Comment 16 for bug 1852985

`sudo apt install unifont` and restarting the computer does **not** solve the problem for me, and it can still be reproduced via:

```
git init testrepo
cd testrepo
git commit --allow-empty -m 💎
gitk
```

This might be because I also have manually installed `~/.fonts/NotoColorEmoji.ttf` in order to show color emoji. And the color emoji does show correctly in terminal (see attachment), but it will still crash gitk.