"./python Lib/test/regrtest.py test_zipimport_support" pass, but not with the -R option.

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$ ./python Lib/test/regrtest.py -R 3:3: test_zipimport_support
[1/1] test_zipimport_support
beginning 6 repetitions
123456
test test_zipimport_support failed -- Traceback (most recent call last):
  File "/home/haypo/prog/SVN/py3k/Lib/test/test_zipimport_support.py", line 96, in test_inspect_getsource_issue4223
    self.assertEqual(inspect.getsource(zip_pkg.foo), test_src)
  File "/home/haypo/prog/SVN/py3k/Lib/inspect.py", line 693, in getsource
    lines, lnum = getsourcelines(object)
  File "/home/haypo/prog/SVN/py3k/Lib/inspect.py", line 682, in getsourcelines
    lines, lnum = findsource(object)
  File "/home/haypo/prog/SVN/py3k/Lib/inspect.py", line 530, in findsource
    raise IOError('could not get source code')
IOError: could not get source code

1 test failed:
    test_zipimport_support
----