Hyper: Text disappearing when using SF Mono as the font family

[brunocloutier]

• OS version and name: Mac OS Mojave (10.14.6)
• Hyper.app version: 3.1.0-canary.4
• The issue is reproducible in vanilla Hyper.app: No

I have been using SF Mono as my terminal font for years, and last week, whenever I started typing in Hyper, all the text would disappear. The terminal would load with the first line shown (computer name / user name), but after the first letter was typed, every thing would disappear.

After messing around in the config, disabling plugins and options, I have identified the issue being with the use of SF Mono. Reverting it back to Menlo fixed the issue. I have tested with other fonts, and the issue seams to be with SF Mono only.

I am using the Canary version of Hyper (3.1.0), and the issue is not reproductible in vanilla (3.0.4) where SF Mono works fine.

[LabhanshAgrawal]

Tried it out, but couldn't reproduce the issue. Maybe try to reinstall the font and Hyper.

[LabhanshAgrawal]

@brunocloutier did you try to reinstall?

[JessicaSachs]

On OSX Catalina...

Just reproduced this from a fresh install. It's happening 100% of the time for me -- same build -- using the following font family string: fontFamily: '"MesloLGS NF", Menlo, "DejaVu Sans Mono", Consolas, "Lucida Console", monospace'

Workarounds

• Removing the first 3 fonts and using Consolas works.
• Going back to stable also works (but has issues with subpixel anti-aliasing, which is why I'm on canary in the first place 😸)

Debugging
There's an exception being thrown. The fonts are loaded properly during startup, then the exception is thrown and no fonts are rendered.

Trying to access features on undefined...

[LabhanshAgrawal]

@brunocloutier @JessicaSachs
Can you try once with ligatures disabled, set disableLigatures: true in config.
The exception is thrown by the font-ligatures module which is used by xterm-addon-ligatures

[LabhanshAgrawal]

@brunocloutier @JessicaSachs ping

[jbberinger]

@LabhanshAgrawal Ran into the same issue with font disappearing after upgrading to canary. Disabling font ligatures fixed the problem for me.

OS: Ubuntu 19.10 x86_64
Hyper.app version: 3.1.0-canary.4
Shell: zsh 5.7.1
fontFamily 'MesloLGS NF, Menlo, "DejaVu Sans Mono", Consolas, "Lucida Console", monospace',

[LabhanshAgrawal]

@JessicaSachs @jbberinger Can you reply with the link from where you downloaded the font, I want to try and reproduce the issue, so that we might not need to disable ligatures for it.

[jbberinger]

@LabhanshAgrawal I'm using the popular zsh theme Powerlevel10k. It recommends the use of the Meslo Nerd font, which it installs during the setup wizard. I'm guessing that's where @JessicaSachs got the font as well.

https://github.com/romkatv/powerlevel10k#meslo-nerd-font-patched-for-powerlevel10k

[LabhanshAgrawal]

we've disabled ligatures in the default config. I've created an issue to track this in xterm https://github.com/xtermjs/xterm.js/issues/2980
It should be fixed once that's closed.

[drewswaycool]

Just updated to canary today. As a user of Powerlevel10k with zsh, I am still seeing this issue unless ligatures are disabled. Is this still being tracked somewhere?