From 4a42c93897267f9bad4d52944a64a39704b3ad48 Mon Sep 17 00:00:00 2001
From: LeonineKing1199 <christian.mazakas@gmail.com>
Date: Fri, 3 Dec 2021 10:07:57 -0800
Subject: [PATCH] Fix erroneous usage of `table::hash()` impl which implicitly
 copy-constructs the `const_key_type`

---
 include/boost/unordered/detail/implementation.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/unordered/detail/implementation.hpp b/include/boost/unordered/detail/implementation.hpp
index fe1d0023..f4874d57 100644
--- a/include/boost/unordered/detail/implementation.hpp
+++ b/include/boost/unordered/detail/implementation.hpp
@@ -4064,7 +4064,7 @@ namespace boost {
           if (!this->size_)
             return 0;
 
-          std::size_t key_hash = this->hash(k);
+          std::size_t key_hash = policy::apply_hash(this->hash_function(), k);
           std::size_t bucket_index = this->hash_to_bucket(key_hash);
 
           link_pointer prev =