{"abstract":"Transferring one buffer view leaves another alias marked readable on the main thread.","category":"Client state","checks":6,"contract":"Transferring a view detaches every main-thread view sharing its backing buffer, but leaves views of other buffers readable; unknown view names transfer nothing.","contract_signature":"views, transfer_views","evaluation_group":"s3-client-state-worker-transfer-aliases","failed_approach":"The partial repair still violates at least one explicit regression oracle.","family":"s3-client-state-worker-transfer-aliases","id":"FA-24836","implementations":{"attempt":{"sha256":"44161855b052e644a9331ebcf5405ae62877f92e154b4edd34f2c4b5bd473d38","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(views, transfer_views):\n    return [(name,not transfer_views) for name,buffer in views]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('two views one buffer', solve([('a','buf'),('b','buf'),('c','other')],['a']), [('a',False),('b',False),('c',True)])\ncheck('no transfer', solve([('a','buf')],[]), [('a',True)])\ncheck('unknown view', solve([('a','buf')],['missing']), [('a',True)])\ncheck('separate buffer transferred', solve([('a','x'),('b','y')],['b']), [('a',True),('b',False)])\ncheck('empty views', solve([],['a']), [])\ncheck('parameterized aliases', solve([(str(i),'shared') for i in range(N+1)],['0']), [(str(i),False) for i in range(N+1)])\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":"f44165781a7f80f4d531e1591926251d0d369df80e320bc3a146f32e194bac5d","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(views, transfer_views):\n    return [(name,name not in transfer_views) for name,buffer in views]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('two views one buffer', solve([('a','buf'),('b','buf'),('c','other')],['a']), [('a',False),('b',False),('c',True)])\ncheck('no transfer', solve([('a','buf')],[]), [('a',True)])\ncheck('unknown view', solve([('a','buf')],['missing']), [('a',True)])\ncheck('separate buffer transferred', solve([('a','x'),('b','y')],['b']), [('a',True),('b',False)])\ncheck('empty views', solve([],['a']), [])\ncheck('parameterized aliases', solve([(str(i),'shared') for i in range(N+1)],['0']), [(str(i),False) for i in range(N+1)])\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-worker-transfer-aliases","generated_at":"2026-09-29T14:41:01.207599+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.","root_cause":"The faulty implementation violates Transferring a view detaches every main-thread view sharing its backing buffer, but leaves views of other buffers readable; unknown view names transfer nothing.","sha256":"8adf91a3fef9413dba6278d31f30fb37a862817ce28333471d42a5e0c5b50adb","title":"Transferring one buffer view leaves another alias marked readable on the main thread · 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":38.293,"exit_code":1,"observations":[{"actual":[["a",false],["b",false],["c",false]],"check":"two views one buffer","expected":[["a",false],["b",false],["c",true]],"passed":false},{"actual":[["a",true]],"check":"no transfer","expected":[["a",true]],"passed":true},{"actual":[["a",false]],"check":"unknown view","expected":[["a",true]],"passed":false},{"actual":[["a",false],["b",false]],"check":"separate buffer transferred","expected":[["a",true],["b",false]],"passed":false},{"actual":[],"check":"empty views","expected":[],"passed":true},{"actual":[["0",false],["1",false]],"check":"parameterized aliases","expected":[["0",false],["1",false]],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"two views one buffer\", \"actual\": [[\"a\", false], [\"b\", false], [\"c\", false]], \"expected\": [[\"a\", false], [\"b\", false], [\"c\", true]], \"passed\": false}, {\"check\": \"no transfer\", \"actual\": [[\"a\", true]], \"expected\": [[\"a\", true]], \"passed\": true}, {\"check\": \"unknown view\", \"actual\": [[\"a\", false]], \"expected\": [[\"a\", true]], \"passed\": false}, {\"check\": \"separate buffer transferred\", \"actual\": [[\"a\", false], [\"b\", false]], \"expected\": [[\"a\", true], [\"b\", false]], \"passed\": false}, {\"check\": \"empty views\", \"actual\": [], \"expected\": [], \"passed\": true}, {\"check\": \"parameterized aliases\", \"actual\": [[\"0\", false], [\"1\", false]], \"expected\": [[\"0\", false], [\"1\", false]], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":38.794,"exit_code":1,"observations":[{"actual":[["a",false],["b",true],["c",true]],"check":"two views one buffer","expected":[["a",false],["b",false],["c",true]],"passed":false},{"actual":[["a",true]],"check":"no transfer","expected":[["a",true]],"passed":true},{"actual":[["a",true]],"check":"unknown view","expected":[["a",true]],"passed":true},{"actual":[["a",true],["b",false]],"check":"separate buffer transferred","expected":[["a",true],["b",false]],"passed":true},{"actual":[],"check":"empty views","expected":[],"passed":true},{"actual":[["0",false],["1",true]],"check":"parameterized aliases","expected":[["0",false],["1",false]],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"two views one buffer\", \"actual\": [[\"a\", false], [\"b\", true], [\"c\", true]], \"expected\": [[\"a\", false], [\"b\", false], [\"c\", true]], \"passed\": false}, {\"check\": \"no transfer\", \"actual\": [[\"a\", true]], \"expected\": [[\"a\", true]], \"passed\": true}, {\"check\": \"unknown view\", \"actual\": [[\"a\", true]], \"expected\": [[\"a\", true]], \"passed\": true}, {\"check\": \"separate buffer transferred\", \"actual\": [[\"a\", true], [\"b\", false]], \"expected\": [[\"a\", true], [\"b\", false]], \"passed\": true}, {\"check\": \"empty views\", \"actual\": [], \"expected\": [], \"passed\": true}, {\"check\": \"parameterized aliases\", \"actual\": [[\"0\", false], [\"1\", true]], \"expected\": [[\"0\", false], [\"1\", false]], \"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."}}