Arch Linux

Description:
Virt-manager itself opens, and allows you to run machines or perform maintenance with the control panel. Attempting to spawn a VM window (to actually view the console or details) however doesn't work. virt-manager --debug spits out the following error:

Traceback (most recent call last):
File "/usr/share/virt-manager/virtManager/manager.py", line 489, in row_activated
self.show_vm(_src)
File "/usr/share/virt-manager/virtManager/manager.py", line 474, in show_vm
vmmenu.VMActionUI.show(self, self.current_vm())
File "/usr/share/virt-manager/virtManager/vmmenu.py", line 329, in show
from .vmwindow import vmmVMWindow
File "/usr/share/virt-manager/virtManager/vmwindow.py", line 15, in <module>
from .details.details import vmmDetails
File "/usr/share/virt-manager/virtManager/details/details.py", line 18, in <module>
from ..addhardware import vmmAddHardware
File "/usr/share/virt-manager/virtManager/addhardware.py", line 23, in <module>
from .device.fsdetails import vmmFSDetails
File "/usr/share/virt-manager/virtManager/device/fsdetails.py", line 14, in <module>
from ..storagebrowse import vmmStorageBrowser
File "/usr/share/virt-manager/virtManager/storagebrowse.py", line 11, in <module>
from .hoststorage import vmmHostStorage
File "/usr/share/virt-manager/virtManager/hoststorage.py", line 17, in <module>
from .createpool import vmmCreatePool
File "/usr/share/virt-manager/virtManager/createpool.py", line 18, in <module>
from .xmleditor import vmmXMLEditor
File "/usr/share/virt-manager/virtManager/xmleditor.py", line 6, in <module>
gi.require_version('GtkSource', '4')
File "/usr/lib/python3.7/site-packages/gi/__init__.py", line 129, in require_version
raise ValueError('Namespace %s not available' % namespace)
ValueError: Namespace GtkSource not available

Installing gtksourceview4 from the extra repository solves this problem (everything works fine). The prior virt-manager version (2.1.0-2) does not need gtksourceview4 installed to function, so this appears to be a new required dependency for virt-manager 2.2.0.

Additional info:
* package version(s)
* config and/or log files etc.
* link to upstream bug report, if any

Steps to reproduce:

As above: open virt-manager 2.2.0 and it loads, but will not load a console/details window of any VM. Installing gtksourceview4 resolves this issue, and it is not listed as a dependency or optional dependency for virt-manager 2.2.0.