commit https://github.com/vim/vim/commit/0a38dd29d6f65aa601162542a5ab0ba7f308fc8e Author: Bram Moolenaar <Bram@vim.org> Date: Tue Aug 25 16:49:01 2015 +0200 patch 7.4.836 Problem: Accessing unitinialized memory. Solution: Add missing calls to init_tv(). (Dominique Pelle)

" 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