Bug report

I believe tell should never be negative, even for /dev/urandom. And @benjaminp wrote ToDo that it shouldn't be negative.

>>> from pathlib import Path
>>> urandom = Path('/dev/urandom').open('rb')
>>> urandom.tell()
0
>>> urandom.read(1)
b'$'
>>> urandom.tell()
-4095

Environment

Fedora linux, python 3.10.6

Linked PRs

• gh-95782: Fix io.BufferedReader.tell etc. being able to return offsets < 0 #99709
• [3.12] gh-95782: Fix io.BufferedReader.tell() etc. being able to return offsets < 0 (GH-99709) #115599
• [3.11] gh-95782: Fix io.BufferedReader.tell() etc. being able to return offsets < 0 (GH-99709) #115600