Ubuntu 18.04 Installer Crashed

[CBrider]

I was attempting to install Ubuntu 18.04 on a Kingston SDD partition that previously had 16.04 installed. I did not format the partition, I just set it to the file system root. All user directories are symlinked to another drive. Other than that, I can't think of anything particularly unusual about this installation. The EXT4 partition I was installing to is the only partition inside an extended partition. The drive also has two other primary partitions with Windows and Windows recovery.

I was not at the computer when the bug happened.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CasperVersion: 1.394
Date: Wed May 30 17:05:09 2018
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity
LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[CBrider (zaknafien13)]

syslog