# MutantHub mutant #4168: Logical operator mutation at validation.cpp:4730
# Repository: bitcoin/bitcoin @ ddea9196493d3b8fd841a36a6c53efd85dac7a05
# File: src/validation.cpp:4730-4730
# Review: APPROVED; outcome: SURVIVED
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -4730,1 +4730,1 @@
-    for (pindex = chainstate.m_chain.Tip(); pindex && pindex->pprev; pindex = pindex->pprev) {
+    for (pindex = chainstate.m_chain.Tip(); pindex || pindex->pprev; pindex = pindex->pprev) {