pygrib open does not allow io.BufferedReader object

[Tamburasca]

According to the version 2.1.5 release

• allow pygrib.open to take an io.BufferedReader object as an argument

reading BufferedReader objects is supposed to work now. I got version 2.1.6, though, and I reckoned that the following code should work then as well:

import requests
import io
import pygrib

response = requests.get("https://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.20241123/00/atmos/gfs.t00z.pgrb2.0p25.f000")
response.raise_for_status()

f = io.BytesIO(response.content)
buffer_io = io.BufferedReader(f)
fsss = pygrib.open(buffer_io)
for item in fsss:
    print(item)

However, I get an error
Traceback (most recent call last):
File "/home/ralf/pycharm-projects/testStuff/gfs/gfs_http_download.py", line 18, in
fsss = pygrib.open(buffer_io)
File "src/pygrib/_pygrib.pyx", line 338, in pygrib._pygrib.open.cinit
io.UnsupportedOperation: fileno

Is there something I may have disregarded?

Thanks.