Program crashes on some inputs

[1Hyena]

Getting the below error

Traceback (most recent call last):
  File "/usr/bin/nostril", line 25, in <module>
    plac.call(main)
  File "/usr/lib/python3.7/site-packages/plac_core.py", line 330, in call
    cmd, result = parser.consume(arglist)
  File "/usr/lib/python3.7/site-packages/plac_core.py", line 207, in consume
    return cmd, self.func(*(args + varargs + extraopts), **kwargs)
  File "/usr/lib/python3.7/site-packages/nostril/__main__.py", line 83, in main
    analyze(strings, trace)
  File "/usr/lib/python3.7/site-packages/nostril/__main__.py", line 95, in analyze
    'nonsense' if nonsense(s) else 'real'))
UnicodeEncodeError: 'utf-8' codec can't encode characters in position 906-917: surrogates not allowed

when trying to detect gibberish from user-generated content.