{"abstract":"Incomplete sample-frame bytes are returned as playable data.","category":"PCM sample encoding","checks":8,"contract":"Locate a bounded AU-like PCM byte body at an absolute data offset; -1 alone means unknown size, and incomplete frame bytes are returned separately.","contract_signature":"buffers, offset, declared, frame_bytes","evaluation_group":"s3-pcm-au-pcm-payload-limit","failed_approach":"A frame count is mistakenly used as byte slice length.","family":"s3-pcm-au-pcm-payload-limit-whole-frame-prefix","id":"FA-49556","implementations":{"attempt":{"sha256":"427f7e15e2f3e9b36f02c947dd7590e91d43db8e302bc12c418faf656728727f","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(buffers, offset, declared, frame_bytes):\n    out=[]\n    for blob in buffers:\n        body=blob[min(offset,len(blob)):]\n        body=body if declared==-1 else body[:max(0,declared)]\n        complete=len(body)//frame_bytes\n        out.append([body[:complete],body[complete:]])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('oracle 1', solve(*([[9, 9, 1, 2, 3, 4, 5]], 2, -1, 2)), [[[1, 2, 3, 4], [5]]])\ncheck('oracle 2', solve(*([[0, 1, 2, 3, 4]], 1, 3, 2)), [[[1, 2], [3]]])\ncheck('oracle 3', solve(*([[0, 1, 2]], 1, 0, 1)), [[[], []]])\ncheck('oracle 4', solve(*([[]], 4, -1, 2)), [[[], []]])\ncheck('oracle 5', solve(*([], 2, 4, 2)), [])\ncheck('oracle 6', solve(*([[9, 1, 2, 3, 4]], 1, 8, 3)), [[[1, 2, 3], [4]]])\ncheck('oracle 7', solve(*([[9, 1, 2, 3]], 1, 2, 2)), [[[1, 2], []]])\nif N == 1: check('variant packet 1', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 2: check('variant packet 2', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 3: check('variant packet 3', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 4: check('variant packet 4', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 5: check('variant packet 5', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"326232ff2694ca1a58c79941b2eecf2eff5b4ac4ef5e76cf35adf719743fcc58","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(buffers, offset, declared, frame_bytes):\n    out=[]\n    for blob in buffers:\n        body=blob[min(offset,len(blob)):]\n        body=body if declared==-1 else body[:max(0,declared)]\n        complete=len(body)\n        out.append([body[:complete],body[complete:]])\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('oracle 1', solve(*([[9, 9, 1, 2, 3, 4, 5]], 2, -1, 2)), [[[1, 2, 3, 4], [5]]])\ncheck('oracle 2', solve(*([[0, 1, 2, 3, 4]], 1, 3, 2)), [[[1, 2], [3]]])\ncheck('oracle 3', solve(*([[0, 1, 2]], 1, 0, 1)), [[[], []]])\ncheck('oracle 4', solve(*([[]], 4, -1, 2)), [[[], []]])\ncheck('oracle 5', solve(*([], 2, 4, 2)), [])\ncheck('oracle 6', solve(*([[9, 1, 2, 3, 4]], 1, 8, 3)), [[[1, 2, 3], [4]]])\ncheck('oracle 7', solve(*([[9, 1, 2, 3]], 1, 2, 2)), [[[1, 2], []]])\nif N == 1: check('variant packet 1', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 2: check('variant packet 2', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 3: check('variant packet 3', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 4: check('variant packet 4', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nif N == 5: check('variant packet 5', solve(*[[[9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5], [9, 9, 1, 2, 3, 4, 5]], 2, -1, 2]), [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]])\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":"Stipulated finite model; no claim of hardware timing or full file-format conformance. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"s3-pcm-au-pcm-payload-limit-whole-frame-prefix","generated_at":"2026-09-29T14:45:01.157790+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Offline PCM interchange uses these exact bounded packet and sample representation decisions.","root_cause":"Incomplete sample-frame bytes are returned as playable data.","sha256":"55102da8b831d68af5b03399b030a5f8cbeeb9aa165851109a6ad364b3dfd53c","title":"Au pcm payload limit: whole frame prefix · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":47.488,"exit_code":1,"observations":[{"actual":[[[1,2],[3,4,5]]],"check":"oracle 1","expected":[[[1,2,3,4],[5]]],"passed":false},{"actual":[[[1],[2,3]]],"check":"oracle 2","expected":[[[1,2],[3]]],"passed":false},{"actual":[[[],[]]],"check":"oracle 3","expected":[[[],[]]],"passed":true},{"actual":[[[],[]]],"check":"oracle 4","expected":[[[],[]]],"passed":true},{"actual":[],"check":"oracle 5","expected":[],"passed":true},{"actual":[[[1],[2,3,4]]],"check":"oracle 6","expected":[[[1,2,3],[4]]],"passed":false},{"actual":[[[1],[2]]],"check":"oracle 7","expected":[[[1,2],[]]],"passed":false},{"actual":[[[1,2],[3,4,5]],[[1,2],[3,4,5]]],"check":"variant packet 1","expected":[[[1,2,3,4],[5]],[[1,2,3,4],[5]]],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"oracle 1\", \"actual\": [[[1, 2], [3, 4, 5]]], \"expected\": [[[1, 2, 3, 4], [5]]], \"passed\": false}, {\"check\": \"oracle 2\", \"actual\": [[[1], [2, 3]]], \"expected\": [[[1, 2], [3]]], \"passed\": false}, {\"check\": \"oracle 3\", \"actual\": [[[], []]], \"expected\": [[[], []]], \"passed\": true}, {\"check\": \"oracle 4\", \"actual\": [[[], []]], \"expected\": [[[], []]], \"passed\": true}, {\"check\": \"oracle 5\", \"actual\": [], \"expected\": [], \"passed\": true}, {\"check\": \"oracle 6\", \"actual\": [[[1], [2, 3, 4]]], \"expected\": [[[1, 2, 3], [4]]], \"passed\": false}, {\"check\": \"oracle 7\", \"actual\": [[[1], [2]]], \"expected\": [[[1, 2], []]], \"passed\": false}, {\"check\": \"variant packet 1\", \"actual\": [[[1, 2], [3, 4, 5]], [[1, 2], [3, 4, 5]]], \"expected\": [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":39.545,"exit_code":1,"observations":[{"actual":[[[1,2,3,4,5],[]]],"check":"oracle 1","expected":[[[1,2,3,4],[5]]],"passed":false},{"actual":[[[1,2,3],[]]],"check":"oracle 2","expected":[[[1,2],[3]]],"passed":false},{"actual":[[[],[]]],"check":"oracle 3","expected":[[[],[]]],"passed":true},{"actual":[[[],[]]],"check":"oracle 4","expected":[[[],[]]],"passed":true},{"actual":[],"check":"oracle 5","expected":[],"passed":true},{"actual":[[[1,2,3,4],[]]],"check":"oracle 6","expected":[[[1,2,3],[4]]],"passed":false},{"actual":[[[1,2],[]]],"check":"oracle 7","expected":[[[1,2],[]]],"passed":true},{"actual":[[[1,2,3,4,5],[]],[[1,2,3,4,5],[]]],"check":"variant packet 1","expected":[[[1,2,3,4],[5]],[[1,2,3,4],[5]]],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"oracle 1\", \"actual\": [[[1, 2, 3, 4, 5], []]], \"expected\": [[[1, 2, 3, 4], [5]]], \"passed\": false}, {\"check\": \"oracle 2\", \"actual\": [[[1, 2, 3], []]], \"expected\": [[[1, 2], [3]]], \"passed\": false}, {\"check\": \"oracle 3\", \"actual\": [[[], []]], \"expected\": [[[], []]], \"passed\": true}, {\"check\": \"oracle 4\", \"actual\": [[[], []]], \"expected\": [[[], []]], \"passed\": true}, {\"check\": \"oracle 5\", \"actual\": [], \"expected\": [], \"passed\": true}, {\"check\": \"oracle 6\", \"actual\": [[[1, 2, 3, 4], []]], \"expected\": [[[1, 2, 3], [4]]], \"passed\": false}, {\"check\": \"oracle 7\", \"actual\": [[[1, 2], []]], \"expected\": [[[1, 2], []]], \"passed\": true}, {\"check\": \"variant packet 1\", \"actual\": [[[1, 2, 3, 4, 5], []], [[1, 2, 3, 4, 5], []]], \"expected\": [[[1, 2, 3, 4], [5]], [[1, 2, 3, 4], [5]]], \"passed\": false}], \"passed\": false}\n"}},"member_only":{"stages":["fixed"],"fields":["implementations.fixed","verification.fixed","harness","repair"],"note":"The verified repair, its recorded checks, the repair description, and the scoring harness are available to members."}}