FA-39306 / Tree accessibility / Open access

Nested tree event ownership: Editor boundary is scanned outside the owning row · case 01

Editor boundary is scanned outside the owning row produces the wrong hierarchical widget state in a regression fixture.

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

ROOT CAUSE

The nested-tree-boundary contract is violated at `d['path'][:next((i for i,x in enumerate(d['path']) if x[0]=='row'),len(d['path']))]` by replacing it with `d['path']`.

VERIFIED REPAIR

Restore `d['path'][:next((i for i,x in enumerate(d['path']) if x[0]=='row'),len(d['path']))]` at this fault site while retaining the other tree state decisions.

Unsuccessful approach: The partial repair `[]` still violates a boundary or preservation case.

Case contract

A nested tree handles row events only for its nearest owning tree. Composed event paths may contain row editors and embedded widgets. Editing-origin keys remain with the editor; handled child-tree events do not bubble into ancestor tree commands. Disabled rows suppress activation but still permit context inspection.

Why this case matters

Offline executable model of a hierarchical accessibility interaction; inputs are bounded and valid as stipulated. No browser, assistive technology, or normative ARIA conformance is claimed.

1 / The failure

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(d):
    nearest=next((x[1] for x in d['path'] if x[0]=='tree'),None)
    owned=nearest==d['tree']
    row=next((x[1] for x in d['path'] if x[0]=='row'),None)
    editor=any(x[0]=='editor' for x in d['path'])
    already=d['handled']
    command=owned and row in d['rows'] and not already and not editor
    activate=command and d['event']=='activate' and row not in d['disabled']
    inspect=command and d['event']=='inspect'
    stop=command and (activate or inspect)
    focus=row if activate else d['focus']
    return [owned,row,editor,activate,inspect,stop,focus]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = {1: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])], 2: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])], 3: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])], 4: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])], 5: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])]}
for label, data, expected in cases[N]:
    check(label, solve(data), expected)
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
inner activation	`[True, 'b', False, True, False, True, 'b']`	`[True, 'b', False, True, False, True, 'b']`	Passed
outer listener	`[False, 'b', False, False, False, False, 'a']`	`[False, 'b', False, False, False, False, 'a']`	Passed
editor origin	`[True, 'b', True, False, False, False, 'a']`	`[True, 'b', True, False, False, False, 'a']`	Passed
editor outside row	`[True, 'b', True, False, False, False, 'a']`	`[True, 'b', False, True, False, True, 'b']`	Failed
handled child	`[True, 'b', False, False, False, False, 'a']`	`[True, 'b', False, False, False, False, 'a']`	Passed
disabled activation	`[True, 'b', False, False, False, False, 'a']`	`[True, 'b', False, False, False, False, 'a']`	Passed
disabled inspect	`[True, 'b', False, False, True, True, 'a']`	`[True, 'b', False, False, True, True, 'a']`	Passed
unregistered row	`[True, 'b', False, False, False, False, 'a']`	`[True, 'b', False, False, False, False, 'a']`	Passed
other event	`[True, 'b', False, False, False, False, 'a']`	`[True, 'b', False, False, False, False, 'a']`	Passed

SHA-256 / 27aebdc25829afd204ff7be1f639b8c65beff30e62a23575306bd1ec9803f1cb

2 / The unsuccessful fix

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(d):
    nearest=next((x[1] for x in d['path'] if x[0]=='tree'),None)
    owned=nearest==d['tree']
    row=next((x[1] for x in d['path'] if x[0]=='row'),None)
    editor=any(x[0]=='editor' for x in [])
    already=d['handled']
    command=owned and row in d['rows'] and not already and not editor
    activate=command and d['event']=='activate' and row not in d['disabled']
    inspect=command and d['event']=='inspect'
    stop=command and (activate or inspect)
    focus=row if activate else d['focus']
    return [owned,row,editor,activate,inspect,stop,focus]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = {1: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])], 2: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])], 3: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])], 4: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])], 5: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])]}
for label, data, expected in cases[N]:
    check(label, solve(data), expected)
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
inner activation	`[True, 'b', False, True, False, True, 'b']`	`[True, 'b', False, True, False, True, 'b']`	Passed
outer listener	`[False, 'b', False, False, False, False, 'a']`	`[False, 'b', False, False, False, False, 'a']`	Passed
editor origin	`[True, 'b', False, True, False, True, 'b']`	`[True, 'b', True, False, False, False, 'a']`	Failed
editor outside row	`[True, 'b', False, True, False, True, 'b']`	`[True, 'b', False, True, False, True, 'b']`	Passed
handled child	`[True, 'b', False, False, False, False, 'a']`	`[True, 'b', False, False, False, False, 'a']`	Passed
disabled activation	`[True, 'b', False, False, False, False, 'a']`	`[True, 'b', False, False, False, False, 'a']`	Passed
disabled inspect	`[True, 'b', False, False, True, True, 'a']`	`[True, 'b', False, False, True, True, 'a']`	Passed
unregistered row	`[True, 'b', False, False, False, False, 'a']`	`[True, 'b', False, False, False, False, 'a']`	Passed
other event	`[True, 'b', False, False, False, False, 'a']`	`[True, 'b', False, False, False, False, 'a']`	Passed

SHA-256 / b81627c97fa1bf64af08a2e27c5161bf1b987f2218a53b45abd01fde58d5ed96

3 / The verified repair

Exit 0

"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(d):
    nearest=next((x[1] for x in d['path'] if x[0]=='tree'),None)
    owned=nearest==d['tree']
    row=next((x[1] for x in d['path'] if x[0]=='row'),None)
    editor=any(x[0]=='editor' for x in d['path'][:next((i for i,x in enumerate(d['path']) if x[0]=='row'),len(d['path']))])
    already=d['handled']
    command=owned and row in d['rows'] and not already and not editor
    activate=command and d['event']=='activate' and row not in d['disabled']
    inspect=command and d['event']=='inspect'
    stop=command and (activate or inspect)
    focus=row if activate else d['focus']
    return [owned,row,editor,activate,inspect,stop,focus]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = {1: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])], 2: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])], 3: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])], 4: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])], 5: [('inner activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('outer listener', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'outer', 'rows': ['outerrow'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [False, 'b', False, False, False, False, 'a']), ('editor origin', {'path': [['editor', 'e'], ['row', 'b'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', True, False, False, False, 'a']), ('editor outside row', {'path': [['row', 'b'], ['editor', 'outer'], ['tree', 'inner']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, True, False, True, 'b']), ('handled child', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': True, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled activation', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'activate', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('disabled inspect', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'inspect', 'disabled': ['b'], 'focus': 'a'}, [True, 'b', False, False, True, True, 'a']), ('unregistered row', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a'], 'handled': False, 'event': 'activate', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a']), ('other event', {'path': [['row', 'b'], ['tree', 'inner'], ['row', 'outerrow'], ['tree', 'outer']], 'tree': 'inner', 'rows': ['a', 'b', 'v0', 'v1', 'v2', 'v3', 'v4'], 'handled': False, 'event': 'hover', 'disabled': [], 'focus': 'a'}, [True, 'b', False, False, False, False, 'a'])]}
for label, data, expected in cases[N]:
    check(label, solve(data), expected)
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
inner activation	`[True, 'b', False, True, False, True, 'b']`	`[True, 'b', False, True, False, True, 'b']`	Passed
outer listener	`[False, 'b', False, False, False, False, 'a']`	`[False, 'b', False, False, False, False, 'a']`	Passed
editor origin	`[True, 'b', True, False, False, False, 'a']`	`[True, 'b', True, False, False, False, 'a']`	Passed
editor outside row	`[True, 'b', False, True, False, True, 'b']`	`[True, 'b', False, True, False, True, 'b']`	Passed
handled child	`[True, 'b', False, False, False, False, 'a']`	`[True, 'b', False, False, False, False, 'a']`	Passed
disabled activation	`[True, 'b', False, False, False, False, 'a']`	`[True, 'b', False, False, False, False, 'a']`	Passed
disabled inspect	`[True, 'b', False, False, True, True, 'a']`	`[True, 'b', False, False, True, True, 'a']`	Passed
unregistered row	`[True, 'b', False, False, False, False, 'a']`	`[True, 'b', False, False, False, False, 'a']`	Passed
other event	`[True, 'b', False, False, False, False, 'a']`	`[True, 'b', False, False, False, False, 'a']`	Passed

SHA-256 / a90fed347b1b044763a9d370ae0b503d4aa998b1e872213b45be68647eb573bc

Verification & scope

Synthetic deterministic hierarchical-widget data contract; not an implementation of a browser accessibility tree. 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 2026-09-29T14:43:19.937338+00:00.

Case digest / 4cde0a1037ccc94e7bdbc3beda94d3a36bcf57cd9db3ecf38bb8c2e3d14a263f