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:	groovy
" Maintainer:	Justin M. Keyes <justinkz@gmail.com>
" Last Change:	2016 May 22

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

let s:cpo_save = &cpo
set cpo-=C

let b:undo_ftplugin = 'setlocal commentstring<'

setlocal commentstring=//%s

let &cpo = s:cpo_save
unlet s:cpo_save