# MutantHub mutant #3183: Arithmetic operator mutation at script_patterns.ipp:299
# Repository: libbitcoin/libbitcoin-system @ 98db5bfd7c7b65532e42309c7b71419d82ec5ea8
# File: include/bitcoin/system/impl/chain/script_patterns.ipp:299-299
# Review: APPROVED; outcome: KILLED
--- a/include/bitcoin/system/impl/chain/script_patterns.ipp
+++ b/include/bitcoin/system/impl/chain/script_patterns.ipp
@@ -299,1 +299,1 @@
-    const auto& n_op = ops[ops.size() - 2u];
+    const auto& n_op = ops[ops.size() + 2u];