FA-32966 / Menu interactions / Open access

Submenu owner disappears when only a descendant matches · case 01

Submenu owner disappears when only a descendant matches.

Verified by executionVariant 1 · 7 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The filtered-menu-projection model applies `p['direct_match']` at its owner-match operation instead of the stipulated transformation.

VERIFIED REPAIR

Apply `p['direct_match'] or bool(p['descendant_matches'])` at owner-match.

Unsuccessful approach: The attempted repair `p['direct_match'] and bool(p['descendant_matches'])` still violates the owner-match oracle.

Case contract

Menu filtering retains matching leaves and required ancestor headers, counts only commands, and discards decorations orphaned by filtering.

Why this case matters

Cascading and context menus require coherent command and session state as content changes.

1 / The failure

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json
import math
import unicodedata
N = 1
observations = []
def solve(action, p):
    if action == 'ancestors':
        return sorted(set(p['matches']) | {a for x in p['matches'] for a in p['ancestors'][x]})
    if action == 'command-count':
        return sum(x['kind']=='command' for x in p)
    if action == 'disabled-match':
        return [x for x in p if x['matches']]
    if action == 'group-header':
        return [x for x in p['headers'] if x in p['surviving_groups']]
    if action == 'query-clear':
        return p['original']
    if action == 'owner-match':
        return p['direct_match']
    return {'error': 'unsupported menu operation'}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('ancestors contract', solve('ancestors', {'matches':['c'+str(N)],'ancestors':{'c'+str(N):['r','tools']}}), sorted(['c'+str(N),'r','tools']))
check('command-count contract', solve('command-count', [{'kind':'header'},{'kind':'command','id':N},{'kind':'separator'}]), 1)
check('disabled-match contract', solve('disabled-match', [{'matches':True,'enabled':False,'id':N},{'matches':False,'enabled':True,'id':N+1}]), [{'matches':True,'enabled':False,'id':N}])
check('group-header contract', solve('group-header', {'headers':['a','b'],'surviving_groups':['b','c'+str(N)]}), ['b'])
check('query-clear contract', solve('query-clear', {'original':list(range(N+3)),'filtered':[N]}), list(range(N+3)))
check('owner-match contract', solve('owner-match', {'direct_match':False,'descendant_matches':[N]}), True)
check('unknown operation', solve('unknown', {}), {'error': 'unsupported menu operation'})
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
ancestors contract	`['c1', 'r', 'tools']`	`['c1', 'r', 'tools']`	Passed
command-count contract	`1`	`1`	Passed
disabled-match contract	`[{'enabled': False, 'id': 1, 'matches': True}]`	`[{'enabled': False, 'id': 1, 'matches': True}]`	Passed
group-header contract	`['b']`	`['b']`	Passed
query-clear contract	`[0, 1, 2, 3]`	`[0, 1, 2, 3]`	Passed
owner-match contract	`False`	`True`	Failed
unknown operation	`{'error': 'unsupported menu operation'}`	`{'error': 'unsupported menu operation'}`	Passed

SHA-256 / 8fd4645b65b215be85793b254908490bb5c3a0b1136c968c60c7735a6134b030

2 / The unsuccessful fix

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json
import math
import unicodedata
N = 1
observations = []
def solve(action, p):
    if action == 'ancestors':
        return sorted(set(p['matches']) | {a for x in p['matches'] for a in p['ancestors'][x]})
    if action == 'command-count':
        return sum(x['kind']=='command' for x in p)
    if action == 'disabled-match':
        return [x for x in p if x['matches']]
    if action == 'group-header':
        return [x for x in p['headers'] if x in p['surviving_groups']]
    if action == 'query-clear':
        return p['original']
    if action == 'owner-match':
        return p['direct_match'] and bool(p['descendant_matches'])
    return {'error': 'unsupported menu operation'}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('ancestors contract', solve('ancestors', {'matches':['c'+str(N)],'ancestors':{'c'+str(N):['r','tools']}}), sorted(['c'+str(N),'r','tools']))
check('command-count contract', solve('command-count', [{'kind':'header'},{'kind':'command','id':N},{'kind':'separator'}]), 1)
check('disabled-match contract', solve('disabled-match', [{'matches':True,'enabled':False,'id':N},{'matches':False,'enabled':True,'id':N+1}]), [{'matches':True,'enabled':False,'id':N}])
check('group-header contract', solve('group-header', {'headers':['a','b'],'surviving_groups':['b','c'+str(N)]}), ['b'])
check('query-clear contract', solve('query-clear', {'original':list(range(N+3)),'filtered':[N]}), list(range(N+3)))
check('owner-match contract', solve('owner-match', {'direct_match':False,'descendant_matches':[N]}), True)
check('unknown operation', solve('unknown', {}), {'error': 'unsupported menu operation'})
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
ancestors contract	`['c1', 'r', 'tools']`	`['c1', 'r', 'tools']`	Passed
command-count contract	`1`	`1`	Passed
disabled-match contract	`[{'enabled': False, 'id': 1, 'matches': True}]`	`[{'enabled': False, 'id': 1, 'matches': True}]`	Passed
group-header contract	`['b']`	`['b']`	Passed
query-clear contract	`[0, 1, 2, 3]`	`[0, 1, 2, 3]`	Passed
owner-match contract	`False`	`True`	Failed
unknown operation	`{'error': 'unsupported menu operation'}`	`{'error': 'unsupported menu operation'}`	Passed

SHA-256 / d4a39aca6a024bdd590bc377d945ef309ba2e759081db07ddc1741e752705c93

3 / The verified repair

Exit 0

"""Failure Map reference implementation. Python standard library only."""
import json
import math
import unicodedata
N = 1
observations = []
def solve(action, p):
    if action == 'ancestors':
        return sorted(set(p['matches']) | {a for x in p['matches'] for a in p['ancestors'][x]})
    if action == 'command-count':
        return sum(x['kind']=='command' for x in p)
    if action == 'disabled-match':
        return [x for x in p if x['matches']]
    if action == 'group-header':
        return [x for x in p['headers'] if x in p['surviving_groups']]
    if action == 'query-clear':
        return p['original']
    if action == 'owner-match':
        return p['direct_match'] or bool(p['descendant_matches'])
    return {'error': 'unsupported menu operation'}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('ancestors contract', solve('ancestors', {'matches':['c'+str(N)],'ancestors':{'c'+str(N):['r','tools']}}), sorted(['c'+str(N),'r','tools']))
check('command-count contract', solve('command-count', [{'kind':'header'},{'kind':'command','id':N},{'kind':'separator'}]), 1)
check('disabled-match contract', solve('disabled-match', [{'matches':True,'enabled':False,'id':N},{'matches':False,'enabled':True,'id':N+1}]), [{'matches':True,'enabled':False,'id':N}])
check('group-header contract', solve('group-header', {'headers':['a','b'],'surviving_groups':['b','c'+str(N)]}), ['b'])
check('query-clear contract', solve('query-clear', {'original':list(range(N+3)),'filtered':[N]}), list(range(N+3)))
check('owner-match contract', solve('owner-match', {'direct_match':False,'descendant_matches':[N]}), True)
check('unknown operation', solve('unknown', {}), {'error': 'unsupported menu operation'})
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
ancestors contract	`['c1', 'r', 'tools']`	`['c1', 'r', 'tools']`	Passed
command-count contract	`1`	`1`	Passed
disabled-match contract	`[{'enabled': False, 'id': 1, 'matches': True}]`	`[{'enabled': False, 'id': 1, 'matches': True}]`	Passed
group-header contract	`['b']`	`['b']`	Passed
query-clear contract	`[0, 1, 2, 3]`	`[0, 1, 2, 3]`	Passed
owner-match contract	`True`	`True`	Passed
unknown operation	`{'error': 'unsupported menu operation'}`	`{'error': 'unsupported menu operation'}`	Passed

SHA-256 / 0cadb09f912e2d5e1edf70d8815b74b125ad513577df7c2cfe0523bd3e5a6c7d

Verification & scope

Offline supplied-valid-payload model; excludes DOM, keyboard, focus, selection, announcements and browser conformance. 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 2026-09-29T14:42:17.625813+00:00.

Case digest / 128e7d3f8eeec520582013bd435fd333628a6756b39593ab90240afd63c02780