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Iosevka Nerd Font crashes the app #2953

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opened 2026-01-30 23:09:40 +00:00 by claunia · 2 comments
claunia commented 2026-01-30 23:09:40 +00:00
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Originally created by @vasiby on GitHub (Jul 26, 2019).

Environment

Windows build number: Microsoft Windows [Version 10.0.18362.239]
Windows Terminal version (if applicable): Windows Terminal (Preview) Version: 0.2.1831.0

Any other software?

Steps to reproduce

  1. Download the font
    https://github.com/ryanoasis/nerd-fonts/blob/master/patched-fonts/Iosevka/Regular/complete/Iosevka%20Nerd%20Font%20Complete%20Windows%20Compatible.ttf
  2. Install into Windows
  3. Edit profiles.json "fontFace" : "Iosevka NF"

Expected behavior

Able to render the font without crashing.
This font doesn't crash other software, tested Fluent Terminal, Hyper, ConEmu, cmder, VS code, IntelliJ IDEA

Actual behavior

App immediately exits without any error messages when tab with this font is opened. If it's the default profile, the app doesn't even start.
Same with other Iosevka nerd fonts (Iosevka Term, Iosevka Mono)

Originally created by @vasiby on GitHub (Jul 26, 2019). <!-- 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨 I ACKNOWLEDGE THE FOLLOWING BEFORE PROCEEDING: 1. If I delete this entire template and go my own path, the core team may close my issue without further explanation or engagement. 2. If I list multiple bugs/concerns in this one issue, the core team may close my issue without further explanation or engagement. 3. If I write an issue that has many duplicates, the core team may close my issue without further explanation or engagement (and without necessarily spending time to find the exact duplicate ID number). 4. If I leave the title incomplete when filing the issue, the core team may close my issue without further explanation or engagement. 5. If I file something completely blank in the body, the core team may close my issue without further explanation or engagement. All good? Then proceed! --> <!-- This bug tracker is monitored by Windows Terminal development team and other technical folks. **Important: When reporting BSODs or security issues, DO NOT attach memory dumps, logs, or traces to Github issues**. Instead, send dumps/traces to secure@microsoft.com, referencing this GitHub issue. Please use this form and describe your issue, concisely but precisely, with as much detail as possible. --> # Environment ```none Windows build number: Microsoft Windows [Version 10.0.18362.239] Windows Terminal version (if applicable): Windows Terminal (Preview) Version: 0.2.1831.0 Any other software? ``` # Steps to reproduce <!-- A description of how to trigger this bug. --> 1. Download the font https://github.com/ryanoasis/nerd-fonts/blob/master/patched-fonts/Iosevka/Regular/complete/Iosevka%20Nerd%20Font%20Complete%20Windows%20Compatible.ttf 2. Install into Windows 3. Edit profiles.json `"fontFace" : "Iosevka NF"` # Expected behavior <!-- A description of what you're expecting, possibly containing screenshots or reference material. --> Able to render the font without crashing. This font doesn't crash other software, tested Fluent Terminal, Hyper, ConEmu, cmder, VS code, IntelliJ IDEA # Actual behavior <!-- What's actually happening? --> App immediately exits without any error messages when tab with this font is opened. If it's the default profile, the app doesn't even start. Same with other Iosevka nerd fonts (Iosevka Term, Iosevka Mono)
claunia added the Resolution-Duplicate label 2026-01-30 23:09:40 +00:00
claunia commented 2026-01-30 23:09:40 +00:00
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@Kri-Ol commented on GitHub (Jul 28, 2019):

Had the similar but a bit different issue with Fira Code. Fira Code comes with five faces - Light, Regular, Medium, Bold, Retina. If I put font face in JSON config as "Fira Code" it works (Regular face, I guess, is being picked up). If If I put font face in JSON config as "Fira Code Regular" it starts with garbled output in existing terminal and crash on new terminal start. Same problem (garbage, crash) for "Fira Code Light", "Fira Code Medium" and "Fira Code Bold". "Fira Code Retina" surprisingly, works fine as well as just "Fira Code". F.e., in VS Code all faces worked.

@Kri-Ol commented on GitHub (Jul 28, 2019): Had the similar but a bit different issue with Fira Code. Fira Code comes with five faces - Light, Regular, Medium, Bold, Retina. If I put font face in JSON config as "Fira Code" it works (Regular face, I guess, is being picked up). If If I put font face in JSON config as "Fira Code Regular" it starts with garbled output in existing terminal and crash on new terminal start. Same problem (garbage, crash) for "Fira Code Light", "Fira Code Medium" and "Fira Code Bold". "Fira Code Retina" surprisingly, works fine as well as just "Fira Code". F.e., in VS Code all faces worked.
claunia commented 2026-01-30 23:09:40 +00:00
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@DHowett-MSFT commented on GitHub (Jul 29, 2019):

Yeah, this is a family/face issue #1163 combined with #550

@DHowett-MSFT commented on GitHub (Jul 29, 2019): Yeah, this is a family/face issue #1163 combined with #550
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Reference: starred/terminal#2953
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