# MutantHub mutant #3728: Relational operator mutation at musig.cpp:100
# Repository: bitcoin/bitcoin @ d4b0e1e4b078dbb4ab57886d288470684dec5718
# File: src/musig.cpp:100-100
# Review: APPROVED; outcome: KILLED
--- a/src/musig.cpp
+++ b/src/musig.cpp
@@ -100,1 +100,1 @@
-    bool IsValid() { return m_nonce != nullptr; }
+    bool IsValid() { return m_nonce == nullptr; }