patch 8.2.2463: using :arglocal in an autocommand may use freed memory Commit: https://github.com/vim/vim/commit/6bcb877ec19a647443195a54eeac60cb693fd827 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Feb 3 21:23:29 2021 +0100 patch 8.2.2463: using :arglocal in an autocommand may use freed memory Problem: Using :arglocal in an autocommand may use freed memory. (houyunsong) Solution: Check if the arglist is locked.

" For Yiddish capitals should not be checked.  But only change the
" 'spellcapcheck' option when it is not at its default value.
let s:spc = &l:spc
setlocal spc&
if s:spc == &l:spc
  setlocal spc=
else
  let &l:spc = s:spc
endif
unlet s:spc