# MutantHub mutant #4290: Logical operator mutation at validation.cpp:5421
# Repository: bitcoin/bitcoin @ ddea9196493d3b8fd841a36a6c53efd85dac7a05
# File: src/validation.cpp:5421-5421
# Review: APPROVED; outcome: SURVIVED
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -5421,1 +5421,1 @@
-                    if (pindexFirstMissing == nullptr || pindex == c->m_chain.Tip() || pindex == c->SnapshotBase()) {
+                    if (pindexFirstMissing == nullptr && pindex == c->m_chain.Tip() || pindex == c->SnapshotBase()) {