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stfc__fparser-431

This is a preserved training example. Membership in the current training wave has not been verified.
stfc/fparser · Task 156 of 169

Problem statement

where statement bug in fparser1
There is a bug in the processing of fparser1 for where statements. We get the internal expression on output instead of the value of the external expression. For example, the following input code ...

```
subroutine columnwise_op_asm_m2v_lumped_inv_kernel_code()
  where (columnwise_matrix(:,:,cell) /= 0.0_r_solver)
     columnwise_matrix(:,:,cell) = 1.0_r_solver/columnwise_matrix(:,:,cell)
  end where
end subroutine columnwise_op_asm_m2v_lumped_inv_kernel_code
```

gives

```
!BEGINSOURCE
  SUBROUTINE columnwise_op_asm_m2v_lumped_inv_kernel_code()
    WHERE ( F2PY_EXPR_TUPLE_1 )
      columnwise_matrix(:,:,cell) = 1.0_r_solver/columnwise_matrix(:,:,cell)
    END WHERE
  END SUBROUTINE columnwise_op_asm_m2v_lumped_inv_kernel_code
```

We are not actively supporting fparser1 anymore, however, PSyclone still uses it for parsing LFRic and this fixes that bug without having to wait for the new fparser2/psyir parsing of LFRic which will take some time to complete.

Training membership

opd_e4b_pure_v6a opd_e4b_pure_v6b opd_e4b_self_audit_v4

Task issues extracted from preserved verified_rft_messages training examples. This is not a verified current RL wave manifest.

Task and snapshot provenance

Snapshot captured 2026-11-12T17:06:59.476467+00:00 · Autoresearch-Arena/gemma-4-developer-agent

{
  "datasets": [
    "opd_e4b_pure_v6a",
    "opd_e4b_pure_v6b",
    "opd_e4b_self_audit_v4"
  ],
  "examples": 5,
  "instance_id": "stfc__fparser-431",
  "problem_statement": "where statement bug in fparser1\nThere is a bug in the processing of fparser1 for where statements. We get the internal expression on output instead of the value of the external expression. For example, the following input code ...\r\n\r\n```\r\nsubroutine columnwise_op_asm_m2v_lumped_inv_kernel_code()\r\n  where (columnwise_matrix(:,:,cell) /= 0.0_r_solver)\r\n     columnwise_matrix(:,:,cell) = 1.0_r_solver/columnwise_matrix(:,:,cell)\r\n  end where\r\nend subroutine columnwise_op_asm_m2v_lumped_inv_kernel_code\r\n```\r\n\r\ngives\r\n\r\n```\r\n!BEGINSOURCE\r\n  SUBROUTINE columnwise_op_asm_m2v_lumped_inv_kernel_code()\r\n    WHERE ( F2PY_EXPR_TUPLE_1 )\r\n      columnwise_matrix(:,:,cell) = 1.0_r_solver/columnwise_matrix(:,:,cell)\r\n    END WHERE\r\n  END SUBROUTINE columnwise_op_asm_m2v_lumped_inv_kernel_code\r\n```\r\n\r\nWe are not actively supporting fparser1 anymore, however, PSyclone still uses it for parsing LFRic and this fixes that bug without having to wait for the new fparser2/psyir parsing of LFRic which will take some time to complete.",
  "repo": "stfc/fparser",
  "source": "v2/experiments/train_data/opd_e4b_pure_v6a/verified_rft_messages.jsonl",
  "source_sha256": "f045b7ca5b3883a1e2eaee81e1c02a4a1b53dd7b7b36e98bacb2ba5823a15148"
}
{
  "captured_at": "2026-11-12T17:06:59.476467+00:00",
  "membership": "archived training",
  "membership_evidence": "Task issues extracted from preserved verified_rft_messages training examples. This is not a verified current RL wave manifest.",
  "name": "Preserved post-training task archive",
  "source": "Autoresearch-Arena/gemma-4-developer-agent",
  "source_revision": "016496de222aaafca0d4ee4c18efc63ba616f76e",
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    },
    {
      "path": "v2/experiments/train_data/opd_e4b_self_audit_v4/verified_rft_messages.jsonl",
      "sha256": "0026023745afb8f3dc1c176dc7f7171157b4ad5a66656b524af218e8e19ceee6"
    },
    {
      "path": "v2/experiments/train_data/rft_e4b_aligned_v2/verified_rft_messages.jsonl",
      "sha256": "92a4515fee9d152b0d4c510ee3ce4caaaffe2003ba7584469f8027f174aab18c"
    },
    {
      "path": "v2/experiments/train_data/rft_v1/verified_rft_messages.jsonl",
      "sha256": "a42453ccd7ac7680b0a03865e8e7080bc8bf74c8d9d193b440c441ed46f8512b"
    },
    {
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      "sha256": "18f4b3bd7e651f83c6acab479c9475e3fa50dc652a384f309e97146983ac85ba"
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}