apt-get crashed with SIGSEGV during installation in pkgCacheGenerator::NewVersion ()

[Jean-Baptiste Lallement]

Quantal Desktop 20121015.2

TEST CASE
1. Enable "Free Software Only" in the boot menu
2. Proceed with installation with the defaults

ACTUAL RESULT
Installation stops with
plugininstall.p[7036]: segfault at 7fc5aa977bf0 ip 00007fc5b40cf69d sp 00007fff71f815f0 error 6 in libapt-pkg.so.4.12.0[7fc5b403e000+11b000]

"""
pkgCacheGenerator::NewVersion (this=this@entry=0x7fffffffd520, Ver=..., VerStr=..., Next=0) at pkgcachegen.cc:731
pkgCacheGenerator::MergeListVersion (this=this@entry=0x7fffffffd520, List=..., Pkg=..., Version=..., OutVer=@0x7fffffffc668: 0x0) at pkgcachegen.cc:377
pkgCacheGenerator::MergeList (this=0x7fffffffd520, List=..., OutVer=0x0) at pkgcachegen.cc:222
debPackagesIndex::Merge (this=0x659c40, Gen=..., Prog=<optimized out>) at deb/debindexfile.cc:327
BuildCache (Gen=..., Progress=Progress@entry=0x7fffffffd760, CurrentSize=@0x7fffffffd4c8: 70817943, TotalSize=TotalSize@entry=121542502, Start=..., End=...) at pkgcachegen.cc:1184
pkgCacheGenerator::MakeStatusCache (List=..., Progress=0x7fffffffd760, OutMap=0x7fffffffd8b0, AllowMem=<optimized out>) at pkgcachegen.cc:1376
pkgCacheFile::BuildCaches (this=0x7fffffffd8a0, Progress=0x7fffffffd760, WithLock=true) at cachefile.cc:83
CacheFile::BuildCaches (this=this@entry=0x7fffffffd8a0, WithLock=WithLock@entry=true) at apt-get.cc:101
DoUpdate (CmdL=...) at apt-get.cc:1688
CommandLine::DispatchArg (this=0x7fffffffde50, Map=<optimized out>, NoMatch=<optimized out>) at contrib/cmndline.cc:339
main (argc=<optimized out>, argv=0x7fffffffe6c8) at apt-get.cc:3602
"""

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ubiquity 2.12.12
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu3
Architecture: amd64
CasperVersion: 1.328
Date: Mon Oct 15 22:02:13 2012
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity initrd=/casper/initrd.lz quiet splash -- apt-setup/restricted=false apt-setup/multiverse=false
LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121015.2)
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1067056

[Jean-Baptiste Lallement (jibel)]

Trace of "apt-get update" generated from inside /target after installation crashed.

[Jean-Baptiste Lallement (jibel)]

Content of /etc/apt from /target during installation

[Jean-Baptiste Lallement (jibel)]

Content of /var/lib/apt from /target after the crash.

It contains the index of ddebs.u.c, but apt crashed anyway with these indexes.

[Launchpad Janitor (janitor)]

This bug was fixed in the package apt - 0.9.7.5ubuntu5

---------------
apt (0.9.7.5ubuntu5) quantal; urgency=low

  * Revert "missing remap registration" change from 0.9.7.5ubuntu4; this
    iterator was already registered, and double registration causes a crash
    (LP: #1067056).
 -- Colin Watson <email address hidden> Tue, 16 Oct 2012 11:35:59 +0100