[Bug 2146446] Re: /usr/bin/unattended-upgrade: TypeError: install_or_postpone.<locals>.run_in_thread.<locals>.<lambda>() missing 1 required positional argument: '_'

[Alessandro Astone]

There seems to have been a change in pygobject which now (correctly) sends 0 parameters to the callback function of GLib.Idle.set_callback. This is detected by build-time tests and would have been detected by autopkgtests except:
* there was no autopkgtest trigger for unattended-upgrades from the pygobject update, weird
* unattended-upgrades autopkgtests seem to be already failing for other reasons.

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https://bugs.launchpad.net/bugs/2146446

Title:
  /usr/bin/unattended-upgrade: TypeError:
  install_or_postpone.<locals>.run_in_thread.<locals>.<lambda>() missing
  1 required positional argument: '_'

Status in unattended-upgrades package in Ubuntu:
  In Progress

Bug description:
  The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with package version 2.12ubuntu7, the problem page at https://errors.ubuntu.com/problem/838e3929676e66058dcc44b56d16f32aa8ce16f5 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
  If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.

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