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-rw-r--r--src/bench/duplicate_inputs.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/bench/duplicate_inputs.cpp b/src/bench/duplicate_inputs.cpp
index aa3f219b18..80ff13612c 100644
--- a/src/bench/duplicate_inputs.cpp
+++ b/src/bench/duplicate_inputs.cpp
@@ -29,6 +29,7 @@ static void DuplicateInputs(benchmark::State& state)
CMutableTransaction coinbaseTx{};
CMutableTransaction naughtyTx{};
+ LOCK(cs_main);
CBlockIndex* pindexPrev = ::ChainActive().Tip();
assert(pindexPrev != nullptr);
block.nBits = GetNextWorkRequired(pindexPrev, &block, chainparams.GetConsensus());