{"abstract":"Dns cache key includes query type.","category":"DNS resolution","checks":4,"contract":"Bounded offline decision model: dns cache key includes query type. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.","contract_signature":"name, type_","evaluation_group":"xh-dns-cache-key-includes-query-type","failed_approach":"The attempted repair uses `(name,type_)` and still violates a separate fixture.","family":"xh-dns-cache-key-includes-query-type","id":"FA-7371","implementations":{"attempt":{"sha256":"ab97b28e11afe85888776dfe29da51aaa1803113b90422cae80d883cf69066ce","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport ipaddress\nimport re\nfrom urllib.parse import urlsplit, urljoin\nN = 1\nobservations = []\ndef solve(name, type_):\n    return (name,type_)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve('EXAMPLE.', 1), ('example', 1))\", \"check('fixture 2', solve('example', 28), ('example', 28))\", \"check('fixture 3', solve('x', 1), ('x', 1))\", \"check('fixture 4', solve('X.', 15), ('x', 15))\"]\nfor _line in _fixtures[N % len(_fixtures):] + _fixtures[:N % len(_fixtures)]:\n    exec(_line)\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":"a6fe16407682a0e663667363a12ba10f8dd03ee747768f747ea78505313cdce9","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport ipaddress\nimport re\nfrom urllib.parse import urlsplit, urljoin\nN = 1\nobservations = []\ndef solve(name, type_):\n    return name.lower().rstrip(\".\")\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve('EXAMPLE.', 1), ('example', 1))\", \"check('fixture 2', solve('example', 28), ('example', 28))\", \"check('fixture 3', solve('x', 1), ('x', 1))\", \"check('fixture 4', solve('X.', 15), ('x', 15))\"]\nfor _line in _fixtures[N % len(_fixtures):] + _fixtures[:N % len(_fixtures)]:\n    exec(_line)\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":"Bounded deterministic policy model over validated inputs; not a complete protocol stack or an interoperability claim. The five variants rotate the same explicit fixture set. 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":"xh-dns-cache-key-includes-query-type","generated_at":"2026-09-29T14:38:11.283178+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"This deterministic dns resolution model isolates the dns-cache-key-includes-query-type policy at a network component boundary.","root_cause":"The faulty implementation uses `name.lower().rstrip(\".\")` for the dns-cache-key-includes-query-type decision.","sha256":"3cc96f3385cdc2d481deb6ab9705f91041e41016b7b904685d6d2bef1a3ae2e2","title":"Dns cache key includes query type · 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":67.145,"exit_code":1,"observations":[{"actual":["example",28],"check":"fixture 2","expected":["example",28],"passed":true},{"actual":["x",1],"check":"fixture 3","expected":["x",1],"passed":true},{"actual":["X.",15],"check":"fixture 4","expected":["x",15],"passed":false},{"actual":["EXAMPLE.",1],"check":"fixture 1","expected":["example",1],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": [\"example\", 28], \"expected\": [\"example\", 28], \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": [\"x\", 1], \"expected\": [\"x\", 1], \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": [\"X.\", 15], \"expected\": [\"x\", 15], \"passed\": false}, {\"check\": \"fixture 1\", \"actual\": [\"EXAMPLE.\", 1], \"expected\": [\"example\", 1], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":55.834,"exit_code":1,"observations":[{"actual":"example","check":"fixture 2","expected":["example",28],"passed":false},{"actual":"x","check":"fixture 3","expected":["x",1],"passed":false},{"actual":"x","check":"fixture 4","expected":["x",15],"passed":false},{"actual":"example","check":"fixture 1","expected":["example",1],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": \"example\", \"expected\": [\"example\", 28], \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": \"x\", \"expected\": [\"x\", 1], \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": \"x\", \"expected\": [\"x\", 15], \"passed\": false}, {\"check\": \"fixture 1\", \"actual\": \"example\", \"expected\": [\"example\", 1], \"passed\": false}], \"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."}}