{"abstract":"Route table refresh replaces removed routes.","category":"Network routing","checks":4,"contract":"Bounded offline decision model: route table refresh replaces removed routes. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.","evaluation_group":"xh-route-table-refresh-replaces-removed-routes","failed_approach":"The attempted repair uses `{k:v for k,v in old.items() if k in new}` and still violates a separate fixture.","family":"xh-route-table-refresh-replaces-removed-routes","id":"FA-7196","implementations":{"attempt":{"sha256":"7f6a7dbdc7b5bd7204f5dc699cc5cc15a0f840acac43ebf5d902c5812949aae9","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(old, new):\n    return {k:v for k,v in old.items() if k in new}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve({'a': 1, 'b': 2}, {'a': 3}), {'a': 3})\", \"check('fixture 2', solve({}, {'b': 2}), {'b': 2})\", \"check('fixture 3', solve({'a': 1}, {}), {})\", \"check('fixture 4', solve({}, {}), {})\"]\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":"67645ed01f748b7b649993c15f5104c44a1963dad4fce4fd9cfbe378a975fbed","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(old, new):\n    return dict(old,**new)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve({'a': 1, 'b': 2}, {'a': 3}), {'a': 3})\", \"check('fixture 2', solve({}, {'b': 2}), {'b': 2})\", \"check('fixture 3', solve({'a': 1}, {}), {})\", \"check('fixture 4', solve({}, {}), {})\"]\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":"59e77c024270bf930f0efec8f759583b7fb2c489776a0a8fe796bf0e30be4547","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(old, new):\n    return dict(new)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve({'a': 1, 'b': 2}, {'a': 3}), {'a': 3})\", \"check('fixture 2', solve({}, {'b': 2}), {'b': 2})\", \"check('fixture 3', solve({'a': 1}, {}), {})\", \"check('fixture 4', solve({}, {}), {})\"]\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-route-table-refresh-replaces-removed-routes","generated_at":"2026-09-29T14:38:09.220900+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"This deterministic network routing model isolates the route-table-refresh-replaces-removed-routes policy at a network component boundary.","repair":"Apply the explicit route-table-refresh-replaces-removed-routes contract, including the tested boundary and negative cases.","root_cause":"The faulty implementation uses `dict(old,**new)` for the route-table-refresh-replaces-removed-routes decision.","sha256":"4f553bdceca2909a3196f22a6140490bb6eee153e0a3fd8d0e7b425f47ee4378","title":"Route table refresh replaces removed routes · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":43.52,"exit_code":1,"observations":[{"actual":{},"check":"fixture 2","expected":{"b":2},"passed":false},{"actual":{},"check":"fixture 3","expected":{},"passed":true},{"actual":{},"check":"fixture 4","expected":{},"passed":true},{"actual":{"a":1},"check":"fixture 1","expected":{"a":3},"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": {}, \"expected\": {\"b\": 2}, \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": {}, \"expected\": {}, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": {}, \"expected\": {}, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": {\"a\": 1}, \"expected\": {\"a\": 3}, \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":45.674,"exit_code":1,"observations":[{"actual":{"b":2},"check":"fixture 2","expected":{"b":2},"passed":true},{"actual":{"a":1},"check":"fixture 3","expected":{},"passed":false},{"actual":{},"check":"fixture 4","expected":{},"passed":true},{"actual":{"a":3,"b":2},"check":"fixture 1","expected":{"a":3},"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": {\"b\": 2}, \"expected\": {\"b\": 2}, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": {\"a\": 1}, \"expected\": {}, \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": {}, \"expected\": {}, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": {\"a\": 3, \"b\": 2}, \"expected\": {\"a\": 3}, \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":41.405,"exit_code":0,"observations":[{"actual":{"b":2},"check":"fixture 2","expected":{"b":2},"passed":true},{"actual":{},"check":"fixture 3","expected":{},"passed":true},{"actual":{},"check":"fixture 4","expected":{},"passed":true},{"actual":{"a":3},"check":"fixture 1","expected":{"a":3},"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": {\"b\": 2}, \"expected\": {\"b\": 2}, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": {}, \"expected\": {}, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": {}, \"expected\": {}, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": {\"a\": 3}, \"expected\": {\"a\": 3}, \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}