message: validation: Hold cs_main when reading chainActive in RewindBlockIndex
diff: @@ -4316,6 +4316,7 @@ bool RewindBlockIndex(const CChainParams& params) {
  return false;
  }
  + LOCK(cs_main);
  if (::ChainActive().Tip() != nullptr) {
  // FlushStateToDisk can possibly read ::ChainActive(). Be conservative
  // and skip it here, we're about to -reindex-chainstate anyway, so
  