[Bug 1871145] Re: apt.Cache._depcache.init() raises Error

[Balint Reczey]

** Summary changed:

- /usr/bin/unattended-upgrade:apt_pkg.Error:try_to_upgrade:mark_upgrade_adjusted:call_adjusted:clear:/usr/bin/unattended-upgrade at 2512:main:run:calculate_upgradable_pkgs:try_to_upgrade:rewind_cache:clear
+ apt.Cache._depcache.init() raises Error

** Summary changed:

- apt.Cache._depcache.init() raises Error
+ apt.Cache.clear() -> apt.Cache._depcache.init() raises Error

** Description changed:

+ Unattended-upgrades 2.1 triggers the following crash in python-apt:
+ 
+   File "/usr/bin/unattended-upgrade", line 1706, in try_to_upgrade
+     cache.mark_upgrade_adjusted(pkg, from_user=not pkg.is_auto_installed)
+   File "/usr/bin/unattended-upgrade", line 438, in mark_upgrade_adjusted
+     self.call_adjusted(apt.package.Package.mark_upgrade, pkg, **kwargs)
+   File "/usr/bin/unattended-upgrade", line 397, in call_adjusted
+     self.clear()
+   File "/usr/lib/python3/dist-packages/apt/cache.py", line 700, in clear
+     self._depcache.init()
+ apt_pkg.Error: E:The package intellij-idea-ultimate needs to be reinstalled, but I can't find an archive for it.
+ 
+ I think .clear() should not raise an error, but if it should u-u can
+ catch that.
+ 
+ ---
+ 
  The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with package version 2.1, the problem page at https://errors.ubuntu.com/problem/798f1ab5a4a2784a0fadd6034a875901345682f9 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/.

** Also affects: python-apt (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: unattended-upgrades (Ubuntu)
       Status: New => Opinion

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https://bugs.launchpad.net/bugs/1871145

Title:
  apt.Cache.clear() -> apt.Cache._depcache.init() raises Error

Status in python-apt package in Ubuntu:
  New
Status in unattended-upgrades package in Ubuntu:
  Opinion

Bug description:
  Unattended-upgrades 2.1 triggers the following crash in python-apt:

    File "/usr/bin/unattended-upgrade", line 1706, in try_to_upgrade
      cache.mark_upgrade_adjusted(pkg, from_user=not pkg.is_auto_installed)
    File "/usr/bin/unattended-upgrade", line 438, in mark_upgrade_adjusted
      self.call_adjusted(apt.package.Package.mark_upgrade, pkg, **kwargs)
    File "/usr/bin/unattended-upgrade", line 397, in call_adjusted
      self.clear()
    File "/usr/lib/python3/dist-packages/apt/cache.py", line 700, in clear
      self._depcache.init()
  apt_pkg.Error: E:The package intellij-idea-ultimate needs to be reinstalled, but I can't find an archive for it.

  I think .clear() should not raise an error, but if it should u-u can
  catch that.

  ---

  The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with package version 2.1, the problem page at https://errors.ubuntu.com/problem/798f1ab5a4a2784a0fadd6034a875901345682f9 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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