{"abstract":"A blank line receives an unwanted prefix.","category":"Text processing","checks":4,"contract":"Prefix every nonblank line with > including its original indentation.","evaluation_group":"model-b6e4de184251abda","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-indent-blank-policy","id":"FA-3061","implementations":{"attempt":{"sha256":"f7f7b4701eea3b8f32ba81021fcf834e291ccbfeee2f0f06980913a3d0c733e4","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 '\\n'.join('>'+v if v else v for v in x.split('\\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\\n\\n>b')\ncheck('boundary 2', solve('a\\n  \\nb'), '>a\\n  \\n>b')\ncheck('boundary 3', solve('a\\n'), '>a\\n')\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":"23f3ae53e1e937080e040eec20eadc9bb8e0cc643ea87ac4a679a641c615ec64","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 '\\n'.join('>'+v for v in x.split('\\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\\n\\n>b')\ncheck('boundary 2', solve('a\\n  \\nb'), '>a\\n  \\n>b')\ncheck('boundary 3', solve('a\\n'), '>a\\n')\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":"fb02b8802af168cefb0c01a6067c40f25d288429ba6049811487c673d906b4bc","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 textwrap.indent(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\\n\\nb'), '>a\\n\\n>b')\ncheck('boundary 2', solve('a\\n  \\nb'), '>a\\n  \\n>b')\ncheck('boundary 3', solve('a\\n'), '>a\\n')\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-indent-blank-policy","generated_at":"2026-09-29T14:37:20.814483+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: Prefix every nonblank line with > including its original indentation.","root_cause":"The implementation applies an operation whose text or grammar semantics violate this contract: Prefix every nonblank line with > including its original indentation.","sha256":"beaadbc45ccb377806b0e599f7794e96a9ce77ebfc04ab088fba25d106801b7e","title":"A blank line receives an unwanted prefix · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":58.782,"exit_code":1,"observations":[{"actual":">a\n\n>b","check":"boundary 1","expected":">a\n\n>b","passed":true},{"actual":">a\n>  \n>b","check":"boundary 2","expected":">a\n  \n>b","passed":false},{"actual":">a\n","check":"boundary 3","expected":">a\n","passed":true},{"actual":"","check":"boundary 4","expected":"","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \">a\\n\\n>b\", \"expected\": \">a\\n\\n>b\", \"passed\": true}, {\"check\": \"boundary 2\", \"actual\": \">a\\n>  \\n>b\", \"expected\": \">a\\n  \\n>b\", \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": \">a\\n\", \"expected\": \">a\\n\", \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": \"\", \"expected\": \"\", \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":57.025,"exit_code":1,"observations":[{"actual":">a\n>\n>b","check":"boundary 1","expected":">a\n\n>b","passed":false},{"actual":">a\n>  \n>b","check":"boundary 2","expected":">a\n  \n>b","passed":false},{"actual":">a\n>","check":"boundary 3","expected":">a\n","passed":false},{"actual":">","check":"boundary 4","expected":"","passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \">a\\n>\\n>b\", \"expected\": \">a\\n\\n>b\", \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": \">a\\n>  \\n>b\", \"expected\": \">a\\n  \\n>b\", \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": \">a\\n>\", \"expected\": \">a\\n\", \"passed\": false}, {\"check\": \"boundary 4\", \"actual\": \">\", \"expected\": \"\", \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":60.68,"exit_code":0,"observations":[{"actual":">a\n\n>b","check":"boundary 1","expected":">a\n\n>b","passed":true},{"actual":">a\n  \n>b","check":"boundary 2","expected":">a\n  \n>b","passed":true},{"actual":">a\n","check":"boundary 3","expected":">a\n","passed":true},{"actual":"","check":"boundary 4","expected":"","passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \">a\\n\\n>b\", \"expected\": \">a\\n\\n>b\", \"passed\": true}, {\"check\": \"boundary 2\", \"actual\": \">a\\n  \\n>b\", \"expected\": \">a\\n  \\n>b\", \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": \">a\\n\", \"expected\": \">a\\n\", \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": \"\", \"expected\": \"\", \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}