commit https://github.com/vim/vim/commit/b2658a1ab02cd0ba848164f70c7c464fdc398162 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Apr 26 17:16:24 2016 +0200 patch 7.4.1787 Problem: When a job ends the close callback is invoked before other callbacks. On Windows the close callback is not called. Solution: First invoke out/err callbacks before the close callback. Make the close callback work on Windows.

" Tests for :undo

func Test_ex_undo()
  new ex-undo
  setlocal ul=10
  exe "normal ione\n\<Esc>"
  setlocal ul=10
  exe "normal itwo\n\<Esc>"
  setlocal ul=10
  exe "normal ithree\n\<Esc>"
  call assert_equal(4, line('$'))
  undo
  call assert_equal(3, line('$'))
  undo 1
  call assert_equal(2, line('$'))
  undo 0
  call assert_equal(1, line('$'))
  quit!
endfunc