Preparing to unpack muon_5.5.0-0ubuntu1~ubuntu16.04~ppa2_amd64.deb ...
Unpacking muon (4:5.5.0-0ubuntu1~ubuntu16.04~ppa2) over (4:5.5.0-0ubuntu1~ubuntu16.04~ppa2) ...
Setting up muon (4:5.5.0-0ubuntu1~ubuntu16.04~ppa2) ...
The index /var/lib/apt-xapian-index is up to date
Exception ignored in: <bound method ServerProgress.__del__ of <axi.indexer.ServerProgress object at 0x7f0b4ac9da58>>
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/axi/indexer.py", line 306, in __del__
TypeError: 'NoneType' object is not callable
Processing triggers for bamfdaemon (0.5.3~bzr0+16.04.20160321-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for desktop-file-utils (0.22-1ubuntu4) ...
Processing triggers for gnome-menus (3.13.3-6ubuntu3) ...
Processing triggers for mime-support (3.59ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.15-0ubuntu1) ...