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Certain key sequences change the output glyphs #2550

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opened 2026-01-30 22:58:10 +00:00 by claunia · 2 comments
claunia commented 2026-01-30 22:58:10 +00:00
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Originally created by @ctolkien on GitHub (Jul 4, 2019).

Environment

Microsoft Windows [Version 10.0.18362.207]
Windows Terminal version (if applicable): 0.2.1831.0

Steps to reproduce

  • Use MesloLGL Nerd Font ForPowerline font.
  • Type fi

Expected behavior

  • Terminal displays fi

Actual behavior

Originally created by @ctolkien on GitHub (Jul 4, 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 Microsoft Windows [Version 10.0.18362.207] Windows Terminal version (if applicable): 0.2.1831.0 ``` # Steps to reproduce - Use MesloLGL Nerd Font ForPowerline font. - Type `fi` <!-- A description of how to trigger this bug. --> # Expected behavior - Terminal displays `fi` <!-- A description of what you're expecting, possibly containing screenshots or reference material. --> # Actual behavior - Terminal rewrites `fi` to a phone icon. - Video example: https://i.imgur.com/fUwPUvN.gif <!-- What's actually happening? -->
claunia added the Needs-TriageResolution-ExternalNeeds-Tag-Fix labels 2026-01-30 22:58:10 +00:00
claunia commented 2026-01-30 22:58:11 +00:00
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@DHowett-MSFT commented on GitHub (Jul 4, 2019):

So, this is a strange case. Yeah, it shouldn't be doing that. But everything I can find tells me that Meslo is authored or patched incorrectly.

Check this out.

There is a glyph dedicated to the fi ligature. Here's what it looks like in Meslo LGL NF:

image

Now, that shouldn't matter. The glyph doesn't have to be used.

Except, it is. It's the ligature for f i...

image

Now, because that information is encoded in the font? Terminal is doing the right thing and ligating f i together into image.

@DHowett-MSFT commented on GitHub (Jul 4, 2019): So, this is a strange case. Yeah, it shouldn't be doing that. But everything I can find tells me that Meslo is authored or patched incorrectly. Check this out. There is a glyph dedicated to the `fi` ligature. Here's what it looks like in Meslo LGL NF: ![image](https://user-images.githubusercontent.com/14316954/60634472-d472fd00-9dc3-11e9-971c-fbcc0d9eb7a2.png) Now, that shouldn't matter. The glyph doesn't have to be used. Except, it is. It's the ligature for `f` `i`... ![image](https://user-images.githubusercontent.com/14316954/60634493-e8b6fa00-9dc3-11e9-9474-f763b19665ef.png) Now, because that information is encoded in the font? Terminal is doing the right thing and ligating `f` `i` together into ![image](https://user-images.githubusercontent.com/14316954/60634507-f53b5280-9dc3-11e9-8140-a53936b9947d.png).
claunia commented 2026-01-30 22:58:11 +00:00
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@ctolkien commented on GitHub (Jul 7, 2019):

Confirming, you're bang on. When looking at the font in settings:

image

@ctolkien commented on GitHub (Jul 7, 2019): Confirming, you're bang on. When looking at the font in settings: ![image](https://user-images.githubusercontent.com/515955/60774535-8578ef00-a158-11e9-8f74-79e4e9f0942b.png)
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Reference: starred/terminal#2550
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