message: tests: Fill fuzzing coverage gaps for functions in primitives/block.h
diff: @@ -38,4 +38,12 @@ void test_one_input(const std::vector<uint8_t>& buffer)
  block.SetNull();
  assert(block.GetBlockHeader().GetHash() == mut_block_header.GetHash());
  }
  + {
  + std::optional<CBlockLocator> block_locator = ConsumeDeserializable<CBlockLocator>(fuzzed_data_provider);
  + if (block_locator) {
  + (void)block_locator->IsNull();
  + block_locator->SetNull();
  + assert(block_locator->IsNull());
  + }
  + }
  }
  