commit https://github.com/vim/vim/commit/13ddc5c35921efa69e980284117b6db6465e019c Author: Bram Moolenaar <Bram@vim.org> Date: Wed May 25 22:51:17 2016 +0200 patch 7.4.1847 Problem: Getting an item from a NULL dict crashes. Setting a register to a NULL list crashes. (Nikolai Pavlov, issue https://github.com/vim/vim/issues/768) Comparing a NULL dict with a NULL dict fails. Solution: Properly check for NULL.

" Vim filetype plugin file
" Language:         udev(8) configuration file
" Maintainer:       Nikolai Weibull <now@bitwi.se>
" Latest Revision:  2008-07-09

if exists("b:did_ftplugin")
  finish
endif
let b:did_ftplugin = 1

let s:cpo_save = &cpo
set cpo&vim

let b:undo_ftplugin = "setl com< cms< fo<"

setlocal comments=:# commentstring=#\ %s formatoptions-=t formatoptions+=croql

let &cpo = s:cpo_save
unlet s:cpo_save