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Cannot extract the features (columns) for the split 'test' of the config 'default' of the dataset.
Error code:   FeaturesError
Exception:    TypeError
Message:      'str' object is not a mapping
Traceback:    Traceback (most recent call last):
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 290, in _generate_tables
                  pa_table = paj.read_json(
                      io.BytesIO(batch), read_options=paj.ReadOptions(block_size=block_size)
                  )
                File "pyarrow/_json.pyx", line 342, in pyarrow._json.read_json
                File "pyarrow/error.pxi", line 155, in pyarrow.lib.pyarrow_internal_check_status
                  return check_status(status)
                File "pyarrow/error.pxi", line 92, in pyarrow.lib.check_status
                  raise convert_status(status)
              pyarrow.lib.ArrowInvalid: JSON parse error: Column() changed from object to string in row 0
              
              During handling of the above exception, another exception occurred:
              
              Traceback (most recent call last):
                File "/src/services/worker/src/worker/job_runners/split/first_rows.py", line 244, in compute_first_rows_from_streaming_response
                  iterable_dataset = iterable_dataset._resolve_features()
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 4408, in _resolve_features
                  features = _infer_features_from_batch(self.with_format(None)._head())
                                                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2679, in _head
                  return next(iter(self.iter(batch_size=n)))
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2861, in iter
                  for key, pa_table in ex_iterable.iter_arrow():
                                       ~~~~~~~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2395, in _iter_arrow
                  yield from self.ex_iterable._iter_arrow()
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 536, in _iter_arrow
                  for key, pa_table in iterator:
                                       ^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 419, in _iter_arrow
                  for key, pa_table in self.generate_tables_fn(**gen_kwags):
                                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 304, in _generate_tables
                  batch = json_encode_fields_in_json_lines(original_batch, json_field_paths)
                File "/usr/local/lib/python3.14/site-packages/datasets/utils/json.py", line 113, in json_encode_fields_in_json_lines
                  examples = [json_encode_field(example, json_field_path) for example in examples]
                              ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/utils/json.py", line 34, in json_encode_field
                  return {**example, field: json_encode_field(example.get(field), json_field_path)}
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
              TypeError: 'str' object is not a mapping

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ryzax/res-vllm

Copy of ryzax/res with vLLM-tool AIME25 runs swapped into the SUMM and LASTK folders. Original ryzax/res is unchanged.

All swapped/added runs are Qwen3-1.7B, AIME25 (30 problems × 64 samples), window 4096, max gen 262144, BUDGET_FORCE_SAVING=256 for summary variants.

Swaps

Path What it is now AIME25 avg@64 cov@64 maj@64
Qwen3-1.7B-SUMM/w4096s256 force256 + SAVING_PROMPT=context_system 26.5% 56.7% 40.0%
Qwen3-1.7B-LASTK/w4096k256 last-k 256 with subtract 23.8% 50.0% 36.7%

Previously these folders held the Hugging Face Transformers SUMM (w4096s256) and LASTK (w4096k256) runs from Oct 2025.

SUMM ablations

Path Prompt avg@64 cov@64 maj@64
Qwen3-1.7B-SUMM/w4096s256context force256 + context 26.4% 53.3% 36.7%
Qwen3-1.7B-SUMM/w4096s256context_maybe force256 + context_maybe 25.8% 46.7% 40.0%
Qwen3-1.7B-SUMM/w4096s256contextnoshot force256 + context, no few-shot example in the system prompt 23.2% 33.3% 33.3%

LASTK ablations

Path Setting avg@64 cov@64 maj@64
Qwen3-1.7B-LASTK/w4096k256nosubtract last-k 256, no subtract 26.3% 53.3% 43.3%

Dense / sliding-window folders are the same files as ryzax/res.

Length metrics and budget-clipped avg

results_*.json scored only the last assistant window (~3k tokens), so tok@ is too small and avg@ jumps by 4k. Use:

  • results_*.tokfixed.json — full-trace tok@ / too_long@ from tool_usage.generated_tokens (accuracy unchanged)
  • results_concatted_tok262144.jsonaime/utils.py rerun on concatenated saving windows + final (the old completions_to_return_concatted path). Full-budget avg matches the original; mid-budget avg rises with true length.
Path tok@262144@64 avg@4k@64 avg@32k@64 avg@262k@64
Qwen3-1.7B-SUMM/w4096s256 123615 14.8% 22.3% 26.5%
Qwen3-1.7B-SUMM/w4096s256context 122880 15.5% 22.4% 26.4%
Qwen3-1.7B-SUMM/w4096s256context_maybe 139369 15.6% 22.9% 25.8%
Qwen3-1.7B-SUMM/w4096s256contextnoshot 153125 4.7% 19.2% 23.2%
Qwen3-1.7B-LASTK/w4096k256 129723 3.5% 20.1% 23.9%
Qwen3-1.7B-LASTK/w4096k256nosubtract 128707 3.2% 20.4% 26.3%
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