patch 8.0.0522: Win32: when 'clipboard' is "unnamed" yyp does not work commit https://github.com/vim/vim/commit/3fcfa35f82b9d1ef5e95051b3a45578e10c14ec3 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Mar 29 19:20:41 2017 +0200 patch 8.0.0522: Win32: when 'clipboard' is "unnamed" yyp does not work Problem: MS-Windows: when 'clipboard' is "unnamed" yyp does not work in a :global command. Solution: When setting the clipboard was postponed, do not clear the register.

" Tests for the Tcl interface.

if !has('tcl')
  finish
end

function Test_tcldo()
  " Check deleting lines does not trigger ml_get error.
  new
  call setline(1, ['one', 'two', 'three'])
  tcldo ::vim::command %d_
  bwipe!

  " Check switching to another buffer does not trigger ml_get error.
  new
  let wincount = winnr('$')
  call setline(1, ['one', 'two', 'three'])
  tcldo ::vim::command new
  call assert_equal(wincount + 1, winnr('$'))
  bwipe!
  bwipe!
endfunc