[Bug 938116] Re: update-manager crashed with SIGSEGV in DescriptionList()

[Michael Vogt]

Thanks for your investigation Colin! It looks like the order of clear(),
cache.open() was wrong and the clear might have caused calls to the old
no longer valid cache. This should be fixed in trunk now, the order got
updated and the store removed from the view before the clear().

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Title:
  update-manager crashed with SIGSEGV in DescriptionList()

Status in “apt” package in Ubuntu:
  Confirmed
Status in “apt” source package in Precise:
  Confirmed

Bug description:
  I was switching the mirror (software sources) in the Settings -> Ubuntu Software -> Download From
  I'm running 12.04

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.5
  ProcVersionSignature: Ubuntu 3.2.0-17.26-generic-pae 3.2.6
  Uname: Linux 3.2.0-17-generic-pae i686
  ApportVersion: 1.92-0ubuntu1
  Architecture: i386
  CrashCounter: 1
  Date: Tue Feb 21 21:01:55 2012
  ExecutablePath: /usr/bin/update-manager
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1329854490
   com.ubuntu.update-manager window-height 500
   com.ubuntu.update-manager window-width 600
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
  InterpreterPath: /usr/bin/python2.7
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python /usr/bin/update-manager
  SegvAnalysis:
   Segfault happened at: 0xb5c026b3 <_ZNK8pkgCache11VerIterator21TranslatedDescriptionEv+115>:	mov    0x14(%edx),%edx
   PC (0xb5c026b3) ok
   source "0x14(%edx)" (0x00ff3f53) not located in a known VMA region (needed readable region)!
   destination "%edx" ok
  SegvReason: reading unknown VMA
  Signal: 11
  SourcePackage: update-manager
  StacktraceTop:
   pkgCache::VerIterator::TranslatedDescription() const () from /usr/lib/i386-linux-gnu/libapt-pkg.so.4.12
   ?? () from /usr/lib/python2.7/dist-packages/apt_pkg.so
   ?? ()
   ?? ()
   _PyAptObject_getattro(_object*, _object*) () from /usr/lib/python2.7/dist-packages/apt_pkg.so
  Title: update-manager crashed with SIGSEGV in pkgCache::VerIterator::TranslatedDescription()
  UpgradeStatus: Upgraded to precise on 2012-02-17 (4 days ago)
  UserGroups: adm admin cdrom dialout lp lpadmin plugdev sambashare

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