patch 8.2.3422: Vim9: no failure if return type differs from returned var Commit: https://github.com/vim/vim/commit/efc084e3353d6854b6dac8b240f70cb0abb838ad Author: Bram Moolenaar <Bram@vim.org> Date: Thu Sep 9 22:30:52 2021 +0200 patch 8.2.3422: Vim9: no failure if return type differs from returned var Problem: Vim9: no failure if return type differs from returned variable. Solution: Copy type when copying a list. (closes https://github.com/vim/vim/issues/8847)

" 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