[Bug 800865] Re: gdebi crashes with : KeyError: "The cache has no package named 'opera-next'" when package is not in the archive

[Ubuntu QA's Bug Bot]

** Tags added: testcase

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Title:
  gdebi crashes with :  KeyError: "The cache has no package named
  'opera-next'" when package is not in the archive

Status in “gdebi” package in Ubuntu:
  Fix Released

Bug description:
  I downloaded a .deb package from internet. After trying to open it
  with GDebi to install it, GDebi window opens and loads it. When the
  progress bar completely fills, GDebi window closes unexpectly.

  TEST CASE:
  1. Download opera-next 
   $ wget http://deb.opera.com/opera-beta/pool/non-free/o/opera-next/opera-next_11.50.1052_i386.deb
  2. Run gdebi
   $ gdebi-gtk opera-next/opera-next_11.50.1052_i386.deb

  Results:
   Traceback (most recent call last):
     File "/usr/bin/gdebi-gtk", line 73, in <module>
       app = GDebi(datadir=data,options=options,file=afile)
     File "/usr/share/gdebi/GDebi/GDebi.py", line 148, in __init__
       self.open(file)
     File "/usr/share/gdebi/GDebi/GDebi.py", line 327, in open
       provides = self.compareProvides()
     File "/usr/share/gdebi/GDebi/GDebiCommon.py", line 129, in compareProvides
       pkg = self._cache[self._deb.pkgname].installed
     File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 177, in __getitem__
       raise KeyError('The cache has no package named %r' % key)
   KeyError: "The cache has no package named 'opera-next'"

  It is also reproducible with other known good .deb files that are not
  part of the archive, for example crossover pro.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: gdebi 0.8~exp2
  ProcVersionSignature: Ubuntu 3.0-1.2-generic 3.0.0-rc3
  Uname: Linux 3.0-1-generic i686
  NonfreeKernelModules: wl
  Architecture: i386
  Date: Wed Jun 22 14:24:13 2011
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=es_MX:en
   PATH=(custom, no user)
   LANG=es_MX
   LC_MESSAGES=es_MX.UTF-8
   SHELL=/bin/bash
  SourcePackage: gdebi
  UpgradeStatus: Upgraded to oneiric on 2011-06-17 (5 days ago)

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