{"abstract":"Pool idle expiry measures time since last use.","category":"Connection lifecycle","checks":4,"contract":"Bounded offline decision model: pool idle expiry measures time since last use. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.","contract_signature":"now, created, last_used","evaluation_group":"xh-pool-idle-expiry-measures-time-since-last-use","failed_approach":"The attempted repair uses `last_used-created` and still violates a separate fixture.","family":"xh-pool-idle-expiry-measures-time-since-last-use","id":"FA-7716","implementations":{"attempt":{"sha256":"35c6edc5863251424bfc81f56eab2cf87327427e1a236ba95f130a01c2570aa8","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(now, created, last_used):\n    return last_used-created\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(100, 0, 90), 10)\", \"check('fixture 2', solve(100, 90, 90), 10)\", \"check('fixture 3', solve(10, 0, 10), 0)\", \"check('fixture 4', solve(10, 0, 0), 10)\"]\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":"3c660fba718dd729115d0685ccaf1d8c8621c1c726549ef1b39bd8b79b4c687b","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(now, created, last_used):\n    return now-created\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(100, 0, 90), 10)\", \"check('fixture 2', solve(100, 90, 90), 10)\", \"check('fixture 3', solve(10, 0, 10), 0)\", \"check('fixture 4', solve(10, 0, 0), 10)\"]\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-pool-idle-expiry-measures-time-since-last-use","generated_at":"2026-09-29T14:38:14.644612+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"This deterministic connection lifecycle model isolates the pool-idle-expiry-measures-time-since-last-use policy at a network component boundary.","root_cause":"The faulty implementation uses `now-created` for the pool-idle-expiry-measures-time-since-last-use decision.","sha256":"a20b5592613b69298c71ff5bbd84a1bf100b5fc074b3fdc75033fe47eca11a34","title":"Pool idle expiry measures time since last use · 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":44.838,"exit_code":1,"observations":[{"actual":0,"check":"fixture 2","expected":10,"passed":false},{"actual":10,"check":"fixture 3","expected":0,"passed":false},{"actual":0,"check":"fixture 4","expected":10,"passed":false},{"actual":90,"check":"fixture 1","expected":10,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 0, \"expected\": 10, \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": 10, \"expected\": 0, \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": 0, \"expected\": 10, \"passed\": false}, {\"check\": \"fixture 1\", \"actual\": 90, \"expected\": 10, \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":60.056,"exit_code":1,"observations":[{"actual":10,"check":"fixture 2","expected":10,"passed":true},{"actual":10,"check":"fixture 3","expected":0,"passed":false},{"actual":10,"check":"fixture 4","expected":10,"passed":true},{"actual":100,"check":"fixture 1","expected":10,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 10, \"expected\": 10, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": 10, \"expected\": 0, \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": 10, \"expected\": 10, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": 100, \"expected\": 10, \"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."}}