{"abstract":"The event trace violates the replace update rule and produces incorrect keyboard state or command output.","category":"Keyboard interactions","checks":11,"contract":"Events [kind,owner,text]. Start replaces active preedit, update applies only to active owner, commit appends supplied text once for active owner and closes, cancel closes matching owner without committing, focus switches cancel old owner. Return committed strings, active owner and preedit. Inputs are finite ordered event traces; return the stated deterministic state. Batch entries are independent. N varies the number of independent input transactions.","evaluation_group":"s3-keyboard-composition-transaction","failed_approach":"The partial repair changes this transition to preedit=text[:1]\n        updates, which still violates the model contract on the explicit regression traces.","family":"s3-keyboard-interactions-composition-transaction-replace-update","id":"FA-30906","implementations":{"attempt":{"sha256":"b2b91581649a2bdd129beb06263dfd0f97801eda6285695322650384431a1806","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(cases):\n    def run(c):\n        owner=None; preedit=''; committed=[]; updates=0\n        for kind,target,text in c:\n            if kind=='start':\n                owner=target\n                preedit=text\n            elif kind=='update' and target==owner:\n                preedit=text[:1]\n                updates+=1\n            elif kind=='commit' and target==owner and owner is not None:\n                committed.append(text)\n                owner=None\n                preedit=''\n            elif kind=='cancel' and target==owner:\n                owner=None; preedit=''\n            elif kind=='focus' and target!=owner:\n                owner=None; preedit=''\n        return [committed,owner,preedit,updates]\n    return [run(c) for c in cases]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('composition-transaction scenario 0', solve([[]] * N), [[[], None, '', 0]] * N)\ncheck('composition-transaction scenario 1', solve([[['start', 'a', 'x'], ['update', 'a', 'xy'], ['update', 'a', 'xyz']]] * N), [[[], 'a', 'xyz', 2]] * N)\ncheck('composition-transaction scenario 2', solve([[['start', 'a', 'x'], ['start', 'b', 'b']]] * N), [[[], 'b', 'b', 0]] * N)\ncheck('composition-transaction scenario 3', solve([[['start', 'a', 'x'], ['update', 'b', 'oops']]] * N), [[[], 'a', 'x', 0]] * N)\ncheck('composition-transaction scenario 4', solve([[['start', 'a', 'x'], ['commit', 'a', 'word'], ['commit', 'a', 'word']]] * N), [[['word'], None, '', 0]] * N)\ncheck('composition-transaction scenario 5', solve([[['commit', 'x', 'orphan']]] * N), [[[], None, '', 0]] * N)\ncheck('composition-transaction scenario 6', solve([[['start', 'a', 'x'], ['commit', 'b', 'bad']]] * N), [[[], 'a', 'x', 0]] * N)\ncheck('composition-transaction scenario 7', solve([[['start', 'a', 'x'], ['cancel', 'b', '']]] * N), [[[], 'a', 'x', 0]] * N)\ncheck('composition-transaction scenario 8', solve([[['start', 'a', 'x'], ['cancel', 'a', '']]] * N), [[[], None, '', 0]] * N)\ncheck('composition-transaction scenario 9', solve([[['start', 'a', 'x'], ['focus', 'b', '']]] * N), [[[], None, '', 0]] * N)\ncheck('composition-transaction scenario 10', solve([[['start', 'a', 'x'], ['focus', 'a', '']]] * N), [[[], 'a', 'x', 0]] * N)\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":"6d7081d01a6cdfa9b0cc62cbbda3bbbb4e5574d9564341b7df75d5d5705ab026","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(cases):\n    def run(c):\n        owner=None; preedit=''; committed=[]; updates=0\n        for kind,target,text in c:\n            if kind=='start':\n                owner=target\n                preedit=text\n            elif kind=='update' and target==owner:\n                preedit+=text\n                updates+=1\n            elif kind=='commit' and target==owner and owner is not None:\n                committed.append(text)\n                owner=None\n                preedit=''\n            elif kind=='cancel' and target==owner:\n                owner=None; preedit=''\n            elif kind=='focus' and target!=owner:\n                owner=None; preedit=''\n        return [committed,owner,preedit,updates]\n    return [run(c) for c in cases]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('composition-transaction scenario 0', solve([[]] * N), [[[], None, '', 0]] * N)\ncheck('composition-transaction scenario 1', solve([[['start', 'a', 'x'], ['update', 'a', 'xy'], ['update', 'a', 'xyz']]] * N), [[[], 'a', 'xyz', 2]] * N)\ncheck('composition-transaction scenario 2', solve([[['start', 'a', 'x'], ['start', 'b', 'b']]] * N), [[[], 'b', 'b', 0]] * N)\ncheck('composition-transaction scenario 3', solve([[['start', 'a', 'x'], ['update', 'b', 'oops']]] * N), [[[], 'a', 'x', 0]] * N)\ncheck('composition-transaction scenario 4', solve([[['start', 'a', 'x'], ['commit', 'a', 'word'], ['commit', 'a', 'word']]] * N), [[['word'], None, '', 0]] * N)\ncheck('composition-transaction scenario 5', solve([[['commit', 'x', 'orphan']]] * N), [[[], None, '', 0]] * N)\ncheck('composition-transaction scenario 6', solve([[['start', 'a', 'x'], ['commit', 'b', 'bad']]] * N), [[[], 'a', 'x', 0]] * N)\ncheck('composition-transaction scenario 7', solve([[['start', 'a', 'x'], ['cancel', 'b', '']]] * N), [[[], 'a', 'x', 0]] * N)\ncheck('composition-transaction scenario 8', solve([[['start', 'a', 'x'], ['cancel', 'a', '']]] * N), [[[], None, '', 0]] * N)\ncheck('composition-transaction scenario 9', solve([[['start', 'a', 'x'], ['focus', 'b', '']]] * N), [[[], None, '', 0]] * N)\ncheck('composition-transaction scenario 10', solve([[['start', 'a', 'x'], ['focus', 'a', '']]] * N), [[[], 'a', 'x', 0]] * N)\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":"77f68c9bfbe67ce241dc060af7eab8f8539940cd030f354deced08ac704351a0","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(cases):\n    def run(c):\n        owner=None; preedit=''; committed=[]; updates=0\n        for kind,target,text in c:\n            if kind=='start':\n                owner=target\n                preedit=text\n            elif kind=='update' and target==owner:\n                preedit=text\n                updates+=1\n            elif kind=='commit' and target==owner and owner is not None:\n                committed.append(text)\n                owner=None\n                preedit=''\n            elif kind=='cancel' and target==owner:\n                owner=None; preedit=''\n            elif kind=='focus' and target!=owner:\n                owner=None; preedit=''\n        return [committed,owner,preedit,updates]\n    return [run(c) for c in cases]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('composition-transaction scenario 0', solve([[]] * N), [[[], None, '', 0]] * N)\ncheck('composition-transaction scenario 1', solve([[['start', 'a', 'x'], ['update', 'a', 'xy'], ['update', 'a', 'xyz']]] * N), [[[], 'a', 'xyz', 2]] * N)\ncheck('composition-transaction scenario 2', solve([[['start', 'a', 'x'], ['start', 'b', 'b']]] * N), [[[], 'b', 'b', 0]] * N)\ncheck('composition-transaction scenario 3', solve([[['start', 'a', 'x'], ['update', 'b', 'oops']]] * N), [[[], 'a', 'x', 0]] * N)\ncheck('composition-transaction scenario 4', solve([[['start', 'a', 'x'], ['commit', 'a', 'word'], ['commit', 'a', 'word']]] * N), [[['word'], None, '', 0]] * N)\ncheck('composition-transaction scenario 5', solve([[['commit', 'x', 'orphan']]] * N), [[[], None, '', 0]] * N)\ncheck('composition-transaction scenario 6', solve([[['start', 'a', 'x'], ['commit', 'b', 'bad']]] * N), [[[], 'a', 'x', 0]] * N)\ncheck('composition-transaction scenario 7', solve([[['start', 'a', 'x'], ['cancel', 'b', '']]] * N), [[[], 'a', 'x', 0]] * N)\ncheck('composition-transaction scenario 8', solve([[['start', 'a', 'x'], ['cancel', 'a', '']]] * N), [[[], None, '', 0]] * N)\ncheck('composition-transaction scenario 9', solve([[['start', 'a', 'x'], ['focus', 'b', '']]] * N), [[[], None, '', 0]] * N)\ncheck('composition-transaction scenario 10', solve([[['start', 'a', 'x'], ['focus', 'a', '']]] * N), [[[], 'a', 'x', 0]] * N)\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":"Offline stipulated event model, not a browser implementation or web standard conformance claim. 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-keyboard-interactions-composition-transaction-replace-update","generated_at":"2026-09-29T14:41:57.152435+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Controlled keyboard event processing model for debugging application event logic.","repair":"Use the contract transition `preedit=text\n        updates` at the replace update fault site; preserve the other state transitions.","root_cause":"Composition update is treated as incremental text rather than a replacement.","sha256":"747f6e8355f720b9d55d87b59b66d6e2d703832908727f1529ada4d16e7e6d9b","title":"Composition transaction ownership: Composition update is treated as incremental text rather than a replacement · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":42.208,"exit_code":1,"observations":[{"actual":[[[],null,"",0]],"check":"composition-transaction scenario 0","expected":[[[],null,"",0]],"passed":true},{"actual":[[[],"a","x",2]],"check":"composition-transaction scenario 1","expected":[[[],"a","xyz",2]],"passed":false},{"actual":[[[],"b","b",0]],"check":"composition-transaction scenario 2","expected":[[[],"b","b",0]],"passed":true},{"actual":[[[],"a","x",0]],"check":"composition-transaction scenario 3","expected":[[[],"a","x",0]],"passed":true},{"actual":[[["word"],null,"",0]],"check":"composition-transaction scenario 4","expected":[[["word"],null,"",0]],"passed":true},{"actual":[[[],null,"",0]],"check":"composition-transaction scenario 5","expected":[[[],null,"",0]],"passed":true},{"actual":[[[],"a","x",0]],"check":"composition-transaction scenario 6","expected":[[[],"a","x",0]],"passed":true},{"actual":[[[],"a","x",0]],"check":"composition-transaction scenario 7","expected":[[[],"a","x",0]],"passed":true},{"actual":[[[],null,"",0]],"check":"composition-transaction scenario 8","expected":[[[],null,"",0]],"passed":true},{"actual":[[[],null,"",0]],"check":"composition-transaction scenario 9","expected":[[[],null,"",0]],"passed":true},{"actual":[[[],"a","x",0]],"check":"composition-transaction scenario 10","expected":[[[],"a","x",0]],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"composition-transaction scenario 0\", \"actual\": [[[], null, \"\", 0]], \"expected\": [[[], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 1\", \"actual\": [[[], \"a\", \"x\", 2]], \"expected\": [[[], \"a\", \"xyz\", 2]], \"passed\": false}, {\"check\": \"composition-transaction scenario 2\", \"actual\": [[[], \"b\", \"b\", 0]], \"expected\": [[[], \"b\", \"b\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 3\", \"actual\": [[[], \"a\", \"x\", 0]], \"expected\": [[[], \"a\", \"x\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 4\", \"actual\": [[[\"word\"], null, \"\", 0]], \"expected\": [[[\"word\"], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 5\", \"actual\": [[[], null, \"\", 0]], \"expected\": [[[], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 6\", \"actual\": [[[], \"a\", \"x\", 0]], \"expected\": [[[], \"a\", \"x\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 7\", \"actual\": [[[], \"a\", \"x\", 0]], \"expected\": [[[], \"a\", \"x\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 8\", \"actual\": [[[], null, \"\", 0]], \"expected\": [[[], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 9\", \"actual\": [[[], null, \"\", 0]], \"expected\": [[[], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 10\", \"actual\": [[[], \"a\", \"x\", 0]], \"expected\": [[[], \"a\", \"x\", 0]], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":41.832,"exit_code":1,"observations":[{"actual":[[[],null,"",0]],"check":"composition-transaction scenario 0","expected":[[[],null,"",0]],"passed":true},{"actual":[[[],"a","xxyxyz",2]],"check":"composition-transaction scenario 1","expected":[[[],"a","xyz",2]],"passed":false},{"actual":[[[],"b","b",0]],"check":"composition-transaction scenario 2","expected":[[[],"b","b",0]],"passed":true},{"actual":[[[],"a","x",0]],"check":"composition-transaction scenario 3","expected":[[[],"a","x",0]],"passed":true},{"actual":[[["word"],null,"",0]],"check":"composition-transaction scenario 4","expected":[[["word"],null,"",0]],"passed":true},{"actual":[[[],null,"",0]],"check":"composition-transaction scenario 5","expected":[[[],null,"",0]],"passed":true},{"actual":[[[],"a","x",0]],"check":"composition-transaction scenario 6","expected":[[[],"a","x",0]],"passed":true},{"actual":[[[],"a","x",0]],"check":"composition-transaction scenario 7","expected":[[[],"a","x",0]],"passed":true},{"actual":[[[],null,"",0]],"check":"composition-transaction scenario 8","expected":[[[],null,"",0]],"passed":true},{"actual":[[[],null,"",0]],"check":"composition-transaction scenario 9","expected":[[[],null,"",0]],"passed":true},{"actual":[[[],"a","x",0]],"check":"composition-transaction scenario 10","expected":[[[],"a","x",0]],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"composition-transaction scenario 0\", \"actual\": [[[], null, \"\", 0]], \"expected\": [[[], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 1\", \"actual\": [[[], \"a\", \"xxyxyz\", 2]], \"expected\": [[[], \"a\", \"xyz\", 2]], \"passed\": false}, {\"check\": \"composition-transaction scenario 2\", \"actual\": [[[], \"b\", \"b\", 0]], \"expected\": [[[], \"b\", \"b\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 3\", \"actual\": [[[], \"a\", \"x\", 0]], \"expected\": [[[], \"a\", \"x\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 4\", \"actual\": [[[\"word\"], null, \"\", 0]], \"expected\": [[[\"word\"], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 5\", \"actual\": [[[], null, \"\", 0]], \"expected\": [[[], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 6\", \"actual\": [[[], \"a\", \"x\", 0]], \"expected\": [[[], \"a\", \"x\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 7\", \"actual\": [[[], \"a\", \"x\", 0]], \"expected\": [[[], \"a\", \"x\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 8\", \"actual\": [[[], null, \"\", 0]], \"expected\": [[[], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 9\", \"actual\": [[[], null, \"\", 0]], \"expected\": [[[], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 10\", \"actual\": [[[], \"a\", \"x\", 0]], \"expected\": [[[], \"a\", \"x\", 0]], \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":39.43,"exit_code":0,"observations":[{"actual":[[[],null,"",0]],"check":"composition-transaction scenario 0","expected":[[[],null,"",0]],"passed":true},{"actual":[[[],"a","xyz",2]],"check":"composition-transaction scenario 1","expected":[[[],"a","xyz",2]],"passed":true},{"actual":[[[],"b","b",0]],"check":"composition-transaction scenario 2","expected":[[[],"b","b",0]],"passed":true},{"actual":[[[],"a","x",0]],"check":"composition-transaction scenario 3","expected":[[[],"a","x",0]],"passed":true},{"actual":[[["word"],null,"",0]],"check":"composition-transaction scenario 4","expected":[[["word"],null,"",0]],"passed":true},{"actual":[[[],null,"",0]],"check":"composition-transaction scenario 5","expected":[[[],null,"",0]],"passed":true},{"actual":[[[],"a","x",0]],"check":"composition-transaction scenario 6","expected":[[[],"a","x",0]],"passed":true},{"actual":[[[],"a","x",0]],"check":"composition-transaction scenario 7","expected":[[[],"a","x",0]],"passed":true},{"actual":[[[],null,"",0]],"check":"composition-transaction scenario 8","expected":[[[],null,"",0]],"passed":true},{"actual":[[[],null,"",0]],"check":"composition-transaction scenario 9","expected":[[[],null,"",0]],"passed":true},{"actual":[[[],"a","x",0]],"check":"composition-transaction scenario 10","expected":[[[],"a","x",0]],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"composition-transaction scenario 0\", \"actual\": [[[], null, \"\", 0]], \"expected\": [[[], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 1\", \"actual\": [[[], \"a\", \"xyz\", 2]], \"expected\": [[[], \"a\", \"xyz\", 2]], \"passed\": true}, {\"check\": \"composition-transaction scenario 2\", \"actual\": [[[], \"b\", \"b\", 0]], \"expected\": [[[], \"b\", \"b\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 3\", \"actual\": [[[], \"a\", \"x\", 0]], \"expected\": [[[], \"a\", \"x\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 4\", \"actual\": [[[\"word\"], null, \"\", 0]], \"expected\": [[[\"word\"], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 5\", \"actual\": [[[], null, \"\", 0]], \"expected\": [[[], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 6\", \"actual\": [[[], \"a\", \"x\", 0]], \"expected\": [[[], \"a\", \"x\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 7\", \"actual\": [[[], \"a\", \"x\", 0]], \"expected\": [[[], \"a\", \"x\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 8\", \"actual\": [[[], null, \"\", 0]], \"expected\": [[[], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 9\", \"actual\": [[[], null, \"\", 0]], \"expected\": [[[], null, \"\", 0]], \"passed\": true}, {\"check\": \"composition-transaction scenario 10\", \"actual\": [[[], \"a\", \"x\", 0]], \"expected\": [[[], \"a\", \"x\", 0]], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}