Crash: UnknownItem

[boxed]

dumps(parse('d*e-1'))

produces this error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/andersh/Projects/mutmut/env/lib/python2.7/site-packages/baron/baron.py", line 49, in parse
    tokens = tokenize(source_code, False)
  File "/Users/andersh/Projects/mutmut/env/lib/python2.7/site-packages/baron/baron.py", line 70, in tokenize
    return mark_indentation(inner_group(space_group(_tokenize(group(split(pouet)), print_function))))
  File "/Users/andersh/Projects/mutmut/env/lib/python2.7/site-packages/baron/tokenizer.py", line 92, in tokenize
    return list(tokenize_generator(sequence, print_function))
  File "/Users/andersh/Projects/mutmut/env/lib/python2.7/site-packages/baron/tokenizer.py", line 114, in tokenize_generator
    raise UnknowItem("Can't find a matching token for this item: '%s'" % item)
baron.tokenizer.UnknowItem: Can't find a matching token for this item: 'e-1'