# MutantHub mutant #2015: Arithmetic operator mutation at txgraph.cpp:1626
# Repository: bitcoin/bitcoin @ ca45461ddb2421b4267dad0b7d7bcec88c07eba4
# File: src/txgraph.cpp:1626-1626
# Review: APPROVED; outcome: KILLED
--- a/src/txgraph.cpp
+++ b/src/txgraph.cpp
@@ -1626,1 +1626,1 @@
-    auto max_setindex = quality_clusters.size() - 1;
+    auto max_setindex = quality_clusters.size() + 1;