patch 8.2.3237: when a builtin function gives an error processing continues Commit: https://github.com/vim/vim/commit/327d3ee4557027b51aad86e68743a85ed3a6f52b Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jul 28 19:34:14 2021 +0200 patch 8.2.3237: when a builtin function gives an error processing continues Problem: When a builtin function gives an error processing continues. Solution: In Vim9 script return FAIL in get_func_tv().

" Vim syntax file
" Language:  systemd.unit(5)

if !exists('b:current_syntax')
  " Looks a lot like dosini files.
  runtime! syntax/dosini.vim
  let b:current_syntax = 'systemd'
endif