{"abstract":"Rejected samples still produce log records.","category":"Observability","checks":8,"contract":"Emit a log only when severity reaches the threshold, logger is enabled, sampling selected it, it is not suppressed, and all required fields exist. False-valued fields count as present.","evaluation_group":"xt-log-policy","failed_approach":"The attempted repair substitutes and not sampled and. Fixture 1 still yields False instead of True.","family":"xt-log-policy-sampling-decision","id":"FA-10291","implementations":{"attempt":{"sha256":"84cf6f3af9d4dfbea981a3fe66fae7d9af163526df553393aad2503e58eef7bd","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(event, threshold, enabled, sampled, suppressed, required):\n    return event['level'] >= threshold and enabled and not sampled and not suppressed and set(required) <= set(event)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve({'level': 2, 'message': 'x'}, 2, True, True, False, ['message']), True)\ncheck('fixture 2', solve({'level': 1, 'message': 'x'}, 2, True, True, False, ['message']), False)\ncheck('fixture 3', solve({'level': 3, 'message': 'x'}, 2, True, True, False, ['message']), True)\ncheck('fixture 4', solve({'level': 2, 'message': 'x'}, 2, False, True, False, ['message']), False)\ncheck('fixture 5', solve({'level': 2, 'message': 'x'}, 2, True, False, False, ['message']), False)\ncheck('fixture 6', solve({'level': 2, 'message': 'x'}, 2, True, True, True, ['message']), False)\ncheck('fixture 7', solve({'level': 2}, 2, True, True, False, ['message']), False)\ncheck('fixture 8', solve({'level': 2, 'message': False}, 2, True, True, False, ['message']), True)\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":"86b500f0b5304fa7289c885d1341e77c5819b5a42885adac13de5608614a4acb","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(event, threshold, enabled, sampled, suppressed, required):\n    return event['level'] >= threshold and enabled and True and not suppressed and set(required) <= set(event)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve({'level': 2, 'message': 'x'}, 2, True, True, False, ['message']), True)\ncheck('fixture 2', solve({'level': 1, 'message': 'x'}, 2, True, True, False, ['message']), False)\ncheck('fixture 3', solve({'level': 3, 'message': 'x'}, 2, True, True, False, ['message']), True)\ncheck('fixture 4', solve({'level': 2, 'message': 'x'}, 2, False, True, False, ['message']), False)\ncheck('fixture 5', solve({'level': 2, 'message': 'x'}, 2, True, False, False, ['message']), False)\ncheck('fixture 6', solve({'level': 2, 'message': 'x'}, 2, True, True, True, ['message']), False)\ncheck('fixture 7', solve({'level': 2}, 2, True, True, False, ['message']), False)\ncheck('fixture 8', solve({'level': 2, 'message': False}, 2, True, True, False, ['message']), True)\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":"f4bbb946152e17c26a856a860be6e984a70a96eaa3cc9b26f45ef7745c0f0652","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(event, threshold, enabled, sampled, suppressed, required):\n    return event['level'] >= threshold and enabled and sampled and not suppressed and set(required) <= set(event)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve({'level': 2, 'message': 'x'}, 2, True, True, False, ['message']), True)\ncheck('fixture 2', solve({'level': 1, 'message': 'x'}, 2, True, True, False, ['message']), False)\ncheck('fixture 3', solve({'level': 3, 'message': 'x'}, 2, True, True, False, ['message']), True)\ncheck('fixture 4', solve({'level': 2, 'message': 'x'}, 2, False, True, False, ['message']), False)\ncheck('fixture 5', solve({'level': 2, 'message': 'x'}, 2, True, False, False, ['message']), False)\ncheck('fixture 6', solve({'level': 2, 'message': 'x'}, 2, True, True, True, ['message']), False)\ncheck('fixture 7', solve({'level': 2}, 2, True, True, False, ['message']), False)\ncheck('fixture 8', solve({'level': 2, 'message': False}, 2, True, True, False, ['message']), True)\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-log-policy-sampling-decision","generated_at":"2026-09-29T14:38:37.709197+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"An offline model of structured log emission policy, suitable for testing build and release tooling without external services.","repair":"Honor the supplied sampling decision.","root_cause":"The implementation substitutes and True and for and sampled and, so rejected samples still produce log records.","sha256":"fe2ac2f5f6b62eef0651a858e5cf4de91d9b893fedeb94e13e796b1c50b8c11a","title":"Structured log emission policy: Rejected samples still produce log records · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":41.973,"exit_code":1,"observations":[{"actual":false,"check":"fixture 1","expected":true,"passed":false},{"actual":false,"check":"fixture 2","expected":false,"passed":true},{"actual":false,"check":"fixture 3","expected":true,"passed":false},{"actual":false,"check":"fixture 4","expected":false,"passed":true},{"actual":true,"check":"fixture 5","expected":false,"passed":false},{"actual":false,"check":"fixture 6","expected":false,"passed":true},{"actual":false,"check":"fixture 7","expected":false,"passed":true},{"actual":false,"check":"fixture 8","expected":true,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": false, \"expected\": true, \"passed\": false}, {\"check\": \"fixture 2\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": false, \"expected\": true, \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 5\", \"actual\": true, \"expected\": false, \"passed\": false}, {\"check\": \"fixture 6\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 7\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 8\", \"actual\": false, \"expected\": true, \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":38.006,"exit_code":1,"observations":[{"actual":true,"check":"fixture 1","expected":true,"passed":true},{"actual":false,"check":"fixture 2","expected":false,"passed":true},{"actual":true,"check":"fixture 3","expected":true,"passed":true},{"actual":false,"check":"fixture 4","expected":false,"passed":true},{"actual":true,"check":"fixture 5","expected":false,"passed":false},{"actual":false,"check":"fixture 6","expected":false,"passed":true},{"actual":false,"check":"fixture 7","expected":false,"passed":true},{"actual":true,"check":"fixture 8","expected":true,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"fixture 2\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 5\", \"actual\": true, \"expected\": false, \"passed\": false}, {\"check\": \"fixture 6\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 7\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 8\", \"actual\": true, \"expected\": true, \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":39.574,"exit_code":0,"observations":[{"actual":true,"check":"fixture 1","expected":true,"passed":true},{"actual":false,"check":"fixture 2","expected":false,"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":false,"passed":true},{"actual":false,"check":"fixture 6","expected":false,"passed":true},{"actual":false,"check":"fixture 7","expected":false,"passed":true},{"actual":true,"check":"fixture 8","expected":true,"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"fixture 2\", \"actual\": false, \"expected\": false, \"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\": false, \"passed\": true}, {\"check\": \"fixture 6\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 7\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 8\", \"actual\": true, \"expected\": true, \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}