python 3.13.0a6 tests throw errors due to pickling a _ThreadHandle #182
Description
Tests seem to error out due to: uqfoundation/dill#654
Basically...
$ python test_multiprocessing_forkserver/test_manager.py
EEEEEEE.sEEEEE.EEE........E....E........s.s.s.....s...s...ss.EE.E.ssE.E..s
where all errors end in:
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.13/lib/python3.13/pickle.py", line 574, in save
rv = reduce(self.proto)
~~~~~~^^^^^^^^^^^^
TypeError: cannot pickle '_thread._ThreadHandle' object
Interestingly, 3.13.0a5 doesn't trigger any errors, while the code is nearly identical.