{"abstract":"Body rewriting removes source validators from range responses.","category":"HTTP ranges","checks":6,"contract":"Return derived tag after transformation, including None for unavailable derived validators; unchanged responses retain source tag.","contract_signature":"transformed, source_tag, derived_tag","evaluation_group":"s3-http_ranges-representation","failed_approach":"The partial repair uses return derived_tag or source_tag if transformed else source_tag, which still violates the stated contract.","family":"s3-http_ranges-transformation-invalidates-validator","id":"FA-26431","implementations":{"attempt":{"sha256":"a7e6b2d183286d784b9b7004545aaf550a0cac335dacd74ab08cf7e2d9839e94","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(transformed, source_tag, derived_tag):\n    return derived_tag or source_tag if transformed else source_tag\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('transformation-invalidates-validator fixture 0', solve(True,\"s\"+str(N),None), None)\ncheck('transformation-invalidates-validator fixture 1', solve(True,\"s\",\"d\"+str(N)), \"d\"+str(N))\ncheck('transformation-invalidates-validator fixture 2', solve(False,\"s\",\"d\"), \"s\")\ncheck('transformation-invalidates-validator fixture 3', solve(False,None,\"d\"), None)\ncheck('transformation-invalidates-validator fixture 4', solve(True,\"s\",\"\"), \"\")\ncheck('transformation-invalidates-validator fixture 5', solve(True,None,\"d\"), \"d\")\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":"9d3e0545d7c8c49beb68063b42a1f62077cca6ee5419ec4f2a2f5f78dd415f3f","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(transformed, source_tag, derived_tag):\n    return source_tag\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('transformation-invalidates-validator fixture 0', solve(True,\"s\"+str(N),None), None)\ncheck('transformation-invalidates-validator fixture 1', solve(True,\"s\",\"d\"+str(N)), \"d\"+str(N))\ncheck('transformation-invalidates-validator fixture 2', solve(False,\"s\",\"d\"), \"s\")\ncheck('transformation-invalidates-validator fixture 3', solve(False,None,\"d\"), None)\ncheck('transformation-invalidates-validator fixture 4', solve(True,\"s\",\"\"), \"\")\ncheck('transformation-invalidates-validator fixture 5', solve(True,None,\"d\"), \"d\")\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-transformation-invalidates-validator","generated_at":"2026-09-29T14:41:15.945417+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 transformation-invalidates-validator decision uses return source_tag.","sha256":"317f16426beb2704c58e8b41522107164a84ea9170ef4442a69b2cfb7d9e1987","title":"Body rewriting removes source validators from range responses · 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":38.012,"exit_code":1,"observations":[{"actual":"s1","check":"transformation-invalidates-validator fixture 0","expected":null,"passed":false},{"actual":"d1","check":"transformation-invalidates-validator fixture 1","expected":"d1","passed":true},{"actual":"s","check":"transformation-invalidates-validator fixture 2","expected":"s","passed":true},{"actual":null,"check":"transformation-invalidates-validator fixture 3","expected":null,"passed":true},{"actual":"s","check":"transformation-invalidates-validator fixture 4","expected":"","passed":false},{"actual":"d","check":"transformation-invalidates-validator fixture 5","expected":"d","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"transformation-invalidates-validator fixture 0\", \"actual\": \"s1\", \"expected\": null, \"passed\": false}, {\"check\": \"transformation-invalidates-validator fixture 1\", \"actual\": \"d1\", \"expected\": \"d1\", \"passed\": true}, {\"check\": \"transformation-invalidates-validator fixture 2\", \"actual\": \"s\", \"expected\": \"s\", \"passed\": true}, {\"check\": \"transformation-invalidates-validator fixture 3\", \"actual\": null, \"expected\": null, \"passed\": true}, {\"check\": \"transformation-invalidates-validator fixture 4\", \"actual\": \"s\", \"expected\": \"\", \"passed\": false}, {\"check\": \"transformation-invalidates-validator fixture 5\", \"actual\": \"d\", \"expected\": \"d\", \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":39.377,"exit_code":1,"observations":[{"actual":"s1","check":"transformation-invalidates-validator fixture 0","expected":null,"passed":false},{"actual":"s","check":"transformation-invalidates-validator fixture 1","expected":"d1","passed":false},{"actual":"s","check":"transformation-invalidates-validator fixture 2","expected":"s","passed":true},{"actual":null,"check":"transformation-invalidates-validator fixture 3","expected":null,"passed":true},{"actual":"s","check":"transformation-invalidates-validator fixture 4","expected":"","passed":false},{"actual":null,"check":"transformation-invalidates-validator fixture 5","expected":"d","passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"transformation-invalidates-validator fixture 0\", \"actual\": \"s1\", \"expected\": null, \"passed\": false}, {\"check\": \"transformation-invalidates-validator fixture 1\", \"actual\": \"s\", \"expected\": \"d1\", \"passed\": false}, {\"check\": \"transformation-invalidates-validator fixture 2\", \"actual\": \"s\", \"expected\": \"s\", \"passed\": true}, {\"check\": \"transformation-invalidates-validator fixture 3\", \"actual\": null, \"expected\": null, \"passed\": true}, {\"check\": \"transformation-invalidates-validator fixture 4\", \"actual\": \"s\", \"expected\": \"\", \"passed\": false}, {\"check\": \"transformation-invalidates-validator fixture 5\", \"actual\": null, \"expected\": \"d\", \"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."}}