Not a single user can log in on my system

[leyvi]

Not technically a kernel issue, but definately a system one:
Checked permissions for login shells, all good.
Nothing in syslog. Started in the middle of my last update: after I locked the screen (I use KDE) I couldn't unlock, and trying to log in from a VT would tell me that the user did not exist (for every single one).
If you're wondering how I got the logs, I used the livecd.
Get this weird thing printed when I open a new tmux pane after chrooting into my system:

[leyvi]

UPDATE:
In rc.log was a whole bunch of errors about different systemd modules missing symbol definitions. Not good.
I use OpenRC, but there are a few services that depend on systemd.
I noticed during my last update that the strip command kept failing at the end of each emerge, something to do with object files not being formatted correctly. Maybe there's a connection? Tried oneshotting all the relevant systemd-related packages, failed due to an undefined symbol named crypt_r.

[Banana]

without any error or log files it is hardly possible to provide you any good solution.

So here is just a wild guess:
Maybe something failed during the last update? Power outage? Disk failure?
It sounds like something is really off.

I think the best way, if possible, to boot from a USB stick and chroot into it.
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