{"abstract":"Quic stream count limit converts index to one based count.","category":"Multiplexed protocols","checks":4,"contract":"Bounded offline decision model: quic stream count limit converts index to one based count. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.","evaluation_group":"xh-quic-stream-count-limit-converts-index-to-one-based-count","failed_approach":"The attempted repair uses `stream+1` and still violates a separate fixture.","family":"xh-quic-stream-count-limit-converts-index-to-one-based-count","id":"FA-7551","implementations":{"attempt":{"sha256":"f3979e5633187071c980432cc8c99077f0de15254ea4c5e93082498f34955eb9","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(stream):\n    return stream+1\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(0), 1)\", \"check('fixture 2', solve(4), 2)\", \"check('fixture 3', solve(3), 1)\", \"check('fixture 4', solve(8), 3)\"]\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":"9e4fc39da3ea1106550345834c8ff4843e85a9132bf2d766069fefffa5246706","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(stream):\n    return stream//4\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(0), 1)\", \"check('fixture 2', solve(4), 2)\", \"check('fixture 3', solve(3), 1)\", \"check('fixture 4', solve(8), 3)\"]\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":"e3a4a301656abf262dff5dc56ca9ec5142d1c66fec5d45a71c922cbbd875586c","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(stream):\n    return stream//4+1\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(0), 1)\", \"check('fixture 2', solve(4), 2)\", \"check('fixture 3', solve(3), 1)\", \"check('fixture 4', solve(8), 3)\"]\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-quic-stream-count-limit-converts-index-to-one-based-count","generated_at":"2026-09-29T14:38:13.035150+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"This deterministic multiplexed protocols model isolates the quic-stream-count-limit-converts-index-to-one-based-count policy at a network component boundary.","repair":"Apply the explicit quic-stream-count-limit-converts-index-to-one-based-count contract, including the tested boundary and negative cases.","root_cause":"The faulty implementation uses `stream//4` for the quic-stream-count-limit-converts-index-to-one-based-count decision.","sha256":"49538d06d37239829cf7eb8cf3d1f2fa619c1fcab3926d3d1cebd2582e607d78","title":"Quic stream count limit converts index to one based count · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":40.2,"exit_code":1,"observations":[{"actual":5,"check":"fixture 2","expected":2,"passed":false},{"actual":4,"check":"fixture 3","expected":1,"passed":false},{"actual":9,"check":"fixture 4","expected":3,"passed":false},{"actual":1,"check":"fixture 1","expected":1,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 5, \"expected\": 2, \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": 4, \"expected\": 1, \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": 9, \"expected\": 3, \"passed\": false}, {\"check\": \"fixture 1\", \"actual\": 1, \"expected\": 1, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":40.285,"exit_code":1,"observations":[{"actual":1,"check":"fixture 2","expected":2,"passed":false},{"actual":0,"check":"fixture 3","expected":1,"passed":false},{"actual":2,"check":"fixture 4","expected":3,"passed":false},{"actual":0,"check":"fixture 1","expected":1,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 1, \"expected\": 2, \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": 0, \"expected\": 1, \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": 2, \"expected\": 3, \"passed\": false}, {\"check\": \"fixture 1\", \"actual\": 0, \"expected\": 1, \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":42.786,"exit_code":0,"observations":[{"actual":2,"check":"fixture 2","expected":2,"passed":true},{"actual":1,"check":"fixture 3","expected":1,"passed":true},{"actual":3,"check":"fixture 4","expected":3,"passed":true},{"actual":1,"check":"fixture 1","expected":1,"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 2, \"expected\": 2, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": 3, \"expected\": 3, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": 1, \"expected\": 1, \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}