# MutantHub mutant #963: Constant replacement mutation at descriptor.cpp:2870
# Repository: bitcoin/bitcoin @ 1aafd49077041e874d6b5f114927bc37e5b85d71
# File: src/script/descriptor.cpp:2870-2870
# Review: APPROVED; outcome: KILLED
--- a/src/script/descriptor.cpp
+++ b/src/script/descriptor.cpp
@@ -2870,1 +2870,1 @@
-                keys.emplace_back(std::move(key.at(0)));
+                keys.emplace_back(std::move(key.at(0 - 1)));