hgview #22469 File diff does not refresh when filtering is applied [open]

When specifying the start rev, then clicking on the files to see their diff, they don't show and I get the following traceback in the terminal

Traceback (most recent call last):
File "/usr/lib/pymodules/python2.6/hgviewlib/qt4/hgfileview.py", line 255, in displayFile
  flag, data = self._model.graph.filedata(filename, self._ctx.rev(), mode)
File "/usr/lib/pymodules/python2.6/hgviewlib/hggraph.py", line 430, in filedata
  parent = self.fileparent(filename, rev)
File "/usr/lib/pymodules/python2.6/hgviewlib/hggraph.py", line 457, in fileparent
  for parent in self.nodesdict[rev].parents:
KeyError: None
appeared in<not specified>
done in<not specified>
closed by<not specified>