{"abstract":"A two-character operator is split into single tokens.","category":"Tokenization","checks":4,"contract":"Tokenize only <, <=, >, >=, = and == using maximal munch; spaces ignored.","contract_signature":"x","evaluation_group":"model-c4c3773641a4566d","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-operator-maximal-munch","id":"FA-3761","implementations":{"attempt":{"sha256":"ad7b7c392aaa17ef4ed7ef85b96cd0c6f3f71616e3dd249b3df0c9dd7bf714d4","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 re.findall(r'[<>=]|<=|>=|==',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'), ['<='])\ncheck('boundary 2', solve('== >='), ['==', '>='])\ncheck('boundary 3', solve('< ='), ['<', '='])\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":"38625f0e2099058d0aab71a2a8f741be0f83f6883e5197b72d90f7d19701217b","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 list(x.replace(' ',''))\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'), ['<='])\ncheck('boundary 2', solve('== >='), ['==', '>='])\ncheck('boundary 3', solve('< ='), ['<', '='])\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-operator-maximal-munch","generated_at":"2026-09-29T14:37:30.398343+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: Tokenize only <, <=, >, >=, = and == using maximal munch; spaces ignored.","sha256":"fb18e77d0fe7cc865d39a5967b01b6c2090a5b0a530a514d5ec43e9bc35ce291","title":"A two-character operator is split into single tokens · 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":50.554,"exit_code":1,"observations":[{"actual":["<","="],"check":"boundary 1","expected":["<="],"passed":false},{"actual":["=","=",">","="],"check":"boundary 2","expected":["==",">="],"passed":false},{"actual":["<","="],"check":"boundary 3","expected":["<","="],"passed":true},{"actual":[],"check":"boundary 4","expected":[],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [\"<\", \"=\"], \"expected\": [\"<=\"], \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": [\"=\", \"=\", \">\", \"=\"], \"expected\": [\"==\", \">=\"], \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": [\"<\", \"=\"], \"expected\": [\"<\", \"=\"], \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": [], \"expected\": [], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":56.32,"exit_code":1,"observations":[{"actual":["a","<","=","b"],"check":"boundary 1","expected":["<="],"passed":false},{"actual":["=","=",">","="],"check":"boundary 2","expected":["==",">="],"passed":false},{"actual":["<","="],"check":"boundary 3","expected":["<","="],"passed":true},{"actual":[],"check":"boundary 4","expected":[],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [\"a\", \"<\", \"=\", \"b\"], \"expected\": [\"<=\"], \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": [\"=\", \"=\", \">\", \"=\"], \"expected\": [\"==\", \">=\"], \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": [\"<\", \"=\"], \"expected\": [\"<\", \"=\"], \"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."}}