From e1a4f99eaaeed740b45cfd551f7b1e639906818b Mon Sep 17 00:00:00 2001
From: blemasle <blemasle+github@gmail.com>
Date: Wed, 25 Mar 2015 15:39:36 +0100
Subject: [PATCH] fixed panic error on user login

---
 modules/asn1-ber/ber.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/asn1-ber/ber.go b/modules/asn1-ber/ber.go
index 52b9a591801..b9537e30602 100644
--- a/modules/asn1-ber/ber.go
+++ b/modules/asn1-ber/ber.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io"
 	"reflect"
+	"errors"
 )
 
 type Packet struct {
@@ -177,6 +178,10 @@ func readBytes(reader io.Reader, buf []byte) error {
 	idx := 0
 	buflen := len(buf)
 
+	if reader == nil {
+		return errors.New("reader was nil, aborting")
+	}
+	
 	for idx < buflen {
 		n, err := reader.Read(buf[idx:])
 		if err != nil {