commit https://github.com/vim/vim/commit/46c85439c966d7ed39fb3d711d4d6c61ac964647 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Feb 26 11:17:46 2016 +0100 patch 7.4.1422 Problem: Error when reading fails uses wrong errno. Keeping channel open after job stops results in test failing. Solution: Move the error up. Add ch_job_killed.

" Settings for test script execution
" Always use "COMMAND.COM", don't use the value of "$SHELL".
set shell=c:\COMMAND.COM shellquote= shellxquote= shellcmdflag=/c shellredir=>
" This is used only when the +eval feature is available.
if executable("cmd.exe")
   set shell=cmd.exe
endif