From a738132a16e57a8c00628dfa41035030d916f5e2 Mon Sep 17 00:00:00 2001
From: Bronek Kozicki <brok@incorrekt.com>
Date: Fri, 20 Oct 2023 21:38:17 +0100
Subject: [PATCH] Add assert in MultivarJson::select

---
 src/ripple/json/MultivarJson.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/ripple/json/MultivarJson.h b/src/ripple/json/MultivarJson.h
index c3ccc971104..72ec5c95324 100644
--- a/src/ripple/json/MultivarJson.h
+++ b/src/ripple/json/MultivarJson.h
@@ -23,6 +23,7 @@
 #include <ripple/json/json_value.h>
 
 #include <array>
+#include <cassert>
 #include <concepts>
 #include <cstdlib>
 
@@ -37,7 +38,9 @@ struct MultivarJson
     select(auto&& selector) const
         requires std::same_as<std::size_t, decltype(selector())>
     {
-        return val[selector()];
+        auto const index = selector();
+        assert(index < size);
+        return val[index];
     }
 
     void