I just updated rtorrent to the testing version, and got the same error. It also broke aptitude so I had to fix it manually.
Fixed by manually downloading testing version of libc6 from here http://packages.debian.org/wheezy/libc6 and installed it # dpkg -i --auto-deconfigure libc6_2.13-16_amd64.deb -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
