The 2to3 fixer translates this code:
    range(42)[::-1]
into this one:
    list(range(42)[::-1]
which throws an error when run with Python 3:

Traceback (most recent call last):
  File "test.py", line 1, in <module>
    print(list(range(42)[::-1]))
TypeError: sequence index must be integer, not 'slice'