There is always dom0 (domid=0) added, but it has None as self.xml.
@@ -912,6 +912,8 @@ class PropertyHolder(qubes.events.Emitter):
:param int load_stage: Stage of loading.
'''
+ if self.xml is None:
+ return
all_names = set(
prop.__name__ for prop in self.property_list(load_stage))
for node in self.xml.xpath('./properties/property'):