$ apt-cache policy libstdc++6
libstdc++6:
Installed: 4.8-20130102-1
Candidate: 4.8-20130102-1
Version table:
*** 4.8-20130102-1 0
1 http://ftp.debian.org/debian/ experimental/main i386 Packages
100 /var/lib/dpkg/status
4.7.2-4 0
500 http://ftp.no.debian.org/debian/ unstable/main i386 Packages