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-rw-r--r--src/main.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/main.cpp b/src/main.cpp
index 0bbe833705..a591168c07 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1727,6 +1727,7 @@ void ThreadScriptCheck() {
bool ConnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, CCoinsViewCache& view, bool fJustCheck)
{
+ AssertLockHeld(cs_main);
// Check it again in case a previous version let a bad block in
if (!CheckBlock(block, state, !fJustCheck, !fJustCheck))
return false;