{"abstract":"Paragraph splitting counts each blank line separately.","category":"Text processing","checks":4,"contract":"Split LF text at one or more whitespace-only blank lines; trim LF at ends and preserve line content.","evaluation_group":"model-ef64b7a695281462","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-paragraph-blank-lines","id":"FA-3796","implementations":{"attempt":{"sha256":"7402ff21c7decf92085b6f76c9a28e84c4adc3b21d40c34e348d599161a758c0","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.split(r'\\n\\n+',x.strip('\\n')) if x.strip('\\n') else []\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\\n \\nb'), ['a', 'b'])\ncheck('boundary 2', solve('a\\n\\n\\nb'), ['a', 'b'])\ncheck('boundary 3', solve('a\\nb'), ['a\\nb'])\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":"1a664cf807ead154bc29146a0f03a897b5ee949692d00da8ba4307d9346c6a3e","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.split('\\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\\n \\nb'), ['a', 'b'])\ncheck('boundary 2', solve('a\\n\\n\\nb'), ['a', 'b'])\ncheck('boundary 3', solve('a\\nb'), ['a\\nb'])\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"},"fixed":{"sha256":"d5f96f92792102a419350ace21c0634f332f93fdc25214a472b56b7598eb9951","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.split(r'\\n[ \\x09]*\\n(?:[ \\x09]*\\n)*',x.strip('\\n')) if x.strip('\\n') else []\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\\n \\nb'), ['a', 'b'])\ncheck('boundary 2', solve('a\\n\\n\\nb'), ['a', 'b'])\ncheck('boundary 3', solve('a\\nb'), ['a\\nb'])\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-paragraph-blank-lines","generated_at":"2026-09-29T14:37:31.156083+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: Split LF text at one or more whitespace-only blank lines; trim LF at ends and preserve line content.","root_cause":"The implementation applies an operation whose text or grammar semantics violate this contract: Split LF text at one or more whitespace-only blank lines; trim LF at ends and preserve line content.","sha256":"8a981beb964b56bd10dae17c28739832e75879cb38956189873d1fc71475d15a","title":"Paragraph splitting counts each blank line separately · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":59.354,"exit_code":1,"observations":[{"actual":["a\n \nb"],"check":"boundary 1","expected":["a","b"],"passed":false},{"actual":["a","b"],"check":"boundary 2","expected":["a","b"],"passed":true},{"actual":["a\nb"],"check":"boundary 3","expected":["a\nb"],"passed":true},{"actual":[],"check":"boundary 4","expected":[],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [\"a\\n \\nb\"], \"expected\": [\"a\", \"b\"], \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": [\"a\", \"b\"], \"expected\": [\"a\", \"b\"], \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": [\"a\\nb\"], \"expected\": [\"a\\nb\"], \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": [], \"expected\": [], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":54.825,"exit_code":1,"observations":[{"actual":["a\n \nb"],"check":"boundary 1","expected":["a","b"],"passed":false},{"actual":["a","\nb"],"check":"boundary 2","expected":["a","b"],"passed":false},{"actual":["a\nb"],"check":"boundary 3","expected":["a\nb"],"passed":true},{"actual":[""],"check":"boundary 4","expected":[],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [\"a\\n \\nb\"], \"expected\": [\"a\", \"b\"], \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": [\"a\", \"\\nb\"], \"expected\": [\"a\", \"b\"], \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": [\"a\\nb\"], \"expected\": [\"a\\nb\"], \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": [\"\"], \"expected\": [], \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":123.996,"exit_code":0,"observations":[{"actual":["a","b"],"check":"boundary 1","expected":["a","b"],"passed":true},{"actual":["a","b"],"check":"boundary 2","expected":["a","b"],"passed":true},{"actual":["a\nb"],"check":"boundary 3","expected":["a\nb"],"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\": [\"a\", \"b\"], \"expected\": [\"a\", \"b\"], \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": [\"a\\nb\"], \"expected\": [\"a\\nb\"], \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": [], \"expected\": [], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}