{"abstract":"A comma inside a quoted CSV cell becomes a separator.","category":"Delimited text","checks":4,"contract":"Read one CSV row using standard double-quote escaping and preserve empty fields.","contract_signature":"x","evaluation_group":"model-e1a26fbbe097d69e","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-csv-quoted-comma","id":"FA-3186","implementations":{"attempt":{"sha256":"9936b3614588f8a26d0fee451cd225a4afbdace4cd2aef365e4ae87a3bd0db78","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport re, unicodedata, json, csv, io, html, base64, binascii, codecs, struct\nfrom urllib.parse import quote, unquote, unquote_to_bytes, urlencode, parse_qsl, urlsplit, urlunsplit\nfrom email.header import decode_header, make_header\nfrom email.utils import getaddresses\nfrom xml.etree import ElementTree as ET\nimport shlex, string, textwrap\n\nN = 1\nobservations = []\ndef solve(x):\n    try:\n        return [v.strip('\"') for v in x.split(',')]\n    except Exception as exc:\n        return {\"error\": type(exc).__name__}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('boundary 1', solve('\"a,b\",c'), ['a,b', 'c'])\ncheck('boundary 2', solve('\"a\"\"b\",x'), ['a\"b', 'x'])\ncheck('boundary 3', solve('a,,'), ['a', '', ''])\ncheck('boundary 4', solve('x'), ['x'])\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":"e1def41db32aefcfce1dc12f895aa44081d741e38aad9c4eb85c714aa2737116","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport re, unicodedata, json, csv, io, html, base64, binascii, codecs, struct\nfrom urllib.parse import quote, unquote, unquote_to_bytes, urlencode, parse_qsl, urlsplit, urlunsplit\nfrom email.header import decode_header, make_header\nfrom email.utils import getaddresses\nfrom xml.etree import ElementTree as ET\nimport shlex, string, textwrap\n\nN = 1\nobservations = []\ndef solve(x):\n    try:\n        return x.split(',')\n    except Exception as exc:\n        return {\"error\": type(exc).__name__}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('boundary 1', solve('\"a,b\",c'), ['a,b', 'c'])\ncheck('boundary 2', solve('\"a\"\"b\",x'), ['a\"b', 'x'])\ncheck('boundary 3', solve('a,,'), ['a', '', ''])\ncheck('boundary 4', solve('x'), ['x'])\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":" 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":"xp-csv-quoted-comma","generated_at":"2026-09-29T14:37:22.490945+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"A local executable model for consumers of structured text; oracle values are authored literals, not outputs copied from the repaired implementation.","root_cause":"The implementation applies an operation whose text or grammar semantics violate this contract: Read one CSV row using standard double-quote escaping and preserve empty fields.","sha256":"7d5b9143d77625351ab6a45bb8b08b28e41e2aacd593b675913591e9164c8682","title":"A comma inside a quoted CSV cell becomes a separator · 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":56.002,"exit_code":1,"observations":[{"actual":["a","b","c"],"check":"boundary 1","expected":["a,b","c"],"passed":false},{"actual":["a\"\"b","x"],"check":"boundary 2","expected":["a\"b","x"],"passed":false},{"actual":["a","",""],"check":"boundary 3","expected":["a","",""],"passed":true},{"actual":["x"],"check":"boundary 4","expected":["x"],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [\"a\", \"b\", \"c\"], \"expected\": [\"a,b\", \"c\"], \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": [\"a\\\"\\\"b\", \"x\"], \"expected\": [\"a\\\"b\", \"x\"], \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": [\"a\", \"\", \"\"], \"expected\": [\"a\", \"\", \"\"], \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": [\"x\"], \"expected\": [\"x\"], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":57.574,"exit_code":1,"observations":[{"actual":["\"a","b\"","c"],"check":"boundary 1","expected":["a,b","c"],"passed":false},{"actual":["\"a\"\"b\"","x"],"check":"boundary 2","expected":["a\"b","x"],"passed":false},{"actual":["a","",""],"check":"boundary 3","expected":["a","",""],"passed":true},{"actual":["x"],"check":"boundary 4","expected":["x"],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [\"\\\"a\", \"b\\\"\", \"c\"], \"expected\": [\"a,b\", \"c\"], \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": [\"\\\"a\\\"\\\"b\\\"\", \"x\"], \"expected\": [\"a\\\"b\", \"x\"], \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": [\"a\", \"\", \"\"], \"expected\": [\"a\", \"\", \"\"], \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": [\"x\"], \"expected\": [\"x\"], \"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."}}