commit https://github.com/vim/vim/commit/a96909cfaf21dbbf033e904ccdcda9905799f0fc Author: Bram Moolenaar <Bram@vim.org> Date: Sat Mar 5 22:19:41 2016 +0100 patch 7.4.1496 Problem: Crash when built with GUI but it's not active. (Dominique Pelle) Solution: Check gui.in_use.

" 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