From d238707e6df9ee0aa91712df3d5aa0fd34e4b2bf Mon Sep 17 00:00:00 2001
From: Maxime Coste <frrrwww@gmail.com>
Date: Tue, 30 Apr 2013 19:01:10 +0200
Subject: [PATCH] Fix UndoGroupOptimizer

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

diff --git a/src/buffer.cc b/src/buffer.cc
index 068bf55f..14507528 100644
--- a/src/buffer.cc
+++ b/src/buffer.cc
@@ -348,6 +348,7 @@ class UndoGroupOptimizer
             {
                 ByteCount overlaps_len = it->content.length() - pos;
                 it->content = it->content.substr(0, pos);
+                it_next->coord = advance(it_next->coord, it_next->content.substr(0, overlaps_len));
                 it_next->content = it_next->content.substr(overlaps_len);
                 ++it, ++it_next;
                 progress = true;