Traceback (most recent call last):
File "/usr/lib/viewvc/lib/viewvc.py", line 4855, in main
request.run_viewvc()
File "/usr/lib/viewvc/lib/viewvc.py", line 408, in run_viewvc
self.view_func(self)
File "/usr/lib/viewvc/lib/viewvc.py", line 3486, in view_diff
p1, p2, rev1, rev2, sym1, sym2 = setup_diff(request)
File "/usr/lib/viewvc/lib/viewvc.py", line 3378, in setup_diff
rev1 = r1 = query_dict['r1']
KeyError: 'r1'