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

[errors.ubuntu.com bug bridge]

Public bug reported:

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/.

** Affects: unattended-upgrades (Ubuntu)
     Importance: High
     Assignee: Alessandro Astone (aleasto)
         Status: In Progress


** Tags: resolute

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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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