From 98494420c5d9fbf10045faa7b6dc23aa1e0081d1 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Tue, 18 Jan 2022 20:52:05 +0200
Subject: [PATCH] Add a BOOST_ASSERT to mix64_policy to check that the
 bucket_count is a power of two

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

diff --git a/include/boost/unordered/detail/implementation.hpp b/include/boost/unordered/detail/implementation.hpp
index a7bb863c..2de4c9a8 100644
--- a/include/boost/unordered/detail/implementation.hpp
+++ b/include/boost/unordered/detail/implementation.hpp
@@ -2018,6 +2018,7 @@ namespace boost {
 
         static inline SizeT to_bucket(SizeT bucket_count, SizeT hash)
         {
+          BOOST_ASSERT( boost::core::has_single_bit( bucket_count ) );
           return hash & (bucket_count - 1);
         }