Unable to define a list of dictionaries in a schema dataclass

[dustinblack]

Describe the bug

When attempting to define a dataclass object as a list of dictionaries:

    latency_hist: typing.List[typing.Dict[str, str]]

A traceback is consistently encountered:

Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 6794, in _resolve_list_annotation
    cls._resolve_abstract_type(
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 6281, in _resolve_abstract_type
    result = cls._resolve(t, type_hints, path, scope)
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 6342, in _resolve
    return cls._resolve_dict_annotation(t, type_hints, path, scope)
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 6875, in _resolve_dict_annotation
    args[1], arg_hints[1], tuple(values_path), scope
IndexError: tuple index out of range

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/app/arcaflow_plugin_rtla/tests/test_arcaflow_plugin_rtla.py", line 3, in <module>
    import rtla_plugin
  File "/app/arcaflow_plugin_rtla/rtla_plugin.py", line 31, in <module>
    class StartTimerlatStep:
  File "/app/arcaflow_plugin_rtla/rtla_plugin.py", line 60, in StartTimerlatStep
    def run_timerlat(
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/plugin.py", line 143, in step_decorator
    scope = build_object_schema(outputs[response_id])
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 7013, in build_object_schema
    r = _SchemaBuilder.resolve(t, scope)
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 6271, in resolve
    return cls._resolve_abstract_type(t, t, tuple(path), scope)
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 6281, in _resolve_abstract_type
    result = cls._resolve(t, type_hints, path, scope)
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 6324, in _resolve
    return cls._resolve_type(t, type_hints, path, scope)
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 6377, in _resolve_type
    return cls._resolve_class(t, type_hints, path, scope)
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 6569, in _resolve_class
    name, final_field = cls._resolve_dataclass_field(
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 6409, in _resolve_dataclass_field
    underlying_type = cls._resolve_field(t.type, type_hints, path, scope)
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 6308, in _resolve_field
    result = cls._resolve(t, type_hints, path, scope)
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 6340, in _resolve
    return cls._resolve_list_annotation(t, type_hints, path, scope)
  File "/usr/local/lib/python3.9/site-packages/arcaflow_plugin_sdk/schema.py", line 6799, in _resolve_list_annotation
    raise SchemaBuildException(
arcaflow_plugin_sdk.schema.SchemaBuildException: Invalid schema definition for TimerlatOutput -> latency_hist: Failed to create list type