From a14b1596650d0c402b8af98f9df0477db9106b3a Mon Sep 17 00:00:00 2001
From: Braden Ganetsky <braden.ganetsky@gmail.com>
Date: Wed, 7 Aug 2024 16:15:36 -0500
Subject: [PATCH] Add missing calls to as_const(), otherwise we may call a
 'T(T&)' constructor instead of the intended 'T(T const&)'

---
 include/boost/unordered/detail/foa/node_map_types.hpp | 3 ++-
 include/boost/unordered/detail/foa/node_set_types.hpp | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/boost/unordered/detail/foa/node_map_types.hpp b/include/boost/unordered/detail/foa/node_map_types.hpp
index 789251a6..f13a7a84 100644
--- a/include/boost/unordered/detail/foa/node_map_types.hpp
+++ b/include/boost/unordered/detail/foa/node_map_types.hpp
@@ -8,6 +8,7 @@
 
 #include <boost/unordered/detail/foa/element_type.hpp>
 #include <boost/unordered/detail/foa/types_constructibility.hpp>
+#include <boost/unordered/detail/type_traits.hpp>
 
 #include <boost/core/allocator_access.hpp>
 #include <boost/core/no_exceptions_support.hpp>
@@ -72,7 +73,7 @@ namespace boost {
           static void construct(
             A& al, element_type* p, element_type const& copy)
           {
-            construct(al, p, *copy.p);
+            construct(al, p, detail::as_const(*copy.p));
           }
 
           template <class A, class... Args>
diff --git a/include/boost/unordered/detail/foa/node_set_types.hpp b/include/boost/unordered/detail/foa/node_set_types.hpp
index bc2ee8ac..da47793f 100644
--- a/include/boost/unordered/detail/foa/node_set_types.hpp
+++ b/include/boost/unordered/detail/foa/node_set_types.hpp
@@ -7,6 +7,7 @@
 
 #include <boost/unordered/detail/foa/element_type.hpp>
 #include <boost/unordered/detail/foa/types_constructibility.hpp>
+#include <boost/unordered/detail/type_traits.hpp>
 
 #include <boost/core/allocator_access.hpp>
 #include <boost/core/no_exceptions_support.hpp>
@@ -39,7 +40,7 @@ namespace boost {
           static void construct(
             A& al, element_type* p, element_type const& copy)
           {
-            construct(al, p, *copy.p);
+            construct(al, p, detail::as_const(*copy.p));
           }
 
           template <typename Allocator>