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-rw-r--r--src/main.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/main.cpp b/src/main.cpp
index df4f5e3959..37daa08da9 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -5442,6 +5442,8 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
BlockTransactionsRequest req;
vRecv >> req;
+ LOCK(cs_main);
+
BlockMap::iterator it = mapBlockIndex.find(req.blockhash);
if (it == mapBlockIndex.end() || !(it->second->nStatus & BLOCK_HAVE_DATA)) {
LogPrintf("Peer %d sent us a getblocktxn for a block we don't have", pfrom->id);