{"abstract":"Line terminators lose their original spelling.","category":"Text processing","checks":4,"contract":"Split lines retaining complete CRLF and all other recognized terminators.","contract_signature":"x","evaluation_group":"model-abd3e872872d1753","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-splitlines-keepends","id":"FA-3011","implementations":{"attempt":{"sha256":"0453b36bcc1aa694a13ca803eb645e087af4d2df0c3c367baed2bc9a7e3feb76","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.splitlines()\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\\r\\nb'), ['a\\r\\n', 'b'])\ncheck('boundary 2', solve('a\\n'), ['a\\n'])\ncheck('boundary 3', solve('a\\u2028b'), ['a\\u2028', 'b'])\ncheck('boundary 4', solve(''), [])\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":"db2681556369ac772b30ed6d0a16310c938a9c09e16fd479a8948c6a5b8cff30","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+'\\n' for v in x.splitlines()]\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\\r\\nb'), ['a\\r\\n', 'b'])\ncheck('boundary 2', solve('a\\n'), ['a\\n'])\ncheck('boundary 3', solve('a\\u2028b'), ['a\\u2028', 'b'])\ncheck('boundary 4', solve(''), [])\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-splitlines-keepends","generated_at":"2026-09-29T14:37:20.407002+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: Split lines retaining complete CRLF and all other recognized terminators.","sha256":"c6a9949d4d873610fe42ee4a2897ddfff1a238f8ab38f618657f45f6d368d04d","title":"Line terminators lose their original spelling · 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":56.844,"exit_code":1,"observations":[{"actual":["a","b"],"check":"boundary 1","expected":["a\r\n","b"],"passed":false},{"actual":["a"],"check":"boundary 2","expected":["a\n"],"passed":false},{"actual":["a","b"],"check":"boundary 3","expected":["a
","b"],"passed":false},{"actual":[],"check":"boundary 4","expected":[],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [\"a\", \"b\"], \"expected\": [\"a\\r\\n\", \"b\"], \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": [\"a\"], \"expected\": [\"a\\n\"], \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": [\"a\", \"b\"], \"expected\": [\"a
\", \"b\"], \"passed\": false}, {\"check\": \"boundary 4\", \"actual\": [], \"expected\": [], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":109.854,"exit_code":1,"observations":[{"actual":["a\n","b\n"],"check":"boundary 1","expected":["a\r\n","b"],"passed":false},{"actual":["a\n"],"check":"boundary 2","expected":["a\n"],"passed":true},{"actual":["a\n","b\n"],"check":"boundary 3","expected":["a
","b"],"passed":false},{"actual":[],"check":"boundary 4","expected":[],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [\"a\\n\", \"b\\n\"], \"expected\": [\"a\\r\\n\", \"b\"], \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": [\"a\\n\"], \"expected\": [\"a\\n\"], \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": [\"a\\n\", \"b\\n\"], \"expected\": [\"a
\", \"b\"], \"passed\": false}, {\"check\": \"boundary 4\", \"actual\": [], \"expected\": [], \"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."}}