Gnvim is broken for nvim 0.9+ about gnvim

[vhakulinen]

Which nvim version are you using? Latest I've used gnvim with is 0.8.3. There could be some changes to newer versions of nvim that gnvim fails to handle.

[kGAr6Naaes]

It's version 0.10.0, compiled from the main branch

NVIM v0.10.0-dev-132+ge81331c2b
Build type: RelWithDebInfo
LuaJIT 2.1.0-beta3
...

[TinusgragLin]

It's version 0.10.0, compiled from the main branch

NVIM v0.10.0-dev-132+ge81331c2b
Build type: RelWithDebInfo
LuaJIT 2.1.0-beta3
...

Same problem here for neovim 0.9.0 (latest stable), I managed to work around by defaulting the value of --nvim option to nvim-old, which symbol-links to downloaded nvim 0.8.3 appimage.

[vhakulinen]

The issue is with gnvim not respecting this part of the api contract that neovim sets:

Future versions of Nvim may add new update kinds and may append new parameters
to existing update kinds. Clients must be prepared to ignore such extensions,
for forward-compatibility.

The easy fix is to regenerate the API types and break gnvim for previous versions of neovim, but the more involved fix is to implement custom serde deserializer that knows how to ignore extra fields.

I'm leaning towards only supporting nvim 0.9+ since it contains updated API for making smooth scrolling better (hopefully).

[illwieckz]

Hmm, I got a similar error, but I'm using the stock neovim from Ubuntu 22.10 repository that ships neovim 0.7.2.

Maybe it would be good to have a message saying the version is not compatible, instead of a kind-of-crash.

[vhakulinen]

I was thinking of adding a version check, but didn't get around to it yet.

The updated nvim version requirement is documented on the readme.