patch 8.0.1276: key lost when window closed in exit callback commit https://github.com/vim/vim/commit/a3f7e58bf846b28b347a5d5b96c2d829871bd212 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Nov 9 13:21:58 2017 +0100 patch 8.0.1276: key lost when window closed in exit callback Problem: Typed key is lost when the terminal window is closed in exit callback. (Gabriel Barta) Solution: When the current window changes bail out of the wait loop. (closes #2302)

" 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