{"abstract":"One tag match consumes neighboring tags.","category":"Regular expressions","checks":4,"contract":"Extract each nonnested angle-bracket body; fixtures contain no brackets inside a body.","evaluation_group":"model-9bd92d3734c28809","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-regex-greedy-tags","id":"FA-3091","implementations":{"attempt":{"sha256":"e7fd761d24009a506eabf15603598961d9031f7b1ef3cb4b34b74780d4157fbb","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>'), ['a', 'b'])\ncheck('boundary 2', solve('<>'), [''])\ncheck('boundary 3', solve('x<c>y'), ['c'])\ncheck('boundary 4', solve('none'), [])\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":"a5db4766c1225657a4d0b834459b24b8011ffd86587e653e86228c20d13393df","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>'), ['a', 'b'])\ncheck('boundary 2', solve('<>'), [''])\ncheck('boundary 3', solve('x<c>y'), ['c'])\ncheck('boundary 4', solve('none'), [])\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"},"fixed":{"sha256":"ca3c940a184a0656d50ca548d762dc710c7d1d9a81ea916251f0d1993fca5868","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>'), ['a', 'b'])\ncheck('boundary 2', solve('<>'), [''])\ncheck('boundary 3', solve('x<c>y'), ['c'])\ncheck('boundary 4', solve('none'), [])\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-regex-greedy-tags","generated_at":"2026-09-29T14:37:21.351509+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.","repair":"Implement the complete stated contract, including the boundary fixtures: Extract each nonnested angle-bracket body; fixtures contain no brackets inside a body.","root_cause":"The implementation applies an operation whose text or grammar semantics violate this contract: Extract each nonnested angle-bracket body; fixtures contain no brackets inside a body.","sha256":"2431c1baef3e06644b5afe65d4b94505e4edb50383cd50b92189f7f6c2f1522c","title":"One tag match consumes neighboring tags · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":59.471,"exit_code":1,"observations":[{"actual":["a","b"],"check":"boundary 1","expected":["a","b"],"passed":true},{"actual":[],"check":"boundary 2","expected":[""],"passed":false},{"actual":["c"],"check":"boundary 3","expected":["c"],"passed":true},{"actual":[],"check":"boundary 4","expected":[],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [\"a\", \"b\"], \"expected\": [\"a\", \"b\"], \"passed\": true}, {\"check\": \"boundary 2\", \"actual\": [], \"expected\": [\"\"], \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": [\"c\"], \"expected\": [\"c\"], \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": [], \"expected\": [], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":54.746,"exit_code":1,"observations":[{"actual":["a><b"],"check":"boundary 1","expected":["a","b"],"passed":false},{"actual":[""],"check":"boundary 2","expected":[""],"passed":true},{"actual":["c"],"check":"boundary 3","expected":["c"],"passed":true},{"actual":[],"check":"boundary 4","expected":[],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [\"a><b\"], \"expected\": [\"a\", \"b\"], \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": [\"\"], \"expected\": [\"\"], \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": [\"c\"], \"expected\": [\"c\"], \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": [], \"expected\": [], \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":60.185,"exit_code":0,"observations":[{"actual":["a","b"],"check":"boundary 1","expected":["a","b"],"passed":true},{"actual":[""],"check":"boundary 2","expected":[""],"passed":true},{"actual":["c"],"check":"boundary 3","expected":["c"],"passed":true},{"actual":[],"check":"boundary 4","expected":[],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [\"a\", \"b\"], \"expected\": [\"a\", \"b\"], \"passed\": true}, {\"check\": \"boundary 2\", \"actual\": [\"\"], \"expected\": [\"\"], \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": [\"c\"], \"expected\": [\"c\"], \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": [], \"expected\": [], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}