patch 9.0.1317: crash when using an unset object variable Commit: https://github.com/vim/vim/commit/552bdca781bd202012224316ffae3439aac83b7b Author: Bram Moolenaar <Bram@vim.org> Date: Fri Feb 17 21:08:50 2023 +0000 patch 9.0.1317: crash when using an unset object variable Problem: Crash when using an unset object variable. Solution: Give an error instead. (closes https://github.com/vim/vim/issues/12005)

" Provide 'PrintVer' command to print the interface versions.

func s:print_ver(lang, ...)
  if has(a:lang)
    exec a:lang join(a:000)
  else
    echo 'N/A'
  endif
  echo ''
endfunc

command -nargs=+ PrintVer call <SID>print_ver(<f-args>)