Comment # 9 on bug 1205109 from Zim Tsui

(In reply to Dr. Werner Fink from comment #8)
> Btw:
> 
> I see for
> 
>   sudo emacs-gtk
>   XDG_RUNTIME_DIR (/run/user/223) is not owned by us (uid 0), but by uid
> 223! (This could e.g. happen if you try to connect to a non-root PulseAudio
> as a root user, over the native protocol. Don't do that.)
> 
> this is an error I guess

`XDG_RUNTIME_DIR` is always resolved to `/run/user/0`, because the script
`/usr/bin/emacs` set `XDG_RUNTIME_DIR` to `/run/user/$UID`, where UID and EUID
both equal 0 within `sudo`. It has nothing to do with the regular user.

Besides, I'm not asking for help, I'm simply reporting a bug, because I seldom
use Emacs.