[Bug 1746102] [NEW] aptitude fails to load package cache when repos aren't found

[pbhj]

Public bug reported:

I had a repo with an error in `apt` such that the update's output would
end:

    Reading package lists... Done                                                                                                               
    N: Ignoring file 'plexmediaserver.list.broken' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension              
    E: The repository 'http://ppa.launchpad.net/transmissionbt/ppa/ubuntu artful Release' does not have a Release file.                         
    N: Updating from such a repository can't be done securely, and is therefore disabled by default.                                            
    N: See apt-secure(8) manpage for repository creation and user configuration details.

When running an update by pressing `u` from within `aptitude` I found
that the program would get to "Loading Cache" and wouldn't complete the
process. The program was not hung, it could be cancelled, but the
updated package list will not display.

Without the error -- by fixing the transmissionbt line within the file
in `/etc/apt/sources.list.d/relevant-file.list` to point to zesty in
this case -- aptitude can now complete the update and create the package
list.

AFAIAA the way apt reports failing repos has changed; presumably this is
related to the error?

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: aptitude 0.8.3-1ubuntu4
ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
CurrentDesktop: KDE
Date: Mon Jan 29 21:33:11 2018
SourcePackage: aptitude
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.logrotate.d.aptitude: [modified]
mtime.conffile..etc.logrotate.d.aptitude: 2016-05-18T00:01:52.280557

** Affects: aptitude (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug artful

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https://bugs.launchpad.net/bugs/1746102

Title:
  aptitude fails to load package cache when repos aren't found

Status in aptitude package in Ubuntu:
  New

Bug description:
  I had a repo with an error in `apt` such that the update's output
  would end:

      Reading package lists... Done                                                                                                               
      N: Ignoring file 'plexmediaserver.list.broken' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension              
      E: The repository 'http://ppa.launchpad.net/transmissionbt/ppa/ubuntu artful Release' does not have a Release file.                         
      N: Updating from such a repository can't be done securely, and is therefore disabled by default.                                            
      N: See apt-secure(8) manpage for repository creation and user configuration details.

  When running an update by pressing `u` from within `aptitude` I found
  that the program would get to "Loading Cache" and wouldn't complete
  the process. The program was not hung, it could be cancelled, but the
  updated package list will not display.

  Without the error -- by fixing the transmissionbt line within the file
  in `/etc/apt/sources.list.d/relevant-file.list` to point to zesty in
  this case -- aptitude can now complete the update and create the
  package list.

  AFAIAA the way apt reports failing repos has changed; presumably this
  is related to the error?

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: aptitude 0.8.3-1ubuntu4
  ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
  Uname: Linux 4.13.0-32-generic x86_64
  ApportVersion: 2.20.7-0ubuntu3.7
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Mon Jan 29 21:33:11 2018
  SourcePackage: aptitude
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.logrotate.d.aptitude: [modified]
  mtime.conffile..etc.logrotate.d.aptitude: 2016-05-18T00:01:52.280557

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