{"abstract":"Byte-range numbers reject non-ASCII decimal lookalikes.","category":"HTTP ranges","checks":6,"contract":"Return integer for nonempty ASCII decimal digits only; otherwise None. This field parser does not accept signs or Unicode digit characters.","contract_signature":"digits","evaluation_group":"s3-http_ranges-request-fields","failed_approach":"The partial repair uses return int(digits) if digits and all(c.isdigit() for c in digits) and all(c not in \"²³¹\" for c in digits) else None, which still violates the stated contract.","family":"s3-http_ranges-range-decimal-ascii-only","id":"FA-26651","implementations":{"attempt":{"sha256":"a0d6c8b457b23a360a91ec555948624c4e9677fb9d6324d238dd9d33e367279a","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(digits):\n    return int(digits) if digits and all(c.isdigit() for c in digits) and all(c not in \"²³¹\" for c in digits) else None\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('range-decimal-ascii-only fixture 0', solve(\"١\"*N), None)\ncheck('range-decimal-ascii-only fixture 1', solve(\"１\"), None)\ncheck('range-decimal-ascii-only fixture 2', solve(str(N)), N)\ncheck('range-decimal-ascii-only fixture 3', solve(\"000\"), 0)\ncheck('range-decimal-ascii-only fixture 4', solve(\"\"), None)\ncheck('range-decimal-ascii-only fixture 5', solve(\"-1\"), None)\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":"f0a37fd4532257a52bb205f007f89c274b14947f9628f5bc8171b233c9c587e4","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(digits):\n    return int(digits) if digits and digits.isdecimal() else None\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('range-decimal-ascii-only fixture 0', solve(\"١\"*N), None)\ncheck('range-decimal-ascii-only fixture 1', solve(\"１\"), None)\ncheck('range-decimal-ascii-only fixture 2', solve(str(N)), N)\ncheck('range-decimal-ascii-only fixture 3', solve(\"000\"), 0)\ncheck('range-decimal-ascii-only fixture 4', solve(\"\"), None)\ncheck('range-decimal-ascii-only fixture 5', solve(\"-1\"), None)\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-decimal-ascii-only","generated_at":"2026-09-29T14:41:17.954734+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-decimal-ascii-only decision uses return int(digits) if digits and digits.isdecimal() else None.","sha256":"7aafb53386031c8dbe5f61542e52ab407efb98b658d2e6d362e2165360b17a89","title":"Byte-range numbers reject non-ASCII decimal lookalikes · 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":37.031,"exit_code":1,"observations":[{"actual":1,"check":"range-decimal-ascii-only fixture 0","expected":null,"passed":false},{"actual":1,"check":"range-decimal-ascii-only fixture 1","expected":null,"passed":false},{"actual":1,"check":"range-decimal-ascii-only fixture 2","expected":1,"passed":true},{"actual":0,"check":"range-decimal-ascii-only fixture 3","expected":0,"passed":true},{"actual":null,"check":"range-decimal-ascii-only fixture 4","expected":null,"passed":true},{"actual":null,"check":"range-decimal-ascii-only fixture 5","expected":null,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"range-decimal-ascii-only fixture 0\", \"actual\": 1, \"expected\": null, \"passed\": false}, {\"check\": \"range-decimal-ascii-only fixture 1\", \"actual\": 1, \"expected\": null, \"passed\": false}, {\"check\": \"range-decimal-ascii-only fixture 2\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"range-decimal-ascii-only fixture 3\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"range-decimal-ascii-only fixture 4\", \"actual\": null, \"expected\": null, \"passed\": true}, {\"check\": \"range-decimal-ascii-only fixture 5\", \"actual\": null, \"expected\": null, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":38.717,"exit_code":1,"observations":[{"actual":1,"check":"range-decimal-ascii-only fixture 0","expected":null,"passed":false},{"actual":1,"check":"range-decimal-ascii-only fixture 1","expected":null,"passed":false},{"actual":1,"check":"range-decimal-ascii-only fixture 2","expected":1,"passed":true},{"actual":0,"check":"range-decimal-ascii-only fixture 3","expected":0,"passed":true},{"actual":null,"check":"range-decimal-ascii-only fixture 4","expected":null,"passed":true},{"actual":null,"check":"range-decimal-ascii-only fixture 5","expected":null,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"range-decimal-ascii-only fixture 0\", \"actual\": 1, \"expected\": null, \"passed\": false}, {\"check\": \"range-decimal-ascii-only fixture 1\", \"actual\": 1, \"expected\": null, \"passed\": false}, {\"check\": \"range-decimal-ascii-only fixture 2\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"range-decimal-ascii-only fixture 3\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"range-decimal-ascii-only fixture 4\", \"actual\": null, \"expected\": null, \"passed\": true}, {\"check\": \"range-decimal-ascii-only fixture 5\", \"actual\": null, \"expected\": null, \"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."}}