{"abstract":"A committed transition leaves its dependent render lanes pending.","category":"Client state","checks":6,"contract":"Committing any render lane commits the undirected transitive closure of its entangled lanes; unrelated pending lanes retain order.","evaluation_group":"s3-client-state-transition-entanglement","failed_approach":"The partial repair still violates at least one explicit regression oracle.","family":"s3-client-state-transition-entanglement","id":"FA-24726","implementations":{"attempt":{"sha256":"bd80b33e13f4c22aa6b29651356a758ceed29761c0539d5e4d7ecd69ffa82f40","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(pending, links, committed):\n    done=set(committed)|{b for a,b in links if a in committed}\n    return [x for x in pending if x not in done]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('chain closure', solve(list(range(N+3)),[(i,i+1) for i in range(N+1)],[0]), [N+2])\ncheck('reverse dependency', solve(['a','b','c'],[('a','b')],['b']), ['c'])\ncheck('cycle', solve(['a','b','c'],[('a','b'),('b','a')],['a']), ['c'])\ncheck('unrelated lane', solve(['a','b'],[],['a']), ['b'])\ncheck('no commit', solve(['a','b'],[('a','b')],[]), ['a','b'])\ncheck('already absent', solve(['c'],[('a','b')],['a']), ['c'])\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":"899eba72caf65afd63ad6c5f625edcee9d3b8b872bae755a24c628b905e74182","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(pending, links, committed):\n    return [x for x in pending if x not in committed]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('chain closure', solve(list(range(N+3)),[(i,i+1) for i in range(N+1)],[0]), [N+2])\ncheck('reverse dependency', solve(['a','b','c'],[('a','b')],['b']), ['c'])\ncheck('cycle', solve(['a','b','c'],[('a','b'),('b','a')],['a']), ['c'])\ncheck('unrelated lane', solve(['a','b'],[],['a']), ['b'])\ncheck('no commit', solve(['a','b'],[('a','b')],[]), ['a','b'])\ncheck('already absent', solve(['c'],[('a','b')],['a']), ['c'])\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":"16fece9420a9f4fdf28bb4c5a634c3145dea6cb586e801579917276ea1c86d45","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(pending, links, committed):\n    done=set(committed)\n    while True:\n        expanded=done|{b for a,b in links if a in done}|{a for a,b in links if b in done}\n        if expanded==done: break\n        done=expanded\n    return [x for x in pending if x not in done]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('chain closure', solve(list(range(N+3)),[(i,i+1) for i in range(N+1)],[0]), [N+2])\ncheck('reverse dependency', solve(['a','b','c'],[('a','b')],['b']), ['c'])\ncheck('cycle', solve(['a','b','c'],[('a','b'),('b','a')],['a']), ['c'])\ncheck('unrelated lane', solve(['a','b'],[],['a']), ['b'])\ncheck('no commit', solve(['a','b'],[('a','b')],[]), ['a','b'])\ncheck('already absent', solve(['c'],[('a','b')],['a']), ['c'])\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":"This models the stated application policy only; no browser or framework conformance is claimed. 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":"s3-client-state-transition-entanglement","generated_at":"2026-09-29T14:41:00.075243+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"A bounded offline client-state transition with explicit lifecycle inputs.","repair":"Committing any render lane commits the undirected transitive closure of its entangled lanes; unrelated pending lanes retain order.","root_cause":"The faulty implementation violates Committing any render lane commits the undirected transitive closure of its entangled lanes; unrelated pending lanes retain order.","sha256":"019550b2fd1e2a0a3c2232d58c086d4839cc05375301c7edd8fd17f6bed2ea2b","title":"A committed transition leaves its dependent render lanes pending · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":40.476,"exit_code":1,"observations":[{"actual":[2,3],"check":"chain closure","expected":[3],"passed":false},{"actual":["a","c"],"check":"reverse dependency","expected":["c"],"passed":false},{"actual":["c"],"check":"cycle","expected":["c"],"passed":true},{"actual":["b"],"check":"unrelated lane","expected":["b"],"passed":true},{"actual":["a","b"],"check":"no commit","expected":["a","b"],"passed":true},{"actual":["c"],"check":"already absent","expected":["c"],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"chain closure\", \"actual\": [2, 3], \"expected\": [3], \"passed\": false}, {\"check\": \"reverse dependency\", \"actual\": [\"a\", \"c\"], \"expected\": [\"c\"], \"passed\": false}, {\"check\": \"cycle\", \"actual\": [\"c\"], \"expected\": [\"c\"], \"passed\": true}, {\"check\": \"unrelated lane\", \"actual\": [\"b\"], \"expected\": [\"b\"], \"passed\": true}, {\"check\": \"no commit\", \"actual\": [\"a\", \"b\"], \"expected\": [\"a\", \"b\"], \"passed\": true}, {\"check\": \"already absent\", \"actual\": [\"c\"], \"expected\": [\"c\"], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":41.134,"exit_code":1,"observations":[{"actual":[1,2,3],"check":"chain closure","expected":[3],"passed":false},{"actual":["a","c"],"check":"reverse dependency","expected":["c"],"passed":false},{"actual":["b","c"],"check":"cycle","expected":["c"],"passed":false},{"actual":["b"],"check":"unrelated lane","expected":["b"],"passed":true},{"actual":["a","b"],"check":"no commit","expected":["a","b"],"passed":true},{"actual":["c"],"check":"already absent","expected":["c"],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"chain closure\", \"actual\": [1, 2, 3], \"expected\": [3], \"passed\": false}, {\"check\": \"reverse dependency\", \"actual\": [\"a\", \"c\"], \"expected\": [\"c\"], \"passed\": false}, {\"check\": \"cycle\", \"actual\": [\"b\", \"c\"], \"expected\": [\"c\"], \"passed\": false}, {\"check\": \"unrelated lane\", \"actual\": [\"b\"], \"expected\": [\"b\"], \"passed\": true}, {\"check\": \"no commit\", \"actual\": [\"a\", \"b\"], \"expected\": [\"a\", \"b\"], \"passed\": true}, {\"check\": \"already absent\", \"actual\": [\"c\"], \"expected\": [\"c\"], \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":39.965,"exit_code":0,"observations":[{"actual":[3],"check":"chain closure","expected":[3],"passed":true},{"actual":["c"],"check":"reverse dependency","expected":["c"],"passed":true},{"actual":["c"],"check":"cycle","expected":["c"],"passed":true},{"actual":["b"],"check":"unrelated lane","expected":["b"],"passed":true},{"actual":["a","b"],"check":"no commit","expected":["a","b"],"passed":true},{"actual":["c"],"check":"already absent","expected":["c"],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"chain closure\", \"actual\": [3], \"expected\": [3], \"passed\": true}, {\"check\": \"reverse dependency\", \"actual\": [\"c\"], \"expected\": [\"c\"], \"passed\": true}, {\"check\": \"cycle\", \"actual\": [\"c\"], \"expected\": [\"c\"], \"passed\": true}, {\"check\": \"unrelated lane\", \"actual\": [\"b\"], \"expected\": [\"b\"], \"passed\": true}, {\"check\": \"no commit\", \"actual\": [\"a\", \"b\"], \"expected\": [\"a\", \"b\"], \"passed\": true}, {\"check\": \"already absent\", \"actual\": [\"c\"], \"expected\": [\"c\"], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}