The commit lacks context, but c7s mentioned on IRC that they got the following error:
```
/usr/share/texmf-dist/tex/latex/base/size10.clointernal error; cannot read font names`
```
Which would be solved by installing `icu-data-full`.
--
via https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/34659#note_237472
Cormac Stephenson <c7s@kasku.net> replied via email:
```
Sorry about that, sent the email by accident.
Anyway, I wanted to try and remove icu-data-full to see if luatex had
the same thing going on, but apk didn't let me, including via xetex,
so I assume this is fine as is and I just ended up with my system in a
weird configuration based on when I did updates or something.
```
--
via https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/34659#note_237480
I don't quite get the gist of the last mal. I have to admit that I personally don't use xetex and I am likely to miss any bugs related to it.
Since thr split of icu was done after the last texlive updates, I would have missed any issued anyway. Maybe I should do a careful round of testing later today.
--
via https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/34659#note_237487
Cormac Stephenson <c7s@kasku.net> replied via email:
```
The gist is that I think it might be unnecessary, and I was only
having problems because I upgraded during a rebuild, or something.
I tried to uninstall icu-data-full to test with luatex, but I
couldn't. Including "not removed due to: [...] xetex", which is what
should happen. This is without this change applied.
At worst it's redundant, but I probably made a mistake and jumped to
conclusions, because I fixed the problem by installing icu-data-full
originally.
```
--
via https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/34659#note_237511