From c5f64ed1d3264fb894debbe790744ef963641af1 Mon Sep 17 00:00:00 2001
From: Christian Mazakas <christian.mazakas@gmail.com>
Date: Wed, 16 Aug 2023 10:22:08 -0700
Subject: [PATCH] Prevent erroneous copying of groups data, update max load to
 properly propagate

---
 include/boost/unordered/detail/foa/core.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/boost/unordered/detail/foa/core.hpp b/include/boost/unordered/detail/foa/core.hpp
index 239d05d3..7ae9f2c8 100644
--- a/include/boost/unordered/detail/foa/core.hpp
+++ b/include/boost/unordered/detail/foa/core.hpp
@@ -1870,9 +1870,10 @@ private:
 
   void fast_copy_elements_from(const table_core& x)
   {
-    if(arrays.elements){
+    if(arrays.elements&&x.arrays.elements){
       copy_elements_array_from(x);
       copy_groups_array_from(x);
+      size_ctrl.ml=std::size_t(x.size_ctrl.ml);
       size_ctrl.size=std::size_t(x.size_ctrl.size);
     }
   }