msgpack__msgpack-python-388

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

{
  "datasets": [
    "opd_e4b_pure_v7",
    "opd_e4b_pure_v7b"
  ],
  "examples": 7,
  "instance_id": "msgpack__msgpack-python-388",
  "problem_statement": "Broken fallback implementation of Unpacker.read_bytes\n```\r\n>>> from msgpack import *\r\n>>> u = Unpacker(); u.feed('x'); u.read_bytes(1)\r\n'x'\r\n>>> u.next()\r\nTraceback (most recent call last):\r\n  File \"<stdin>\", line 1, in <module>\r\n  File \"msgpack/_unpacker.pyx\", line 562, in msgpack._cmsgpack.Unpacker.__next__\r\n  File \"msgpack/_unpacker.pyx\", line 489, in msgpack._cmsgpack.Unpacker._unpack\r\nStopIteration: No more data to unpack.\r\n>>> u.feed('\\1'); u.next()\r\n1\r\n```\r\nSo far so good. Now with fallback implémentation:\r\n```\r\n>>> from msgpack.fallback import *\r\n>>> u = Unpacker(); u.feed('x'); u.read_bytes(1)\r\nbytearray(b'x')\r\n>>> u.next()\r\nTraceback (most recent call last):\r\n  File \"<stdin>\", line 1, in <module>\r\n  File \"/usr/lib/python2.7/dist-packages/msgpack/fallback.py\", line 690, in __next__\r\n    raise StopIteration\r\nStopIteration\r\n>>> u.feed('\\1'); u.next()\r\n120\r\n```\r\nSomething seems to be wrongly reset on StopIteration.\n\n## Hints:\ncodecov-io: # [Codecov](https://codecov.io/gh/msgpack/msgpack-python/pull/388?src=pr&el=h1) Report\n> Merging [#388](https://codecov.io/gh/msgpack/msgpack-python/pull/388?src=pr&el=desc) into [master](https://codecov.io/gh/msgpack/msgpack-python/commit/7a8ce0f9ca910a851b6835d26b1d6970a188fa4e?src=pr&el=desc) will **increase** coverage by `0.02%`.\n> The diff coverage is `100%`.\n\n[![Impacted file tree graph](https://codecov.io/gh/msgpack/msgpack-python/pull/388/graphs/tree.svg?width=650&token=1HDgK8EAlP&height=150&src=pr)](https://codecov.io/gh/msgpack/msgpack-python/pull/388?src=pr&el=tree)\n\n```diff\n@@            Coverage Diff             @@\n##           master     #388      +/-   ##\n==========================================\n+ Coverage   87.96%   87.99%   +0.02%     \n==========================================\n  Files           5        5              \n  Lines         806      808       +2     \n==========================================\n+ Hits          709      711       +2     \n  Misses         97       97\n```\n\n\n| [Impacted Files](https://codecov.io/gh/msgpack/msgpack-python/pull/388?src=pr&el=tree) | Coverage Δ | |\n|---|---|---|\n| [msgpack/fallback.py](https://codecov.io/gh/msgpack/msgpack-python/pull/388/diff?src=pr&el=tree#diff-bXNncGFjay9mYWxsYmFjay5weQ==) | `89.03% <100%> (+0.03%)` | :arrow_up: |\n\n------\n\n[Continue to review full report at Codecov](https://codecov.io/gh/msgpack/msgpack-python/pull/388?src=pr&el=continue).\n> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)\n> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`\n> Powered by [Codecov](https://codecov.io/gh/msgpack/msgpack-python/pull/388?src=pr&el=footer). Last update [7a8ce0f...15e017a](https://codecov.io/gh/msgpack/msgpack-python/pull/388?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).",
  "repo": "msgpack/msgpack-python",
  "source": "v2/experiments/train_data/opd_e4b_pure_v7/verified_rft_messages.jsonl",
  "source_sha256": "e37f7bd675322f3f81500b73559d60d5f602ca0537bf19f5cb06332c728c7b72"
}

{
  "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",
  "sources": [
    {
      "path": "v2/experiments/train_data/opd_e4b_cispo_v5/verified_rft_messages.jsonl",
      "sha256": "a43610ad0dfb6ace95375cfae09000f41afc0338cc925af870a4ade7a9b20c4c"
    },
    {
      "path": "v2/experiments/train_data/opd_e4b_hybrid_v3/verified_rft_messages.jsonl",
      "sha256": "bd326303eb127e8e5e08f03daf97bb88d79d19709d59f3f93f348bc56686a8df"
    },
    {
      "path": "v2/experiments/train_data/opd_e4b_onpolicy_v3/verified_rft_messages.jsonl",
      "sha256": "960c680e797e823a0d3a22f4b1d5ef60a72971373d703b877340b0c9126aaf68"
    },
    {
      "path": "v2/experiments/train_data/opd_e4b_pure_v6a/verified_rft_messages.jsonl",
      "sha256": "f045b7ca5b3883a1e2eaee81e1c02a4a1b53dd7b7b36e98bacb2ba5823a15148"
    },
    {
      "path": "v2/experiments/train_data/opd_e4b_pure_v6b/verified_rft_messages.jsonl",
      "sha256": "0f62460a9706eea5e1605255896f191ab00cb5706c5f1f2e1c293e9a718218dc"
    },
    {
      "path": "v2/experiments/train_data/opd_e4b_pure_v7/verified_rft_messages.jsonl",
      "sha256": "e37f7bd675322f3f81500b73559d60d5f602ca0537bf19f5cb06332c728c7b72"
    },
    {
      "path": "v2/experiments/train_data/opd_e4b_pure_v7b/verified_rft_messages.jsonl",
      "sha256": "b864bdc8695183433eef6e31cb8d33fad44ba3aded2170c1ade4ad5b2944ce23"
    },
    {
      "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"
    },
    {
      "path": "v2/experiments/train_data/rft_v2/verified_rft_messages.jsonl",
      "sha256": "18f4b3bd7e651f83c6acab479c9475e3fa50dc652a384f309e97146983ac85ba"
    }
  ]
}