patch 8.2.3650: Vim9: for loop variable can be a list member Commit: https://github.com/vim/vim/commit/3b3755fe19e9ded2a1c45f14b2c6fa065bcaf2c6 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Nov 22 20:10:18 2021 +0000 patch 8.2.3650: Vim9: for loop variable can be a list member Problem: Vim9: for loop variable can be a list member. Solution: Check for valid variable name. (closes https://github.com/vim/vim/issues/9179)

" Vim filetype plugin
" Language:      ART-IM and ART*Enterprise
" Maintainer:    Dorai Sitaram <ds26@gte.com>
" URL:		 http://www.ccs.neu.edu/~dorai/vimplugins/vimplugins.html
" Last Change:   Apr 2, 2003

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

run ftplugin/lisp.vim

setl lw-=if
setl lw+=def-art-fun,deffacts,defglobal,defrule,defschema,for,schema,while