{"abstract":"Cache warning removal preserves persistent warnings.","category":"HTTP caching","checks":4,"contract":"Bounded offline decision model: cache warning removal preserves persistent warnings. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.","contract_signature":"warnings","evaluation_group":"xh-cache-warning-removal-preserves-persistent-warnings","failed_approach":"The attempted repair uses `[]` and still violates a separate fixture.","family":"xh-cache-warning-removal-preserves-persistent-warnings","id":"FA-6826","implementations":{"attempt":{"sha256":"7bffb7357f61e12c180cc0194fb54ad4edc8821ca0a8160276b8da28d61bce2c","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(warnings):\n    return []\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve([110, 214]), [214])\", \"check('fixture 2', solve([199, 200]), [200])\", \"check('fixture 3', solve([]), [])\", \"check('fixture 4', solve([214, 299]), [214, 299])\"]\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":"8703726ce8f60cfee2b16d53bf35effdbef913487188e5133ff2d0e80b3b832c","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(warnings):\n    return warnings\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve([110, 214]), [214])\", \"check('fixture 2', solve([199, 200]), [200])\", \"check('fixture 3', solve([]), [])\", \"check('fixture 4', solve([214, 299]), [214, 299])\"]\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-cache-warning-removal-preserves-persistent-warnings","generated_at":"2026-09-29T14:38:05.581294+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"This deterministic http caching model isolates the cache-warning-removal-preserves-persistent-warnings policy at a network component boundary.","root_cause":"The faulty implementation uses `warnings` for the cache-warning-removal-preserves-persistent-warnings decision.","sha256":"e84b40859345dccbc4aadb7f726c3cc006f52100b63e38cff2e581ebf3aef2bc","title":"Cache warning removal preserves persistent warnings · 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":35.941,"exit_code":1,"observations":[{"actual":[],"check":"fixture 2","expected":[200],"passed":false},{"actual":[],"check":"fixture 3","expected":[],"passed":true},{"actual":[],"check":"fixture 4","expected":[214,299],"passed":false},{"actual":[],"check":"fixture 1","expected":[214],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": [], \"expected\": [200], \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": [], \"expected\": [], \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": [], \"expected\": [214, 299], \"passed\": false}, {\"check\": \"fixture 1\", \"actual\": [], \"expected\": [214], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":87.104,"exit_code":1,"observations":[{"actual":[199,200],"check":"fixture 2","expected":[200],"passed":false},{"actual":[],"check":"fixture 3","expected":[],"passed":true},{"actual":[214,299],"check":"fixture 4","expected":[214,299],"passed":true},{"actual":[110,214],"check":"fixture 1","expected":[214],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": [199, 200], \"expected\": [200], \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": [], \"expected\": [], \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": [214, 299], \"expected\": [214, 299], \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": [110, 214], \"expected\": [214], \"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."}}