{"abstract":"Negative Retry-After delays are clamped before imposing a cap.","category":"HTTP retries","checks":4,"contract":"Negative Retry-After delays are clamped before imposing a cap: return the result specified by the explicit input/output boundary fixtures.","contract_signature":"delay, cap","evaluation_group":"xh-retry-after-delay","failed_approach":"The attempted repair uses `max(cap, max(0, delay))` and still violates a separate fixture.","family":"xh-retry-after-delay","id":"FA-6656","implementations":{"attempt":{"sha256":"095af1e918580ad09153ddb8cc6e77f829229574dc7d19000b3fe0e2111ab8a4","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(delay, cap):\n    return max(cap, max(0, delay))\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(-1, 10), 0)\", \"check('fixture 2', solve(3, 10), 3)\", \"check('fixture 3', solve(20, 10), 10)\", \"check('fixture 4', solve(0, 0), 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":"8a30b3782be156c4edfb4eca2a5878ec4df0a20352a26c02f46ded38c88fbe9c","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(delay, cap):\n    return min(cap, delay)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(-1, 10), 0)\", \"check('fixture 2', solve(3, 10), 3)\", \"check('fixture 3', solve(20, 10), 10)\", \"check('fixture 4', solve(0, 0), 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-retry-after-delay","generated_at":"2026-09-29T14:38:04.027260+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"This deterministic http retries model isolates the retry-after-delay policy at a network component boundary.","root_cause":"The faulty implementation uses `min(cap, delay)` for the retry-after-delay decision.","sha256":"0aab9e1d49453430c155ea882447c41270e92a16fc32b3cc8d2e7a0872c71e76","title":"Negative Retry-After delays are clamped before imposing a cap · 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":36.404,"exit_code":1,"observations":[{"actual":10,"check":"fixture 2","expected":3,"passed":false},{"actual":20,"check":"fixture 3","expected":10,"passed":false},{"actual":0,"check":"fixture 4","expected":0,"passed":true},{"actual":10,"check":"fixture 1","expected":0,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 10, \"expected\": 3, \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": 20, \"expected\": 10, \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": 10, \"expected\": 0, \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":35.452,"exit_code":1,"observations":[{"actual":3,"check":"fixture 2","expected":3,"passed":true},{"actual":10,"check":"fixture 3","expected":10,"passed":true},{"actual":0,"check":"fixture 4","expected":0,"passed":true},{"actual":-1,"check":"fixture 1","expected":0,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 3, \"expected\": 3, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": 10, \"expected\": 10, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": -1, \"expected\": 0, \"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."}}