From c148962bd9fda115956d13d4ed600c4880dcc1c8 Mon Sep 17 00:00:00 2001
From: Andrey Semashev <Lastique@users.noreply.github.com>
Date: Mon, 10 Jul 2017 14:57:40 +0300
Subject: [PATCH] Avoid integer overflow on negating distance

---
 include/boost/iterator/reverse_iterator.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/iterator/reverse_iterator.hpp b/include/boost/iterator/reverse_iterator.hpp
index 8446f23..03b7925 100644
--- a/include/boost/iterator/reverse_iterator.hpp
+++ b/include/boost/iterator/reverse_iterator.hpp
@@ -50,7 +50,7 @@ namespace iterators {
 
       void advance(typename super_t::difference_type n)
       {
-          this->base_reference() += -n;
+          this->base_reference() -= n;
       }
 
       template <class OtherIterator>