Comment 23 for bug 1038522

Someone on a forum suggested a tweak in PartitionModel.py.
Supposedly, it solves:
AttributeError: 'Partition' object has no attribute 'parent'

Original
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parentItem = childItem.parent()
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Tweak
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try:
        parentItem = childItem.parent()
except AttributeError:
        parentItem = self.rootItem
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Reference:
http://askubuntu.com/questions/287338/kubuntu-13-04-installer-crashes-on-manual-partition-setup