Error executing `vim.schedule` via lua callback

[mdgeorge4153]

I have just installed nvim, lean, and lean.nvim for the first time and am trying to get them set up. While navigating lean source, I encounter the following error:

Error executing vim.schedule lua callback: ...re/nvim/plugged/plenary.nvim/lua/plenary/async/async.lua:18: The coroutine failed with this message: ...local/share/nvim/plugged/lean.nvim/lua/lean/infoview.lua:597:
 Error executing lua: ...local/share/nvim/plugged/lean.nvim/lua/lean/infoview.lua:598: attempt to index field 'cmd' (a function value)
stack traceback:
        ...local/share/nvim/plugged/lean.nvim/lua/lean/infoview.lua:598: in function <...local/share/nvim/plugged/lean.nvim/lua/lean/infoview.lua:598>
        [C]: in function 'resume'
        ...re/nvim/plugged/plenary.nvim/lua/plenary/async/async.lua:45: in function 'fn'
        ...e/.local/share/nvim/plugged/lean.nvim/lua/lean/_util.lua:129: in function 'handler'
        /usr/share/nvim/runtime/lua/vim/lsp.lua:1025: in function 'cb'
        vim/_editor.lua:256: in function <vim/_editor.lua:256>
stack traceback:
        [C]: in function 'error'
        ...re/nvim/plugged/plenary.nvim/lua/plenary/async/async.lua:18: in function 'callback_or_next'
        ...re/nvim/plugged/plenary.nvim/lua/plenary/async/async.lua:45: in function 'fn'
        ...e/.local/share/nvim/plugged/lean.nvim/lua/lean/_util.lua:129: in function 'handler'
        /usr/share/nvim/runtime/lua/vim/lsp.lua:1025: in function 'cb'
        vim/_editor.lua:256: in function <vim/_editor.lua:256>
Press ENTER or type command to continue

I am using lean 3, and installed the LSP using npm. I have installed nvim on ubuntu from the PPA,

NVIM v0.7.2
Build type: Release
LuaJIT 2.1.0-beta3
Compiled by team+vim@tracker.debian.org

My init.vim is taken from here: https://github.com/Julian/lean.nvim/wiki/Getting-Started#install-leannvim-and-its-dependencies

To reproduce, open src/data/finset.lean in mathlib and move to line 25 (this is the first file I've opened so I don't know how prevalent the problem is).

[mdgeorge4153]

This appears to pop up every time I move into the RHS of a definition. Note that the info pane does populate.

[Julian]

Hey! I can try to have a look in a bit, so this is just a guess, but are you able to update to neovim 0.8 or newer perhaps and then retry? (Generally neovim itself and most plugins will only support the most recent release, think

[Julian]

Whoops, hit the wrong button, thanks github mobile -- anyways yeah I think this is complaining about us doing vim.cmd.normal which may be 0.8+ I forget -- if you can update (0.8.1 is out as of a month ago too) let me know if that works, otherwise can have a look when I'm back at a computer.

[Julian]

I pushed a commit which changes doing that line in a way that should work on <0.8, which I think might be the only one breaking your setup, but I'd still encourage updating to 0.8 (and 0.9 is going to be out soon) -- in general neovim itself only supports 2 versions (latest stable and latest nightly), so it's hard to support more than that downstream, but obviously I try not to break anything intentionally especially if the Ubuntu repos haven't caught up. Definitely share any feedback though (about this but in general!)