# MutantHub mutant #1599: Logical operator mutation at interpreter.cpp:1211
# Repository: bitcoin/bitcoin @ 05e49b342faa1412266951429c135e9f5daa30c2
# File: src/script/interpreter.cpp:1211-1211
# Review: APPROVED; outcome: KILLED
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -1211,1 +1211,1 @@
-                    if ((flags & SCRIPT_VERIFY_NULLDUMMY) && stacktop(-1).size())
+                    if ((flags & SCRIPT_VERIFY_NULLDUMMY) || stacktop(-1).size())