From fbffd86f85445623a6a8981a93d8a9f763d98af7 Mon Sep 17 00:00:00 2001
From: Maxime Coste <mawww@kakoune.org>
Date: Wed, 19 Jul 2017 08:40:17 +0200
Subject: [PATCH] Add an assert to try to get more info on #1506

---
 src/selection.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/selection.cc b/src/selection.cc
index 5c8f2707..a2c53b59 100644
--- a/src/selection.cc
+++ b/src/selection.cc
@@ -112,6 +112,7 @@ Iterator merge_overlapping(Iterator begin, Iterator end, size_t& main, OverlapsF
                 begin[i] = std::move(begin[j]);
         }
     }
+    kak_assert(std::is_sorted(begin, begin + i +1, compare_selections));
     return begin + i + 1;
 }