From 7bcfbd055c19c2cf37f5dd64a7e532eb38585052 Mon Sep 17 00:00:00 2001
From: Maxime Coste <mawww@kakoune.org>
Date: Sun, 11 Jun 2017 12:24:45 +0100
Subject: [PATCH] Fix corner case in compute_modified_ranges

---
 src/selection.cc                         | 2 +-
 test/regression/0-undo-change-at-eof/cmd | 1 +
 test/regression/0-undo-change-at-eof/in  | 2 ++
 test/regression/0-undo-change-at-eof/out | 2 ++
 4 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 test/regression/0-undo-change-at-eof/cmd
 create mode 100644 test/regression/0-undo-change-at-eof/in
 create mode 100644 test/regression/0-undo-change-at-eof/out

diff --git a/src/selection.cc b/src/selection.cc
index 4724e896..14879386 100644
--- a/src/selection.cc
+++ b/src/selection.cc
@@ -183,7 +183,7 @@ Vector<Selection> compute_modified_ranges(Buffer& buffer, size_t timestamp)
     }
 
     auto touches = [&](const Selection& lhs, const Selection& rhs) {
-        return buffer.char_next(lhs.max()) >= rhs.min();
+        return lhs.max() == end_coord or buffer.char_next(lhs.max()) >= rhs.min();
     };
     size_t dummy = 0;
     ranges.erase(merge_overlapping(ranges.begin(), ranges.end(), dummy, touches), ranges.end());
diff --git a/test/regression/0-undo-change-at-eof/cmd b/test/regression/0-undo-change-at-eof/cmd
new file mode 100644
index 00000000..b2bb8707
--- /dev/null
+++ b/test/regression/0-undo-change-at-eof/cmd
@@ -0,0 +1 @@
+<a-l>yjxRu
diff --git a/test/regression/0-undo-change-at-eof/in b/test/regression/0-undo-change-at-eof/in
new file mode 100644
index 00000000..cc60e6f5
--- /dev/null
+++ b/test/regression/0-undo-change-at-eof/in
@@ -0,0 +1,2 @@
+copy
+paste
diff --git a/test/regression/0-undo-change-at-eof/out b/test/regression/0-undo-change-at-eof/out
new file mode 100644
index 00000000..cc60e6f5
--- /dev/null
+++ b/test/regression/0-undo-change-at-eof/out
@@ -0,0 +1,2 @@
+copy
+paste