virt-manager 'NoneType' object has no attribute 'get_default_storage_format'

[commiethebeastie]

'NoneType' object has no attribute 'get_default_storage_format'

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/engine.py", line 889, in _do_show_create
    self._get_create_dialog().show(src.topwin, uri)
  File "/usr/share/virt-manager/virtManager/create.py", line 170, in show
    self.reset_state(uri)
  File "/usr/share/virt-manager/virtManager/create.py", line 393, in reset_state
    self.addstorage.reset_state()
  File "/usr/share/virt-manager/virtManager/addstorage.py", line 196, in reset_state
    fmt = self.conn.get_default_storage_format()
AttributeError: 'NoneType' object has no attribute 'get_default_storage_format'

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: virt-manager 1:1.0.1-5ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
Uname: Linux 3.19.0-16-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue May 12 15:51:32 2015
InstallationDate: Installed on 2015-05-08 (4 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
PackageArchitecture: all
SourcePackage: virt-manager
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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