Intermittent crashes while scrolling

[gshpychka]

Sometime, usually upon first loading a file and scrolling (while LSP is loading, I think), neovim silently crashes near the end of the scroll. How do I debug this - where should I look for the logs?

I am on MacOS, using neoscroll with the default config.

[richardso21]

I have the same issue, seems to happen most often when I am spamming Ctrl-D/U to scroll through my code. No red error messages or anything, just kicks me back to the terminal and I have to start up nvim again. I've disabled the plugin for now and will report if the crashes continue or stop happening.

EDIT: The performance fix seen here #80 (comment) still does not fix this crashing issue...

[karb94]

Have you always experienced this or did this issue appear after a Neovim or Neoscroll update?

Is there any way to reproduce it? Unfortunately, I have never experienced this myself.

[gshpychka]

Have you always experienced this or did this issue appear after a Neovim or Neoscroll update?

Is there any way to reproduce it? Unfortunately, I have never experienced this myself.

I can't say when it started appearing and unfortunately don't know a reliable way to reproduce this. I was hoping there would be logs somewhere that I could look at

[karb94]

What config are you using? If you see it happening with a particular config, e.g. when using easing functions, it might give us some clues.

[gshpychka]

What config are you using? If you see it happening with a particular config, e.g. when using easing functions, it might give us some clues.

To add a bit of info - I have the same exact behavior as @richardso21, i.e. usually happens when spamming Ctrl-D/U quickly, and especially while LSP is loading (not sure about this one).

Regarding my config, I'm pretty sure it's the default one:

require("neoscroll").setup({
	-- All these keys will be mapped to their corresponding default scrolling animation
	mappings = { "<C-u>", "<C-d>", "<C-b>", "<C-f>", "<C-y>", "<C-e>", "zt", "zz", "zb" },
	hide_cursor = true, -- Hide cursor while scrolling
	stop_eof = true, -- Stop at <EOF> when scrolling downwards
	respect_scrolloff = false, -- Stop scrolling when the cursor reaches the scrolloff margin of the file
	cursor_scrolls_alone = true, -- The cursor will keep on scrolling even if the window cannot scroll further
	easing_function = nil, -- Default easing function
	pre_hook = nil, -- Function to run before the scrolling animation starts
	post_hook = nil, -- Function to run after the scrolling animation ends
	performance_mode = false, -- Disable "Performance Mode" on all buffers.
})

[richardso21]

Yes, spamming those keybinds while the LSP is loading usually spells trouble. This is my config with lazy.nvim (pretty barebones):

{
 	"karb94/neoscroll.nvim",
 	opts = {
 		easing_function = "sine",
	},
}

As for my lsp setup, I am using a combination of lsp-zero, mason, lspconfig, and nvim-cmp.

[edwardbaeg]

I am also having this issue - sometimes crashing with c-d/u. However, I experience it randomly, not just during LSP loading.

My config is simply:

         require("neoscroll").setup({
            easing_function = "sine",
         })

[richardso21]

Update to this thread, I realize that this issue happens even when I am scrolling with my mouse wheel as well, even with this plugin removed. So if others experience this exact same thing as well, I think this is more of a neovim issue than it is neoscroll...

[edwardbaeg]

I can also add that I have seen this issue after replacing neoscroll with mini.animate, and so this issue is likely not just contained to neoscroll.

[karb94]

Can you pull the latest commit? It adds a pcall() to the scrolling function to handle any errors it may throw. This was done to fix another issue but could help here as well.

[richardso21]

Haven't pulled the latest commit yet, but on ~/.local/state/nvim/log I see:

ERR 2024-02-09T10:26:18.125 ?.4867     chan_close_with_error:653: RPC: (null)

That's all, and it occurs every time I crash when scrolling (neoscroll or not). I'm not sure if anyone else is also seeing this as well. I'm also using MacOS Sonoma (14) with Kitty terminal for your information.

[edwardbaeg]

Yes, I am also seeing these messages in my log. And these occurred while using ctrl-{ / }.

ERR 2024-02-09T12:07:23.130 ?.44300    chan_close_with_error:653: RPC: (null)
ERR 2024-02-09T14:25:17.172 ?.87848    chan_close_with_error:653: RPC: (null)

I am going to switch back to neoscroll and see if the latest commit has fixed the issue.

[karb94]

@edwardbaeg I'm not sure how the ctrl-{ movement is tied to neoscroll as it is not animated by default. Did you map it to a scrolling animation?

[edwardbaeg]

@edwardbaeg I'm not sure how the ctrl-{ movement is tied to neoscroll as it is not animated by default. Did you map it to a scrolling animation?

I had recently switched over to try mini.animate to see if I could repro this issue and I was seeing the same problems. Sorry for the confusion, I forgot that neoscroll doesn't handle ctrl { }.

[richardso21]

Since it's also happening with mini.animate, I suppose this is a neovim issue? However, if I run nvim --clean and I begin scrolling quickly I never run into this issue again... Maybe some other common plugin is the culprit

[richardso21]

After a very long time of investigating which plugin would be causing this (so long in fact that I don't want to admit it), I pinpointed the cause to be messages (especially lsp progress messages) displayed by noice.nvim and nvim-notify. I found a way to reproduce this crash somewhat consistently, and that is to scroll very very fast on a large file while lsp is loading.

My fix for this is to set lsp = { progress = false } in noice.nvim's config. However, I will also say that I am using Neovim stable 0.9.5 despite noice.nvim strongly suggesting I use nightly (for some reason I can't get it to install with homebrew).

UPDATE: I can't reproduce this issue anymore using neovim nightly, but I encountered more inconvenient unrelated bugs along the way so I'll be staying on stable with this fix for now 😅

[edwardbaeg]

I don't have noice.nvim or nvim-notify installed and I am still getting booted from nvim while scrolling :/. This includes the latest commit for neoscroll. I'll see if I have any plugins similar to those that might be causing this.

[karb94]

@edwardbaeg could you please try to reproduce this without any plugins other than nvim-lspconfig? Also pull latest commit as it prevents endless loops (see #95) although this mostly applies to files with wrapped lines.

[edwardbaeg]

@karb94 I have not experienced any similar crashes for the last week. This may have resolved itself. Maybe this was due to some bad interaction with another plugin that was updated recently

[gshpychka]

This may have been caused at least in part by neovim/neovim#27859

[karb94]

I'll close this for now as it doesn't appear to be related to Neoscroll.