{"abstract":"Dns search list is skipped for absolute query name.","category":"DNS resolution","checks":4,"contract":"Bounded offline decision model: dns search list is skipped for absolute query name. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.","evaluation_group":"xh-dns-search-list-is-skipped-for-absolute-query-name","failed_approach":"The attempted repair uses `[name]` and still violates a separate fixture.","family":"xh-dns-search-list-is-skipped-for-absolute-query-name","id":"FA-7406","implementations":{"attempt":{"sha256":"9ea90ca07c6b44dd7fb981f4236897413837cfd9d5fc74648a01e9f840933337","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, search):\n    return [name]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve('host.', ['example']), ['host.'])\", \"check('fixture 2', solve('host', ['example']), ['host.example', 'host'])\", \"check('fixture 3', solve('host', []), ['host'])\", \"check('fixture 4', solve('a.b', ['x', 'y']), ['a.b.x', 'a.b.y', 'a.b'])\"]\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":"87725be34aec6a6a7ccffed3db31fe9466aeb561c79c896f5cdd9fe77aeac053","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, search):\n    return [name+\".\"+s for s in search]+[name]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve('host.', ['example']), ['host.'])\", \"check('fixture 2', solve('host', ['example']), ['host.example', 'host'])\", \"check('fixture 3', solve('host', []), ['host'])\", \"check('fixture 4', solve('a.b', ['x', 'y']), ['a.b.x', 'a.b.y', 'a.b'])\"]\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"},"fixed":{"sha256":"148d4e96b2f9340a6bcd05c866113672addae9f034863a05797dc9d875f09c4a","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, search):\n    return [name] if name.endswith(\".\") else [name+\".\"+s for s in search]+[name]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve('host.', ['example']), ['host.'])\", \"check('fixture 2', solve('host', ['example']), ['host.example', 'host'])\", \"check('fixture 3', solve('host', []), ['host'])\", \"check('fixture 4', solve('a.b', ['x', 'y']), ['a.b.x', 'a.b.y', 'a.b'])\"]\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-search-list-is-skipped-for-absolute-query-name","generated_at":"2026-09-29T14:38:11.563909+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"This deterministic dns resolution model isolates the dns-search-list-is-skipped-for-absolute-query-name policy at a network component boundary.","repair":"Apply the explicit dns-search-list-is-skipped-for-absolute-query-name contract, including the tested boundary and negative cases.","root_cause":"The faulty implementation uses `[name+\".\"+s for s in search]+[name]` for the dns-search-list-is-skipped-for-absolute-query-name decision.","sha256":"b8eccc5e42d6e65431ccfa8ef075780f0bcfe82b5f97504ab8e1227c5f841d56","title":"Dns search list is skipped for absolute query name · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":45.434,"exit_code":1,"observations":[{"actual":["host"],"check":"fixture 2","expected":["host.example","host"],"passed":false},{"actual":["host"],"check":"fixture 3","expected":["host"],"passed":true},{"actual":["a.b"],"check":"fixture 4","expected":["a.b.x","a.b.y","a.b"],"passed":false},{"actual":["host."],"check":"fixture 1","expected":["host."],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": [\"host\"], \"expected\": [\"host.example\", \"host\"], \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": [\"host\"], \"expected\": [\"host\"], \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": [\"a.b\"], \"expected\": [\"a.b.x\", \"a.b.y\", \"a.b\"], \"passed\": false}, {\"check\": \"fixture 1\", \"actual\": [\"host.\"], \"expected\": [\"host.\"], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":45.851,"exit_code":1,"observations":[{"actual":["host.example","host"],"check":"fixture 2","expected":["host.example","host"],"passed":true},{"actual":["host"],"check":"fixture 3","expected":["host"],"passed":true},{"actual":["a.b.x","a.b.y","a.b"],"check":"fixture 4","expected":["a.b.x","a.b.y","a.b"],"passed":true},{"actual":["host..example","host."],"check":"fixture 1","expected":["host."],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": [\"host.example\", \"host\"], \"expected\": [\"host.example\", \"host\"], \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": [\"host\"], \"expected\": [\"host\"], \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": [\"a.b.x\", \"a.b.y\", \"a.b\"], \"expected\": [\"a.b.x\", \"a.b.y\", \"a.b\"], \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": [\"host..example\", \"host.\"], \"expected\": [\"host.\"], \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":45.482,"exit_code":0,"observations":[{"actual":["host.example","host"],"check":"fixture 2","expected":["host.example","host"],"passed":true},{"actual":["host"],"check":"fixture 3","expected":["host"],"passed":true},{"actual":["a.b.x","a.b.y","a.b"],"check":"fixture 4","expected":["a.b.x","a.b.y","a.b"],"passed":true},{"actual":["host."],"check":"fixture 1","expected":["host."],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": [\"host.example\", \"host\"], \"expected\": [\"host.example\", \"host\"], \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": [\"host\"], \"expected\": [\"host\"], \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": [\"a.b.x\", \"a.b.y\", \"a.b\"], \"expected\": [\"a.b.x\", \"a.b.y\", \"a.b\"], \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": [\"host.\"], \"expected\": [\"host.\"], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}