let $LANG = 'C'
set nocompatible

set rtp^=C:/work/vim/denops.vim
set rtp^=C:/work/vim/ddu.vim
set rtp^=C:/work/vim/ddu-ui-ff
set rtp^=C:/work/vim/ddu-kind-word
set rtp^=C:/work/vim/ddu-source-action
set rtp^=C:/work/vim/ddu-source-callbackfreeze

call ddu#custom#patch_global(#{ ui: 'ff' })

augroup my-ddu-ff
  autocmd!
  autocmd FileType ddu-ff call SetupDduFF()
augroup END

function! SetupDduFF() abort
  nnoremap <buffer><nowait> a  <Cmd>call ddu#ui#do_action('chooseAction')<CR>
  nnoremap <buffer><nowait> q  <Cmd>call ddu#ui#do_action('quit')<CR>
endfunction

function! Test() abort
  " Start source-callbackfreeze and ui-ff is shown.
  call ddu#start(#{ sources: [#{ name: 'callbackfreeze' }] })

  " Press 'a' in ui-ff and source-acition is shown.
  call timer_start(2000, {_ -> feedkeys('a')})

  " Press 'q' in ui-ff and source-acition is quit.
  " Then source-callbackfreeze shows again and refresh data.
  " But refresh process deadlocks and Vim freezes.
  call timer_start(4000, {_ -> feedkeys('q')})

  " The error is caused by source-callbackfreeze timeout.
endfunction