From a475285a535ca4834df51569f1d252307fd6d13c Mon Sep 17 00:00:00 2001
From: "Wladimir J. van der Laan" <laanwj@gmail.com>
Date: Wed, 7 May 2014 15:12:31 +0200
Subject: [PATCH] Add missing cs_main lock to VerifyDB

Fixes issue #4139.
---
 src/main.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/main.cpp b/src/main.cpp
index 40c713ce9..7b9ca2878 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2875,6 +2875,7 @@ bool static LoadBlockIndexDB()
 
 bool VerifyDB(int nCheckLevel, int nCheckDepth)
 {
+    LOCK(cs_main);
     if (chainActive.Tip() == NULL || chainActive.Tip()->pprev == NULL)
         return true;