Installer crashes when checking for packages to install

[João Esquecido]

Lubuntu 12.04 instller crashes during slideshow, while "Checking for packages to install".
I'm trying to install on an Acer TravelMate 370 (Pentium M, 2GB of RAM) on a partition with 15GB (automatically created during installation by manually deleting the 15GB partition and letting the installer create whatever partitions is finds necessary).

I'm trying this version of Lubuntu because I had problems installing newer versions due to a problem with PAE.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.10.29
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic i686
ApportVersion: 2.0.1-0ubuntu5
Architecture: i386
CasperVersion: 1.315
Date: Mon Jun 26 04:50:56 2017
InstallCmdLine: file=/cdrom/preseed/lubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- keyboard-configuration/layoutcode=pt
LiveMediaBuild: Lubuntu 12.04 "Precise Pangolin" - Release i386 (20120423)
ProcEnviron:
 TERM=unknown
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Jun 26 03:04:40 lubuntu plugininstall.py: Traceback (most recent call last):
Jun 26 03:04:40 lubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1730, in <module>
Jun 26 03:04:40 lubuntu plugininstall.py: install.run()
Jun 26 03:04:40 lubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 55, in wrapper
Jun 26 03:04:40 lubuntu plugininstall.py: func(self)
Jun 26 03:04:40 lubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 174, in run
Jun 26 03:04:40 lubuntu plugininstall.py: self.install_language_packs()
Jun 26 03:04:40 lubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 664, in install_language_packs
Jun 26 03:04:40 lubuntu plugininstall.py: self.do_install(self.langpacks, langpacks=True)
Jun 26 03:04:40 lubuntu plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 856, in do_install
Jun 26 03:04:40 lubuntu plugininstall.py: with Cache() as cache:
Jun 26 03:04:40 lubuntu plugininstall.py: AttributeError: __exit__
Jun 26 03:04:40 lubuntu plugininstall.py:

[Phillip Susi (psusi)]

12.04 has reached end of life and is no longer supported.