patch 8.0.1432: after ":copen" can't get the window-ID of the quickfix window commit https://github.com/vim/vim/commit/2ec364e94dbc080ccdf6c5dfc6f1653b5b7ded64 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jan 27 11:52:13 2018 +0100 patch 8.0.1432: after ":copen" can't get the window-ID of the quickfix window Problem: After ":copen" can't get the window-ID of the quickfix window. (FalacerSelene) Solution: Make it work without a quickfix list. Add a test. (Yegappan Lakshmanan, closes #2541)

" Settings for test script execution
" Always use "sh", don't use the value of "$SHELL".
set shell=sh

" Only when the +eval feature is present. 
if 1
  " While some tests overwrite $HOME to prevent them from polluting user files,
  " we need to remember the original value so that we can tell external systems
  " where to ask about their own user settings.
  let g:tester_HOME = $HOME
endif

source setup.vim