# MutantHub mutant #3931: Custom mutation at validation.cpp:373
# Repository: bitcoin/bitcoin @ ddea9196493d3b8fd841a36a6c53efd85dac7a05
# File: src/validation.cpp:373-373
# Review: APPROVED; outcome: SURVIVED
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -373,1 +373,1 @@
-                if (m_mempool->exists(txin.prevout.hash)) continue;
+                if (m_mempool->exists(txin.prevout.hash)) break;