FA-32681 / Menu interactions / Open access

Pointer intent accepts points outside the submenu vertical band · case 01

Pointer intent accepts points outside the submenu vertical band.

Verified by executionVariant 1 · 9 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The pointer-intent-corridor model applies `p['y']>=p['top']` at its vertical-band operation instead of the stipulated transformation.

VERIFIED REPAIR

Apply `p['top']<=p['y']<=p['bottom']` at vertical-band.

Unsuccessful approach: The attempted repair `p['y']<=p['bottom']` still violates the vertical-band oracle.

Case contract

Submenu pointer intent uses signed direction, bounded time and a declared inclusive triangular corridor; unrelated pointer streams cannot renew it.

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 == 'direction':
        return (p['x']-p['previous'])*p['side']>0
    if action == 'expiry':
        return p['now']<p['deadline']
    if action == 'vertical-band':
        return p['y']>=p['top']
    if action == 'pointer-owner':
        return p['pointer']==p['owner']
    if action == 'deadline':
        return p['started']+p['budget']
    if action == 'distance':
        return abs(p['edge']-p['x'])<abs(p['edge']-p['previous'])
    return {'error': 'unsupported menu operation'}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('direction contract', solve('direction', {'x':N,'previous':N+2,'side':-1}), True)
check('expiry contract', solve('expiry', {'now':N+10,'deadline':N+10}), False)
check('vertical-band contract', solve('vertical-band', {'top':N+1,'bottom':N+4,'y':N}), False)
check('pointer-owner contract', solve('pointer-owner', {'pointer':N+1,'owner':N}), False)
check('deadline contract', solve('deadline', {'started':N,'now':N+5,'budget':10}), N+10)
check('distance contract', solve('distance', {'edge':N+10,'x':N,'previous':N+2}), False)
check('unknown operation', solve('unknown', {}), {'error': 'unsupported menu operation'})
check('away from left submenu',solve('direction',{'x':N+2,'previous':N,'side':-1}),False)
check('below submenu corridor',solve('vertical-band',{'top':N,'bottom':N+3,'y':N+4}),False)
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
direction contract	`True`	`True`	Passed
expiry contract	`False`	`False`	Passed
vertical-band contract	`False`	`False`	Passed
pointer-owner contract	`False`	`False`	Passed
deadline contract	`11`	`11`	Passed
distance contract	`False`	`False`	Passed
unknown operation	`{'error': 'unsupported menu operation'}`	`{'error': 'unsupported menu operation'}`	Passed
away from left submenu	`False`	`False`	Passed
below submenu corridor	`True`	`False`	Failed

SHA-256 / 1e7489ae882df7dc77cd3e998ce6fc189197b0f0ababf508cf2544f0ff3a90b9

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 == 'direction':
        return (p['x']-p['previous'])*p['side']>0
    if action == 'expiry':
        return p['now']<p['deadline']
    if action == 'vertical-band':
        return p['y']<=p['bottom']
    if action == 'pointer-owner':
        return p['pointer']==p['owner']
    if action == 'deadline':
        return p['started']+p['budget']
    if action == 'distance':
        return abs(p['edge']-p['x'])<abs(p['edge']-p['previous'])
    return {'error': 'unsupported menu operation'}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('direction contract', solve('direction', {'x':N,'previous':N+2,'side':-1}), True)
check('expiry contract', solve('expiry', {'now':N+10,'deadline':N+10}), False)
check('vertical-band contract', solve('vertical-band', {'top':N+1,'bottom':N+4,'y':N}), False)
check('pointer-owner contract', solve('pointer-owner', {'pointer':N+1,'owner':N}), False)
check('deadline contract', solve('deadline', {'started':N,'now':N+5,'budget':10}), N+10)
check('distance contract', solve('distance', {'edge':N+10,'x':N,'previous':N+2}), False)
check('unknown operation', solve('unknown', {}), {'error': 'unsupported menu operation'})
check('away from left submenu',solve('direction',{'x':N+2,'previous':N,'side':-1}),False)
check('below submenu corridor',solve('vertical-band',{'top':N,'bottom':N+3,'y':N+4}),False)
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
direction contract	`True`	`True`	Passed
expiry contract	`False`	`False`	Passed
vertical-band contract	`True`	`False`	Failed
pointer-owner contract	`False`	`False`	Passed
deadline contract	`11`	`11`	Passed
distance contract	`False`	`False`	Passed
unknown operation	`{'error': 'unsupported menu operation'}`	`{'error': 'unsupported menu operation'}`	Passed
away from left submenu	`False`	`False`	Passed
below submenu corridor	`False`	`False`	Passed

SHA-256 / ff2d25839063cc03a2f1be6d54376733f4e28a59efbf0dc82fd026db5c7f8e52

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 == 'direction':
        return (p['x']-p['previous'])*p['side']>0
    if action == 'expiry':
        return p['now']<p['deadline']
    if action == 'vertical-band':
        return p['top']<=p['y']<=p['bottom']
    if action == 'pointer-owner':
        return p['pointer']==p['owner']
    if action == 'deadline':
        return p['started']+p['budget']
    if action == 'distance':
        return abs(p['edge']-p['x'])<abs(p['edge']-p['previous'])
    return {'error': 'unsupported menu operation'}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('direction contract', solve('direction', {'x':N,'previous':N+2,'side':-1}), True)
check('expiry contract', solve('expiry', {'now':N+10,'deadline':N+10}), False)
check('vertical-band contract', solve('vertical-band', {'top':N+1,'bottom':N+4,'y':N}), False)
check('pointer-owner contract', solve('pointer-owner', {'pointer':N+1,'owner':N}), False)
check('deadline contract', solve('deadline', {'started':N,'now':N+5,'budget':10}), N+10)
check('distance contract', solve('distance', {'edge':N+10,'x':N,'previous':N+2}), False)
check('unknown operation', solve('unknown', {}), {'error': 'unsupported menu operation'})
check('away from left submenu',solve('direction',{'x':N+2,'previous':N,'side':-1}),False)
check('below submenu corridor',solve('vertical-band',{'top':N,'bottom':N+3,'y':N+4}),False)
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
direction contract	`True`	`True`	Passed
expiry contract	`False`	`False`	Passed
vertical-band contract	`False`	`False`	Passed
pointer-owner contract	`False`	`False`	Passed
deadline contract	`11`	`11`	Passed
distance contract	`False`	`False`	Passed
unknown operation	`{'error': 'unsupported menu operation'}`	`{'error': 'unsupported menu operation'}`	Passed
away from left submenu	`False`	`False`	Passed
below submenu corridor	`False`	`False`	Passed

SHA-256 / 86fb12e637e2cead1c76589bd11130aa21a86736c317c153afaa92b862401b1a

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 2026-09-29T14:42:14.592929+00:00.

Case digest / d75a8e8c716a439c2fadc8c18bda7100d3bf578c67d0ba737dd40babe7170b22