patch 8.2.1454: Vim9: failure invoking lambda with wrong arguments Commit: https://github.com/vim/vim/commit/79e8db9a218ef111934594024a5cd8b1f93acada Author: Bram Moolenaar <Bram@vim.org> Date: Fri Aug 14 22:16:33 2020 +0200 patch 8.2.1454: Vim9: failure invoking lambda with wrong arguments Problem: Vim9: failure invoking lambda with wrong arguments. Solution: Handle invalid arguments. Add a test.

" 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>)