commit https://github.com/vim/vim/commit/e429e70f050cb2941f1f8427cf918b68444c904e Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jun 10 19:49:14 2016 +0200 patch 7.4.1914 Problem: Executing autocommands while using the signal stack has a high chance of crashing Vim. Solution: Don't invoke autocommands when on the signal stack.

" Vim filetype plugin file
" Language:	Diff
" Maintainer:	Bram Moolenaar <Bram@vim.org>
" Last Change:	2005 Jul 27

" Only do this when not done yet for this buffer
if exists("b:did_ftplugin")
  finish
endif
let b:did_ftplugin = 1

let b:undo_ftplugin = "setl modeline<"

" Don't use modelines in a diff, they apply to the diffed file
setlocal nomodeline