I'm an idiot.
It wasn't the rowsAboutToBeRemoved method of the model that was the
problem. It was the rowsAboutToBeRemoved method in one of my
QAbstractItemView subclasses. I was missing the 'self' reference in
the arguments lists.
Duh!
Oh boy, did that take some tracking down. If I'd had an
The method implementation looks like this:
def removeRows(self, position, rows=1, index=QModelIndex()):
# problem on next line, which raises rowsAboutToBeRemoved signal
self.beginRemoveRows(QModelIndex(), position, position + rows - 1)
self.units = self.units[:position] + \
