ubiquity crashes on ubuntu installation

[Mikhail Paulyshka]

Some info:
- Installation from USB3.0 flash drive
- UEFI mode
- WiFi connection

Crashes after packages loading on configuring step.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: ubiquity 16.10.5
ProcVersionSignature: Ubuntu 4.4.0-33.52-generic 4.4.15
Uname: Linux 4.4.0-33-generic x86_64
ApportVersion: 2.20.3-0ubuntu5
Architecture: amd64
CasperVersion: 1.376
Date: Tue Aug 9 02:40:32 2016
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 16.10 "Yakkety Yak" - Alpha amd64 (20160808)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Paul White (paulw2u)]

[User no longer uses Launchpad]

From UbiquitySyslog.txt which was added to this bug report:

Aug 8 23:36:41 ubuntu kernel: [ 157.124887] squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sda3

I'm closing this report as this wasn't a bug with the Ubuntu installer.