# MutantHub mutant #4238: Logical operator mutation at validation.cpp:5011
# Repository: bitcoin/bitcoin @ ddea9196493d3b8fd841a36a6c53efd85dac7a05
# File: src/validation.cpp:5011-5011
# Review: APPROVED; outcome: SURVIVED
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -5011,1 +5011,1 @@
-            if (pindex->IsValid(BLOCK_VALID_TREE) && (m_best_header == nullptr || CBlockIndexWorkComparator()(m_best_header, pindex)))
+            if (pindex->IsValid(BLOCK_VALID_TREE) || (m_best_header == nullptr || CBlockIndexWorkComparator()(m_best_header, pindex)))