/usr/lib/pymodules/python2.6/foolscap/banana.py:2: DeprecationWarning: the sets module is deprecated
  import struct, sets, time
Traceback (most recent call last):
  File "/usr/bin/tahoe", line 8, in <module>
    load_entry_point('allmydata-tahoe==1.5.0', 'console_scripts', 'tahoe')()
  File "/usr/lib/pymodules/python2.6/allmydata/scripts/runner.py", line 91, in run
    rc = runner(sys.argv[1:])
  File "/usr/lib/pymodules/python2.6/allmydata/scripts/runner.py", line 78, in runner
    rc = cli.dispatch[command](so)
  File "/usr/lib/pymodules/python2.6/allmydata/scripts/cli.py", line 436, in cp
    rc = tahoe_cp.copy(options)
  File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_cp.py", line 759, in copy
    return Copier().do_copy(options)
  File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_cp.py", line 444, in do_copy
    self.try_copy()
  File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_cp.py", line 501, in try_copy
    return self.copy_to_directory(sources, target)
  File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_cp.py", line 623, in copy_to_directory
    target.populate(False)
  File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_cp.py", line 150, in populate
    assert os.path.isfile(pn)
AssertionError