{"abstract":"Markdown escaping modifies alphanumeric text.","category":"Markup","checks":4,"contract":"Backslash-escape ASCII punctuation only; leave letters, whitespace and non-ASCII characters literal.","contract_signature":"x","evaluation_group":"model-23f22026dbc0fac1","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-markdown-backslash-scope","id":"FA-4011","implementations":{"attempt":{"sha256":"8affa09fbace4d2796c773ac704bbef1ee305bbe2eb48eb85bcd28b65e925069","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 ''.join('\\\\'+c if not c.isalnum() else c for c in x)\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'), 'a\\\\*b')\ncheck('boundary 2', solve('a b'), 'a b')\ncheck('boundary 3', solve('é'), 'é')\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":"fdd88b33d922439ee00a1c2a6b2685a6a6a47782d19e4cdecf5bc39618898d9a","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 ''.join('\\\\'+c for c in x)\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'), 'a\\\\*b')\ncheck('boundary 2', solve('a b'), 'a b')\ncheck('boundary 3', solve('é'), 'é')\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-markdown-backslash-scope","generated_at":"2026-09-29T14:37:34.436225+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: Backslash-escape ASCII punctuation only; leave letters, whitespace and non-ASCII characters literal.","sha256":"8281756552f8b46dd971f362eccaa7d7ee90399d8abb86a23d158a8a40440266","title":"Markdown escaping modifies alphanumeric text · 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":52.648,"exit_code":1,"observations":[{"actual":"a\\*b","check":"boundary 1","expected":"a\\*b","passed":true},{"actual":"a\\ b","check":"boundary 2","expected":"a b","passed":false},{"actual":"é","check":"boundary 3","expected":"é","passed":true},{"actual":"\\[x\\]","check":"boundary 4","expected":"\\[x\\]","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"a\\\\*b\", \"expected\": \"a\\\\*b\", \"passed\": true}, {\"check\": \"boundary 2\", \"actual\": \"a\\\\ b\", \"expected\": \"a b\", \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": \"é\", \"expected\": \"é\", \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": \"\\\\[x\\\\]\", \"expected\": \"\\\\[x\\\\]\", \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":61.612,"exit_code":1,"observations":[{"actual":"\\a\\*\\b","check":"boundary 1","expected":"a\\*b","passed":false},{"actual":"\\a\\ \\b","check":"boundary 2","expected":"a b","passed":false},{"actual":"\\é","check":"boundary 3","expected":"é","passed":false},{"actual":"\\[\\x\\]","check":"boundary 4","expected":"\\[x\\]","passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"\\\\a\\\\*\\\\b\", \"expected\": \"a\\\\*b\", \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": \"\\\\a\\\\ \\\\b\", \"expected\": \"a b\", \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": \"\\\\é\", \"expected\": \"é\", \"passed\": false}, {\"check\": \"boundary 4\", \"actual\": \"\\\\[\\\\x\\\\]\", \"expected\": \"\\\\[x\\\\]\", \"passed\": false}], \"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."}}