NeoVim hangs after the completion

[YingboMa]

NeoVim hangs forever after the completion pops up.

[oxinabox]

Could you try disableing all your other plugins, except
this and deomplete?

I can't think for sure how they could be interfering, but lets rule that out first.

[YingboMa]

I finally find out the cause of it. It only happens when I enable the super tab behavior of neosnippet plugin.

" SuperTab like snippets behavior.
   imap <expr><TAB> neosnippet#expandable_or_jumpable() ?
   \ "\<Plug >(neosnippet_expand_or_jump)"
   \: pumvisible() ? "\<C-n>" : "\<TAB>"
   smap <expr><TAB> neosnippet#expandable_or_jumpable() ?
   \ "\<Plug >(neosnippet_expand_or_jump)"
   \: "\<TAB>"

[oxinabox]

I can indeed reproduce that.
If you change it to:

"Super tab like snippet behavour
inoremap <expr><TAB>
 \ pumvisible() ? "\<C-n>" :
 \ neosnippet#expandable_or_jumpable() ?
 \    "\<Plug>(neosnippet_expand_or_jump)" : "\<TAB>"
snoremap <expr><TAB> neosnippet#expandable_or_jumpable() ?
\ "\<Plug>(neosnippet_expand_or_jump)" : "\<TAB>"

it works, without hanging.
I believe the call of \<TAB> causes an infinite loop.
So noremap stops the map triggering maps.
But I am not sure if that is behavior you are relying on.

@Shougo may have some insight on this.

[Shougo]

I believe the call of \<TAB> causes an infinite loop.

I think so, too.
I will check it.

[Shougo]

I have tested it with the minimal init.vim.
But I cannot reproduce it :-(

@YingboMa Please create the minimal init.vim and reproduce ways from neovim starting.
I will test it.

[YingboMa]

This is my minimal init.vim that can reproduce the problem.

" Plugins
call plug#begin('~/.vim/plugged')
 Plug 'Shougo/deoplete.nvim'
 Plug 'JuliaEditorSupport/deoplete-julia'
 Plug 'JuliaEditorSupport/julia-vim'
 Plug 'Shougo/neosnippet.vim'
 Plug 'Shougo/neosnippet-snippets'
call plug#end()

" Snippets
  let g:neosnippet#enable_snipmate_compatibility = 1
  let g:neosnippet#expand_word_boundary = 1
  imap <C-k>     <Plug>(neosnippet_expand_or_jump)
  smap <C-k>     <Plug>(neosnippet_expand_or_jump)
  xmap <C-k>     <Plug>(neosnippet_expand_target)

" SuperTab like snippets behavior.
  imap <expr><TAB> neosnippet#expandable_or_jumpable() ?
    \ "\<Plug >(neosnippet_expand_or_jump)"
    \: pumvisible() ? "\<C-n>" : "\<TAB>"
    smap <expr><TAB> neosnippet#expandable_or_jumpable() ?
    \ "\<Plug >(neosnippet_expand_or_jump)"
    \: "\<TAB>"

Then, use NeoVim to open a xxx.jl file and type

function <TAB>

Neovim will freeze.

[Shougo]

OK. I will test it.

[oxinabox]

julia.vim also binds the TAB key, doesn't it -- for latex/unicode subsitutions.

@Shougo when reproducing, the hang might not occur until deoplete-julia has finished generating its completions lists from the julia standard libraries. Which might take 5 minutes from first startup.

@YingboMa does changing to using nore maps fix it for you?
And does this break something else?

[Shougo]

I cannot reproduce the minimal init.vim and the reproduce ways.

I think it should be:

" Plugins
call plug#begin('~/.vim/plugged')
 Plug 'Shougo/deoplete.nvim'
 Plug 'JuliaEditorSupport/deoplete-julia'
 Plug 'JuliaEditorSupport/julia-vim'
 Plug 'Shougo/neosnippet.vim'
 Plug 'Shougo/neosnippet-snippets'
call plug#end()

" Snippets
  let g:deoplete#enable_at_startup = 1
  let g:neosnippet#enable_snipmate_compatibility = 1
  let g:neosnippet#expand_word_boundary = 1
  imap <C-k>     <Plug>(neosnippet_expand_or_jump)
  smap <C-k>     <Plug>(neosnippet_expand_or_jump)
  xmap <C-k>     <Plug>(neosnippet_expand_target)

" SuperTab like snippets behavior.
  imap <expr><TAB> neosnippet#expandable_or_jumpable() ?
    \ "\<Plug>(neosnippet_expand_or_jump)"
    \: pumvisible() ? "\<C-n>" : "\<TAB>"
    smap <expr><TAB> neosnippet#expandable_or_jumpable() ?
    \ "\<Plug>(neosnippet_expand_or_jump)"
    \: "\<TAB>"

[YingboMa]

@oxinabox No, it did not fix the problem.

[Shougo]

Your minimal init.vim works for me.
So, it is not problem...

[YingboMa]

@Shougo I tried it again. It still hangs... By the way, did you install Julia language?

[Shougo]

Yes. Julia completion works well.

[dragon788]

Anything system locale specific that could be causing this? Try setting the current shell locale to En.UTF-8 and see if it still happens and then switch back to whatever your current system locale is?

[YingboMa]

@dragon788 Thank you for the advice. Unfortunately, it still does not fix the problem.

[elsuizo]

i got the same problem. If disabled 'JuliaEditorSupport/julia-vim'
deoplete-julia works

[elsuizo]

confirm using old 'JuliaEditorSupport/julia-vim' like this:
https://github.com/ajpaulson/julia-syntax.vim
all works fine again

[Shougo]

Is this 'JuliaEditorSupport/julia-vim' problem?
But I cannot reproduce it.
You can find the reason though...

[YingboMa]

It still hangs after I use 'ajpaulson/julia-syntax.vim'.....

[oxinabox]

I've been away, but am back now.
I really thought noremap would eliminate it.

It seems like all @elsuizo and @YingboMa have different problems,
since @elsuizo can solve by using the older version 'ajpaulson/julia-syntax.vim without the Tab based latex replacement feature (right?)
and @YingboMa can not solve it this way (Unless there was a mistake in removing the old version? I've made that mistake before).

Are both using same minimal rc?

I am pretty sure this comes down to the
SuperTab like snippets behavior.
If that section is removed it from vimrc it all goes away, right?

[YingboMa]

@oxinabox Exactly, it doesn't have that problem after I remove it.