, err := ioutil.ReadAll(conn)
 	if err != nil {
 		return err
-	} else if buf == nil {
+	} else if len(buf) == 0 {
 		// not needed but similar changes in all codecs
 		return nil
 	}