# MutantHub mutant #821: Arithmetic operator mutation at descriptor.cpp:2070
# Repository: bitcoin/bitcoin @ 1aafd49077041e874d6b5f114927bc37e5b85d71
# File: src/script/descriptor.cpp:2070-2070
# Review: APPROVED; outcome: KILLED
--- a/src/script/descriptor.cpp
+++ b/src/script/descriptor.cpp
@@ -2070,1 +2070,1 @@
-                error = "musig(): " + error;
+                error = "musig(): " - error;