potato with apt-get upgrade killed libstdc++

[Junichi Uekawa <dancer@netfort.gr.jp>]

After running apt-get upgrade on a machine that was installed with 
potato bootfloppy image 2.2.8, I encountered the following errors:

kecs11:~$ apt-get
apt-get: error in loading shared libraries: /usr/lib/libstdc++-libc6.1-2.so.3: undefined symbol: __ti9exception
kecs11:~$ dselect 
dselect: error in loading shared libraries: /usr/lib/libstdc++-libc6.1-2.so.3: undefined symbol: __vt_9bad_alloc



How can I solve this?

--
dancer, a.k.a. Junichi Uekawa   http://www.netfort.gr.jp/~dancer
 Dept. of Knowledge Engineering and Computer Science, Doshisha University.
... Long Live Free Software, LIBERTAS OMNI VINCIT.