Pip reports a nonexistent "-illow" package to be installed

[danijar]

pip version

21.0.1

Python version

3.9

OS

MacOS Big Sur

Additional information

No response

Description

Pip says that I have both the package "Pillow" and the package "-illow" installed. This is a mistake and it breaks the output of pip3 freeze.

Expected behavior

The "-illow" package does not exist and should not be listed in pip3 list or pip3 freeze.

How to Reproduce

I don't know how I got into this state. There is no "-illow" directory in my site-packages folder. The mysterious package shows up in pip3 list and causes pip3 freeze to error.

Output

$ pip3 list
Package            Version
------------------ ---------
-illow             8.1.2
bleach             3.3.0
certifi            2020.12.5
chardet            4.0.0
...
opensimplex        0.3
packaging          20.9
Pillow             8.1.2
pip                21.0.1
...

$ pip3 freeze

WARNING: Could not generate requirement for distribution -illow 8.1.2 (/Users/danijar/Library/Python/3.9/lib/python/site-packages): Parse error at "'-illow=='": Expected W:(abcd...)
bleach==3.3.0
certifi==2020.12.5
chardet==4.0.0
...
opensimplex==0.3
packaging==20.9
Pillow==8.1.2
pkginfo==1.7.0
...

Code of Conduct

• I agree to follow the PSF Code of Conduct

[uranusjr]

Already fixed in #9669, will be in the next release.

This is usually caused by an interrupted pip uninstall or pip install --upgrade. You should delete the directory manually.