{"abstract":"Disabled deny rules remain effective.","category":"Configuration","checks":8,"contract":"Return deny if any applicable explicit deny, allow if at least one applicable allow, otherwise the provided default. Ignore disabled and nonmatching rules. Unknown effects do not grant access.","contract_signature":"rules, resource, default","evaluation_group":"xt-policy-combine","failed_approach":"The attempted repair substitutes if not enabled and. Fixture 3 still yields False instead of True.","family":"xt-policy-combine-disabled-rule","id":"FA-9781","implementations":{"attempt":{"sha256":"2d397ac8e1697ce39ebc5294ed91a769d68fa3bbe4c4c1d27c12077d3527933c","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(rules, resource, default):\n    effects = [effect for pattern, effect, enabled in rules if not enabled and pattern in [resource, '*']]\n    if 'deny' in effects: return False\n    if 'allow' in effects: return True\n    return default\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve([], 'a', False), False)\ncheck('fixture 2', solve([], 'a', True), True)\ncheck('fixture 3', solve([('a', 'allow', True)], 'a', False), True)\ncheck('fixture 4', solve([('a', 'deny', True), ('a', 'allow', True)], 'a', True), False)\ncheck('fixture 5', solve([('a', 'deny', False)], 'a', True), True)\ncheck('fixture 6', solve([('b', 'allow', True)], 'a', False), False)\ncheck('fixture 7', solve([('*', 'allow', True)], 'a', False), True)\ncheck('fixture 8', solve([('a', 'unknown', True)], 'a', False), False)\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":"1fdb9bc38b7d87b532893b2e4f52b9a9dd67e49da21bc190f23337c288dc8db8","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(rules, resource, default):\n    effects = [effect for pattern, effect, enabled in rules if True and pattern in [resource, '*']]\n    if 'deny' in effects: return False\n    if 'allow' in effects: return True\n    return default\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve([], 'a', False), False)\ncheck('fixture 2', solve([], 'a', True), True)\ncheck('fixture 3', solve([('a', 'allow', True)], 'a', False), True)\ncheck('fixture 4', solve([('a', 'deny', True), ('a', 'allow', True)], 'a', True), False)\ncheck('fixture 5', solve([('a', 'deny', False)], 'a', True), True)\ncheck('fixture 6', solve([('b', 'allow', True)], 'a', False), False)\ncheck('fixture 7', solve([('*', 'allow', True)], 'a', False), True)\ncheck('fixture 8', solve([('a', 'unknown', True)], 'a', False), False)\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":"xt-policy-combine-disabled-rule","generated_at":"2026-09-29T14:38:33.242105+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"An offline model of access policy decision combination, suitable for testing build and release tooling without external services.","root_cause":"The implementation substitutes if True and for if enabled and, so disabled deny rules remain effective.","sha256":"3a9f4a444bbd3c4dd24187cf33e0b3bce9680786899589e0f663f87b1830d563","title":"Access policy decision combination: Disabled deny rules remain effective · 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":37.751,"exit_code":1,"observations":[{"actual":false,"check":"fixture 1","expected":false,"passed":true},{"actual":true,"check":"fixture 2","expected":true,"passed":true},{"actual":false,"check":"fixture 3","expected":true,"passed":false},{"actual":true,"check":"fixture 4","expected":false,"passed":false},{"actual":false,"check":"fixture 5","expected":true,"passed":false},{"actual":false,"check":"fixture 6","expected":false,"passed":true},{"actual":false,"check":"fixture 7","expected":true,"passed":false},{"actual":false,"check":"fixture 8","expected":false,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 2\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": false, \"expected\": true, \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": true, \"expected\": false, \"passed\": false}, {\"check\": \"fixture 5\", \"actual\": false, \"expected\": true, \"passed\": false}, {\"check\": \"fixture 6\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 7\", \"actual\": false, \"expected\": true, \"passed\": false}, {\"check\": \"fixture 8\", \"actual\": false, \"expected\": false, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":38.454,"exit_code":1,"observations":[{"actual":false,"check":"fixture 1","expected":false,"passed":true},{"actual":true,"check":"fixture 2","expected":true,"passed":true},{"actual":true,"check":"fixture 3","expected":true,"passed":true},{"actual":false,"check":"fixture 4","expected":false,"passed":true},{"actual":false,"check":"fixture 5","expected":true,"passed":false},{"actual":false,"check":"fixture 6","expected":false,"passed":true},{"actual":true,"check":"fixture 7","expected":true,"passed":true},{"actual":false,"check":"fixture 8","expected":false,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 2\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 5\", \"actual\": false, \"expected\": true, \"passed\": false}, {\"check\": \"fixture 6\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 7\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"fixture 8\", \"actual\": false, \"expected\": false, \"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."}}