stderr

/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py:1705: PicklingWarning: Cannot locate reference to <class 'bytes_iterator'>.
  warnings.warn('Cannot locate reference to %r.' % (obj,), PicklingWarning)

/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py:1707: PicklingWarning: Cannot pickle <class 'bytes_iterator'>: builtins.bytes_iterator has recursive self-references that trigger a RecursionError.
  warnings.warn('Cannot pickle %r: %s.%s has recursive self-references that trigger a RecursionError.' % (obj, obj.__module__, obj_name), PicklingWarning)

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 263, in dumps
    dump(obj, file, protocol, byref, fmode, recurse, **kwds)#, strictio)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 235, in dump
    Pickler(file, protocol, **_kwds).dump(obj)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 394, in dump
    StockPickler.dump(self, obj)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 487, in dump
    self.save(obj)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 388, in save
    StockPickler.save(self, obj, save_persistent_id)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 560, in save
    f(self, obj)  # Call unbound method with explicit self
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 1698, in save_type
    _save_with_postproc(pickler, (_create_type, (
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 1070, in _save_with_postproc
    pickler.save_reduce(*reduction, obj=obj)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 692, in save_reduce
    save(args)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 388, in save
    StockPickler.save(self, obj, save_persistent_id)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 560, in save
    f(self, obj)  # Call unbound method with explicit self
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 902, in save_tuple
    save(element)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 388, in save
    StockPickler.save(self, obj, save_persistent_id)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 560, in save
    f(self, obj)  # Call unbound method with explicit self
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 1186, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 972, in save_dict
    self._batch_setitems(obj.items())
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 998, in _batch_setitems
    save(v)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 388, in save
    StockPickler.save(self, obj, save_persistent_id)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 560, in save
    f(self, obj)  # Call unbound method with explicit self
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 1439, in save_wrapper_descriptor
    pickler.save_reduce(_getattr, (obj.__objclass__, obj.__name__,
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 692, in save_reduce
    save(args)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 388, in save
    StockPickler.save(self, obj, save_persistent_id)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 560, in save
    f(self, obj)  # Call unbound method with explicit self
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 887, in save_tuple
    save(element)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 388, in save
    StockPickler.save(self, obj, save_persistent_id)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 560, in save
    f(self, obj)  # Call unbound method with explicit self
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/site-packages/dill/_dill.py", line 1711, in save_type
    StockPickler.save_global(pickler, obj, name=obj_name)
  File "/home/sam/Downloads/test/.spack-env/view/lib/python3.10/pickle.py", line 1071, in save_global
    raise PicklingError(

_pickle.PicklingError: Can't pickle <class 'bytes_iterator'>: it's not found as builtins.bytes_iterator