*** This bug is a duplicate of bug 1685984 ***
    https://bugs.launchpad.net/bugs/1685984

Paulo, please note:

a) Repairing a system using the steps in comment #9 doesn't address the
underlying problem, and so it could potentially break again.

b) Sophos doesn't support newer kernels and Ubuntu 19.10 is explicitly
not supported at present. While it mostly works, their released Talpa
on-access scanning component does not successfully compile for Ubuntu
19.10, and so Sophos falls back to using fanotify for that functionality
(if support for it is available in the kernel). So, it turns out that
the root cause of this particular problem is either a bug in fanotify
itself, or a bug in the way Sophos is using it. (I couldn't say which.)
A patch for Sophos' Talpa component that will supposedly get it
compiling and working on 19.10 is apparently available, but I haven't
tried it myself: https://github.com/sophos/talpa/issues/17 More details
can be found here: https://community.sophos.com/products/server-
protection-integration/f/sophos-anti-virus-for-linux-basic/117256/sav-
protect-service-breaks-system-updates-on-ubuntu

** Bug watch added: github.com/sophos/talpa/issues #17
   https://github.com/sophos/talpa/issues/17

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https://bugs.launchpad.net/bugs/1855259

Title:
  apt broken by unattended upgrade in Ubuntu 19.10

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