commit https://github.com/vim/vim/commit/a96909cfaf21dbbf033e904ccdcda9905799f0fc Author: Bram Moolenaar <Bram@vim.org> Date: Sat Mar 5 22:19:41 2016 +0100 patch 7.4.1496 Problem: Crash when built with GUI but it's not active. (Dominique Pelle) Solution: Check gui.in_use.

" 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