CursorHold is blocked while Fern buffer is shwon

[amerov]

how to reproduce:
:autocmd CursorHold * echo 'cursor hold'
it works but stopped after open Fern

version:

NVIM v0.4.3
Build type: Release
LuaJIT 2.0.5
Compilation: /usr/bin/cc -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -O2 -DNDEBUG -DMIN_LOG_LEVEL=3 -Wall -Wextra -pedantic -Wno-unused-parameter -Wstrict-prototypes -std=gnu99 -Wshadow
 -Wconversion -Wmissing-prototypes -Wimplicit-fallthrough -Wvla -fstack-protector-strong -fdiagnostics-color=always -DINCLUDE_GENERATED_DECLARATIONS -D_GNU_SOURCE -DNVIM_MSGPACK_HAS_FLOAT32
 -DNVIM_UNIBI_HAS_VAR_FROM -I/build/neovim/src/build/config -I/build/neovim/src/neovim-0.4.3/src -I/usr/include -I/build/neovim/src/build/src/nvim/auto -I/build/neovim/src/build/include
Compiled by builduser

Features: +acl +iconv +tui
See ":help feature-compile"

UPD: Fern should be open with -drawer option

[lambdalisue]

Could not be reproduced with the following minimal vimrc.
Please find a minimal vimrc to reproduce.

" vim -u ~/.vim/vimrc.min
if has('vim_starting')
  set nocompatible
endif

set packpath=
set runtimepath+=~/.config/nvim/pack/minpac/start/fern.vim

filetype plugin indent on
syntax on

autocmd CursorHold * echo 'cursor hold'

[amerov]

How to reproduce: Open Fern with -drawer option

minimal vimrc:

call plug#begin('~/.local/share/nvim/plugged')
Plug 'lambdalisue/fern.vim'
call plug#end()

filetype plugin indent on
set nocompatible
syntax on
set updatetime=200
autocmd CursorHold * echo 'cursor hold'

[lambdalisue]

Please make it minimal.

[amerov]

Please make it minimal.

edited

[lambdalisue]

Reproduced but it seems that behavior comes from a bug on Neovim itself.
neovim/neovim#12587

Thus I'm not going to apply any modification for this behavior. Please move on to the issue above.
Thanks for the report 👍

[antoinemadec]

@amerov , @lambdalisue , could you please try to use this plugin and tell me if it fixed it?
https://github.com/antoinemadec/FixCursorHold.nvim

[amerov]

@amerov , @lambdalisue , could you please try to use this plugin and tell me if it fixed it?
https://github.com/antoinemadec/FixCursorHold.nvim

It fixed CursorHold blocking, but with this plugin it fire twice

[antoinemadec]

It fixed CursorHold blocking, but with this plugin it fire twice

@amerov , I just fixed it.
Please update FixCursorHold.nvim and let me know 😃

[amerov]

It fixed CursorHold blocking, but with this plugin it fire twice

@amerov , I just fixed it.
Please update FixCursorHold.nvim and let me know

It works.

[bluz71]

This Neovim bug is annoying, it breaks vim-gitgutter when a file is opened by fern and fern remains open. The gitgutter signs will not be emitted. Closing fern will result in the signs be displayed.

The interim fix is to include:

if has("nvim")
  Plug 'antoinemadec/FixCursorHold.nvim'
endif

Hopefully Neovim will be fixed eventually.

[lambdalisue]

Neovim took too long to fix that. Probably we should note users about this in README

[lambdalisue]

Done 8433792

[jonescamilla]

Neovim took too long to fix that. Probably we should note users about this in README

Does this mean that this additional plugin is no longer required? I'm inferring from your statement, it took neovim a long time but the issue has been resolved.

[bluz71]

The Neovim issue is not fixed. It is recommended to use the plugin to workaround the cursor hold issue.

[bluz71]

Note for those concerned, Neovim fixed CursorHold issue 12587 in this PR.

Upcoming Neovim 0.8 (to be released very soon, probably before Oct 2022) will incorporate the fix (which already is in nightly).

Folks who use Neovim nightly or 0.8 can now remove the antoinemadec/FixCursorHold.nvim plugin.