From b27e80fd2e0e5c2f92dffecd043da80a0d55070c Mon Sep 17 00:00:00 2001
From: Peter Tschipper <peter.tschipper@gmail.com>
Date: Mon, 1 May 2017 05:51:06 -0700
Subject: [PATCH] Lock mapThinBlocksInFlight before erasing elements, in
 parallel.cpp

---
 src/parallel.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/parallel.cpp b/src/parallel.cpp
index 9001d9618d3..9732dfe83a3 100644
--- a/src/parallel.cpp
+++ b/src/parallel.cpp
@@ -5,6 +5,7 @@
 #include "parallel.h"
 #include "chainparams.h"
 #include "main.h"
+#include "net.h"
 #include "pow.h"
 #include "timedata.h"
 #include "unlimited.h"
@@ -552,7 +553,7 @@ void HandleBlockMessageThread(CNode *pfrom, const string &strCommand, const CBlo
     {
         int nTotalThinBlocksInFlight = 0;
         {
-            LOCK(cs_vNodes);
+            LOCK2(cs_vNodes, pfrom->cs_mapthinblocksinflight);
             // Erase this thinblock from the tracking map now that we're done with it.
             if (pfrom->mapThinBlocksInFlight.erase(inv.hash))
             {