{"abstract":"Pointer token escaping recursively escapes inserted text.","category":"Serialization","checks":4,"contract":"Encode a JSON Pointer token by escaping tilde before slash.","evaluation_group":"model-157e9a9583b4abc2","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-json-pointer-token-encode","id":"FA-3181","implementations":{"attempt":{"sha256":"8b1f5823bea4955ecd15395c8e2b1928f7e33957e7e5dc44aa849f114ad0f29a","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.replace('/','~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/b'), 'a~1b')\ncheck('boundary 2', solve('~1'), '~01')\ncheck('boundary 3', solve('~/'), '~0~1')\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":"4d8a7f03c70dc28fb7d4690070fca10e8f2e60fd7663227e38755b032fe74a1f","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.replace('/','~1').replace('~','~0')\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~1b')\ncheck('boundary 2', solve('~1'), '~01')\ncheck('boundary 3', solve('~/'), '~0~1')\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":"c2f6f008aad497cea7651a7544f60f488d47f6775d51ff66d8257ddfeb631092","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.replace('~','~0').replace('/','~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/b'), 'a~1b')\ncheck('boundary 2', solve('~1'), '~01')\ncheck('boundary 3', solve('~/'), '~0~1')\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-json-pointer-token-encode","generated_at":"2026-09-29T14:37:22.493472+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: Encode a JSON Pointer token by escaping tilde before slash.","root_cause":"The implementation applies an operation whose text or grammar semantics violate this contract: Encode a JSON Pointer token by escaping tilde before slash.","sha256":"c6931a2ba8badafad70e7289ebc3e4f76417583879745d898101c259c7833a9c","title":"Pointer token escaping recursively escapes inserted text · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":57.675,"exit_code":1,"observations":[{"actual":"a~1b","check":"boundary 1","expected":"a~1b","passed":true},{"actual":"~1","check":"boundary 2","expected":"~01","passed":false},{"actual":"~~1","check":"boundary 3","expected":"~0~1","passed":false},{"actual":"","check":"boundary 4","expected":"","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"a~1b\", \"expected\": \"a~1b\", \"passed\": true}, {\"check\": \"boundary 2\", \"actual\": \"~1\", \"expected\": \"~01\", \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": \"~~1\", \"expected\": \"~0~1\", \"passed\": false}, {\"check\": \"boundary 4\", \"actual\": \"\", \"expected\": \"\", \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":58.19,"exit_code":1,"observations":[{"actual":"a~01b","check":"boundary 1","expected":"a~1b","passed":false},{"actual":"~01","check":"boundary 2","expected":"~01","passed":true},{"actual":"~0~01","check":"boundary 3","expected":"~0~1","passed":false},{"actual":"","check":"boundary 4","expected":"","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"a~01b\", \"expected\": \"a~1b\", \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": \"~01\", \"expected\": \"~01\", \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": \"~0~01\", \"expected\": \"~0~1\", \"passed\": false}, {\"check\": \"boundary 4\", \"actual\": \"\", \"expected\": \"\", \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":56.008,"exit_code":0,"observations":[{"actual":"a~1b","check":"boundary 1","expected":"a~1b","passed":true},{"actual":"~01","check":"boundary 2","expected":"~01","passed":true},{"actual":"~0~1","check":"boundary 3","expected":"~0~1","passed":true},{"actual":"","check":"boundary 4","expected":"","passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"a~1b\", \"expected\": \"a~1b\", \"passed\": true}, {\"check\": \"boundary 2\", \"actual\": \"~01\", \"expected\": \"~01\", \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": \"~0~1\", \"expected\": \"~0~1\", \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": \"\", \"expected\": \"\", \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}