# MutantHub mutant #4257: Arithmetic operator mutation at validation.cpp:5101
# Repository: bitcoin/bitcoin @ ddea9196493d3b8fd841a36a6c53efd85dac7a05
# File: src/validation.cpp:5101-5101
# Review: APPROVED; outcome: KILLED
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -5101,1 +5101,1 @@
-                nRewind = nBlockPos + nSize;
+                nRewind = nBlockPos - nSize;