# MutantHub mutant #2166: Arithmetic operator mutation at txgraph.cpp:3420
# Repository: bitcoin/bitcoin @ ca45461ddb2421b4267dad0b7d7bcec88c07eba4
# File: src/txgraph.cpp:3420-3420
# Review: APPROVED; outcome: KILLED
--- a/src/txgraph.cpp
+++ b/src/txgraph.cpp
@@ -3420,1 +3420,1 @@
-            trim_it->m_parent_offset = deps_it - deps_by_child.begin();
+            trim_it->m_parent_offset = deps_it + deps_by_child.begin();