patch 8.0.0581: moving folded text is sometimes not correct commit https://github.com/vim/vim/commit/94be619e30e82d28cadeea5e0766c6f5c321ff8b Author: Bram Moolenaar <Bram@vim.org> Date: Sat Apr 22 22:40:11 2017 +0200 patch 8.0.0581: moving folded text is sometimes not correct Problem: Moving folded text is sometimes not correct. Solution: Bail out when "move_end" is zero. (Matthew Malcomson)

func Test_yank_put_clipboard()
  new
  call setline(1, ['a', 'b', 'c'])
  set clipboard=unnamed
  g/^/normal yyp
  call assert_equal(['a', 'a', 'b', 'b', 'c', 'c'], getline(1, 6))

  set clipboard&
  bwipe!
endfunc