# MutantHub mutant #4215: Relational operator mutation at validation.cpp:4904
# Repository: bitcoin/bitcoin @ ddea9196493d3b8fd841a36a6c53efd85dac7a05
# File: src/validation.cpp:4904-4904
# Review: APPROVED; outcome: KILLED
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -4904,1 +4904,1 @@
-    if (pindexOld != pindexFork) {
+    if (pindexOld == pindexFork) {