cchardet.UniversalDetector with feed returns None for everything

[slycordinator]

The UniversalDetector() when combined with feed returns {'encoding': None, 'confidence': None} when the "detect" produces the correct result.

import cchardet
from pathlib import Path
UniversalDetect = cchardet.UniversalDetector()
smi = Path('file.smi')

def cchardet_detect(input_file: Path):
    with input_file.open(mode="rb") as ifp:
        data = ifp.read()
    return cchardet.detect(data)

def cchardet_universal(input_file: Path):
    with input_file.open(mode="rb") as ifp:
        for line in ifp:
            UniversalDetect.feed(line)
            if UniversalDetect.done:
                break
    return UniversalDetect.result

cchardet_detect(smi)
cchardet_universal(smi)

The file in question is encoded in UHC (aka CP949).

Output:

>>> cchardet_detect(smi)
{'encoding': 'UHC', 'confidence': 0.9900000095367432}
>>> cchardet_universal(smi)
{'encoding': None, 'confidence': None}

Also of note that:

1. This seems to be related to cChardet returns {'encoding': None, 'confidence': None} on very large file  PyYoshi/cChardet#69
   But the issue linked is reported as being related to the input file being large. My guess is that it was incorrect, as I obtained the same results here with a file that's ~100 kiB.
2. chardet.universaldetector.UniversalDetector() does not suffer from this.

[slycordinator]

Also of note that when I used the UniversalDetector for both cchardet and chardet, both set the "done" attribute at the same number of bytes/lines read. So, cchardet determines when to stop but somehow can't find the encoding info at that point.