[New-bugs-announce] [issue12611] 2to3 crashes when converting doctest using reduce()

[Vlada Peric]

New submission from Vlada Peric <vlada.peric at gmail.com>:

2to3 crashes when run on a doctest which uses reduce(). This happens with both 2.7 and 3.2's 2to3. I have the following code in a compatibility file, but even using that it fails with the same error: 

try:
    from functools import reduce
except ImportError:
    reduce = reduce

This is the traceback produced:

Traceback (most recent call last):
  File "/usr/local/bin/2to3", line 6, in <module>
    sys.exit(main("lib2to3.fixes"))
  File "/usr/local/lib/python2.6/lib2to3/main.py", line 173, in main
    options.processes)
  File "/usr/local/lib/python2.6/lib2to3/refactor.py", line 620, in refactor
    items, write, doctests_only)
  File "/usr/local/lib/python2.6/lib2to3/refactor.py", line 275, in refactor
    self.refactor_file(dir_or_file, write, doctests_only)
  File "/usr/local/lib/python2.6/lib2to3/refactor.py", line 661, in refactor_file
    *args, **kwargs)
  File "/usr/local/lib/python2.6/lib2to3/refactor.py", line 321, in refactor_file
    output = self.refactor_docstring(input, filename)
  File "/usr/local/lib/python2.6/lib2to3/refactor.py", line 500, in refactor_docstring
    indent, filename))
  File "/usr/local/lib/python2.6/lib2to3/refactor.py", line 530, in refactor_doctest
    assert clipped == [u"\n"] * (lineno-1), clipped
AssertionError: [u'from functools import reduce\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n', u'\n']

----------
components: 2to3 (2.x to 3.0 conversion tool)
messages: 140892
nosy: VPeric
priority: normal
severity: normal
status: open
title: 2to3 crashes when converting doctest using reduce()
versions: Python 2.7, Python 3.2

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12611>
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