apt-get crashed with SIGSEGV in pkgCache::ReMap()

[Stephen G]

This error occurred in the croned apt-get update check

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: apt 0.8.16~exp12ubuntu8
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu3
Architecture: amd64
Date: Mon Apr 16 07:35:36 2012
ExecutablePath: /usr/bin/apt-get
InstallationMedia: This
ProcCmdline: apt-get check -f -qq
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 SHELL=/bin/sh
SegvAnalysis:
 Segfault happened at: 0x7f6c30329ae4 <_ZN8pkgCache5ReMapERKb+116>: cmp %rcx,(%rdi)
 PC (0x7f6c30329ae4) ok
 source "%rcx" ok
 destination "(%rdi)" (0xffffffffffffffff) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: apt
StacktraceTop:
 pkgCache::ReMap(bool const&) () from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
 pkgCache::pkgCache(MMap*, bool) () from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
 ?? () from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
 pkgCacheGenerator::MakeStatusCache(pkgSourceList&, OpProgress*, MMap**, bool) () from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
 pkgCacheFile::BuildCaches(OpProgress*, bool) () from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
Title: apt-get crashed with SIGSEGV in pkgCache::ReMap()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 pkgCache::ReMap(bool const&) () from /tmp/tmpaR041k/usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
 pkgCache::pkgCache(MMap*, bool) () from /tmp/tmpaR041k/usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
 ?? () from /tmp/tmpaR041k/usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
 pkgCacheGenerator::MakeStatusCache(pkgSourceList&, OpProgress*, MMap**, bool) () from /tmp/tmpaR041k/usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
 pkgCacheFile::BuildCaches(OpProgress*, bool) () from /tmp/tmpaR041k/usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Christopher Forster (christopherforster)]

sudo apt-get update
apt-get: error while loading shared libraries: /usr/lib/i386-linux-gnu/libapt-pkg.so.4.12: file too short

sudo update-manager
Traceback (most recent call last):
  File "/usr/bin/update-manager", line 33, in <module>
    from UpdateManager.UpdateManager import UpdateManager
  File "/usr/lib/python2.7/dist-packages/UpdateManager/UpdateManager.py", line 39, in <module>
    import apt_pkg
ImportError: /usr/lib/i386-linux-gnu/libapt-pkg.so.4.12: fil för kort
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/apport_python_hook.py", line 64, in apport_excepthook
    from apport.fileutils import likely_packaged, get_recent_crashes
  File "/usr/lib/python2.7/dist-packages/apport/__init__.py", line 1, in <module>
    from apport.report import Report
  File "/usr/lib/python2.7/dist-packages/apport/report.py", line 20, in <module>
    import apport.fileutils
  File "/usr/lib/python2.7/dist-packages/apport/fileutils.py", line 22, in <module>
    from apport.packaging_impl import impl as packaging
  File "/usr/lib/python2.7/dist-packages/apport/packaging_impl.py", line 20, in <module>
    import apt
  File "/usr/lib/python2.7/dist-packages/apt/__init__.py", line 21, in <module>
    import apt_pkg
ImportError: /usr/lib/i386-linux-gnu/libapt-pkg.so.4.12: fil för kort

Original exception was:
Traceback (most recent call last):
  File "/usr/bin/update-manager", line 33, in <module>
    from UpdateManager.UpdateManager import UpdateManager
  File "/usr/lib/python2.7/dist-packages/UpdateManager/UpdateManager.py", line 39, in <module>
    import apt_pkg
ImportError: /usr/lib/i386-linux-gnu/libapt-pkg.so.4.12: fil för kort

[Julian Andres Klode (juliank)]

Thanks for your bug report. The generator code has changed a lot in the mean time. I am thus closing the bug, as it may be a bug we likely fixed in the meantime.