Chunk eq errors when comparing objects to it

[Helveg]

When eq'ed against a hemitype node:

Traceback (most recent call last):
  File "/mnt/d/GIT/bsb/tests/test_placement.py", line 193, in test_notparallel_cs_job
    pool.execute()
  File "/mnt/d/GIT/bsb/bsb/services/pool.py", line 288, in execute
    job.execute(self.owner, job.f, job._args, job._kwargs)
  File "/mnt/d/GIT/bsb/bsb/services/pool.py", line 184, in execute
    return f(connectivity, *collections, **kwargs)
  File "/mnt/d/GIT/bsb/tests/test_placement.py", line 180, in connect
    test.assertEqual(Chunk([0, 0, 0], None), chunk)
  File "/home/robin/.pyenv/versions/3.9.1/lib/python3.9/unittest/case.py", line 831, in assertEqual
    assertion_func(first, second, msg=msg)
  File "/home/robin/.pyenv/versions/3.9.1/lib/python3.9/unittest/case.py", line 821, in _baseAssertEqual
    if not first == second:
  File "/mnt/d/GIT/bsb/bsb/storage/_chunks.py", line 31, in __eq__
    other_id = np.array(other, copy=False).view(Chunk)._safe_id()
  File "/mnt/d/GIT/bsb/bsb/connectivity/strategy.py", line 37, in __getattr__
    return self.placement[attr]
KeyError: '__array_struct__'

when eq'ed against a ConnectionStrategy:

Python 3.9.1 (default, Feb 18 2021, 16:03:49)
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from bsb.storage import Chunk
>>> from bsb.connectivity import ConnectionStrategy
>>> ConnectionStrategy()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/mnt/d/GIT/bsb/bsb/config/_make.py", line 57, in __call__
    instance = meta_subject.__new__(
  File "/mnt/d/GIT/bsb/bsb/config/_make.py", line 179, in __new__
    ncls = class_determinant(_cls, kwargs)
  File "/mnt/d/GIT/bsb/bsb/config/_make.py", line 373, in _get_dynamic_class
    raise RequirementError(f"Dynamic node must contain a '{attr_name}' attribute")
bsb.exceptions.RequirementError: Dynamic node must contain a 'strategy' attribute
>>> class X(ConnectionStrategy):
...  def connect(): pass
...  def get_region_of_interest(): pass
...
>>> x = X()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/mnt/d/GIT/bsb/bsb/config/_make.py", line 57, in __call__
    instance = meta_subject.__new__(
  File "/mnt/d/GIT/bsb/bsb/config/_make.py", line 184, in __new__
    instance.__post_new__(**kwargs)
  File "/mnt/d/GIT/bsb/bsb/config/_make.py", line 218, in __post_new__
    raise RequirementError(f"Missing required attribute '{name}'")
bsb.exceptions.RequirementError: Missing required attribute 'presynaptic'
>>> x = X(presynaptic={"cell_types": []},postsynaptic={"cell_types": []}, strategy="")
>>> Chunk([0,0,0], None) == x
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/mnt/d/GIT/bsb/bsb/storage/_chunks.py", line 31, in __eq__
    other_id = np.array(other, copy=False).view(Chunk)._safe_id()
  File "/mnt/d/GIT/bsb/bsb/storage/_chunks.py", line 61, in _safe_id
    return int(self) if self.shape == () else self.id
TypeError: int() argument must be a string, a bytes-like object or a number, not 'X'
>>> x == Chunk([0,0,0], None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/mnt/d/GIT/bsb/bsb/storage/_chunks.py", line 31, in __eq__
    other_id = np.array(other, copy=False).view(Chunk)._safe_id()
  File "/mnt/d/GIT/bsb/bsb/storage/_chunks.py", line 61, in _safe_id
    return int(self) if self.shape == () else self.id
TypeError: int() argument must be a string, a bytes-like object or a number, not 'X'