cloudpickle pypy3 patch induces infinite recursion issue

[tgbugs]

The cause might be something else, but I'm pretty sure it is that the patch is incomplete and prevents the error but lands us with the issue below.

Traceback (most recent call last):
  File "/usr/lib/pypy3.8/site-packages/cloudpickle/cloudpickle_fast.py", line 602, in dump
    return Pickler.dump(self, obj)
  File "/usr/lib/pypy3.8/pickle.py", line 500, in dump
    self.save(obj)
  File "/usr/lib/pypy3.8/pickle.py", line 616, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib/pypy3.8/pickle.py", line 700, in save_reduce
    save(cls)
  File "/usr/lib/pypy3.8/pickle.py", line 585, in save
    self.save_global(obj)
  File "/usr/lib/pypy3.8/pickle.py", line 1109, in save_global
    self.save(module_name)
  File "/usr/lib/pypy3.8/pickle.py", line 616, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib/pypy3.8/pickle.py", line 700, in save_reduce
    save(cls)