# MutantHub mutant #4093: Logical operator mutation at validation.cpp:3903
# Repository: bitcoin/bitcoin @ ddea9196493d3b8fd841a36a6c53efd85dac7a05
# File: src/validation.cpp:3903-3903
# Review: APPROVED; outcome: SURVIVED
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -3903,1 +3903,1 @@
-        if (pindexNew->pprev && pindexNew->pprev->IsValid(BLOCK_VALID_TREE)) {
+        if (pindexNew->pprev || pindexNew->pprev->IsValid(BLOCK_VALID_TREE)) {