Tested both patches:

    env -i LANG=C =zsh-5.9.0.1-dev -fc 'cd; echo "$USERNAME | ${(%):-%n} |
$LOGNAME"'

Now results in:

    Студент | Студент | Ѓ�ту�дент

*USERNAME* and *%n* works, but *LOGNAME* is broken now (both in C and
C.UTF-8 locales)


Btw, *zcompile* now works just fine

вс, 1 окт. 2023 г., 21:05 Bart Schaefer <schaefer@brasslantern.com>:

> On Sat, Sep 30, 2023 at 10:05 PM Максим Щербаков
> <herobrine135111@gmail.com> wrote:
> >
> > As we can see, $LOGNAME is fine, but $USERNAME and %n are bad.
>
> Patch appended.
>
> As mentioned in another thread, this presumes that it's harmless to
> metafy something that's already metafied.  If that's not true then the
> patch will fix USERNAME but break LOGNAME.
>
> Aside:  If USE_GETPWUID is not defined and DISABLE_DYNAMIC_NSS is also
> defined, then both USERNAME and LOGNAME will be empty.
>
> > zcompile: can't write zwc file: /home/Студент/.zc/.zcompdump-5.9.zwc
>
> The opposite problem.
>
>