From 43a6f10050bc6c6680ffe2f753bcb80f89efa2e7 Mon Sep 17 00:00:00 2001
From: Ed Hennis <ed@ripple.com>
Date: Tue, 2 Dec 2025 22:56:19 -0500
Subject: [PATCH] MPTTester::operator() parameter should be std::int64_t

- Originally defined as uint64_t, but the testIssuerLoan() test called
  it with a negative number, causing an overflow to a very large number
  that in some circumstances could be silently cast back to an int64_t,
  but might not be. I believe this is UB, and we don't want to rely on
  that.
---
 src/test/jtx/impl/mpt.cpp | 2 +-
 src/test/jtx/mpt.h        | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/test/jtx/impl/mpt.cpp b/src/test/jtx/impl/mpt.cpp
index fc831790f1..d7b4a1570e 100644
--- a/src/test/jtx/impl/mpt.cpp
+++ b/src/test/jtx/impl/mpt.cpp
@@ -644,7 +644,7 @@ MPTTester::operator[](std::string const& name) const
 }
 
 PrettyAmount
-MPTTester::operator()(std::uint64_t amount) const
+MPTTester::operator()(std::int64_t amount) const
 {
     return MPT("", issuanceID())(amount);
 }
diff --git a/src/test/jtx/mpt.h b/src/test/jtx/mpt.h
index f9c58ebc9e..e3097b28b0 100644
--- a/src/test/jtx/mpt.h
+++ b/src/test/jtx/mpt.h
@@ -272,7 +272,7 @@ public:
     operator[](std::string const& name) const;
 
     PrettyAmount
-    operator()(std::uint64_t amount) const;
+    operator()(std::int64_t amount) const;
 
     operator Asset() const;