# MutantHub mutant #2138: Arithmetic operator mutation at txgraph.cpp:3120
# Repository: bitcoin/bitcoin @ ca45461ddb2421b4267dad0b7d7bcec88c07eba4
# File: src/txgraph.cpp:3120-3120
# Review: APPROVED; outcome: KILLED
--- a/src/txgraph.cpp
+++ b/src/txgraph.cpp
@@ -3120,1 +3120,1 @@
-        for (int level = GetTopLevel(); level >= 0; --level) {
+        for (int level = GetTopLevel(); level >= 0; ++level) {