Neovim inserts null character ^@ at first line in p5js editor

[christofferaakre]

• OS Version: Ubuntu 20.04
• Browser Version: Google Chrome Version 101.0.4951.64 (Official Build) (64-bit)
• Browser Addon Version: 0.2.12
• Neovim Plugin Version: Sorry, not sure how to find this

What I tried to do

Tried to use firenvim on https://editor.p5js.org/

What happened

Neovim does not engage automatically as the p5js editor does not use a textarea. This is expected. Using firenvim still works, however it for some reason puts a null character at the start of the editor, i.e. at line 1, column 1. If I copy the character and paste it into my terminal, it shows as ^@, which is indeed a null character. This causes a syntax error in the JavaScript code I am typing in the editor, and I end up having to remove it manually everytime I :wq.

To be clear, this does not seem to happen elsewhere, I've only had this happen on p5js so far.

[glacambre]

Thanks for the report. It's slightly surprising as p5js is using CodeMirror, which Firenvim already supports. I'll dig deeper when I have time.

[dclong]

I'm having the same issue when editing files using FireNVim on GitHub.

[glacambre]

@dclong what browser, os and neovim version are you using?

[dclong]

OS: Ubuntu 20.04 Browser: Chrome 102.0.5005.61 NeoVim: 0.4.3

[glacambre]

@dclong please update your neovim, your are several stable versions behind.

[dclong]

@glacambre,

I'm seeing the same issue in another environment too. OS: macOS Monterey (12.4) Browser: Chrome 102.0.5005.61 NeoVim: 0.7.0

[dclong]

The same issue is observed on

• Ubuntu 22.04 / !Pop OS 22.04
• Chrome 106.0.5249.119 (Official Build) (64-bit)
• NeoVim 0.7.2