Python 3.11 cannot load object saved with 3.10

[ryandgoldenberg]

Objects that are serialized using Python 3.10 produce an error when attempting to load with Python 3.11

Version: cloudpickle==3.1.1

Steps to reproduce:

Save object using Python 3.10

import cloudpickle
squared = lambda x: x ** 2
with open('squared.pkl', 'wb') as f:
  cloudpickle.dump(squared, f)

Load object using Python 3.11

import cloudpickle
with open('squared.pkl', 'rb') as f:
  squared = cloudpickle.load(f)

...

Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
TypeError: code() argument 13 must be str, not int