From c9d37e13d17b665c247b4f41d58b769ec70cb35c Mon Sep 17 00:00:00 2001
From: Roland Conybeare <rconybeare@gmail.com>
Date: Sun, 21 Dec 2025 22:36:05 -0500
Subject: [PATCH] xo-alloc2: bugfix: account for guard_z for begin_header()

---
 xo-alloc2/src/alloc2/DArena.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xo-alloc2/src/alloc2/DArena.cpp b/xo-alloc2/src/alloc2/DArena.cpp
index d9dd832d..a2bcd0e6 100644
--- a/xo-alloc2/src/alloc2/DArena.cpp
+++ b/xo-alloc2/src/alloc2/DArena.cpp
@@ -299,7 +299,7 @@ namespace xo {
                 return nullptr;
             }
 
-            return (AllocHeader *)lo_;
+            return (AllocHeader *)(lo_ + config_.header_.guard_z_);
         }
 
         AllocHeader *