From 17cdc2dfa561dd73854a4c88521c0bf1357189da Mon Sep 17 00:00:00 2001
From: haodong <haodong.tang@intel.com>
Date: Sun, 14 Aug 2016 06:55:27 +0800
Subject: [PATCH] kv: fix iterator bug in prev

Signed-off-by: Haodong Tang <haodong.tang@intel.com>
---
 src/kv/MemDB.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/kv/MemDB.cc b/src/kv/MemDB.cc
index b0563882c83f56..9e6c4c670921ae 100644
--- a/src/kv/MemDB.cc
+++ b/src/kv/MemDB.cc
@@ -478,8 +478,8 @@ int MemDB::MDBWholeSpaceIteratorImpl:: prev()
     return -1;
   }
   free_last();
-  m_iter--;
-  if (m_iter != m_btree_p->end()) {
+  if (m_iter != m_btree_p->begin()) {
+    m_iter--;
     fill_current();
     return 0;
   } else {