FA-23286 / Autocomplete interactions / Open access

Unresolved autocomplete draft on blur: blur emits a value change solely because search draft differs · case 01

The changed completion transition produces an incorrect observable state.

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

ROOT CAUSE

At blur-resolution/changed, the implementation evaluates `d['draft']!=d['label']` instead of preserving the specified completion transition.

VERIFIED REPAIR

Implement the changed contract using `False`.

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

Case contract

This strict-selection picker reverts an unresolved draft to the committed label after blur unless a suggestion pointer acceptance or IME composition is in progress. Exact unique candidate confirmation is an explicit separate transition. Blur never chooses a highlighted candidate merely because it exists.

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 == 'revert': return d['label']
    if event == 'value': return d['value']
    if event == 'pointer': return not d['pointer_pending']
    if event == 'composition': return not d['composing']
    if event == 'exact': return d['exact_ids'][0] if len(d['exact_ids'])==1 else None
    if event == 'touched': return True
    if event == 'pending': return None
    if event == 'free-text-rejection': return {'resolved':d['value'] is not None,'free_text':None}
    if event == 'unresolved-validation': return {'invalid_draft':d['draft']!=d['label'],'candidate':None}
    if event == 'changed': return d['draft']!=d['label']
    return {'unchanged': True}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
normal = {'draft':'peach','value':'p1','label':'Pear','active':'p2','pointer_pending':True,'composing':True,'exact_ids':['p3','p4'],'query_epoch':N,'pending':'peach','touched':False}
boundary = {'draft':'','value':None,'label':'','active':None,'pointer_pending':False,'composing':False,'exact_ids':[''],'query_epoch':N,'pending':None,'touched':True}
check('normal revert', solve('revert', normal), 'Pear')
check('boundary revert', solve('revert', boundary), '')
check('normal value', solve('value', normal), 'p1')
check('boundary value', solve('value', boundary), None)
check('normal pointer', solve('pointer', normal), False)
check('boundary pointer', solve('pointer', boundary), True)
check('normal composition', solve('composition', normal), False)
check('boundary composition', solve('composition', boundary), True)
check('normal exact', solve('exact', normal), None)
check('boundary exact', solve('exact', boundary), '')
check('normal touched', solve('touched', normal), True)
check('boundary touched', solve('touched', boundary), True)
check('normal pending', solve('pending', normal), None)
check('boundary pending', solve('pending', boundary), None)
check('normal free-text-rejection', solve('free-text-rejection', normal), {'resolved':True,'free_text':None})
check('boundary free-text-rejection', solve('free-text-rejection', boundary), {'resolved':False,'free_text':None})
check('normal unresolved-validation', solve('unresolved-validation', normal), {'invalid_draft':True,'candidate':None})
check('boundary unresolved-validation', solve('unresolved-validation', boundary), {'invalid_draft':False,'candidate':None})
check('normal changed', solve('changed', normal), False)
check('boundary changed', solve('changed', boundary), False)
variant = dict(normal, **{'label':'L'*N})
check('variant query or selection payload', solve('revert', variant), 'L'*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 revert	`Pear`	`Pear`	Passed
boundary revert			Passed
normal value	`p1`	`p1`	Passed
boundary value	`None`	`None`	Passed
normal pointer	`False`	`False`	Passed
boundary pointer	`True`	`True`	Passed
normal composition	`False`	`False`	Passed
boundary composition	`True`	`True`	Passed
normal exact	`None`	`None`	Passed
boundary exact			Passed
normal touched	`True`	`True`	Passed
boundary touched	`True`	`True`	Passed
normal pending	`None`	`None`	Passed
boundary pending	`None`	`None`	Passed
normal free-text-rejection	`{'free_text': None, 'resolved': True}`	`{'free_text': None, 'resolved': True}`	Passed
boundary free-text-rejection	`{'free_text': None, 'resolved': False}`	`{'free_text': None, 'resolved': False}`	Passed
normal unresolved-validation	`{'candidate': None, 'invalid_draft': True}`	`{'candidate': None, 'invalid_draft': True}`	Passed
boundary unresolved-validation	`{'candidate': None, 'invalid_draft': False}`	`{'candidate': None, 'invalid_draft': False}`	Passed
normal changed	`True`	`False`	Failed
boundary changed	`False`	`False`	Passed
variant query or selection payload	`L`	`L`	Passed
unknown completion event	`{'unchanged': True}`	`{'unchanged': True}`	Passed

SHA-256 / 4d0368bd6eefeec131795ce07c40fc324ab636f9b239f33e018725a873b01082

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 == 'revert': return d['label']
    if event == 'value': return d['value']
    if event == 'pointer': return not d['pointer_pending']
    if event == 'composition': return not d['composing']
    if event == 'exact': return d['exact_ids'][0] if len(d['exact_ids'])==1 else None
    if event == 'touched': return True
    if event == 'pending': return None
    if event == 'free-text-rejection': return {'resolved':d['value'] is not None,'free_text':None}
    if event == 'unresolved-validation': return {'invalid_draft':d['draft']!=d['label'],'candidate':None}
    if event == 'changed': return True
    return {'unchanged': True}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
normal = {'draft':'peach','value':'p1','label':'Pear','active':'p2','pointer_pending':True,'composing':True,'exact_ids':['p3','p4'],'query_epoch':N,'pending':'peach','touched':False}
boundary = {'draft':'','value':None,'label':'','active':None,'pointer_pending':False,'composing':False,'exact_ids':[''],'query_epoch':N,'pending':None,'touched':True}
check('normal revert', solve('revert', normal), 'Pear')
check('boundary revert', solve('revert', boundary), '')
check('normal value', solve('value', normal), 'p1')
check('boundary value', solve('value', boundary), None)
check('normal pointer', solve('pointer', normal), False)
check('boundary pointer', solve('pointer', boundary), True)
check('normal composition', solve('composition', normal), False)
check('boundary composition', solve('composition', boundary), True)
check('normal exact', solve('exact', normal), None)
check('boundary exact', solve('exact', boundary), '')
check('normal touched', solve('touched', normal), True)
check('boundary touched', solve('touched', boundary), True)
check('normal pending', solve('pending', normal), None)
check('boundary pending', solve('pending', boundary), None)
check('normal free-text-rejection', solve('free-text-rejection', normal), {'resolved':True,'free_text':None})
check('boundary free-text-rejection', solve('free-text-rejection', boundary), {'resolved':False,'free_text':None})
check('normal unresolved-validation', solve('unresolved-validation', normal), {'invalid_draft':True,'candidate':None})
check('boundary unresolved-validation', solve('unresolved-validation', boundary), {'invalid_draft':False,'candidate':None})
check('normal changed', solve('changed', normal), False)
check('boundary changed', solve('changed', boundary), False)
variant = dict(normal, **{'label':'L'*N})
check('variant query or selection payload', solve('revert', variant), 'L'*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 revert	`Pear`	`Pear`	Passed
boundary revert			Passed
normal value	`p1`	`p1`	Passed
boundary value	`None`	`None`	Passed
normal pointer	`False`	`False`	Passed
boundary pointer	`True`	`True`	Passed
normal composition	`False`	`False`	Passed
boundary composition	`True`	`True`	Passed
normal exact	`None`	`None`	Passed
boundary exact			Passed
normal touched	`True`	`True`	Passed
boundary touched	`True`	`True`	Passed
normal pending	`None`	`None`	Passed
boundary pending	`None`	`None`	Passed
normal free-text-rejection	`{'free_text': None, 'resolved': True}`	`{'free_text': None, 'resolved': True}`	Passed
boundary free-text-rejection	`{'free_text': None, 'resolved': False}`	`{'free_text': None, 'resolved': False}`	Passed
normal unresolved-validation	`{'candidate': None, 'invalid_draft': True}`	`{'candidate': None, 'invalid_draft': True}`	Passed
boundary unresolved-validation	`{'candidate': None, 'invalid_draft': False}`	`{'candidate': None, 'invalid_draft': False}`	Passed
normal changed	`True`	`False`	Failed
boundary changed	`True`	`False`	Failed
variant query or selection payload	`L`	`L`	Passed
unknown completion event	`{'unchanged': True}`	`{'unchanged': True}`	Passed

SHA-256 / fbd283e29bc3512c66dd14511c90d6c1367cfd5b2829da89018a25ac38bd8632

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 == 'revert': return d['label']
    if event == 'value': return d['value']
    if event == 'pointer': return not d['pointer_pending']
    if event == 'composition': return not d['composing']
    if event == 'exact': return d['exact_ids'][0] if len(d['exact_ids'])==1 else None
    if event == 'touched': return True
    if event == 'pending': return None
    if event == 'free-text-rejection': return {'resolved':d['value'] is not None,'free_text':None}
    if event == 'unresolved-validation': return {'invalid_draft':d['draft']!=d['label'],'candidate':None}
    if event == 'changed': return False
    return {'unchanged': True}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
normal = {'draft':'peach','value':'p1','label':'Pear','active':'p2','pointer_pending':True,'composing':True,'exact_ids':['p3','p4'],'query_epoch':N,'pending':'peach','touched':False}
boundary = {'draft':'','value':None,'label':'','active':None,'pointer_pending':False,'composing':False,'exact_ids':[''],'query_epoch':N,'pending':None,'touched':True}
check('normal revert', solve('revert', normal), 'Pear')
check('boundary revert', solve('revert', boundary), '')
check('normal value', solve('value', normal), 'p1')
check('boundary value', solve('value', boundary), None)
check('normal pointer', solve('pointer', normal), False)
check('boundary pointer', solve('pointer', boundary), True)
check('normal composition', solve('composition', normal), False)
check('boundary composition', solve('composition', boundary), True)
check('normal exact', solve('exact', normal), None)
check('boundary exact', solve('exact', boundary), '')
check('normal touched', solve('touched', normal), True)
check('boundary touched', solve('touched', boundary), True)
check('normal pending', solve('pending', normal), None)
check('boundary pending', solve('pending', boundary), None)
check('normal free-text-rejection', solve('free-text-rejection', normal), {'resolved':True,'free_text':None})
check('boundary free-text-rejection', solve('free-text-rejection', boundary), {'resolved':False,'free_text':None})
check('normal unresolved-validation', solve('unresolved-validation', normal), {'invalid_draft':True,'candidate':None})
check('boundary unresolved-validation', solve('unresolved-validation', boundary), {'invalid_draft':False,'candidate':None})
check('normal changed', solve('changed', normal), False)
check('boundary changed', solve('changed', boundary), False)
variant = dict(normal, **{'label':'L'*N})
check('variant query or selection payload', solve('revert', variant), 'L'*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 revert	`Pear`	`Pear`	Passed
boundary revert			Passed
normal value	`p1`	`p1`	Passed
boundary value	`None`	`None`	Passed
normal pointer	`False`	`False`	Passed
boundary pointer	`True`	`True`	Passed
normal composition	`False`	`False`	Passed
boundary composition	`True`	`True`	Passed
normal exact	`None`	`None`	Passed
boundary exact			Passed
normal touched	`True`	`True`	Passed
boundary touched	`True`	`True`	Passed
normal pending	`None`	`None`	Passed
boundary pending	`None`	`None`	Passed
normal free-text-rejection	`{'free_text': None, 'resolved': True}`	`{'free_text': None, 'resolved': True}`	Passed
boundary free-text-rejection	`{'free_text': None, 'resolved': False}`	`{'free_text': None, 'resolved': False}`	Passed
normal unresolved-validation	`{'candidate': None, 'invalid_draft': True}`	`{'candidate': None, 'invalid_draft': True}`	Passed
boundary unresolved-validation	`{'candidate': None, 'invalid_draft': False}`	`{'candidate': None, 'invalid_draft': False}`	Passed
normal changed	`False`	`False`	Passed
boundary changed	`False`	`False`	Passed
variant query or selection payload	`L`	`L`	Passed
unknown completion event	`{'unchanged': True}`	`{'unchanged': True}`	Passed

SHA-256 / 818133182f73b0899f627a02617f5229006c28cf27444e1a7ae9aba1a8f916d2

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 2026-09-29T14:40:46.183136+00:00.

Case digest / b802df5ccf9a169f385ae0f775300ca09bb06cfd1994ef241bbd150ca6ae789e