neovim-qt with Nvim v0.11.0 shows many "no notification handler registered" warnings

[eyalk11]

Problem

Those come every two seconds from the moment I open nvim . It comes in two flavors Dir and Gui errors.

Everything (i.e. the same profile) works well in nvim 0.10 .

01:28:04 msg_show Error detected while processing VimEnter Autocommands for "*"..function LoadBaseInserts[35]..provider#python3#Call:
01:28:04 msg_show line    1:
01:28:04 msg_show E5108: Error executing lua Vim:no notification handler registered for "Dir"
stack traceback:
	[C]: at 0x7ff7ea9d6840
   Error  01:28:04 msg_show.emsg no notification handler registered for "Gui"
Run ":verbose version" for more info
01:28:20 msg_show   NoiceHistory "[Scratch]" 11 lines --9%--
   Error  01:28:20 msg_show.emsg   NoiceHistory no notification handler registered for "Dir"
01:28:20 msg_show   NoiceHistory no notification handler registered for "Dir"
01:28:20 msg_show   NoiceHistory no notification handler registered for "Gui"
01:28:20 msg_show "[Scratch]" 11 lines --9%--
   Error  01:28:21 msg_show.emsg no notification handler registered for "Gui"
01:28:21 msg_show "[Scratch]" 11 lines --18%--
   Error  01:28:21 msg_show.emsg no notification handler registered for "Gui"


It is really not debugable this way. 


01:28:06 msg_show   version NVIM v0.11.0-dev-250+g61aabe073
01:28:06 msg_show   version Build type: RelWithDebInfo
01:28:06 msg_show   version LuaJIT 2.1.1716656478

Steps to reproduce

my neovim profile

Expected behavior

Works

Neovim version (nvim -v)

NVIM v0.11.0-dev-250+g61aabe073

Vim (not Nvim) behaves the same?

no idea

Operating system/version

Windows

Terminal name/version

nvim-qt

$TERM environment variable

unk

Installation

nightly

[eyalk11]

#8053
I tried UpdateRemotePlugins

[eyalk11]

After removing neovim-gui-shim it seems to be solved.

[doctorcolossus]

I have also been getting this behavior since upgrading to nvim 0.11 with ppa:neovim-ppa/unstable.

For me, this is triggered by Shougo/deoplete.nvim and has prevented its usage since upgrading nvim.

no notification handler registered for "Dir"
no notification handler registered for "Gui"
no notification handler registered for "Gui"
no notification handler registered for "Gui"

on startup if g:deoplete#enable_at_startup = 1, and then no notification handler registered for "Gui" after each keystroke in insert mode with deoplete enabled.

I experience this issue with the following exact package pairs from the aforementioned PPA:

• neovim_0.10.0~ubuntu1+git202405231042-5ac8db10f0-971e32c878-ae791be74d~ubuntu22.04.1_amd64.deb
  + neovim-runtime_0.10.0~ubuntu1+git202405231042-5ac8db10f0-971e32c878-ae791be74d~ubuntu22.04.1_all.deb
• neovim_0.10.0~ubuntu1+git202406061035-78d3f47428-971e32c878-e49086af09~ubuntu22.04.1_amd64.deb
  + neovim-runtime_0.10.0~ubuntu1+git202406061035-78d3f47428-971e32c878-e49086af09~ubuntu22.04.1_all.deb
• neovim_0.10.0~ubuntu1+git202406171035-20a7eebec0-971e32c878-07c51fccd2~ubuntu22.04.1_amd64.deb
  + neovim-runtime_0.10.0~ubuntu1+git202406171035-20a7eebec0-971e32c878-07c51fccd2~ubuntu22.04.1_all.deb

Despite the package names above containing the text "0.10.0", they do actually provide nvim 0.11.

Uninstalling, removing the PPA, and downgrading to 0.10 with the deb file provided here resolves the regression for me. Thanks to @eyalk11 for pointing out that nvim 0.11 is the problem. I had spent months without my deoplete autocompletion and a lot of time trying to figure out what had been wrong with it, so happy to have it working again now and hope this can be fixed in subsequent neovim versions.

[justinmk]

This is because something is broadcasting an event via rpcnotify(0, ...) and neovim-qt is showing this warning. equalsraf/neovim-qt#1112

Nvim-qt should just not show that warning.

For reference, this was indirectly caused by #28487 . I expected some issues like this, but so far only nvim-qt seems to be doing this kind of thing (complaining when it sees an unknown event). So I'm hoping that nvim-qt will change its behavior to quietly ignore unknown events.