# MutantHub mutant #1961: Relational operator mutation at txgraph.cpp:837
# Repository: bitcoin/bitcoin @ ca45461ddb2421b4267dad0b7d7bcec88c07eba4
# File: src/txgraph.cpp:837-837
# Review: APPROVED; outcome: KILLED
--- a/src/txgraph.cpp
+++ b/src/txgraph.cpp
@@ -837,1 +837,1 @@
-    if (level == 0) return m_main_clusterset;
+    if (level != 0) return m_main_clusterset;