From d56327b887684d5a6b99a348bbb38b87c24848c2 Mon Sep 17 00:00:00 2001
From: Oren <oren.sokolowsky@gmail.com>
Date: Mon, 27 Mar 2017 14:11:45 +0300
Subject: [PATCH] check data len for 0

---
 swarm/storage/binarymerkle.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/swarm/storage/binarymerkle.go b/swarm/storage/binarymerkle.go
index 12e0e96ea7..c33fe3d1a9 100644
--- a/swarm/storage/binarymerkle.go
+++ b/swarm/storage/binarymerkle.go
@@ -178,6 +178,9 @@ func GetHeight(count uint64) int {
 // Count - Numers of leafs at the BMT
 // error -
 func BuildBMT(h Hasher, data []byte, segmentsize int) (bmt *BTree, roor *Root, count int, err error) {
+	if len(data) == 0 {
+		return nil, nil, 0, errors.New("data length is 0 ")
+	}
 	hashFunc = h
 	leafcount := len(data) / segmentsize
 	if len(data)%segmentsize != 0 {