FA-32566 / Menu interactions / Open access

A self-owning submenu bypasses cycle validation · case 01

A self-owning submenu bypasses cycle validation.

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

ROOT CAUSE

The submenu-definition model applies `False` at its self-cycle operation instead of the stipulated transformation.

VERIFIED REPAIR

Apply `any(x['id']==x['parent'] for x in p)` at self-cycle.

Unsuccessful approach: The attempted repair `all(x['id']==x['parent'] for x in p)` still violates the self-cycle oracle.

Case contract

Menu definitions validate presentation identity separately from semantic command identity. Split-menu defaults belong to immediate command children; ancestry and depth remain bounded.

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 == 'roots':
        return [x['id'] for x in p if x['parent'] is None]
    if action == 'children':
        return [x['id'] for x in p['nodes'] if x['parent']==p['parent']]
    if action == 'split-default':
        return p['default'] in [x['command'] for x in p['children'] if x['kind']=='command']
    if action == 'self-cycle':
        return False
    if action == 'presentation-ids':
        return len({x['row'] for x in p})==len(p)
    if action == 'depth-budget':
        return p['depth']+p['incoming']<=p['limit']
    return {'error': 'unsupported menu operation'}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('roots contract', solve('roots', [{'id':0,'parent':None},{'id':N,'parent':0}]), [0])
check('children contract', solve('children', {'parent':'a','nodes':[{'id':N,'parent':'a'},{'id':N+1,'parent':'b'}]}), [N])
check('split-default contract', solve('split-default', {'default':'remote'+str(N),'registry':['remote'+str(N)],'children':[{'kind':'submenu','descendants':['remote'+str(N)]}]}), False)
check('self-cycle contract', solve('self-cycle', [{'id':N,'parent':N},{'id':N+1,'parent':None}]), True)
check('presentation-ids contract', solve('presentation-ids', [{'row':N,'command':'copy','label':'Copy'},{'row':N+1,'command':'copy','label':'Copy'}]), True)
check('depth-budget contract', solve('depth-budget', {'depth':N+2,'incoming':4,'limit':N+4}), False)
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
roots contract	`[0]`	`[0]`	Passed
children contract	`[1]`	`[1]`	Passed
split-default contract	`False`	`False`	Passed
self-cycle contract	`False`	`True`	Failed
presentation-ids contract	`True`	`True`	Passed
depth-budget contract	`False`	`False`	Passed
unknown operation	`{'error': 'unsupported menu operation'}`	`{'error': 'unsupported menu operation'}`	Passed

SHA-256 / 2438bf105931eead04f03df12adaf3c0e2eb072a402404a5d70be5843c71e96d

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 == 'roots':
        return [x['id'] for x in p if x['parent'] is None]
    if action == 'children':
        return [x['id'] for x in p['nodes'] if x['parent']==p['parent']]
    if action == 'split-default':
        return p['default'] in [x['command'] for x in p['children'] if x['kind']=='command']
    if action == 'self-cycle':
        return all(x['id']==x['parent'] for x in p)
    if action == 'presentation-ids':
        return len({x['row'] for x in p})==len(p)
    if action == 'depth-budget':
        return p['depth']+p['incoming']<=p['limit']
    return {'error': 'unsupported menu operation'}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('roots contract', solve('roots', [{'id':0,'parent':None},{'id':N,'parent':0}]), [0])
check('children contract', solve('children', {'parent':'a','nodes':[{'id':N,'parent':'a'},{'id':N+1,'parent':'b'}]}), [N])
check('split-default contract', solve('split-default', {'default':'remote'+str(N),'registry':['remote'+str(N)],'children':[{'kind':'submenu','descendants':['remote'+str(N)]}]}), False)
check('self-cycle contract', solve('self-cycle', [{'id':N,'parent':N},{'id':N+1,'parent':None}]), True)
check('presentation-ids contract', solve('presentation-ids', [{'row':N,'command':'copy','label':'Copy'},{'row':N+1,'command':'copy','label':'Copy'}]), True)
check('depth-budget contract', solve('depth-budget', {'depth':N+2,'incoming':4,'limit':N+4}), False)
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
roots contract	`[0]`	`[0]`	Passed
children contract	`[1]`	`[1]`	Passed
split-default contract	`False`	`False`	Passed
self-cycle contract	`False`	`True`	Failed
presentation-ids contract	`True`	`True`	Passed
depth-budget contract	`False`	`False`	Passed
unknown operation	`{'error': 'unsupported menu operation'}`	`{'error': 'unsupported menu operation'}`	Passed

SHA-256 / 1823ddcdb2ab8209b71fe7e3193476c828fe6d37cb2da5de95ccc429f8da40a7

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 == 'roots':
        return [x['id'] for x in p if x['parent'] is None]
    if action == 'children':
        return [x['id'] for x in p['nodes'] if x['parent']==p['parent']]
    if action == 'split-default':
        return p['default'] in [x['command'] for x in p['children'] if x['kind']=='command']
    if action == 'self-cycle':
        return any(x['id']==x['parent'] for x in p)
    if action == 'presentation-ids':
        return len({x['row'] for x in p})==len(p)
    if action == 'depth-budget':
        return p['depth']+p['incoming']<=p['limit']
    return {'error': 'unsupported menu operation'}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('roots contract', solve('roots', [{'id':0,'parent':None},{'id':N,'parent':0}]), [0])
check('children contract', solve('children', {'parent':'a','nodes':[{'id':N,'parent':'a'},{'id':N+1,'parent':'b'}]}), [N])
check('split-default contract', solve('split-default', {'default':'remote'+str(N),'registry':['remote'+str(N)],'children':[{'kind':'submenu','descendants':['remote'+str(N)]}]}), False)
check('self-cycle contract', solve('self-cycle', [{'id':N,'parent':N},{'id':N+1,'parent':None}]), True)
check('presentation-ids contract', solve('presentation-ids', [{'row':N,'command':'copy','label':'Copy'},{'row':N+1,'command':'copy','label':'Copy'}]), True)
check('depth-budget contract', solve('depth-budget', {'depth':N+2,'incoming':4,'limit':N+4}), False)
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
roots contract	`[0]`	`[0]`	Passed
children contract	`[1]`	`[1]`	Passed
split-default contract	`False`	`False`	Passed
self-cycle contract	`True`	`True`	Passed
presentation-ids contract	`True`	`True`	Passed
depth-budget contract	`False`	`False`	Passed
unknown operation	`{'error': 'unsupported menu operation'}`	`{'error': 'unsupported menu operation'}`	Passed

SHA-256 / 87edc5470e1c55a26ad5390aef049f049534f836382f0a1d0c745b799c293acf

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 2026-09-29T14:42:13.512390+00:00.

Case digest / c39f67206d88180c407faf42dc37edafa4e23633646dde7bb7ee9cb93bfe2993