+--- 19:56:28 ~/scripts  $ > python3.6 dupe-detect.py
Traceback (most recent call last):
  File "dupe-detect.py", line 36, in <module>
    with nbt.load(pfile) as pdata:
  File "/usr/local/lib/python3.6/site-packages/nbtlib/nbt.py", line 37, in load
    return File.from_buffer(buff, byteorder)
  File "/usr/local/lib/python3.6/site-packages/nbtlib/nbt.py", line 96, in from_buffer
    self = cls.parse(buff, byteorder)
  File "/usr/local/lib/python3.6/site-packages/nbtlib/tag.py", line 412, in parse
    self[name] = cls.get_tag(tag_id).parse(buff, byteorder)
  File "/usr/local/lib/python3.6/site-packages/nbtlib/tag.py", line 412, in parse
    self[name] = cls.get_tag(tag_id).parse(buff, byteorder)
  File "/usr/local/lib/python3.6/site-packages/nbtlib/tag.py", line 412, in parse
    self[name] = cls.get_tag(tag_id).parse(buff, byteorder)
  File "/usr/local/lib/python3.6/site-packages/nbtlib/tag.py", line 362, in parse
    return cls[tag](tag.parse(buff, byteorder) for _ in range(length))
  File "/usr/local/lib/python3.6/site-packages/nbtlib/tag.py", line 356, in __init__
    super().__init__(map(self._cast, iterable))
  File "/usr/local/lib/python3.6/site-packages/nbtlib/tag.py", line 362, in <genexpr>
    return cls[tag](tag.parse(buff, byteorder) for _ in range(length))
  File "/usr/local/lib/python3.6/site-packages/nbtlib/tag.py", line 296, in parse
    return cls(read_string(buff, byteorder))
  File "/usr/local/lib/python3.6/site-packages/nbtlib/tag.py", line 92, in read_string
    return buff.read(length).decode('ISO-8859-1')
  File "/usr/local/lib/python3.6/gzip.py", line 276, in read
    return self._buffer.read(size)
  File "/usr/local/lib/python3.6/_compression.py", line 68, in readinto
    data = self.read(len(byte_view))
  File "/usr/local/lib/python3.6/gzip.py", line 454, in read
    self._read_eof()
  File "/usr/local/lib/python3.6/gzip.py", line 501, in _read_eof
    hex(self._crc)))
OSError: CRC check failed 0xa501dcc7 != 0x50ddbcf5