{"abstract":"Boolean values are serialized as numeric values.","category":"Serialization","checks":4,"contract":"Encode a JSON scalar preserving bool, null, integer and string distinctions.","contract_signature":"x","evaluation_group":"model-c16de4d8b18aea1b","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-json-boolean-kind","id":"FA-3146","implementations":{"attempt":{"sha256":"8f40cf9038a300359c675a72b7a0ecb49b4ff644054a59f313a754dbe3376bb9","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 json.dumps(int(x) if isinstance(x,int) else 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(True), 'true')\ncheck('boundary 2', solve(False), 'false')\ncheck('boundary 3', solve(None), 'null')\ncheck('boundary 4', solve(2), '2')\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":"b1c5e9a68974da0653ef0b812ac0dc8a21636039f25d9ae57fe90f4e8b3d3917","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 str(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(True), 'true')\ncheck('boundary 2', solve(False), 'false')\ncheck('boundary 3', solve(None), 'null')\ncheck('boundary 4', solve(2), '2')\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-boolean-kind","generated_at":"2026-09-29T14:37:21.798513+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.","root_cause":"The implementation applies an operation whose text or grammar semantics violate this contract: Encode a JSON scalar preserving bool, null, integer and string distinctions.","sha256":"bc9bd84aeca9afcadf770dc48c6885323df47580232def73c3429c35de6d946d","title":"Boolean values are serialized as numeric values · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":53.238,"exit_code":1,"observations":[{"actual":"1","check":"boundary 1","expected":"true","passed":false},{"actual":"0","check":"boundary 2","expected":"false","passed":false},{"actual":"null","check":"boundary 3","expected":"null","passed":true},{"actual":"2","check":"boundary 4","expected":"2","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"1\", \"expected\": \"true\", \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": \"0\", \"expected\": \"false\", \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": \"null\", \"expected\": \"null\", \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": \"2\", \"expected\": \"2\", \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":57.524,"exit_code":1,"observations":[{"actual":"True","check":"boundary 1","expected":"true","passed":false},{"actual":"False","check":"boundary 2","expected":"false","passed":false},{"actual":"None","check":"boundary 3","expected":"null","passed":false},{"actual":"2","check":"boundary 4","expected":"2","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"True\", \"expected\": \"true\", \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": \"False\", \"expected\": \"false\", \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": \"None\", \"expected\": \"null\", \"passed\": false}, {\"check\": \"boundary 4\", \"actual\": \"2\", \"expected\": \"2\", \"passed\": true}], \"passed\": false}\n"}},"member_only":{"stages":["fixed"],"fields":["implementations.fixed","verification.fixed","harness","repair"],"note":"The verified repair, its recorded checks, the repair description, and the scoring harness are available to members."}}