Bug: Ligature Glyphs render incorrectly in terminal

[3dyuval]

Hi, I'm using Kitty terminal and this is how it currently renders. I was able to create a succefull compilation with nerd patching, unhinted, and ligature glayphs in this pr for reference

Reproduction steps

1. Download 2.0.0 Term Nerd Font

curl -L "https://github.com/ahatem/IoskeleyMono/releases/download/v2.0.0/IoskeleyMono-Term-NerdFont.zip" -o ioskeleymono-term.zip

unzip -o ioskeleymono-term.zip
find . -name "*.ttf" -exec cp {} "$FONT_DIR/" \;
fc-cache -f
echo "Updated font cache."

2. installed and updated font cache
3. open kitten choose-fonts and select IoskeleyMonoTerm Nerd Font
4. Notice the glyphs render incorrectly

References and context

# BEGIN_KITTY_FONTS
font_family      family='IoskeleyMonoTerm Nerd Font' postscript_name=IoskeleyMonoTermNF
bold_font        family='IoskeleyMonoTerm Nerd Font' postscript_name=IoskeleyMonoTermNF-Bold
italic_font      family='IoskeleyMonoTerm Nerd Font' postscript_name=IoskeleyMonoTermNF-Italic
bold_italic_font family='IoskeleyMonoTerm Nerd Font' postscript_name=IoskeleyMonoTermNF-BoldItalic
# END_KITTY_FONTS

System information

┌─────────────────────────────────────────────────────────────────────────────────────────┐
│  SYSTEMINFORMATION                                                      Version: 5.31.5 │
└─────────────────────────────────────────────────────────────────────────────────────────┘

Operating System:
──────────────────────────────────────────────────────────────────────────────────────────
Platform         : linux
Distro           : cachyos
Release          : rolling
Codename         : 
Kernel           : 6.19.9-1-cachyos
Arch             : x64
Hostname         : dell-lat-x8664
Codepage         : UTF-8
Build            : rolling

System:
──────────────────────────────────────────────────────────────────────────────────────────
Manufacturer     : Dell Inc.
Model            : Latitude 5520
Version          : 
Virtual          : false

CPU:
──────────────────────────────────────────────────────────────────────────────────────────
Manufacturer     : Intel
Brand            : Gen Intel® Core™ i7-1165G7
Family           : 6
Model            : 140
Stepping         : 1
Speed            : 2.8
Cores            : 8
PhysicalCores    : 4
PerformanceCores : 4
EfficiencyCores  : 0
Processors       : 1
Socket           : 

[KhoaLee]

Hi @3dyuval , my kitty terminal did not recognize the IoskeleyMonoTerm Nerd Font. For the Ioskeley Mono, it did not detect. How does your kitty terminal can detect the font? I did run fc-cache -f

[3dyuval]

@KhoaLee I'm sorry I don't know the exact details but please issue another bug because its clearly not working as expected. In the meantime you can try using latest vesions to see if one of these work in Releases · 3dyuval/IoskeleyMono