{"abstract":"A transport reset cannot leave queued range bytes available for transmission.","category":"HTTP ranges","checks":6,"contract":"Reset returns [empty-queue,zero-credit]; normal operation preserves both.","contract_signature":"reset, queue, credit","evaluation_group":"s3-http_ranges-stream-transfer","failed_approach":"The partial repair uses return [[],credit] if reset else [queue,credit], which still violates the stated contract.","family":"s3-http_ranges-stream-reset-discards-queued-data","id":"FA-26636","implementations":{"attempt":{"sha256":"60d334932a5a166464b20b4ed8ee6e786b7b2c25642908c8f036d4f7e80fe2d6","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(reset, queue, credit):\n    return [[],credit] if reset else [queue,credit]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('stream-reset-discards-queued-data fixture 0', solve(True,[\"x\"*N],N), [[],0])\ncheck('stream-reset-discards-queued-data fixture 1', solve(True,[],N), [[],0])\ncheck('stream-reset-discards-queued-data fixture 2', solve(True,[\"x\"],0), [[],0])\ncheck('stream-reset-discards-queued-data fixture 3', solve(False,[\"x\"*N],N), [[\"x\"*N],N])\ncheck('stream-reset-discards-queued-data fixture 4', solve(False,[],0), [[],0])\ncheck('stream-reset-discards-queued-data fixture 5', solve(False,[],N), [[],N])\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":"ef430d57ab5fc31101fb40b625944d2430511766eda8de4e3ab5d295ff0a7cd4","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(reset, queue, credit):\n    return [queue,0] if reset else [queue,credit]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('stream-reset-discards-queued-data fixture 0', solve(True,[\"x\"*N],N), [[],0])\ncheck('stream-reset-discards-queued-data fixture 1', solve(True,[],N), [[],0])\ncheck('stream-reset-discards-queued-data fixture 2', solve(True,[\"x\"],0), [[],0])\ncheck('stream-reset-discards-queued-data fixture 3', solve(False,[\"x\"*N],N), [[\"x\"*N],N])\ncheck('stream-reset-discards-queued-data fixture 4', solve(False,[],0), [[],0])\ncheck('stream-reset-discards-queued-data fixture 5', solve(False,[],N), [[],N])\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-stream-reset-discards-queued-data","generated_at":"2026-09-29T14:41:17.711206+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 stream-reset-discards-queued-data decision uses return [queue,0] if reset else [queue,credit].","sha256":"477a3ec8135397781ce3098a5d8396d6536e9422723b793ffb8b2a37ca0c4b94","title":"A transport reset cannot leave queued range bytes available for transmission · 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":40.589,"exit_code":1,"observations":[{"actual":[[],1],"check":"stream-reset-discards-queued-data fixture 0","expected":[[],0],"passed":false},{"actual":[[],1],"check":"stream-reset-discards-queued-data fixture 1","expected":[[],0],"passed":false},{"actual":[[],0],"check":"stream-reset-discards-queued-data fixture 2","expected":[[],0],"passed":true},{"actual":[["x"],1],"check":"stream-reset-discards-queued-data fixture 3","expected":[["x"],1],"passed":true},{"actual":[[],0],"check":"stream-reset-discards-queued-data fixture 4","expected":[[],0],"passed":true},{"actual":[[],1],"check":"stream-reset-discards-queued-data fixture 5","expected":[[],1],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"stream-reset-discards-queued-data fixture 0\", \"actual\": [[], 1], \"expected\": [[], 0], \"passed\": false}, {\"check\": \"stream-reset-discards-queued-data fixture 1\", \"actual\": [[], 1], \"expected\": [[], 0], \"passed\": false}, {\"check\": \"stream-reset-discards-queued-data fixture 2\", \"actual\": [[], 0], \"expected\": [[], 0], \"passed\": true}, {\"check\": \"stream-reset-discards-queued-data fixture 3\", \"actual\": [[\"x\"], 1], \"expected\": [[\"x\"], 1], \"passed\": true}, {\"check\": \"stream-reset-discards-queued-data fixture 4\", \"actual\": [[], 0], \"expected\": [[], 0], \"passed\": true}, {\"check\": \"stream-reset-discards-queued-data fixture 5\", \"actual\": [[], 1], \"expected\": [[], 1], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":40.365,"exit_code":1,"observations":[{"actual":[["x"],0],"check":"stream-reset-discards-queued-data fixture 0","expected":[[],0],"passed":false},{"actual":[[],0],"check":"stream-reset-discards-queued-data fixture 1","expected":[[],0],"passed":true},{"actual":[["x"],0],"check":"stream-reset-discards-queued-data fixture 2","expected":[[],0],"passed":false},{"actual":[["x"],1],"check":"stream-reset-discards-queued-data fixture 3","expected":[["x"],1],"passed":true},{"actual":[[],0],"check":"stream-reset-discards-queued-data fixture 4","expected":[[],0],"passed":true},{"actual":[[],1],"check":"stream-reset-discards-queued-data fixture 5","expected":[[],1],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"stream-reset-discards-queued-data fixture 0\", \"actual\": [[\"x\"], 0], \"expected\": [[], 0], \"passed\": false}, {\"check\": \"stream-reset-discards-queued-data fixture 1\", \"actual\": [[], 0], \"expected\": [[], 0], \"passed\": true}, {\"check\": \"stream-reset-discards-queued-data fixture 2\", \"actual\": [[\"x\"], 0], \"expected\": [[], 0], \"passed\": false}, {\"check\": \"stream-reset-discards-queued-data fixture 3\", \"actual\": [[\"x\"], 1], \"expected\": [[\"x\"], 1], \"passed\": true}, {\"check\": \"stream-reset-discards-queued-data fixture 4\", \"actual\": [[], 0], \"expected\": [[], 0], \"passed\": true}, {\"check\": \"stream-reset-discards-queued-data fixture 5\", \"actual\": [[], 1], \"expected\": [[], 1], \"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."}}