[gentoo-user] How to repair a 'secondary Gentoo system'

[Helmut Jarausch]

Hi,

I have built a 'secondary' GenToo system on a separate partition. (This  
system contains far less packages and uses only CFLAGS for the older  
hardware of my wife's laptop).
Until now I've always chrooted into that folder; there I've updated  
Gentoo regularly.

But now, don't ask me why,
chroot  /OtherGentoo   /bin/bash
dies of a segment fault.

Is there any means to repair such a Gentoo system short of rebuilding  
it (nearly) from scratch?

Can one use Gentoo's prefix feature?

Many thanks for a hint,
Helmut