commit 9ec7fa82a2c4f0283862ed704c2940959e6130ee
author Bram Moolenaar <Bram@vim.org> Tue Oct 18 13:06:41 2016 +0200
committer Bram Moolenaar <Bram@vim.org> Tue Oct 18 13:06:41 2016 +0200
tree a4cda9c0f003b8283a8625f245bc4964087e28bb
parent cbd3bd6cbed5baf418b037b17ad46e339ff59174

patch 8.0.0043
Problem:    When using Insert mode completion with 'completeopt' containing
            "noinsert" with CTRL-N the change is not saved for undo.  (Tommy
            Allen)
Solution:   Call stop_arrow() before inserting for any key.

src/testdir/test_popup.vim

diff --git a/src/testdir/test_popup.vim b/src/testdir/test_popup.vim
index d037b7a..cc93ff8 100644
--- a/src/testdir/test_popup.vim
+++ b/src/testdir/test_popup.vim
@@ -427,6 +427,11 @@
   call feedkeys("u", 'xt')
   call assert_equal('bbb', getline(2))
 
+  call feedkeys("A\<Right>\<C-N>\<Esc>", 'xt')
+  call assert_equal('January', getline(2))
+  call feedkeys("u", 'xt')
+  call assert_equal('bbb', getline(2))
+
   iunmap <Right>
   set completeopt&
   q!