From 71bf336c9dca1c51c3149e3cae09c44638ce2d58 Mon Sep 17 00:00:00 2001
From: Christian Mazakas <christian.mazakas@gmail.com>
Date: Tue, 7 Feb 2023 10:08:58 -0800
Subject: [PATCH] Add missing empty_ initialization to move constructor of
 node_type

---
 include/boost/unordered/unordered_node_map.hpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/boost/unordered/unordered_node_map.hpp b/include/boost/unordered/unordered_node_map.hpp
index c215f4f3..9d046861 100644
--- a/include/boost/unordered/unordered_node_map.hpp
+++ b/include/boost/unordered/unordered_node_map.hpp
@@ -79,7 +79,7 @@ namespace boost {
         }
 
         template <class A>
-        static void construct(A&, element_type* p, element_type&& x)
+        static void construct(A&, element_type* p, element_type&& x) noexcept
         {
           p->p = x.p;
           x.p = nullptr;
@@ -171,10 +171,15 @@ namespace boost {
 
         node_handle(node_handle&& nh) noexcept
         {
+          // neither of these move constructors are allowed to throw exceptions
+          // so we can get away with rote placement new
+          //
           new (a) Allocator(std::move(nh.al()));
           type_policy::construct(al(), reinterpret_cast<element_type*>(x),
             type_policy::move(nh.element()));
 
+          empty_ = false;
+
           reinterpret_cast<Allocator*>(nh.a)->~Allocator();
           nh.empty_ = true;
         }