{"abstract":"Subsecond storage timestamps do not spuriously invalidate second-granularity dates.","category":"HTTP ranges","checks":6,"contract":"For this local date condition compare floor(modified_ms/1000) to condition_s. Return [304,empty] if not newer, otherwise [206,body]. Nonnegative integer times.","contract_signature":"modified_ms, condition_s, body","evaluation_group":"s3-http_ranges-conditional","failed_approach":"The partial repair uses return [304, \"\"] if round(modified_ms/1000) <= condition_s else [206,body], which still violates the stated contract.","family":"s3-http_ranges-date-precision-normalization","id":"FA-26361","implementations":{"attempt":{"sha256":"bab70425a16c8d60c7103622eb45c15e84f87ca40502e2ad51df0cf63786a727","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(modified_ms, condition_s, body):\n    return [304, \"\"] if round(modified_ms/1000) <= condition_s else [206,body]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('date-precision-normalization fixture 0', solve(N*1000+900,N,\"p\"*N), [304,\"\"])\ncheck('date-precision-normalization fixture 1', solve(N*1000+1,N,\"p\"), [304,\"\"])\ncheck('date-precision-normalization fixture 2', solve(N*1000,N,\"p\"), [304,\"\"])\ncheck('date-precision-normalization fixture 3', solve((N+1)*1000,N,\"p\"*N), [206,\"p\"*N])\ncheck('date-precision-normalization fixture 4', solve(0,0,\"p\"), [304,\"\"])\ncheck('date-precision-normalization fixture 5', solve(0,N,\"p\"), [304,\"\"])\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":"d7deb676c040387e1489453d84f47c660bfc0b8032af137fc55cdf06c926b57e","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(modified_ms, condition_s, body):\n    return [304, \"\"] if modified_ms <= condition_s*1000 else [206,body]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('date-precision-normalization fixture 0', solve(N*1000+900,N,\"p\"*N), [304,\"\"])\ncheck('date-precision-normalization fixture 1', solve(N*1000+1,N,\"p\"), [304,\"\"])\ncheck('date-precision-normalization fixture 2', solve(N*1000,N,\"p\"), [304,\"\"])\ncheck('date-precision-normalization fixture 3', solve((N+1)*1000,N,\"p\"*N), [206,\"p\"*N])\ncheck('date-precision-normalization fixture 4', solve(0,0,\"p\"), [304,\"\"])\ncheck('date-precision-normalization fixture 5', solve(0,N,\"p\"), [304,\"\"])\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-date-precision-normalization","generated_at":"2026-09-29T14:41:15.315250+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 date-precision-normalization decision uses return [304, \"\"] if modified_ms <= condition_s*1000 else [206,body].","sha256":"4ff0d004c5b068ac6a21c460b1842ba9b50ecf426b97249a5d809e54defa84e0","title":"Subsecond storage timestamps do not spuriously invalidate second-granularity dates · 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":43.834,"exit_code":1,"observations":[{"actual":[206,"p"],"check":"date-precision-normalization fixture 0","expected":[304,""],"passed":false},{"actual":[304,""],"check":"date-precision-normalization fixture 1","expected":[304,""],"passed":true},{"actual":[304,""],"check":"date-precision-normalization fixture 2","expected":[304,""],"passed":true},{"actual":[206,"p"],"check":"date-precision-normalization fixture 3","expected":[206,"p"],"passed":true},{"actual":[304,""],"check":"date-precision-normalization fixture 4","expected":[304,""],"passed":true},{"actual":[304,""],"check":"date-precision-normalization fixture 5","expected":[304,""],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"date-precision-normalization fixture 0\", \"actual\": [206, \"p\"], \"expected\": [304, \"\"], \"passed\": false}, {\"check\": \"date-precision-normalization fixture 1\", \"actual\": [304, \"\"], \"expected\": [304, \"\"], \"passed\": true}, {\"check\": \"date-precision-normalization fixture 2\", \"actual\": [304, \"\"], \"expected\": [304, \"\"], \"passed\": true}, {\"check\": \"date-precision-normalization fixture 3\", \"actual\": [206, \"p\"], \"expected\": [206, \"p\"], \"passed\": true}, {\"check\": \"date-precision-normalization fixture 4\", \"actual\": [304, \"\"], \"expected\": [304, \"\"], \"passed\": true}, {\"check\": \"date-precision-normalization fixture 5\", \"actual\": [304, \"\"], \"expected\": [304, \"\"], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":37.429,"exit_code":1,"observations":[{"actual":[206,"p"],"check":"date-precision-normalization fixture 0","expected":[304,""],"passed":false},{"actual":[206,"p"],"check":"date-precision-normalization fixture 1","expected":[304,""],"passed":false},{"actual":[304,""],"check":"date-precision-normalization fixture 2","expected":[304,""],"passed":true},{"actual":[206,"p"],"check":"date-precision-normalization fixture 3","expected":[206,"p"],"passed":true},{"actual":[304,""],"check":"date-precision-normalization fixture 4","expected":[304,""],"passed":true},{"actual":[304,""],"check":"date-precision-normalization fixture 5","expected":[304,""],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"date-precision-normalization fixture 0\", \"actual\": [206, \"p\"], \"expected\": [304, \"\"], \"passed\": false}, {\"check\": \"date-precision-normalization fixture 1\", \"actual\": [206, \"p\"], \"expected\": [304, \"\"], \"passed\": false}, {\"check\": \"date-precision-normalization fixture 2\", \"actual\": [304, \"\"], \"expected\": [304, \"\"], \"passed\": true}, {\"check\": \"date-precision-normalization fixture 3\", \"actual\": [206, \"p\"], \"expected\": [206, \"p\"], \"passed\": true}, {\"check\": \"date-precision-normalization fixture 4\", \"actual\": [304, \"\"], \"expected\": [304, \"\"], \"passed\": true}, {\"check\": \"date-precision-normalization fixture 5\", \"actual\": [304, \"\"], \"expected\": [304, \"\"], \"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."}}