From 76b181f0242d2c2cc467ae080ed0584287e92993 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ion=20Gazta=C3=B1aga?= <igaztanaga@gmail.com>
Date: Sat, 29 Sep 2018 09:58:52 +0200
Subject: [PATCH] Make some sanitizers happier avoiding wraparound.

---
 include/boost/container/detail/allocator_version_traits.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/boost/container/detail/allocator_version_traits.hpp b/include/boost/container/detail/allocator_version_traits.hpp
index 18460bd..d037e0e 100644
--- a/include/boost/container/detail/allocator_version_traits.hpp
+++ b/include/boost/container/detail/allocator_version_traits.hpp
@@ -93,7 +93,8 @@ struct allocator_version_traits<Allocator, 1>
    {
       size_type n = holder.size();
       typename multiallocation_chain::iterator it = holder.begin();
-      while(n--){
+      while(n){
+         --n;
          pointer p = boost::intrusive::pointer_traits<pointer>::pointer_to(*it);
          ++it;
          a.deallocate(p, 1);