From 0defad229f0586164960b82edcfbf1bdcb0aa0d3 Mon Sep 17 00:00:00 2001
From: Roland Conybeare <rconybeare@gmail.com>
Date: Fri, 1 May 2026 20:15:45 -0400
Subject: [PATCH] xo-object2: prep DList for write barrier in _assign_rest()

---
 xo-object2/src/object2/DList.cpp | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/xo-object2/src/object2/DList.cpp b/xo-object2/src/object2/DList.cpp
index f6e5d494..75bde74c 100644
--- a/xo-object2/src/object2/DList.cpp
+++ b/xo-object2/src/object2/DList.cpp
@@ -141,11 +141,20 @@ namespace xo {
         }
 
         void
-        DList::_assign_rest(DList * r)
+        DList::_assign_rest(DList * rest)
         {
             scope log(XO_DEBUG(true), "need write barrier");
 
-            this->rest_ = r;
+#ifdef NOT_YET
+            obj<AGCObject,DList> rest_gco(rest);
+
+            mm.barrier_assign_aux(this,
+                                  nullptr /*lhs iface unused*/,
+                                  &(this->rest_),
+                                  rest_gco.iface(),
+                                  rest);
+#endif
+            this->rest_ = rest;
         }
 
         bool