From 2f12d41d9d5bdab8801c41820ee6477721e0eb43 Mon Sep 17 00:00:00 2001
From: Jakob Borg <jakob@nym.se>
Date: Fri, 13 Nov 2015 15:44:30 +0100
Subject: [PATCH] Don't dirty blockmap key between lookups (fixes #2455)

---
 lib/db/blockmap.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/db/blockmap.go b/lib/db/blockmap.go
index ec932568..a1dd333c 100644
--- a/lib/db/blockmap.go
+++ b/lib/db/blockmap.go
@@ -214,6 +214,9 @@ func blockKeyInto(o, hash []byte, folder, file string) []byte {
 	}
 	o[0] = KeyTypeBlock
 	copy(o[1:], []byte(folder))
+	for i := len(folder); i < 64; i++ {
+		o[1+i] = 0
+	}
 	copy(o[1+64:], []byte(hash))
 	copy(o[1+64+32:], []byte(file))
 	return o