patch 8.1.0066: nasty autocommand causes using freed memory commit https://github.com/vim/vim/commit/c3ffc9b8d3015dc5280b297b4e3deb4f34944bd4 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jun 17 17:32:58 2018 +0200 patch 8.1.0066: nasty autocommand causes using freed memory Problem: Nasty autocommand causes using freed memory. (Dominique Pelle) Solution: Do not force executing autocommands if the value of 'syntax' or 'filetype' did not change.

" Vim support file to switch off loading plugins for file types
"
" Maintainer:	Bram Moolenaar <Bram@vim.org>
" Last Change:	2011 Oct 20

if exists("did_load_ftplugin")
  unlet did_load_ftplugin
endif

" Remove all autocommands in the filetypeplugin group, if any exist.
if exists("#filetypeplugin")
  silent! au! filetypeplugin *
endif