{"abstract":"Partial cache entries distinguish selected language variants.","category":"HTTP ranges","checks":6,"contract":"Return composite partial-object cache identity [uri,language,coding]. Empty language represents the default variant and is retained.","evaluation_group":"s3-http_ranges-representation","failed_approach":"The partial repair uses return [uri,language], which still violates the stated contract.","family":"s3-http_ranges-language-variant-cache-key","id":"FA-26426","implementations":{"attempt":{"sha256":"7e5f15e81ba6d933b563589f2b7b011461b337ab1b27dbc20c8b367965d03dd3","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(uri, language, coding):\n    return [uri,language]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('language-variant-cache-key fixture 0', solve(\"/r\"+str(N),\"en\",\"gzip\"), [\"/r\"+str(N),\"en\",\"gzip\"])\ncheck('language-variant-cache-key fixture 1', solve(\"/r\",\"fr\",\"identity\"), [\"/r\",\"fr\",\"identity\"])\ncheck('language-variant-cache-key fixture 2', solve(\"/r\",\"\",\"identity\"), [\"/r\",\"\",\"identity\"])\ncheck('language-variant-cache-key fixture 3', solve(\"/x\",\"en\",\"identity\"), [\"/x\",\"en\",\"identity\"])\ncheck('language-variant-cache-key fixture 4', solve(\"/r\",\"en\",\"br\"), [\"/r\",\"en\",\"br\"])\ncheck('language-variant-cache-key fixture 5', solve(\"/r\",\"fr\",\"gzip\"), [\"/r\",\"fr\",\"gzip\"])\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":"cbf5d3894ccc42d4a3ac5d2b7be5ac916875e10026af6daf2c5ea27c25bcbda0","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(uri, language, coding):\n    return [uri,coding]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('language-variant-cache-key fixture 0', solve(\"/r\"+str(N),\"en\",\"gzip\"), [\"/r\"+str(N),\"en\",\"gzip\"])\ncheck('language-variant-cache-key fixture 1', solve(\"/r\",\"fr\",\"identity\"), [\"/r\",\"fr\",\"identity\"])\ncheck('language-variant-cache-key fixture 2', solve(\"/r\",\"\",\"identity\"), [\"/r\",\"\",\"identity\"])\ncheck('language-variant-cache-key fixture 3', solve(\"/x\",\"en\",\"identity\"), [\"/x\",\"en\",\"identity\"])\ncheck('language-variant-cache-key fixture 4', solve(\"/r\",\"en\",\"br\"), [\"/r\",\"en\",\"br\"])\ncheck('language-variant-cache-key fixture 5', solve(\"/r\",\"fr\",\"gzip\"), [\"/r\",\"fr\",\"gzip\"])\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"},"fixed":{"sha256":"ce09323f1804bbda3345e80b7221636a9b9f0c7db10adcf8a7cd2397a6d0a86c","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(uri, language, coding):\n    return [uri,language,coding]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('language-variant-cache-key fixture 0', solve(\"/r\"+str(N),\"en\",\"gzip\"), [\"/r\"+str(N),\"en\",\"gzip\"])\ncheck('language-variant-cache-key fixture 1', solve(\"/r\",\"fr\",\"identity\"), [\"/r\",\"fr\",\"identity\"])\ncheck('language-variant-cache-key fixture 2', solve(\"/r\",\"\",\"identity\"), [\"/r\",\"\",\"identity\"])\ncheck('language-variant-cache-key fixture 3', solve(\"/x\",\"en\",\"identity\"), [\"/x\",\"en\",\"identity\"])\ncheck('language-variant-cache-key fixture 4', solve(\"/r\",\"en\",\"br\"), [\"/r\",\"en\",\"br\"])\ncheck('language-variant-cache-key fixture 5', solve(\"/r\",\"fr\",\"gzip\"), [\"/r\",\"fr\",\"gzip\"])\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-language-variant-cache-key","generated_at":"2026-09-29T14:41:15.843679+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.","repair":"Apply the bounded decision exactly: return [uri,language,coding]","root_cause":"The language-variant-cache-key decision uses return [uri,coding].","sha256":"f0c7e678544df95b0a6afee6bdbb600eccca8177e8be6f3c5659830fad4dfbbf","title":"Partial cache entries distinguish selected language variants · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":39.002,"exit_code":1,"observations":[{"actual":["/r1","en"],"check":"language-variant-cache-key fixture 0","expected":["/r1","en","gzip"],"passed":false},{"actual":["/r","fr"],"check":"language-variant-cache-key fixture 1","expected":["/r","fr","identity"],"passed":false},{"actual":["/r",""],"check":"language-variant-cache-key fixture 2","expected":["/r","","identity"],"passed":false},{"actual":["/x","en"],"check":"language-variant-cache-key fixture 3","expected":["/x","en","identity"],"passed":false},{"actual":["/r","en"],"check":"language-variant-cache-key fixture 4","expected":["/r","en","br"],"passed":false},{"actual":["/r","fr"],"check":"language-variant-cache-key fixture 5","expected":["/r","fr","gzip"],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"language-variant-cache-key fixture 0\", \"actual\": [\"/r1\", \"en\"], \"expected\": [\"/r1\", \"en\", \"gzip\"], \"passed\": false}, {\"check\": \"language-variant-cache-key fixture 1\", \"actual\": [\"/r\", \"fr\"], \"expected\": [\"/r\", \"fr\", \"identity\"], \"passed\": false}, {\"check\": \"language-variant-cache-key fixture 2\", \"actual\": [\"/r\", \"\"], \"expected\": [\"/r\", \"\", \"identity\"], \"passed\": false}, {\"check\": \"language-variant-cache-key fixture 3\", \"actual\": [\"/x\", \"en\"], \"expected\": [\"/x\", \"en\", \"identity\"], \"passed\": false}, {\"check\": \"language-variant-cache-key fixture 4\", \"actual\": [\"/r\", \"en\"], \"expected\": [\"/r\", \"en\", \"br\"], \"passed\": false}, {\"check\": \"language-variant-cache-key fixture 5\", \"actual\": [\"/r\", \"fr\"], \"expected\": [\"/r\", \"fr\", \"gzip\"], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":39.295,"exit_code":1,"observations":[{"actual":["/r1","gzip"],"check":"language-variant-cache-key fixture 0","expected":["/r1","en","gzip"],"passed":false},{"actual":["/r","identity"],"check":"language-variant-cache-key fixture 1","expected":["/r","fr","identity"],"passed":false},{"actual":["/r","identity"],"check":"language-variant-cache-key fixture 2","expected":["/r","","identity"],"passed":false},{"actual":["/x","identity"],"check":"language-variant-cache-key fixture 3","expected":["/x","en","identity"],"passed":false},{"actual":["/r","br"],"check":"language-variant-cache-key fixture 4","expected":["/r","en","br"],"passed":false},{"actual":["/r","gzip"],"check":"language-variant-cache-key fixture 5","expected":["/r","fr","gzip"],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"language-variant-cache-key fixture 0\", \"actual\": [\"/r1\", \"gzip\"], \"expected\": [\"/r1\", \"en\", \"gzip\"], \"passed\": false}, {\"check\": \"language-variant-cache-key fixture 1\", \"actual\": [\"/r\", \"identity\"], \"expected\": [\"/r\", \"fr\", \"identity\"], \"passed\": false}, {\"check\": \"language-variant-cache-key fixture 2\", \"actual\": [\"/r\", \"identity\"], \"expected\": [\"/r\", \"\", \"identity\"], \"passed\": false}, {\"check\": \"language-variant-cache-key fixture 3\", \"actual\": [\"/x\", \"identity\"], \"expected\": [\"/x\", \"en\", \"identity\"], \"passed\": false}, {\"check\": \"language-variant-cache-key fixture 4\", \"actual\": [\"/r\", \"br\"], \"expected\": [\"/r\", \"en\", \"br\"], \"passed\": false}, {\"check\": \"language-variant-cache-key fixture 5\", \"actual\": [\"/r\", \"gzip\"], \"expected\": [\"/r\", \"fr\", \"gzip\"], \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":36.491,"exit_code":0,"observations":[{"actual":["/r1","en","gzip"],"check":"language-variant-cache-key fixture 0","expected":["/r1","en","gzip"],"passed":true},{"actual":["/r","fr","identity"],"check":"language-variant-cache-key fixture 1","expected":["/r","fr","identity"],"passed":true},{"actual":["/r","","identity"],"check":"language-variant-cache-key fixture 2","expected":["/r","","identity"],"passed":true},{"actual":["/x","en","identity"],"check":"language-variant-cache-key fixture 3","expected":["/x","en","identity"],"passed":true},{"actual":["/r","en","br"],"check":"language-variant-cache-key fixture 4","expected":["/r","en","br"],"passed":true},{"actual":["/r","fr","gzip"],"check":"language-variant-cache-key fixture 5","expected":["/r","fr","gzip"],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"language-variant-cache-key fixture 0\", \"actual\": [\"/r1\", \"en\", \"gzip\"], \"expected\": [\"/r1\", \"en\", \"gzip\"], \"passed\": true}, {\"check\": \"language-variant-cache-key fixture 1\", \"actual\": [\"/r\", \"fr\", \"identity\"], \"expected\": [\"/r\", \"fr\", \"identity\"], \"passed\": true}, {\"check\": \"language-variant-cache-key fixture 2\", \"actual\": [\"/r\", \"\", \"identity\"], \"expected\": [\"/r\", \"\", \"identity\"], \"passed\": true}, {\"check\": \"language-variant-cache-key fixture 3\", \"actual\": [\"/x\", \"en\", \"identity\"], \"expected\": [\"/x\", \"en\", \"identity\"], \"passed\": true}, {\"check\": \"language-variant-cache-key fixture 4\", \"actual\": [\"/r\", \"en\", \"br\"], \"expected\": [\"/r\", \"en\", \"br\"], \"passed\": true}, {\"check\": \"language-variant-cache-key fixture 5\", \"actual\": [\"/r\", \"fr\", \"gzip\"], \"expected\": [\"/r\", \"fr\", \"gzip\"], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}