{"abstract":"Request member limits apply before deduplication.","category":"HTTP ranges","checks":6,"contract":"Return accept iff raw parsed member count<=limit, reject otherwise; repeated ranges still consume parser budget.","contract_signature":"members, limit","evaluation_group":"s3-http_ranges-request-fields","failed_approach":"The partial repair uses return \"accept\" if len(members)<limit else \"reject\", which still violates the stated contract.","family":"s3-http_ranges-range-count-before-coalescing","id":"FA-26671","implementations":{"attempt":{"sha256":"5a22951064e627e715c6a5f9e88b459cbfaa94249c702c3f3aa41576487cd0ed","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(members, limit):\n    return \"accept\" if len(members)<limit else \"reject\"\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('range-count-before-coalescing fixture 0', solve( [\"0-1\"]*(N+1),N), \"reject\")\ncheck('range-count-before-coalescing fixture 1', solve([\"0-1\"]*N,N), \"accept\")\ncheck('range-count-before-coalescing fixture 2', solve([],0), \"accept\")\ncheck('range-count-before-coalescing fixture 3', solve([\"0-1\"],0), \"reject\")\ncheck('range-count-before-coalescing fixture 4', solve([\"0-1\",\"2-3\"],2), \"accept\")\ncheck('range-count-before-coalescing fixture 5', solve([\"0-1\"],3), \"accept\")\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":"1772ca2d882d91d24a712f7dc054969854560ada49117ed80736021f9840eaa5","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(members, limit):\n    return \"accept\" if len(set(members))<=limit else \"reject\"\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('range-count-before-coalescing fixture 0', solve( [\"0-1\"]*(N+1),N), \"reject\")\ncheck('range-count-before-coalescing fixture 1', solve([\"0-1\"]*N,N), \"accept\")\ncheck('range-count-before-coalescing fixture 2', solve([],0), \"accept\")\ncheck('range-count-before-coalescing fixture 3', solve([\"0-1\"],0), \"reject\")\ncheck('range-count-before-coalescing fixture 4', solve([\"0-1\",\"2-3\"],2), \"accept\")\ncheck('range-count-before-coalescing fixture 5', solve([\"0-1\"],3), \"accept\")\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":"Deterministic simplified range service, with stipulated local policies and already parsed trusted inputs; not a complete HTTP implementation. 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-http_ranges-range-count-before-coalescing","generated_at":"2026-09-29T14:41:18.135838+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Range responses combine representation identity, conditional requests, framing, and partial-object state.","root_cause":"The range-count-before-coalescing decision uses return \"accept\" if len(set(members))<=limit else \"reject\".","sha256":"bf4090ff0493e14f0c7be95cbee6825b52b4baf5c8e2857a10d98883e8b05144","title":"Request member limits apply before deduplication · 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":39.264,"exit_code":1,"observations":[{"actual":"reject","check":"range-count-before-coalescing fixture 0","expected":"reject","passed":true},{"actual":"reject","check":"range-count-before-coalescing fixture 1","expected":"accept","passed":false},{"actual":"reject","check":"range-count-before-coalescing fixture 2","expected":"accept","passed":false},{"actual":"reject","check":"range-count-before-coalescing fixture 3","expected":"reject","passed":true},{"actual":"reject","check":"range-count-before-coalescing fixture 4","expected":"accept","passed":false},{"actual":"accept","check":"range-count-before-coalescing fixture 5","expected":"accept","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"range-count-before-coalescing fixture 0\", \"actual\": \"reject\", \"expected\": \"reject\", \"passed\": true}, {\"check\": \"range-count-before-coalescing fixture 1\", \"actual\": \"reject\", \"expected\": \"accept\", \"passed\": false}, {\"check\": \"range-count-before-coalescing fixture 2\", \"actual\": \"reject\", \"expected\": \"accept\", \"passed\": false}, {\"check\": \"range-count-before-coalescing fixture 3\", \"actual\": \"reject\", \"expected\": \"reject\", \"passed\": true}, {\"check\": \"range-count-before-coalescing fixture 4\", \"actual\": \"reject\", \"expected\": \"accept\", \"passed\": false}, {\"check\": \"range-count-before-coalescing fixture 5\", \"actual\": \"accept\", \"expected\": \"accept\", \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":38.269,"exit_code":1,"observations":[{"actual":"accept","check":"range-count-before-coalescing fixture 0","expected":"reject","passed":false},{"actual":"accept","check":"range-count-before-coalescing fixture 1","expected":"accept","passed":true},{"actual":"accept","check":"range-count-before-coalescing fixture 2","expected":"accept","passed":true},{"actual":"reject","check":"range-count-before-coalescing fixture 3","expected":"reject","passed":true},{"actual":"accept","check":"range-count-before-coalescing fixture 4","expected":"accept","passed":true},{"actual":"accept","check":"range-count-before-coalescing fixture 5","expected":"accept","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"range-count-before-coalescing fixture 0\", \"actual\": \"accept\", \"expected\": \"reject\", \"passed\": false}, {\"check\": \"range-count-before-coalescing fixture 1\", \"actual\": \"accept\", \"expected\": \"accept\", \"passed\": true}, {\"check\": \"range-count-before-coalescing fixture 2\", \"actual\": \"accept\", \"expected\": \"accept\", \"passed\": true}, {\"check\": \"range-count-before-coalescing fixture 3\", \"actual\": \"reject\", \"expected\": \"reject\", \"passed\": true}, {\"check\": \"range-count-before-coalescing fixture 4\", \"actual\": \"accept\", \"expected\": \"accept\", \"passed\": true}, {\"check\": \"range-count-before-coalescing fixture 5\", \"actual\": \"accept\", \"expected\": \"accept\", \"passed\": true}], \"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."}}