commit https://github.com/vim/vim/commit/1610d052413e0ed664498853a47acc2d677a22d1 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jun 9 22:53:01 2016 +0200 patch 7.4.1913 Problem: When ":doautocmd" is used modelines are used even when no autocommands were executed. (Daniel Hahler) Solution: Skip processing modelines. (closes https://github.com/vim/vim/issues/854)

--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -3096,7 +3096,7 @@ do_write(exarg_T *eap)
 	    {
 		if (au_has_group((char_u *)"filetypedetect"))
 		    (void)do_doautocmd((char_u *)"filetypedetect BufRead",
-									TRUE);
+								  TRUE, NULL);
 		do_modelines(0);
 	    }