{"abstract":"Http2 padding consumes flow control credit.","category":"Multiplexed protocols","checks":4,"contract":"Bounded offline decision model: http2 padding consumes flow control credit. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.","evaluation_group":"xh-http2-padding-consumes-flow-control-credit","failed_approach":"The attempted repair uses `data+padding` and still violates a separate fixture.","family":"xh-http2-padding-consumes-flow-control-credit","id":"FA-7481","implementations":{"attempt":{"sha256":"18140804c72960bef0016a12e9a5f112aca22f03defecdf9e27b9c30524e5010","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(data, padding, has_padding):\n    return data+padding\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(10, 3, True), 14)\", \"check('fixture 2', solve(10, 0, True), 11)\", \"check('fixture 3', solve(10, 0, False), 10)\", \"check('fixture 4', solve(0, 0, False), 0)\"]\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":"1a89fd89db1f58ed04c277a5570ce5c10de3b777efaaf1859fb8cd408936d1a9","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(data, padding, has_padding):\n    return data\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(10, 3, True), 14)\", \"check('fixture 2', solve(10, 0, True), 11)\", \"check('fixture 3', solve(10, 0, False), 10)\", \"check('fixture 4', solve(0, 0, False), 0)\"]\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":"fa65284aecbb40ee7576854fffe2060fba996eefbc08434d186a8b85c4cbe00b","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(data, padding, has_padding):\n    return data+padding+int(has_padding)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(10, 3, True), 14)\", \"check('fixture 2', solve(10, 0, True), 11)\", \"check('fixture 3', solve(10, 0, False), 10)\", \"check('fixture 4', solve(0, 0, False), 0)\"]\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-http2-padding-consumes-flow-control-credit","generated_at":"2026-09-29T14:38:12.416174+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"This deterministic multiplexed protocols model isolates the http2-padding-consumes-flow-control-credit policy at a network component boundary.","repair":"Apply the explicit http2-padding-consumes-flow-control-credit contract, including the tested boundary and negative cases.","root_cause":"The faulty implementation uses `data` for the http2-padding-consumes-flow-control-credit decision.","sha256":"7031272511c067cb5e6b127684b3f3468d7f13c6f2f25eaa3e8453a04521210b","title":"Http2 padding consumes flow control credit · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":44.473,"exit_code":1,"observations":[{"actual":10,"check":"fixture 2","expected":11,"passed":false},{"actual":10,"check":"fixture 3","expected":10,"passed":true},{"actual":0,"check":"fixture 4","expected":0,"passed":true},{"actual":13,"check":"fixture 1","expected":14,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 10, \"expected\": 11, \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": 10, \"expected\": 10, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": 13, \"expected\": 14, \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":48.899,"exit_code":1,"observations":[{"actual":10,"check":"fixture 2","expected":11,"passed":false},{"actual":10,"check":"fixture 3","expected":10,"passed":true},{"actual":0,"check":"fixture 4","expected":0,"passed":true},{"actual":10,"check":"fixture 1","expected":14,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 10, \"expected\": 11, \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": 10, \"expected\": 10, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": 10, \"expected\": 14, \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":44.555,"exit_code":0,"observations":[{"actual":11,"check":"fixture 2","expected":11,"passed":true},{"actual":10,"check":"fixture 3","expected":10,"passed":true},{"actual":0,"check":"fixture 4","expected":0,"passed":true},{"actual":14,"check":"fixture 1","expected":14,"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 11, \"expected\": 11, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": 10, \"expected\": 10, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": 14, \"expected\": 14, \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}