From c9340390b00be65aad99447bf817592a28810987 Mon Sep 17 00:00:00 2001
From: joaquintides <joaquin@tid.es>
Date: Tue, 18 Oct 2022 17:28:57 +0200
Subject: [PATCH] completed previous commit

---
 include/boost/unordered/detail/foa.hpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/include/boost/unordered/detail/foa.hpp b/include/boost/unordered/detail/foa.hpp
index 827c22c2..114f94c5 100644
--- a/include/boost/unordered/detail/foa.hpp
+++ b/include/boost/unordered/detail/foa.hpp
@@ -1458,6 +1458,13 @@ private:
     alloc_traits::destroy(al(),p);
   }
 
+  struct destroy_on_exit
+  {
+    ~destroy_on_exit(){this_->destroy_element(p);}
+    table* this_;
+    value_type* p;
+  };
+
   std::size_t max_load()const
   {
     static constexpr std::size_t small_capacity=2*N-1;
@@ -1688,9 +1695,10 @@ private:
   void nosize_transfer_element(value_type* p,const arrays_type& arrays_)
   {
     auto hash=hash_for(key_from(*p));
+    destroy_on_exit d{this,p};
+    (void)d; /* ununsed var warning */
     nosize_unchecked_emplace_at(
       arrays_,position_for(hash,arrays_),hash,type_policy::move(*p));
-    destroy_element(p);
   }
 
   template<typename... Args>