FA-22431 / Autocomplete interactions / Open access

Unavailable suggestion presentation: committed unavailable choice appears valid because its row exists · case 01

The validation completion transition produces an incorrect observable state.

Verified by executionVariant 1 · 22 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

At unavailable-options/validation, the implementation evaluates `d['value'] is None or d['value'] in d['ids']` instead of preserving the specified completion transition.

THE FAILURE

At unavailable-options/validation, the implementation evaluates `d['value'] is None or d['value'] in d['ids']` instead of preserving the specified completion transition.

Unsuccessful approach: The attempted repair uses `True`, which still violates a normal or boundary completion fixture.

Case contract

Unavailable options remain visible with reasons but cannot be committed or auto-selected. Availability is attached to identity, not display text. A committed unavailable value remains represented for correction. Disabled-only responses are distinct from empty results.

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 == 'visible': return d['ids']
    if event == 'eligible': return [x for x in d['ids'] if x not in d['disabled']]
    if event == 'commit': return d['active'] if d['active'] in d['ids'] and d['active'] not in d['disabled'] else None
    if event == 'reason': return d['reason'].get(d['active'])
    if event == 'selected': return d['value']
    if event == 'row-flags': return [x in d['disabled'] for x in d['ids']]
    if event == 'first-enabled': return next((x for x in d['ids'] if x not in d['disabled']),None)
    if event == 'status': return 'empty' if not d['ids'] else 'available' if any(x not in d['disabled'] for x in d['ids']) else 'unavailable'
    if event == 'validation': return d['value'] is None or d['value'] in d['ids']
    if event == 'revalidate': return {'active':None if d['active'] in d['disabled'] else d['active'],'epoch':d['epoch']}
    return {'unchanged': True}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
normal = {'ids':['a','b','c'],'disabled':['a','c'],'labels':['Same','Same','See'],'active':'a','value':'c','reason':{'a':'retired','c':'restricted'},'epoch':N}
boundary = {'ids':[],'disabled':[],'labels':[],'active':None,'value':None,'reason':{},'epoch':N}
check('normal visible', solve('visible', normal), ['a','b','c'])
check('boundary visible', solve('visible', boundary), [])
check('normal eligible', solve('eligible', normal), ['b'])
check('boundary eligible', solve('eligible', boundary), [])
check('normal commit', solve('commit', normal), None)
check('boundary commit', solve('commit', boundary), None)
check('normal reason', solve('reason', normal), 'retired')
check('boundary reason', solve('reason', boundary), None)
check('normal selected', solve('selected', normal), 'c')
check('boundary selected', solve('selected', boundary), None)
check('normal row-flags', solve('row-flags', normal), [True,False,True])
check('boundary row-flags', solve('row-flags', boundary), [])
check('normal first-enabled', solve('first-enabled', normal), 'b')
check('boundary first-enabled', solve('first-enabled', boundary), None)
check('normal status', solve('status', normal), 'available')
check('boundary status', solve('status', boundary), 'empty')
check('normal validation', solve('validation', normal), False)
check('boundary validation', solve('validation', boundary), True)
check('normal revalidate', solve('revalidate', normal), {'active':None,'epoch':N})
check('boundary revalidate', solve('revalidate', boundary), {'active':None,'epoch':N})
variant = dict(normal, **{'value':'id'+str(N)})
check('variant query or selection payload', solve('selected', variant), 'id'+str(N))
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 visible	`['a', 'b', 'c']`	`['a', 'b', 'c']`	Passed
boundary visible	`[]`	`[]`	Passed
normal eligible	`['b']`	`['b']`	Passed
boundary eligible	`[]`	`[]`	Passed
normal commit	`None`	`None`	Passed
boundary commit	`None`	`None`	Passed
normal reason	`retired`	`retired`	Passed
boundary reason	`None`	`None`	Passed
normal selected	`c`	`c`	Passed
boundary selected	`None`	`None`	Passed
normal row-flags	`[True, False, True]`	`[True, False, True]`	Passed
boundary row-flags	`[]`	`[]`	Passed
normal first-enabled	`b`	`b`	Passed
boundary first-enabled	`None`	`None`	Passed
normal status	`available`	`available`	Passed
boundary status	`empty`	`empty`	Passed
normal validation	`True`	`False`	Failed
boundary validation	`True`	`True`	Passed
normal revalidate	`{'active': None, 'epoch': 1}`	`{'active': None, 'epoch': 1}`	Passed
boundary revalidate	`{'active': None, 'epoch': 1}`	`{'active': None, 'epoch': 1}`	Passed
variant query or selection payload	`id1`	`id1`	Passed
unknown completion event	`{'unchanged': True}`	`{'unchanged': True}`	Passed

SHA-256 / 4ff851f4fd83c13c3d58b7faa41676b2474fe8ba794cf279d4fa8eafa135eb59

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 == 'visible': return d['ids']
    if event == 'eligible': return [x for x in d['ids'] if x not in d['disabled']]
    if event == 'commit': return d['active'] if d['active'] in d['ids'] and d['active'] not in d['disabled'] else None
    if event == 'reason': return d['reason'].get(d['active'])
    if event == 'selected': return d['value']
    if event == 'row-flags': return [x in d['disabled'] for x in d['ids']]
    if event == 'first-enabled': return next((x for x in d['ids'] if x not in d['disabled']),None)
    if event == 'status': return 'empty' if not d['ids'] else 'available' if any(x not in d['disabled'] for x in d['ids']) else 'unavailable'
    if event == 'validation': return True
    if event == 'revalidate': return {'active':None if d['active'] in d['disabled'] else d['active'],'epoch':d['epoch']}
    return {'unchanged': True}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
normal = {'ids':['a','b','c'],'disabled':['a','c'],'labels':['Same','Same','See'],'active':'a','value':'c','reason':{'a':'retired','c':'restricted'},'epoch':N}
boundary = {'ids':[],'disabled':[],'labels':[],'active':None,'value':None,'reason':{},'epoch':N}
check('normal visible', solve('visible', normal), ['a','b','c'])
check('boundary visible', solve('visible', boundary), [])
check('normal eligible', solve('eligible', normal), ['b'])
check('boundary eligible', solve('eligible', boundary), [])
check('normal commit', solve('commit', normal), None)
check('boundary commit', solve('commit', boundary), None)
check('normal reason', solve('reason', normal), 'retired')
check('boundary reason', solve('reason', boundary), None)
check('normal selected', solve('selected', normal), 'c')
check('boundary selected', solve('selected', boundary), None)
check('normal row-flags', solve('row-flags', normal), [True,False,True])
check('boundary row-flags', solve('row-flags', boundary), [])
check('normal first-enabled', solve('first-enabled', normal), 'b')
check('boundary first-enabled', solve('first-enabled', boundary), None)
check('normal status', solve('status', normal), 'available')
check('boundary status', solve('status', boundary), 'empty')
check('normal validation', solve('validation', normal), False)
check('boundary validation', solve('validation', boundary), True)
check('normal revalidate', solve('revalidate', normal), {'active':None,'epoch':N})
check('boundary revalidate', solve('revalidate', boundary), {'active':None,'epoch':N})
variant = dict(normal, **{'value':'id'+str(N)})
check('variant query or selection payload', solve('selected', variant), 'id'+str(N))
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 visible	`['a', 'b', 'c']`	`['a', 'b', 'c']`	Passed
boundary visible	`[]`	`[]`	Passed
normal eligible	`['b']`	`['b']`	Passed
boundary eligible	`[]`	`[]`	Passed
normal commit	`None`	`None`	Passed
boundary commit	`None`	`None`	Passed
normal reason	`retired`	`retired`	Passed
boundary reason	`None`	`None`	Passed
normal selected	`c`	`c`	Passed
boundary selected	`None`	`None`	Passed
normal row-flags	`[True, False, True]`	`[True, False, True]`	Passed
boundary row-flags	`[]`	`[]`	Passed
normal first-enabled	`b`	`b`	Passed
boundary first-enabled	`None`	`None`	Passed
normal status	`available`	`available`	Passed
boundary status	`empty`	`empty`	Passed
normal validation	`True`	`False`	Failed
boundary validation	`True`	`True`	Passed
normal revalidate	`{'active': None, 'epoch': 1}`	`{'active': None, 'epoch': 1}`	Passed
boundary revalidate	`{'active': None, 'epoch': 1}`	`{'active': None, 'epoch': 1}`	Passed
variant query or selection payload	`id1`	`id1`	Passed
unknown completion event	`{'unchanged': True}`	`{'unchanged': True}`	Passed

SHA-256 / 43bf0b6407bbed2e7bc847286f20ff8489516a6ff02839fa20784c469a960688

HELD IN THE MEMBER ARCHIVE

The verified repair and its recorded checks are member-only.

This mechanism has 22 recorded checks per implementation. The open-access tier publishes the failure and the unsuccessful fix; the repaired source that passes every check, and the observations that prove it, are available to members.

Every case sharing this mechanism uses the same contract and the same repair, so this one record is held back for all of them.

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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 2026-09-29T14:40:38.338314+00:00.

Case digest / 9e5892b6b2ee047da9b1557eff7466fc4c01dac6822d1d56a0d7322464d97fd0