Extremely slow execution and timeout errors

[sangaline]

Every time that I save a file I get this message:

[coc.nvim] eslint will save operation timeout after 0.5s

If I save and quit, then I see this printed out in the terminal:

Error detected while processing function <lambda>27[1]..<SNR>187_onExit:
line    3:
E684: list index out of range: -1
E15: Invalid expression: a:out[len(a:out) - 1]

This is reproducible in even trivial files in empty projects, so I don't think the timeout is due to the complexity of the file being analyzed. Running :CocCommand eslint.executeAutofix manually works, but it can take 10-30 seconds on files with less than ten lines of code and no imports. Eslint works fine from the command-line without the same lag.

I'm using version 1.1.2 of the plugin and eslint v5.16.0 on Linux. My coc-eslint config is completely vanilla, I haven't done anything except install the plugin. Please let me know if there's additional information that I can provide which would be helpful.

[chemzqm]

Coc.nvim doesn't have code like a:out[len(a:out) - 1] .
I think it's issue with your other vim plugin.

[chemzqm]

Use output channel to see what happened https://github.com/neoclide/coc.nvim/wiki/Debug-language-server#using-output-channel

[sangaline]

Thanks for the quick reply. It seems like the second error was actually from a prettier plugin, but I still have the coc-eslint timeouts even when I disable that plugin. The output channel shows this after saving:

  1 [Info  - 17:21:14] ESLint server running in node v8.11.2
  2 [Info  - 17:21:14] ESLint library loaded from: /tmp/simple-project/node_modules/eslint/lib/api.js
  3 [Error  - 17:21:38] Failed to apply command: eslint.applyAutoFix

When I save and quit, I see this now:

[coc.nvim] eslint will save operation timeout after 0.5s

[chemzqm]

You can try eslint --fix in your terminal, if it takes more than 0.5s, then it's expected, you have to disable autoFixOnSave in your configuration file.
Maybe caused by some wired configuration.

[sangaline]

Eslint takes longer than 0.5s when I run it from the command-line, but the autoformatting takes significantly less time than it does with the plugin. Isn't the default value of autoFixOnSave false? Even when I explicitly set it to false, I still get the timeout error when I save and quit. Is this option possibly not being respected?

[chemzqm]

Could be your other plugin fornating your code.

[sangaline]

Are you saying that another plugin might be calling eslint.executeAutofix? I get the error with

{
  "eslint.autoFix": false,
  "eslint.autoFixOnSave": false,
  "eslint.enable": true,
}

but it goes away when I disable the plugin entirely:

{
  "eslint.autoFix": false,
  "eslint.autoFixOnSave": false,
  "eslint.enable": false,
}

[chemzqm]

It's possible get called in your vim code, or it's overwritten in your vim configuration.
"eslint.autoFixOnSave": false works as expected for me.

[alextrastero]

@sangaline did you manage to solve this? Attached screenshot of my case

Happens when I save the file

[wddwycc]

I have this issue when used together with coc-prettier

[tony]

Removing coc-prettier fixed the lag to me.

[nomasprime]

Does anyone know how to change the timeout? Seems to be general issue that 0.5s is too short.