From 39ce835b1bef1ae4d1d1cab96f1e362e3466bbc5 Mon Sep 17 00:00:00 2001
From: Roland Conybeare <rconybeare@gmail.com>
Date: Mon, 2 Feb 2026 21:55:34 -0500
Subject: [PATCH] xo-interpreter2: scaffold repl + alloc measurement frameowkr

---
 include/xo/facet/box.hpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/xo/facet/box.hpp b/include/xo/facet/box.hpp
index 54e724e..62f797e 100644
--- a/include/xo/facet/box.hpp
+++ b/include/xo/facet/box.hpp
@@ -38,6 +38,7 @@ namespace xo {
             {}
 
             /** (copy ctor not supported -- ownership is unique) **/
+            box(const box & other) = delete;
 
             // --------------------------------
 
@@ -73,8 +74,10 @@ namespace xo {
 
             ~box() {
                 auto p = this->data();
-                this->_drop();
-                ::operator delete(p);
+                if (p) {
+                    this->_drop();
+                    ::operator delete(p);
+                }
             }
         };
     } /*namespace facet*/