{"abstract":"CRLF normalization creates duplicate newlines.","category":"Text processing","checks":4,"contract":"Normalize CRLF and lone CR to LF, preserving all other code points.","contract_signature":"x","evaluation_group":"model-188acf2abf424b33","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-token-crlf-normalization","id":"FA-3786","implementations":{"attempt":{"sha256":"4cb45e915c1832ffd41a88ad43e445b4de3da17f093fe907a56b934846c60f39","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.replace('\\r\\n','\\n')\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\\nb')\ncheck('boundary 2', solve('a\\rb'), 'a\\nb')\ncheck('boundary 3', solve('a\\n'), 'a\\n')\ncheck('boundary 4', solve('\\u2028'), '\\u2028')\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":"9d5560f352375ad3f2755884c46e883df4ca26e49b1bfba58eb5e66722ad5bb8","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.replace('\\r','\\n')\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\\nb')\ncheck('boundary 2', solve('a\\rb'), 'a\\nb')\ncheck('boundary 3', solve('a\\n'), 'a\\n')\ncheck('boundary 4', solve('\\u2028'), '\\u2028')\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-token-crlf-normalization","generated_at":"2026-09-29T14:37:30.968113+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: Normalize CRLF and lone CR to LF, preserving all other code points.","sha256":"7810b77344c5e54f300859676bbe62b75e64ef4670ac0f4c58de4fbb6572a31b","title":"CRLF normalization creates duplicate newlines · 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":53.926,"exit_code":1,"observations":[{"actual":"a\nb","check":"boundary 1","expected":"a\nb","passed":true},{"actual":"a\rb","check":"boundary 2","expected":"a\nb","passed":false},{"actual":"a\n","check":"boundary 3","expected":"a\n","passed":true},{"actual":"
","check":"boundary 4","expected":"
","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"a\\nb\", \"expected\": \"a\\nb\", \"passed\": true}, {\"check\": \"boundary 2\", \"actual\": \"a\\rb\", \"expected\": \"a\\nb\", \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": \"a\\n\", \"expected\": \"a\\n\", \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": \"
\", \"expected\": \"
\", \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":53.489,"exit_code":1,"observations":[{"actual":"a\n\nb","check":"boundary 1","expected":"a\nb","passed":false},{"actual":"a\nb","check":"boundary 2","expected":"a\nb","passed":true},{"actual":"a\n","check":"boundary 3","expected":"a\n","passed":true},{"actual":"
","check":"boundary 4","expected":"
","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"a\\n\\nb\", \"expected\": \"a\\nb\", \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": \"a\\nb\", \"expected\": \"a\\nb\", \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": \"a\\n\", \"expected\": \"a\\n\", \"passed\": true}, {\"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."}}