# MutantHub mutant #4287: Relational operator mutation at validation.cpp:5359
# Repository: bitcoin/bitcoin @ ddea9196493d3b8fd841a36a6c53efd85dac7a05
# File: src/validation.cpp:5359-5359
# Review: APPROVED; outcome: SURVIVED
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -5359,1 +5359,1 @@
-        if ((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_CHAIN) assert(pindexFirstNotChainValid == nullptr); // CHAIN valid implies all parents are CHAIN valid
+        if ((pindex->nStatus & BLOCK_VALID_MASK) > BLOCK_VALID_CHAIN) assert(pindexFirstNotChainValid == nullptr); // CHAIN valid implies all parents are CHAIN valid