{"abstract":"Unsupported range units fall back to the full representation.","category":"HTTP ranges","checks":6,"contract":"This server implements only bytes. Unknown units are ignored with [200,full], bytes returns [206,part]. Unit tokens are already lowercase.","evaluation_group":"s3-http_ranges-request-fields","failed_approach":"The partial repair uses return [416,\"\"] if unit!=\"bytes\" else [206,part], which still violates the stated contract.","family":"s3-http_ranges-range-unsupported-unit-ignore","id":"FA-26661","implementations":{"attempt":{"sha256":"5484be74762cc9c4503b760015541fd09fe1b03bf4d6321c5e2d3b4264144ad4","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(unit, full, part):\n    return [416,\"\"] if unit!=\"bytes\" else [206,part]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('range-unsupported-unit-ignore fixture 0', solve(\"items\",\"f\"*N,\"p\"), [200,\"f\"*N])\ncheck('range-unsupported-unit-ignore fixture 1', solve(\"bytes\",\"fff\",\"p\"*N), [206,\"p\"*N])\ncheck('range-unsupported-unit-ignore fixture 2', solve(\"other\",\"abc\",\"b\"), [200,\"abc\"])\ncheck('range-unsupported-unit-ignore fixture 3', solve(\"\",\"abc\",\"b\"), [200,\"abc\"])\ncheck('range-unsupported-unit-ignore fixture 4', solve(\"bytes\",\"\",\"\"), [206,\"\"])\ncheck('range-unsupported-unit-ignore fixture 5', solve(\"lines\",\"\",\"\"), [200,\"\"])\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":"1481fbbde6aea8348421e1ce78d9414ae7f1c8fa794c961d41b1b2e15b5e2637","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(unit, full, part):\n    return [206,part]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('range-unsupported-unit-ignore fixture 0', solve(\"items\",\"f\"*N,\"p\"), [200,\"f\"*N])\ncheck('range-unsupported-unit-ignore fixture 1', solve(\"bytes\",\"fff\",\"p\"*N), [206,\"p\"*N])\ncheck('range-unsupported-unit-ignore fixture 2', solve(\"other\",\"abc\",\"b\"), [200,\"abc\"])\ncheck('range-unsupported-unit-ignore fixture 3', solve(\"\",\"abc\",\"b\"), [200,\"abc\"])\ncheck('range-unsupported-unit-ignore fixture 4', solve(\"bytes\",\"\",\"\"), [206,\"\"])\ncheck('range-unsupported-unit-ignore fixture 5', solve(\"lines\",\"\",\"\"), [200,\"\"])\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":"3731ad10faa40920332c218736582b63b66e0caf584a4a9cdd7e9509c09d442f","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(unit, full, part):\n    return [206,part] if unit==\"bytes\" else [200,full]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('range-unsupported-unit-ignore fixture 0', solve(\"items\",\"f\"*N,\"p\"), [200,\"f\"*N])\ncheck('range-unsupported-unit-ignore fixture 1', solve(\"bytes\",\"fff\",\"p\"*N), [206,\"p\"*N])\ncheck('range-unsupported-unit-ignore fixture 2', solve(\"other\",\"abc\",\"b\"), [200,\"abc\"])\ncheck('range-unsupported-unit-ignore fixture 3', solve(\"\",\"abc\",\"b\"), [200,\"abc\"])\ncheck('range-unsupported-unit-ignore fixture 4', solve(\"bytes\",\"\",\"\"), [206,\"\"])\ncheck('range-unsupported-unit-ignore fixture 5', solve(\"lines\",\"\",\"\"), [200,\"\"])\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-unsupported-unit-ignore","generated_at":"2026-09-29T14:41:18.075022+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 [206,part] if unit==\"bytes\" else [200,full]","root_cause":"The range-unsupported-unit-ignore decision uses return [206,part].","sha256":"f89734c1ce26f14f754ed876950febed30ebd8e1dcce5f5cf984d83925cfce94","title":"Unsupported range units fall back to the full representation · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":38.141,"exit_code":1,"observations":[{"actual":[416,""],"check":"range-unsupported-unit-ignore fixture 0","expected":[200,"f"],"passed":false},{"actual":[206,"p"],"check":"range-unsupported-unit-ignore fixture 1","expected":[206,"p"],"passed":true},{"actual":[416,""],"check":"range-unsupported-unit-ignore fixture 2","expected":[200,"abc"],"passed":false},{"actual":[416,""],"check":"range-unsupported-unit-ignore fixture 3","expected":[200,"abc"],"passed":false},{"actual":[206,""],"check":"range-unsupported-unit-ignore fixture 4","expected":[206,""],"passed":true},{"actual":[416,""],"check":"range-unsupported-unit-ignore fixture 5","expected":[200,""],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"range-unsupported-unit-ignore fixture 0\", \"actual\": [416, \"\"], \"expected\": [200, \"f\"], \"passed\": false}, {\"check\": \"range-unsupported-unit-ignore fixture 1\", \"actual\": [206, \"p\"], \"expected\": [206, \"p\"], \"passed\": true}, {\"check\": \"range-unsupported-unit-ignore fixture 2\", \"actual\": [416, \"\"], \"expected\": [200, \"abc\"], \"passed\": false}, {\"check\": \"range-unsupported-unit-ignore fixture 3\", \"actual\": [416, \"\"], \"expected\": [200, \"abc\"], \"passed\": false}, {\"check\": \"range-unsupported-unit-ignore fixture 4\", \"actual\": [206, \"\"], \"expected\": [206, \"\"], \"passed\": true}, {\"check\": \"range-unsupported-unit-ignore fixture 5\", \"actual\": [416, \"\"], \"expected\": [200, \"\"], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":36.949,"exit_code":1,"observations":[{"actual":[206,"p"],"check":"range-unsupported-unit-ignore fixture 0","expected":[200,"f"],"passed":false},{"actual":[206,"p"],"check":"range-unsupported-unit-ignore fixture 1","expected":[206,"p"],"passed":true},{"actual":[206,"b"],"check":"range-unsupported-unit-ignore fixture 2","expected":[200,"abc"],"passed":false},{"actual":[206,"b"],"check":"range-unsupported-unit-ignore fixture 3","expected":[200,"abc"],"passed":false},{"actual":[206,""],"check":"range-unsupported-unit-ignore fixture 4","expected":[206,""],"passed":true},{"actual":[206,""],"check":"range-unsupported-unit-ignore fixture 5","expected":[200,""],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"range-unsupported-unit-ignore fixture 0\", \"actual\": [206, \"p\"], \"expected\": [200, \"f\"], \"passed\": false}, {\"check\": \"range-unsupported-unit-ignore fixture 1\", \"actual\": [206, \"p\"], \"expected\": [206, \"p\"], \"passed\": true}, {\"check\": \"range-unsupported-unit-ignore fixture 2\", \"actual\": [206, \"b\"], \"expected\": [200, \"abc\"], \"passed\": false}, {\"check\": \"range-unsupported-unit-ignore fixture 3\", \"actual\": [206, \"b\"], \"expected\": [200, \"abc\"], \"passed\": false}, {\"check\": \"range-unsupported-unit-ignore fixture 4\", \"actual\": [206, \"\"], \"expected\": [206, \"\"], \"passed\": true}, {\"check\": \"range-unsupported-unit-ignore fixture 5\", \"actual\": [206, \"\"], \"expected\": [200, \"\"], \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":38.971,"exit_code":0,"observations":[{"actual":[200,"f"],"check":"range-unsupported-unit-ignore fixture 0","expected":[200,"f"],"passed":true},{"actual":[206,"p"],"check":"range-unsupported-unit-ignore fixture 1","expected":[206,"p"],"passed":true},{"actual":[200,"abc"],"check":"range-unsupported-unit-ignore fixture 2","expected":[200,"abc"],"passed":true},{"actual":[200,"abc"],"check":"range-unsupported-unit-ignore fixture 3","expected":[200,"abc"],"passed":true},{"actual":[206,""],"check":"range-unsupported-unit-ignore fixture 4","expected":[206,""],"passed":true},{"actual":[200,""],"check":"range-unsupported-unit-ignore fixture 5","expected":[200,""],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"range-unsupported-unit-ignore fixture 0\", \"actual\": [200, \"f\"], \"expected\": [200, \"f\"], \"passed\": true}, {\"check\": \"range-unsupported-unit-ignore fixture 1\", \"actual\": [206, \"p\"], \"expected\": [206, \"p\"], \"passed\": true}, {\"check\": \"range-unsupported-unit-ignore fixture 2\", \"actual\": [200, \"abc\"], \"expected\": [200, \"abc\"], \"passed\": true}, {\"check\": \"range-unsupported-unit-ignore fixture 3\", \"actual\": [200, \"abc\"], \"expected\": [200, \"abc\"], \"passed\": true}, {\"check\": \"range-unsupported-unit-ignore fixture 4\", \"actual\": [206, \"\"], \"expected\": [206, \"\"], \"passed\": true}, {\"check\": \"range-unsupported-unit-ignore fixture 5\", \"actual\": [200, \"\"], \"expected\": [200, \"\"], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}