FA-22276 / Autocomplete interactions / Open access
Free-text option creation: failed creation erases the draft required for correction · case 01
The failure completion transition produces an incorrect observable state.
ROOT CAUSE
At create-option/failure, the implementation evaluates `{'draft':'','error':d['error'],'pending':False}` instead of preserving the specified completion transition.
VERIFIED REPAIR
Implement the failure contract using `{'draft':d['draft'],'error':d['error'],'pending':False}`.
Unsuccessful approach: The attempted repair uses `{'draft':d['draft'],'error':None,'pending':False}`, which still violates a normal or boundary completion fixture.
Case contract
This picker may create a new option from trimmed draft only when creation is enabled, the draft is nonempty, no case-insensitive exact label exists, and no create transaction is pending. Synthetic create rows carry a distinct namespace and raw text is never mistaken for a persisted identifier.
Why this case matters
Autocomplete couples draft text, suggestion identity and asynchronous presentation; this bounded lifecycle model isolates one observable interaction defect.
1 / The failure
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(event, d):
if event == 'trim': return d['draft'].strip()
if event == 'exact': return d['draft'].strip().casefold() in [x.casefold() for x in d['labels']]
if event == 'nonempty': return bool(d['draft'].strip())
if event == 'permission': return d['allow']
if event == 'busy': return not d['pending']
if event == 'row-id': return 'create:'+d['draft'].strip()
if event == 'resolve': return d['persisted']
if event == 'failure': return {'draft':'','error':d['error'],'pending':False}
if event == 'pending-value': return None if d['pending'] else d['persisted']
if event == 'retry': return {'text':d['draft'].strip(),'query_epoch':d['query_epoch']+1}
return {'unchanged': True}
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
normal = {'draft':' Plum ','labels':['Pear','plum'],'allow':True,'pending':True,'temporary':'tmp:'+str(N),'persisted':'p'+str(N),'error':'rejected','query_epoch':N}
boundary = {'draft':' ','labels':[],'allow':False,'pending':False,'temporary':'tmp:'+str(N),'persisted':'','error':None,'query_epoch':N}
check('normal trim', solve('trim', normal), 'Plum')
check('boundary trim', solve('trim', boundary), '')
check('normal exact', solve('exact', normal), True)
check('boundary exact', solve('exact', boundary), False)
check('normal nonempty', solve('nonempty', normal), True)
check('boundary nonempty', solve('nonempty', boundary), False)
check('normal permission', solve('permission', normal), True)
check('boundary permission', solve('permission', boundary), False)
check('normal busy', solve('busy', normal), False)
check('boundary busy', solve('busy', boundary), True)
check('normal row-id', solve('row-id', normal), 'create:Plum')
check('boundary row-id', solve('row-id', boundary), 'create:')
check('normal resolve', solve('resolve', normal), 'p'+str(N))
check('boundary resolve', solve('resolve', boundary), '')
check('normal failure', solve('failure', normal), {'draft':' Plum ','error':'rejected','pending':False})
check('boundary failure', solve('failure', boundary), {'draft':' ','error':None,'pending':False})
check('normal pending-value', solve('pending-value', normal), None)
check('boundary pending-value', solve('pending-value', boundary), '')
check('normal retry', solve('retry', normal), {'text':'Plum','query_epoch':N+1})
check('boundary retry', solve('retry', boundary), {'text':'','query_epoch':N+1})
variant = dict(normal, **{'draft':' '*N+'Plum'+' '*N})
check('variant query or selection payload', solve('trim', variant), 'Plum')
check('unknown completion event', solve('unrecognized', normal), {'unchanged': True})
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| normal trim | Plum | Plum | Passed |
| boundary trim | | | Passed |
| normal exact | True | True | Passed |
| boundary exact | False | False | Passed |
| normal nonempty | True | True | Passed |
| boundary nonempty | False | False | Passed |
| normal permission | True | True | Passed |
| boundary permission | False | False | Passed |
| normal busy | False | False | Passed |
| boundary busy | True | True | Passed |
| normal row-id | create:Plum | create:Plum | Passed |
| boundary row-id | create: | create: | Passed |
| normal resolve | p1 | p1 | Passed |
| boundary resolve | | | Passed |
| normal failure | {'draft': '', 'error': 'rejected', 'pending': False} | {'draft': ' Plum ', 'error': 'rejected', 'pending': False} | Failed |
| boundary failure | {'draft': '', 'error': None, 'pending': False} | {'draft': ' ', 'error': None, 'pending': False} | Failed |
| normal pending-value | None | None | Passed |
| boundary pending-value | | | Passed |
| normal retry | {'query_epoch': 2, 'text': 'Plum'} | {'query_epoch': 2, 'text': 'Plum'} | Passed |
| boundary retry | {'query_epoch': 2, 'text': ''} | {'query_epoch': 2, 'text': ''} | Passed |
| variant query or selection payload | Plum | Plum | Passed |
| unknown completion event | {'unchanged': True} | {'unchanged': True} | Passed |
SHA-256 / 19af59f7b3a5d3e29f344bfc7606e5a91c8aa475e6383a9e14ddcd096b1da2a5
2 / The unsuccessful fix
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(event, d):
if event == 'trim': return d['draft'].strip()
if event == 'exact': return d['draft'].strip().casefold() in [x.casefold() for x in d['labels']]
if event == 'nonempty': return bool(d['draft'].strip())
if event == 'permission': return d['allow']
if event == 'busy': return not d['pending']
if event == 'row-id': return 'create:'+d['draft'].strip()
if event == 'resolve': return d['persisted']
if event == 'failure': return {'draft':d['draft'],'error':None,'pending':False}
if event == 'pending-value': return None if d['pending'] else d['persisted']
if event == 'retry': return {'text':d['draft'].strip(),'query_epoch':d['query_epoch']+1}
return {'unchanged': True}
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
normal = {'draft':' Plum ','labels':['Pear','plum'],'allow':True,'pending':True,'temporary':'tmp:'+str(N),'persisted':'p'+str(N),'error':'rejected','query_epoch':N}
boundary = {'draft':' ','labels':[],'allow':False,'pending':False,'temporary':'tmp:'+str(N),'persisted':'','error':None,'query_epoch':N}
check('normal trim', solve('trim', normal), 'Plum')
check('boundary trim', solve('trim', boundary), '')
check('normal exact', solve('exact', normal), True)
check('boundary exact', solve('exact', boundary), False)
check('normal nonempty', solve('nonempty', normal), True)
check('boundary nonempty', solve('nonempty', boundary), False)
check('normal permission', solve('permission', normal), True)
check('boundary permission', solve('permission', boundary), False)
check('normal busy', solve('busy', normal), False)
check('boundary busy', solve('busy', boundary), True)
check('normal row-id', solve('row-id', normal), 'create:Plum')
check('boundary row-id', solve('row-id', boundary), 'create:')
check('normal resolve', solve('resolve', normal), 'p'+str(N))
check('boundary resolve', solve('resolve', boundary), '')
check('normal failure', solve('failure', normal), {'draft':' Plum ','error':'rejected','pending':False})
check('boundary failure', solve('failure', boundary), {'draft':' ','error':None,'pending':False})
check('normal pending-value', solve('pending-value', normal), None)
check('boundary pending-value', solve('pending-value', boundary), '')
check('normal retry', solve('retry', normal), {'text':'Plum','query_epoch':N+1})
check('boundary retry', solve('retry', boundary), {'text':'','query_epoch':N+1})
variant = dict(normal, **{'draft':' '*N+'Plum'+' '*N})
check('variant query or selection payload', solve('trim', variant), 'Plum')
check('unknown completion event', solve('unrecognized', normal), {'unchanged': True})
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| normal trim | Plum | Plum | Passed |
| boundary trim | | | Passed |
| normal exact | True | True | Passed |
| boundary exact | False | False | Passed |
| normal nonempty | True | True | Passed |
| boundary nonempty | False | False | Passed |
| normal permission | True | True | Passed |
| boundary permission | False | False | Passed |
| normal busy | False | False | Passed |
| boundary busy | True | True | Passed |
| normal row-id | create:Plum | create:Plum | Passed |
| boundary row-id | create: | create: | Passed |
| normal resolve | p1 | p1 | Passed |
| boundary resolve | | | Passed |
| normal failure | {'draft': ' Plum ', 'error': None, 'pending': False} | {'draft': ' Plum ', 'error': 'rejected', 'pending': False} | Failed |
| boundary failure | {'draft': ' ', 'error': None, 'pending': False} | {'draft': ' ', 'error': None, 'pending': False} | Passed |
| normal pending-value | None | None | Passed |
| boundary pending-value | | | Passed |
| normal retry | {'query_epoch': 2, 'text': 'Plum'} | {'query_epoch': 2, 'text': 'Plum'} | Passed |
| boundary retry | {'query_epoch': 2, 'text': ''} | {'query_epoch': 2, 'text': ''} | Passed |
| variant query or selection payload | Plum | Plum | Passed |
| unknown completion event | {'unchanged': True} | {'unchanged': True} | Passed |
SHA-256 / 4a7459393998e4482ccd2d90d4d7e4cc31928b37d433d53afd4a06252fa25b9e
3 / The verified repair
Exit 0"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(event, d):
if event == 'trim': return d['draft'].strip()
if event == 'exact': return d['draft'].strip().casefold() in [x.casefold() for x in d['labels']]
if event == 'nonempty': return bool(d['draft'].strip())
if event == 'permission': return d['allow']
if event == 'busy': return not d['pending']
if event == 'row-id': return 'create:'+d['draft'].strip()
if event == 'resolve': return d['persisted']
if event == 'failure': return {'draft':d['draft'],'error':d['error'],'pending':False}
if event == 'pending-value': return None if d['pending'] else d['persisted']
if event == 'retry': return {'text':d['draft'].strip(),'query_epoch':d['query_epoch']+1}
return {'unchanged': True}
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
normal = {'draft':' Plum ','labels':['Pear','plum'],'allow':True,'pending':True,'temporary':'tmp:'+str(N),'persisted':'p'+str(N),'error':'rejected','query_epoch':N}
boundary = {'draft':' ','labels':[],'allow':False,'pending':False,'temporary':'tmp:'+str(N),'persisted':'','error':None,'query_epoch':N}
check('normal trim', solve('trim', normal), 'Plum')
check('boundary trim', solve('trim', boundary), '')
check('normal exact', solve('exact', normal), True)
check('boundary exact', solve('exact', boundary), False)
check('normal nonempty', solve('nonempty', normal), True)
check('boundary nonempty', solve('nonempty', boundary), False)
check('normal permission', solve('permission', normal), True)
check('boundary permission', solve('permission', boundary), False)
check('normal busy', solve('busy', normal), False)
check('boundary busy', solve('busy', boundary), True)
check('normal row-id', solve('row-id', normal), 'create:Plum')
check('boundary row-id', solve('row-id', boundary), 'create:')
check('normal resolve', solve('resolve', normal), 'p'+str(N))
check('boundary resolve', solve('resolve', boundary), '')
check('normal failure', solve('failure', normal), {'draft':' Plum ','error':'rejected','pending':False})
check('boundary failure', solve('failure', boundary), {'draft':' ','error':None,'pending':False})
check('normal pending-value', solve('pending-value', normal), None)
check('boundary pending-value', solve('pending-value', boundary), '')
check('normal retry', solve('retry', normal), {'text':'Plum','query_epoch':N+1})
check('boundary retry', solve('retry', boundary), {'text':'','query_epoch':N+1})
variant = dict(normal, **{'draft':' '*N+'Plum'+' '*N})
check('variant query or selection payload', solve('trim', variant), 'Plum')
check('unknown completion event', solve('unrecognized', normal), {'unchanged': True})
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| normal trim | Plum | Plum | Passed |
| boundary trim | | | Passed |
| normal exact | True | True | Passed |
| boundary exact | False | False | Passed |
| normal nonempty | True | True | Passed |
| boundary nonempty | False | False | Passed |
| normal permission | True | True | Passed |
| boundary permission | False | False | Passed |
| normal busy | False | False | Passed |
| boundary busy | True | True | Passed |
| normal row-id | create:Plum | create:Plum | Passed |
| boundary row-id | create: | create: | Passed |
| normal resolve | p1 | p1 | Passed |
| boundary resolve | | | Passed |
| normal failure | {'draft': ' Plum ', 'error': 'rejected', 'pending': False} | {'draft': ' Plum ', 'error': 'rejected', 'pending': False} | Passed |
| boundary failure | {'draft': ' ', 'error': None, 'pending': False} | {'draft': ' ', 'error': None, 'pending': False} | Passed |
| normal pending-value | None | None | Passed |
| boundary pending-value | | | Passed |
| normal retry | {'query_epoch': 2, 'text': 'Plum'} | {'query_epoch': 2, 'text': 'Plum'} | Passed |
| boundary retry | {'query_epoch': 2, 'text': ''} | {'query_epoch': 2, 'text': ''} | Passed |
| variant query or selection payload | Plum | Plum | Passed |
| unknown completion event | {'unchanged': True} | {'unchanged': True} | Passed |
SHA-256 / ab148b2290c7acae5f273912b13164d42e3ce97e9b9bae54067a9aa775b2c8c1
Verification & scope
Stipulated deterministic widget transition model; inputs are validated snapshots. It does not model browser event dispatch, network transport, or linguistic standards. 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.
Observations recorded using Python 3.12.14 at 2026-09-29T14:40:36.929440+00:00.
Case digest / 805614247f1cfd967513526d9e515bbc3e83c9bbe50fa861bc919b9454d05487