Salt-Master broken in 3.12

I'm seeing the following errors when attempting to process any return data from any salt minions on Alpine 3.12, even something as simple as a ping test causes it to fail.

salt_1     | [WARNING ] /usr/lib/python3.8/site-packages/salt/utils/dictdiffer.py:16: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3, and in 3.9 it will stop working
salt_1     |   from collections import Mapping
salt_1     | 
salt_1     | Process salt.transport.zeromq.<class 'method'>._publish_daemon:
salt_1     | Traceback (most recent call last):
salt_1     |   File "/usr/lib/python3.8/multiprocessing/process.py", line 315, in _bootstrap
salt_1     |     self.run()
salt_1     |   File "/usr/lib/python3.8/multiprocessing/process.py", line 108, in run
salt_1     |     self._target(*self._args, **self._kwargs)
salt_1     |   File "/usr/lib/python3.8/site-packages/salt/transport/zeromq.py", line 920, in _publish_daemon
salt_1     |     unpacked_package = salt.payload.unpackage(package)
salt_1     |   File "/usr/lib/python3.8/site-packages/salt/payload.py", line 47, in unpackage
salt_1     |     return salt.utils.msgpack.loads(package_, use_list=True)
salt_1     |   File "/usr/lib/python3.8/site-packages/salt/utils/msgpack.py", line 128, in unpackb
salt_1     |     return msgpack.unpackb(packed, **_sanitize_msgpack_kwargs(kwargs))
salt_1     |   File "msgpack/_unpacker.pyx", line 195, in msgpack._cmsgpack.unpackb
salt_1     | UnicodeDecodeError: 'utf-8' codec can't decode byte 0x83 in position 0: invalid start byte
salt_1     | [ERROR   ] Future <salt.ext.tornado.concurrent.Future object at 0x7fcc862eeee0> exception was never retrieved: Traceback (most recent call last):
salt_1     |   File "/usr/lib/python3.8/site-packages/salt/ext/tornado/gen.py", line 309, in wrapper
salt_1     |     yielded = next(result)
salt_1     |   File "/usr/lib/python3.8/site-packages/salt/utils/process.py", line 531, in run
salt_1     |     self.check_children()
salt_1     |   File "/usr/lib/python3.8/site-packages/salt/utils/process.py", line 556, in check_children
salt_1     |     for pid, mapping in six.iteritems(self._process_map):
salt_1     | RuntimeError: dictionary keys changed during iteration
salt_1     | Process salt.transport.zeromq.<class 'method'>._publish_daemon:
salt_1     | Traceback (most recent call last):
salt_1     |   File "/usr/lib/python3.8/multiprocessing/process.py", line 315, in _bootstrap
salt_1     |     self.run()
salt_1     |   File "/usr/lib/python3.8/multiprocessing/process.py", line 108, in run
salt_1     |     self._target(*self._args, **self._kwargs)
salt_1     |   File "/usr/lib/python3.8/site-packages/salt/transport/zeromq.py", line 920, in _publish_daemon
salt_1     |     unpacked_package = salt.payload.unpackage(package)
salt_1     |   File "/usr/lib/python3.8/site-packages/salt/payload.py", line 47, in unpackage
salt_1     |     return salt.utils.msgpack.loads(package_, use_list=True)
salt_1     |   File "/usr/lib/python3.8/site-packages/salt/utils/msgpack.py", line 128, in unpackb
salt_1     |     return msgpack.unpackb(packed, **_sanitize_msgpack_kwargs(kwargs))
salt_1     |   File "msgpack/_unpacker.pyx", line 195, in msgpack._cmsgpack.unpackb
salt_1     | UnicodeDecodeError: 'utf-8' codec can't decode byte 0x83 in position 0: invalid start byte

Digging into this a little bit, Salt is working on full support for Python3.8 in the 3001, but in the meantime things are woefully broken.

Edgan on Freenode #salt suggested the following patch This is what he's using currently to overcome the 3.8 incompatibilities and has successfully deployed saltstack 3000.2 on Ubuntu 20.04 with it.

salt-py3.8.patch

There's some additional information available here: https://github.com/saltstack/salt/issues/55835