diff --git a/include/boost/container/detail/flat_tree.hpp b/include/boost/container/detail/flat_tree.hpp
index 061b840..e131cf1 100644
--- a/include/boost/container/detail/flat_tree.hpp
+++ b/include/boost/container/detail/flat_tree.hpp
@@ -921,11 +921,11 @@ class flat_tree
    std::pair<iterator, bool> emplace_unique(BOOST_FWD_REF(Args)... args)
    {
       typename aligned_storage<sizeof(value_type), alignment_of<value_type>::value>::type v;
-      value_type &val = *static_cast<value_type *>(static_cast<void *>(v.data));
+      value_type *pval = reinterpret_cast<value_type *>(v.data);
       get_stored_allocator_noconst_return_t a = this->get_stored_allocator();
-      stored_allocator_traits::construct(a, &val, ::boost::forward<Args>(args)... );
-      value_destructor<stored_allocator_type, value_type> d(a, val);
-      return this->insert_unique(::boost::move(val));
+      stored_allocator_traits::construct(a, pval, ::boost::forward<Args>(args)... );
+      value_destructor<stored_allocator_type, value_type> d(a, *pval);
+      return this->insert_unique(::boost::move(*pval));
    }
 
    template <class... Args>
@@ -933,22 +933,22 @@ class flat_tree
    {
       //hint checked in insert_unique
       typename aligned_storage<sizeof(value_type), alignment_of<value_type>::value>::type v;
-      value_type &val = *static_cast<value_type *>(static_cast<void *>(v.data));
+      value_type *pval = reinterpret_cast<value_type *>(v.data);
       get_stored_allocator_noconst_return_t a = this->get_stored_allocator();
-      stored_allocator_traits::construct(a, &val, ::boost::forward<Args>(args)... );
-      value_destructor<stored_allocator_type, value_type> d(a, val);
-      return this->insert_unique(hint, ::boost::move(val));
+      stored_allocator_traits::construct(a, pval, ::boost::forward<Args>(args)... );
+      value_destructor<stored_allocator_type, value_type> d(a, *pval);
+      return this->insert_unique(hint, ::boost::move(*pval));
    }
 
    template <class... Args>
    iterator emplace_equal(BOOST_FWD_REF(Args)... args)
    {
       typename aligned_storage<sizeof(value_type), alignment_of<value_type>::value>::type v;
-      value_type &val = *static_cast<value_type *>(static_cast<void *>(v.data));
+      value_type *pval = reinterpret_cast<value_type *>(v.data);
       get_stored_allocator_noconst_return_t a = this->get_stored_allocator();
-      stored_allocator_traits::construct(a, &val, ::boost::forward<Args>(args)... );
-      value_destructor<stored_allocator_type, value_type> d(a, val);
-      return this->insert_equal(::boost::move(val));
+      stored_allocator_traits::construct(a, pval, ::boost::forward<Args>(args)... );
+      value_destructor<stored_allocator_type, value_type> d(a, *pval);
+      return this->insert_equal(::boost::move(*pval));
    }
 
    template <class... Args>
@@ -956,11 +956,11 @@ class flat_tree
    {
       //hint checked in insert_equal
       typename aligned_storage<sizeof(value_type), alignment_of<value_type>::value>::type v;
-      value_type &val = *static_cast<value_type *>(static_cast<void *>(v.data));
+      value_type *pval = reinterpret_cast<value_type *>(v.data);
       get_stored_allocator_noconst_return_t a = this->get_stored_allocator();
-      stored_allocator_traits::construct(a, &val, ::boost::forward<Args>(args)... );
-      value_destructor<stored_allocator_type, value_type> d(a, val);
-      return this->insert_equal(hint, ::boost::move(val));
+      stored_allocator_traits::construct(a, pval, ::boost::forward<Args>(args)... );
+      value_destructor<stored_allocator_type, value_type> d(a, *pval);
+      return this->insert_equal(hint, ::boost::move(*pval));
    }
 
    template <class KeyType, class... Args>
@@ -993,44 +993,44 @@ class flat_tree
    std::pair<iterator, bool> emplace_unique(BOOST_MOVE_UREF##N)\
    {\
       typename aligned_storage<sizeof(value_type), alignment_of<value_type>::value>::type v;\
-      value_type &val = *static_cast<value_type *>(static_cast<void *>(v.data));\
+      value_type *pval = reinterpret_cast<value_type *>(v.data);\
       get_stored_allocator_noconst_return_t a = this->get_stored_allocator();\
-      stored_allocator_traits::construct(a, &val BOOST_MOVE_I##N BOOST_MOVE_FWD##N);\
-      value_destructor<stored_allocator_type, value_type> d(a, val);\
-      return this->insert_unique(::boost::move(val));\
+      stored_allocator_traits::construct(a, pval BOOST_MOVE_I##N BOOST_MOVE_FWD##N);\
+      value_destructor<stored_allocator_type, value_type> d(a, *pval);\
+      return this->insert_unique(::boost::move(*pval));\
    }\
    \
    BOOST_MOVE_TMPL_LT##N BOOST_MOVE_CLASS##N BOOST_MOVE_GT##N \
    iterator emplace_hint_unique(const_iterator hint BOOST_MOVE_I##N BOOST_MOVE_UREF##N)\
    {\
       typename aligned_storage<sizeof(value_type), alignment_of<value_type>::value>::type v;\
-      value_type &val = *static_cast<value_type *>(static_cast<void *>(v.data));\
+      value_type *pval = reinterpret_cast<value_type *>(v.data);\
       get_stored_allocator_noconst_return_t a = this->get_stored_allocator();\
-      stored_allocator_traits::construct(a, &val BOOST_MOVE_I##N BOOST_MOVE_FWD##N);\
-      value_destructor<stored_allocator_type, value_type> d(a, val);\
-      return this->insert_unique(hint, ::boost::move(val));\
+      stored_allocator_traits::construct(a, pval BOOST_MOVE_I##N BOOST_MOVE_FWD##N);\
+      value_destructor<stored_allocator_type, value_type> d(a, *pval);\
+      return this->insert_unique(hint, ::boost::move(*pval));\
    }\
    \
    BOOST_MOVE_TMPL_LT##N BOOST_MOVE_CLASS##N BOOST_MOVE_GT##N \
    iterator emplace_equal(BOOST_MOVE_UREF##N)\
    {\
       typename aligned_storage<sizeof(value_type), alignment_of<value_type>::value>::type v;\
-      value_type &val = *static_cast<value_type *>(static_cast<void *>(v.data));\
+      value_type *pval = reinterpret_cast<value_type *>(v.data);\
       get_stored_allocator_noconst_return_t a = this->get_stored_allocator();\
-      stored_allocator_traits::construct(a, &val BOOST_MOVE_I##N BOOST_MOVE_FWD##N);\
-      value_destructor<stored_allocator_type, value_type> d(a, val);\
-      return this->insert_equal(::boost::move(val));\
+      stored_allocator_traits::construct(a, pval BOOST_MOVE_I##N BOOST_MOVE_FWD##N);\
+      value_destructor<stored_allocator_type, value_type> d(a, *pval);\
+      return this->insert_equal(::boost::move(*pval));\
    }\
    \
    BOOST_MOVE_TMPL_LT##N BOOST_MOVE_CLASS##N BOOST_MOVE_GT##N \
    iterator emplace_hint_equal(const_iterator hint BOOST_MOVE_I##N BOOST_MOVE_UREF##N)\
    {\
       typename aligned_storage <sizeof(value_type), alignment_of<value_type>::value>::type v;\
-      value_type &val = *static_cast<value_type *>(static_cast<void *>(v.data));\
+      value_type *pval = reinterpret_cast<value_type *>(v.data);\
       get_stored_allocator_noconst_return_t a = this->get_stored_allocator();\
-      stored_allocator_traits::construct(a, &val BOOST_MOVE_I##N BOOST_MOVE_FWD##N);\
-      value_destructor<stored_allocator_type, value_type> d(a, val);\
-      return this->insert_equal(hint, ::boost::move(val));\
+      stored_allocator_traits::construct(a, pval BOOST_MOVE_I##N BOOST_MOVE_FWD##N);\
+      value_destructor<stored_allocator_type, value_type> d(a, *pval);\
+      return this->insert_equal(hint, ::boost::move(*pval));\
    }\
    template <class KeyType BOOST_MOVE_I##N BOOST_MOVE_CLASS##N>\
    BOOST_CONTAINER_FORCEINLINE std::pair<iterator, bool>\