# MutantHub mutant #1937: Logical operator mutation at txgraph.cpp:483
# Repository: bitcoin/bitcoin @ ca45461ddb2421b4267dad0b7d7bcec88c07eba4
# File: src/txgraph.cpp:483-483
# Review: APPROVED; outcome: KILLED
--- a/src/txgraph.cpp
+++ b/src/txgraph.cpp
@@ -483,1 +483,1 @@
-        if (a == nullptr || b == nullptr) {
+        if (a == nullptr && b == nullptr) {