[Bug 843316] Re: aptd crashed with SIGSEGV in pkgDepCache::CheckDep()

[Julian Andres Klode]

Very very likely to be a bad cache file. Cache files are now checked for
correct length, so this must be an invalid value written somewhere. This
in turn might indicate a hardware error in RAM or harddisk. (The reason
being that we get that in CheckDep()/VerStr() while opening a cache
file, so there's no connection to Python whatsoever)

** Package changed: python-apt (Ubuntu) => apt (Ubuntu)

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https://bugs.launchpad.net/bugs/843316

Title:
  aptd crashed with SIGSEGV in pkgDepCache::CheckDep()

Status in “apt” package in Ubuntu:
  Confirmed

Bug description:
  dont know why this is happening, just happens on boot up

  ProblemType: Crash
  DistroRelease: Ubuntu 11.10
  Package: aptdaemon 0.43+bzr691
  ProcVersionSignature: Ubuntu 3.0.0-10.16-generic 3.0.4
  Uname: Linux 3.0.0-10-generic i686
  Architecture: i386
  Date: Tue Sep  6 19:00:13 2011
  DesktopFile: /usr/share/aptdaemon/aptdaemon.desktop
  ExecutablePath: /usr/sbin/aptd
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha i386 (20110803.1)
  InterpreterPath: /usr/bin/python2.7
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python /usr/sbin/aptd
  ProcEnviron:
   
  SegvAnalysis:
   Segfault happened at: 0x8995e7 <_ZN11pkgDepCache8CheckDepEN8pkgCache11DepIteratorEiRNS0_11PkgIteratorE+327>:	mov    (%edx),%edx
   PC (0x008995e7) ok
   source "(%edx)" (0x426fcc80) not located in a known VMA region (needed readable region)!
   destination "%edx" ok
  SegvReason: reading unknown VMA
  Signal: 11
  SourcePackage: aptdaemon
  StacktraceTop:
   pkgDepCache::CheckDep(pkgCache::DepIterator, int, pkgCache::PkgIterator&) () from /usr/lib/libapt-pkg.so.4.11
   pkgDepCache::DependencyState(pkgCache::DepIterator&) () from /usr/lib/libapt-pkg.so.4.11
   pkgDepCache::Update(OpProgress*) () from /usr/lib/libapt-pkg.so.4.11
   pkgDepCache::Init(OpProgress*) () from /usr/lib/libapt-pkg.so.4.11
   pkgCacheFile::BuildDepCache(OpProgress*) () from /usr/lib/libapt-pkg.so.4.11
  Title: aptd crashed with SIGSEGV in pkgDepCache::CheckDep()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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