Python 3: range objects cannot be sliced

[Alan G Isaac]

Is the behavior below expected? Documented?
(The error msg is misleading.)
Thanks,
Alan Isaac

>>> x = range(20)
>>> s = slice(None,None,2)
>>> x[s]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: sequence index must be integer, not 'slice'
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