Coc.nvim: Some plugin change completeopt on insert mode (but I have no plugin except for coc.nvim itself)

[shanehou]

Result from CocInfo

## versions

vim version: VIM - Vi IMproved 8.2 (2019 Dec 12, compiled Feb 19 2020 21:05:46)
node version: v12.2.0
coc.nvim version: 0.0.74-d57f450e8d
term: dumb
platform: linux

## Messages
Messages maintainer: Bram Moolenaar <[email protected]>

Error detected while processing function <SNR>2_lod_cmd:
line    3:
E580: :endif without :if:  endif


"mmpayinvoicecomm/nonpay_quota/nonpay_quota.cpp" 304L, 13507C
match 1 of 12
match 1 of 6
Pattern not found
[coc.nvim] error: Some plugin change completeopt on insert mode!
[coc.nvim] error: Some plugin change completeopt on insert mode!
## Output channel: snippets

Describe the bug

C++ autocomplete keeps saying "Some plugin change completeopt on insert mode!", but I tried removing all my plugins and the problem remains.

Reproduce the bug

• Create file mini.vim with：

  call plug#begin()
  Plug 'neoclide/coc.nvim', {'branch': 'release'}
  call plug#end()
  
  set nocompatible
  set hidden
  set nobackup
  set nowritebackup
  set cmdheight=2
  set updatetime=300
  set shortmess+=c
  set signcolumn=yes
  

• Start (neo)vim with command: vim -u example.cpp

• Operate vim.

Screenshots (optional)

If applicable, add screenshots to help explain your problem.

[fannheyward]

Check by :verbose set completeopt?, this will shows who changes completeopt.
`

[shanehou]

Check by :verbose set completeopt?, this will shows who changes completeopt.
`

Well, looks like it was set by coc itself

[chemzqm]

You should try vim -u mini.vim example.cpp

[shanehou]

You should try vim -u mini.vim example.cpp

Yes I tried it.

:verbose set completeopt? firstly only showed completeopt=preview,menuone when I just opened the file. If I wrote a variable and hit ., the "some plugin" tip would show up, then :verbose set completeopt? would show an extra line saying Last set from ~/.vim/pack/coc/start/coc.nvim-release/autoload/coc/api.vim line 110.

BTW, :: behaved well, but . and -> would always shows the tip.

[oblitum]

BTW, :: behaved well, but . and -> would always shows the tip.

Are you getting c++ server completion? If yes, you're not showing your real configuration, and your mini.vim isn't corresponding.

We can't reproduce this, as there's no indication from your report including anything in special that would cause this, and no one else have hit it.

[chemzqm]

Try disable coc.nvim and check out :verbose set completeopt? after insert some text.

[shanehou]

Try disable coc.nvim and check out :verbose set completeopt? after insert some text.

Maybe I loaded coc twice?

[shanehou]

And if I rename pack directory, vim would show:

If I also moved omni out of autoload, it'll show: completeopt=menu,preview

[shanehou]

Ah I see. I installed omnicppcomplete long time ago, and it interferes with other plugins. I deleted related files and it worked like a charm!

[shanehou]

What I still don't understand: https://github.com/neoclide/coc.nvim/wiki/Install-coc.nvim

Do I have to use vim-plug and Automation script (use pack) simultaneously?

[chemzqm]

All you need is checkout release branch and add it to rtp of vim.

[jay-khatri]

deoplete was interfering for me.