Ubuntu 15.04 installer crashes on MacBook Pro mid-2010

[Basil]

Installer ran for 30min or so and crashed during the second progress bar, about 1/2 way through.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ubiquity 2.21.25
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic i686
NonfreeKernelModules: wl
ApportVersion: 2.17.2-0ubuntu1
Architecture: i386
CasperVersion: 1.360
Date: Mon Jul 13 16:39:52 2015
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity
LiveMediaBuild: Ubuntu 15.04 "Vivid Vervet" - Release i386 (20150422)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

A program crashed with an illegal instruction exception. This is usually due to bad ram. Please run the memtest option from the boot menu and let it go for at least 30 minutes to see if your ram is bad.

[Launchpad Janitor (janitor)]

[Expired for ubiquity (Ubuntu) because there has been no activity for 60 days.]