commit https://github.com/vim/vim/commit/b36287283781e09d8874157b9d9bdc5243a2f319 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 28 14:56:39 2016 +0100 patch 7.4.1445 Problem: Memory corruption when 'encoding' is not utf-8. Solution: Convert decoded string later.

" 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