crash before install complete (because of no swap partition?)

[Andrej]

i installed ubuntu on third partition.
i skipped creation of swap partition (without swap). i have 2 gb ram.
i selected to install boot loader on third partition.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.10.4
ProcVersionSignature: Ubuntu 3.2.0-20.33-generic 3.2.12
Uname: Linux 3.2.0-20-generic x86_64
ApportVersion: 1.95-0ubuntu1
Architecture: amd64
CasperVersion: 1.312
Date: Sat Mar 31 20:47:47 2012
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Mar 31 17:45:43 ubuntu plugininstall.py: SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)
Mar 31 17:45:43 ubuntu plugininstall.py:

[Andrej (andrej004)]

32 bit version on same computer with exactly same settings installed without this error.

[Launchpad Janitor (janitor)]

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