Dagster-Pipes tutorial bug doing Asset Checks

[EvanZ]

What's the issue or suggestion?

I'm able to follow the dagster-pipes tutorial fine up until Part 2, the section with asset checks:
https://docs.dagster.io/concepts/dagster-pipes/subprocess/modify-external-code#report-asset-checks

At this point I am getting the following error message from the UI:

dagster._check.functions.CheckError: Member of iterable mismatches type. Expected (<class 'dagster._core.definitions.assets.AssetsDefinition'>, <class 'dagster._core.definitions.asset_spec.AssetSpec'>, <class 'dagster._core.definitions.source_asset.SourceAsset'>, <class 'dagster._core.definitions.cacheable_assets.CacheableAssetsDefinition'>). Got ('child', KeysAssetSelection(selected_keys=[AssetKey(['subprocess_asset'])])) of type <class 'tuple'>.

  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_grpc/impl.py", line 130, in core_execute_run
    recon_job.get_definition()
  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_core/definitions/reconstruct.py", line 268, in get_definition
    return check.not_none(self.get_repository_definition()).get_maybe_subset_job_def(
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_core/definitions/reconstruct.py", line 262, in get_repository_definition
    return self.repository.get_definition()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_core/definitions/reconstruct.py", line 120, in get_definition
    return repository_def_from_pointer(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_core/definitions/reconstruct.py", line 776, in repository_def_from_pointer
    target = def_from_pointer(pointer)
             ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_core/definitions/reconstruct.py", line 647, in def_from_pointer
    target = pointer.load_target()
             ^^^^^^^^^^^^^^^^^^^^^
  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_core/code_pointer.py", line 174, in load_target
    module = load_python_file(self.python_file, self.working_directory)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_core/code_pointer.py", line 83, in load_python_file
    return import_module_from_path(module_name, python_file)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_seven/__init__.py", line 46, in import_module_from_path
    spec.loader.exec_module(module)
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/ubuntu/boosting-behavior-models/src/scripts/dagster_code.py", line 29, in <module>
    defs = Definitions(
           ^^^^^^^^^^^^
  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_core/definitions/definitions_class.py", line 450, in __new__
    return super().__new__(
           ^^^^^^^^^^^^^^^^
  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_record/__init__.py", line 362, in __call__
    return self._nt_base.__new__(cls, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<string>", line 7, in __checked_new__
  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_check/functions.py", line 1218, in opt_nullable_iterable_param
    return iterable_param(obj, param_name, of_type, additional_message)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_check/functions.py", line 1194, in iterable_param
    return _check_iterable_items(obj, of_type, "iterable")
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ubuntu/miniforge3/envs/venv/lib/python3.11/site-packages/dagster/_check/functions.py", line 1783, in _check_iterable_items
    raise CheckError(

Additional information

No response

Message from the maintainers

Impacted by this issue? Give it a 👍! We factor engagement into prioritization.

[garethbrickman]

What version of Dagster are you using?

[EvanZ]

What version of Dagster are you using?

1.8.8