# MutantHub mutant #1178: Logical operator mutation at interpreter.cpp:351
# Repository: bitcoin/bitcoin @ 05e49b342faa1412266951429c135e9f5daa30c2
# File: src/script/interpreter.cpp:351-351
# Review: APPROVED; outcome: KILLED
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -351,1 +351,1 @@
-    if (!fSuccess && (flags & SCRIPT_VERIFY_NULLFAIL) && vchSig.size())
+    if (!fSuccess || (flags & SCRIPT_VERIFY_NULLFAIL) && vchSig.size())