I've been getting identical emails to the above from my system recently. I have checked /usr/sbin/update-apt-xapian-index and it has the bug fix suggested above.
$ uname -a Linux 4.4.0-66-generic #87-Ubuntu SMP Fri Mar 3 15:29:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux lsb_release -rd Description: Ubuntu 16.04.2 LTS Release: 16.04 $ apt-cache policy apt-xapian-index apt-xapian-index: Installed: 0.47ubuntu8.3 Candidate: 0.47ubuntu8.3 Version table: *** 0.47ubuntu8.3 500 500 http://gb.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages 500 http://gb.archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages 100 /var/lib/dpkg/status 0.47ubuntu8 500 500 http://gb.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages 500 http://gb.archive.ubuntu.com/ubuntu xenial/universe i386 Packages $ sudo /usr/sbin/update-apt-xapian-index The index /var/lib/apt-xapian-index is up to date Exception ignored in: <bound method ServerProgress.__del__ of <axi.indexer.ServerProgress object at 0x7fd7aeb14748>> Traceback (most recent call last): File "/usr/lib/python3/dist-packages/axi/indexer.py", line 306, in __del__ TypeError: 'NoneType' object is not callable -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1530518 Title: /etc/cron.weekly/apt-xapian-index reports TypeError To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt-xapian-index/+bug/1530518/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs