From 5fae0cfe65f409b17d57781a17bcbfb008814dc7 Mon Sep 17 00:00:00 2001
From: Sergei Petrunia <sergey@mariadb.com>
Date: Tue, 20 Oct 2026 20:06:34 +0300
Subject: [PATCH] In Item::dbug_check_shallow_copy_type, assume that cloning
 creates one item.

---
 sql/item.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sql/item.cc b/sql/item.cc
index 0529fa75c93..937647a8c7f 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -12337,6 +12337,7 @@ void Item::dbug_check_shallow_copy_type(THD *thd) const
     To achieve this, unlink it from thd->free_list and delete ourselves.
     Note that this currently requires that the copy is last in the list (TODO?)
   */
+  DBUG_ASSERT(thd->free_list == item_copy);
   if (thd->free_list == item_copy)
     thd->free_list= item_copy->next;
   if (typeid(*item_copy) != typeid(*this))