usb-creator-gtk crashed with AttributeError in _device_changed(): 'NoneType' object has no attribute 'get_object_path'

[Carl Godfrey]

Error occurs after using Startup Disk Creator to erase a USB flash drive.

ProblemType: Crash
DistroRelease: Ubuntu 15.04
Package: usb-creator-gtk 0.2.64
ProcVersionSignature: Ubuntu 3.18.0-12.13-generic 3.18.4
Uname: Linux 3.18.0-12-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.15.1-0ubuntu4
Architecture: amd64
CrashCounter: 1
CurrentDesktop: Unity
Date: Mon Feb 2 10:17:23 2015
ExecutablePath: /usr/bin/usb-creator-gtk
InstallationDate: Installed on 2014-12-12 (52 days ago)
InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Alpha amd64 (20141210)
InterpreterPath: /usr/bin/python3.4
ProcCmdline: /usr/bin/python3 /usr/bin/usb-creator-gtk
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/usb-creator-gtk']
SourcePackage: usb-creator
Title: usb-creator-gtk crashed with AttributeError in _device_changed(): 'NoneType' object has no attribute 'get_object_path'
UDisksDump: Error: [Errno 2] No such file or directory: 'udisks'
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Launchpad Janitor (janitor)]

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

[Ned Hedrick (nedhedrick)]

Note, this bug is also present in 15.10.