{"abstract":"Column tracking does not reset after a newline.","category":"Parsing","checks":4,"contract":"Given text and a valid codepoint offset, return one-based line and zero-based column; newline itself belongs to preceding line.","evaluation_group":"model-a1119cfa4bd2fd41","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-token-line-column","id":"FA-3781","implementations":{"attempt":{"sha256":"b4e9835d9daf4f219706ec25fa5761fc547fc078f6d725030ef5c2dd1ca5b014","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[0][:x[1]].count('\\n')+1,x[1]]\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\\nbc', 3]), [2, 1])\ncheck('boundary 2', solve(['a\\nb', 1]), [1, 1])\ncheck('boundary 3', solve(['\\n', 1]), [2, 0])\ncheck('boundary 4', solve(['', 0]), [1, 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":"d89033c48f182b1239bda986eba9022e5e4b21661439c1d7b73849d523e01b22","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 [1,x[1]]\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\\nbc', 3]), [2, 1])\ncheck('boundary 2', solve(['a\\nb', 1]), [1, 1])\ncheck('boundary 3', solve(['\\n', 1]), [2, 0])\ncheck('boundary 4', solve(['', 0]), [1, 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"},"fixed":{"sha256":"78d3142a668ff71596d20f1ea493ea9e6e3c5ba7e80c876e61ecdc440e86005d","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[0][:x[1]].count('\\n')+1,x[1]-(x[0].rfind('\\n',0,x[1])+1)]\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\\nbc', 3]), [2, 1])\ncheck('boundary 2', solve(['a\\nb', 1]), [1, 1])\ncheck('boundary 3', solve(['\\n', 1]), [2, 0])\ncheck('boundary 4', solve(['', 0]), [1, 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-token-line-column","generated_at":"2026-09-29T14:37:30.807561+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: Given text and a valid codepoint offset, return one-based line and zero-based column; newline itself belongs to preceding line.","root_cause":"The implementation applies an operation whose text or grammar semantics violate this contract: Given text and a valid codepoint offset, return one-based line and zero-based column; newline itself belongs to preceding line.","sha256":"496e9d775773fb2d0a0eb81c128b2250d6b735532f0b405a01a74a0087e30665","title":"Column tracking does not reset after a newline · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":54.398,"exit_code":1,"observations":[{"actual":[2,3],"check":"boundary 1","expected":[2,1],"passed":false},{"actual":[1,1],"check":"boundary 2","expected":[1,1],"passed":true},{"actual":[2,1],"check":"boundary 3","expected":[2,0],"passed":false},{"actual":[1,0],"check":"boundary 4","expected":[1,0],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [2, 3], \"expected\": [2, 1], \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": [1, 1], \"expected\": [1, 1], \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": [2, 1], \"expected\": [2, 0], \"passed\": false}, {\"check\": \"boundary 4\", \"actual\": [1, 0], \"expected\": [1, 0], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":55.831,"exit_code":1,"observations":[{"actual":[1,3],"check":"boundary 1","expected":[2,1],"passed":false},{"actual":[1,1],"check":"boundary 2","expected":[1,1],"passed":true},{"actual":[1,1],"check":"boundary 3","expected":[2,0],"passed":false},{"actual":[1,0],"check":"boundary 4","expected":[1,0],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [1, 3], \"expected\": [2, 1], \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": [1, 1], \"expected\": [1, 1], \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": [1, 1], \"expected\": [2, 0], \"passed\": false}, {\"check\": \"boundary 4\", \"actual\": [1, 0], \"expected\": [1, 0], \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":137.22,"exit_code":0,"observations":[{"actual":[2,1],"check":"boundary 1","expected":[2,1],"passed":true},{"actual":[1,1],"check":"boundary 2","expected":[1,1],"passed":true},{"actual":[2,0],"check":"boundary 3","expected":[2,0],"passed":true},{"actual":[1,0],"check":"boundary 4","expected":[1,0],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": [2, 1], \"expected\": [2, 1], \"passed\": true}, {\"check\": \"boundary 2\", \"actual\": [1, 1], \"expected\": [1, 1], \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": [2, 0], \"expected\": [2, 0], \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": [1, 0], \"expected\": [1, 0], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}