{"abstract":"Fullwidth letters occupy one display column.","category":"Unicode","checks":4,"contract":"Sum width 2 for W/F, zero for combining marks, and 1 otherwise; this is a codepoint width model.","contract_signature":"x","evaluation_group":"model-817c4afff23a685d","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-east-asian-width","id":"FA-2931","implementations":{"attempt":{"sha256":"a791b99ea1765488bdd22e36d2cf2a4e4f17432a0b677c774122f976169e2517","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 sum(2 if unicodedata.east_asian_width(c) in 'WF' else 1 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中'), 4)\ncheck('boundary 2', solve('é'), 1)\ncheck('boundary 3', solve('abc'), 3)\ncheck('boundary 4', solve(''), 0)\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":"f5a8a9b6580a7a85dd4fcee22fbebdea584108e1f4fae7e4adbdcbf97418c0dc","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 len(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中'), 4)\ncheck('boundary 2', solve('é'), 1)\ncheck('boundary 3', solve('abc'), 3)\ncheck('boundary 4', solve(''), 0)\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-east-asian-width","generated_at":"2026-09-29T14:37:18.867786+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: Sum width 2 for W/F, zero for combining marks, and 1 otherwise; this is a codepoint width model.","sha256":"1b59bb1eeb9ad7b29f995d04846e060bedb1cf68056792859c7acad7ecfbcf92","title":"Fullwidth letters occupy one display column · 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":54.519,"exit_code":1,"observations":[{"actual":4,"check":"boundary 1","expected":4,"passed":true},{"actual":2,"check":"boundary 2","expected":1,"passed":false},{"actual":3,"check":"boundary 3","expected":3,"passed":true},{"actual":0,"check":"boundary 4","expected":0,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": 4, \"expected\": 4, \"passed\": true}, {\"check\": \"boundary 2\", \"actual\": 2, \"expected\": 1, \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": 3, \"expected\": 3, \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": 0, \"expected\": 0, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":55.339,"exit_code":1,"observations":[{"actual":2,"check":"boundary 1","expected":4,"passed":false},{"actual":2,"check":"boundary 2","expected":1,"passed":false},{"actual":3,"check":"boundary 3","expected":3,"passed":true},{"actual":0,"check":"boundary 4","expected":0,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": 2, \"expected\": 4, \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": 2, \"expected\": 1, \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": 3, \"expected\": 3, \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": 0, \"expected\": 0, \"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."}}