Comment 9 for bug 1530518

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