{"abstract":"Branch completeness mistakes empty page or empty cursor for terminal produces the wrong hierarchical widget state in a regression fixture.","category":"Tree accessibility","checks":8,"contract":"A request is accepted only for a live open branch with matching epoch and token. Accepted pages replace a placeholder with deduplicated child IDs, clear busy/error state, and derive completeness from a next cursor. Rejected responses preserve all branch state.","evaluation_group":"s3-tree-lazy-request","failed_approach":"The partial repair `(not d['next']) if accept else d['complete']` still violates a boundary or preservation case.","family":"s3-tree_accessibility-lazy-request-07","id":"FA-38521","implementations":{"attempt":{"sha256":"ec2532579794085b8345114a99cae6b2bc564edf3d081901891b3785b24b0179","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(d):\n    match=d['reply_epoch']==d['epoch'] and d['reply_token']==d['token']\n    accept=match and d['live'] and d['open']\n    children=list(dict.fromkeys(d['reply'])) if accept else d['children']\n    busy=False if accept else d['busy']\n    error=None if accept else d['error']\n    cursor=d['next'] if accept else d['cursor']\n    complete=(not d['next']) if accept else d['complete']\n    placeholder=False if accept else d['placeholder']\n    token=None if accept else d['token']\n    focus=(children[0] if children else d['parent']) if accept and d['focus']=='placeholder' else d['focus']\n    return [children,busy,error,cursor,complete,placeholder,token,focus]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncases = {1: [('accepted', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 0, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0'], False, None, None, True, False, None, 'outside'])], 2: [('accepted', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 1, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0', 'c1'], False, None, None, True, False, None, 'outside'])], 3: [('accepted', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 2, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0', 'c1', 'c2'], False, None, None, True, False, None, 'outside'])], 4: [('accepted', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2', 'c3'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 3, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2', 'c3'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0', 'c1', 'c2', 'c3'], False, None, None, True, False, None, 'outside'])], 5: [('accepted', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2', 'c3', 'c4'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 4, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2', 'c3', 'c4'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0', 'c1', 'c2', 'c3', 'c4'], False, None, None, True, False, None, 'outside'])]}\nfor label, data, expected in cases[N]:\n    check(label, solve(data), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"5e78b6e906888517a17de8950eaeca0bdbaa8f83875758192e18d7f10ea4fb48","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(d):\n    match=d['reply_epoch']==d['epoch'] and d['reply_token']==d['token']\n    accept=match and d['live'] and d['open']\n    children=list(dict.fromkeys(d['reply'])) if accept else d['children']\n    busy=False if accept else d['busy']\n    error=None if accept else d['error']\n    cursor=d['next'] if accept else d['cursor']\n    complete=(not children) if accept else d['complete']\n    placeholder=False if accept else d['placeholder']\n    token=None if accept else d['token']\n    focus=(children[0] if children else d['parent']) if accept and d['focus']=='placeholder' else d['focus']\n    return [children,busy,error,cursor,complete,placeholder,token,focus]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncases = {1: [('accepted', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 0, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0'], False, None, None, True, False, None, 'outside'])], 2: [('accepted', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 1, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0', 'c1'], False, None, None, True, False, None, 'outside'])], 3: [('accepted', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 2, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0', 'c1', 'c2'], False, None, None, True, False, None, 'outside'])], 4: [('accepted', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2', 'c3'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 3, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2', 'c3'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0', 'c1', 'c2', 'c3'], False, None, None, True, False, None, 'outside'])], 5: [('accepted', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2', 'c3', 'c4'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 4, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2', 'c3', 'c4'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0', 'c1', 'c2', 'c3', 'c4'], False, None, None, True, False, None, 'outside'])]}\nfor label, data, expected in cases[N]:\n    check(label, solve(data), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"fixed":{"sha256":"1ecc9bb995dd535ec2c2ef3c7eb8af52ab37ca34c06032e7d4038de6bdee2d08","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(d):\n    match=d['reply_epoch']==d['epoch'] and d['reply_token']==d['token']\n    accept=match and d['live'] and d['open']\n    children=list(dict.fromkeys(d['reply'])) if accept else d['children']\n    busy=False if accept else d['busy']\n    error=None if accept else d['error']\n    cursor=d['next'] if accept else d['cursor']\n    complete=(d['next'] is None) if accept else d['complete']\n    placeholder=False if accept else d['placeholder']\n    token=None if accept else d['token']\n    focus=(children[0] if children else d['parent']) if accept and d['focus']=='placeholder' else d['focus']\n    return [children,busy,error,cursor,complete,placeholder,token,focus]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncases = {1: [('accepted', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 0, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 1, 'epoch': 1, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0'], False, None, None, True, False, None, 'outside'])], 2: [('accepted', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 1, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 2, 'epoch': 2, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0', 'c1'], False, None, None, True, False, None, 'outside'])], 3: [('accepted', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 2, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 3, 'epoch': 3, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0', 'c1', 'c2'], False, None, None, True, False, None, 'outside'])], 4: [('accepted', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2', 'c3'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 3, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2', 'c3'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 4, 'epoch': 4, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0', 'c1', 'c2', 'c3'], False, None, None, True, False, None, 'outside'])], 5: [('accepted', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2', 'c3', 'c4'], False, None, None, True, False, None, 'z']), ('old epoch', {'reply_epoch': 4, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('old token', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 'old', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('collapsed', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': False, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('deleted', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': False, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['old'], True, 'old-error', 'oldcursor', False, True, 't', 'placeholder']), ('empty terminal', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': [], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [[], False, None, None, True, False, None, 'p']), ('empty cursor', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': '', 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'placeholder'}, [['z', 'c0', 'c1', 'c2', 'c3', 'c4'], False, None, '', False, False, None, 'z']), ('focus elsewhere', {'reply_epoch': 5, 'epoch': 5, 'reply_token': 't', 'token': 't', 'live': True, 'open': True, 'reply': ['z', 'c0', 'c1', 'c2', 'c3', 'c4', 'z'], 'children': ['old'], 'busy': True, 'error': 'old-error', 'next': None, 'cursor': 'oldcursor', 'complete': False, 'placeholder': True, 'parent': 'p', 'focus': 'outside'}, [['z', 'c0', 'c1', 'c2', 'c3', 'c4'], False, None, None, True, False, None, 'outside'])]}\nfor label, data, expected in cases[N]:\n    check(label, solve(data), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":"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.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"s3-tree_accessibility-lazy-request-07","generated_at":"2026-09-29T14:43:12.043694+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"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.","repair":"Restore `(d['next'] is None) if accept else d['complete']` at this fault site while retaining the other tree state decisions.","root_cause":"The lazy-request contract is violated at `(d['next'] is None) if accept else d['complete']` by replacing it with `(not children) if accept else d['complete']`.","sha256":"750568c493bb5d83419c1c7322b2c36db07cd675340c659fd8f72232d5184e08","title":"Lazy tree branch request lifecycle: Branch completeness mistakes empty page or empty cursor for terminal · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":48.918,"exit_code":1,"observations":[{"actual":[["z","c0"],false,null,null,true,false,null,"z"],"check":"accepted","expected":[["z","c0"],false,null,null,true,false,null,"z"],"passed":true},{"actual":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"check":"old epoch","expected":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"passed":true},{"actual":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"check":"old token","expected":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"passed":true},{"actual":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"check":"collapsed","expected":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"passed":true},{"actual":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"check":"deleted","expected":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"passed":true},{"actual":[[],false,null,null,true,false,null,"p"],"check":"empty terminal","expected":[[],false,null,null,true,false,null,"p"],"passed":true},{"actual":[["z","c0"],false,null,"",true,false,null,"z"],"check":"empty cursor","expected":[["z","c0"],false,null,"",false,false,null,"z"],"passed":false},{"actual":[["z","c0"],false,null,null,true,false,null,"outside"],"check":"focus elsewhere","expected":[["z","c0"],false,null,null,true,false,null,"outside"],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"accepted\", \"actual\": [[\"z\", \"c0\"], false, null, null, true, false, null, \"z\"], \"expected\": [[\"z\", \"c0\"], false, null, null, true, false, null, \"z\"], \"passed\": true}, {\"check\": \"old epoch\", \"actual\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"expected\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"passed\": true}, {\"check\": \"old token\", \"actual\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"expected\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"passed\": true}, {\"check\": \"collapsed\", \"actual\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"expected\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"passed\": true}, {\"check\": \"deleted\", \"actual\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"expected\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"passed\": true}, {\"check\": \"empty terminal\", \"actual\": [[], false, null, null, true, false, null, \"p\"], \"expected\": [[], false, null, null, true, false, null, \"p\"], \"passed\": true}, {\"check\": \"empty cursor\", \"actual\": [[\"z\", \"c0\"], false, null, \"\", true, false, null, \"z\"], \"expected\": [[\"z\", \"c0\"], false, null, \"\", false, false, null, \"z\"], \"passed\": false}, {\"check\": \"focus elsewhere\", \"actual\": [[\"z\", \"c0\"], false, null, null, true, false, null, \"outside\"], \"expected\": [[\"z\", \"c0\"], false, null, null, true, false, null, \"outside\"], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":45.883,"exit_code":1,"observations":[{"actual":[["z","c0"],false,null,null,false,false,null,"z"],"check":"accepted","expected":[["z","c0"],false,null,null,true,false,null,"z"],"passed":false},{"actual":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"check":"old epoch","expected":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"passed":true},{"actual":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"check":"old token","expected":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"passed":true},{"actual":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"check":"collapsed","expected":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"passed":true},{"actual":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"check":"deleted","expected":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"passed":true},{"actual":[[],false,null,null,true,false,null,"p"],"check":"empty terminal","expected":[[],false,null,null,true,false,null,"p"],"passed":true},{"actual":[["z","c0"],false,null,"",false,false,null,"z"],"check":"empty cursor","expected":[["z","c0"],false,null,"",false,false,null,"z"],"passed":true},{"actual":[["z","c0"],false,null,null,false,false,null,"outside"],"check":"focus elsewhere","expected":[["z","c0"],false,null,null,true,false,null,"outside"],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"accepted\", \"actual\": [[\"z\", \"c0\"], false, null, null, false, false, null, \"z\"], \"expected\": [[\"z\", \"c0\"], false, null, null, true, false, null, \"z\"], \"passed\": false}, {\"check\": \"old epoch\", \"actual\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"expected\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"passed\": true}, {\"check\": \"old token\", \"actual\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"expected\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"passed\": true}, {\"check\": \"collapsed\", \"actual\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"expected\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"passed\": true}, {\"check\": \"deleted\", \"actual\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"expected\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"passed\": true}, {\"check\": \"empty terminal\", \"actual\": [[], false, null, null, true, false, null, \"p\"], \"expected\": [[], false, null, null, true, false, null, \"p\"], \"passed\": true}, {\"check\": \"empty cursor\", \"actual\": [[\"z\", \"c0\"], false, null, \"\", false, false, null, \"z\"], \"expected\": [[\"z\", \"c0\"], false, null, \"\", false, false, null, \"z\"], \"passed\": true}, {\"check\": \"focus elsewhere\", \"actual\": [[\"z\", \"c0\"], false, null, null, false, false, null, \"outside\"], \"expected\": [[\"z\", \"c0\"], false, null, null, true, false, null, \"outside\"], \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":49.112,"exit_code":0,"observations":[{"actual":[["z","c0"],false,null,null,true,false,null,"z"],"check":"accepted","expected":[["z","c0"],false,null,null,true,false,null,"z"],"passed":true},{"actual":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"check":"old epoch","expected":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"passed":true},{"actual":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"check":"old token","expected":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"passed":true},{"actual":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"check":"collapsed","expected":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"passed":true},{"actual":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"check":"deleted","expected":[["old"],true,"old-error","oldcursor",false,true,"t","placeholder"],"passed":true},{"actual":[[],false,null,null,true,false,null,"p"],"check":"empty terminal","expected":[[],false,null,null,true,false,null,"p"],"passed":true},{"actual":[["z","c0"],false,null,"",false,false,null,"z"],"check":"empty cursor","expected":[["z","c0"],false,null,"",false,false,null,"z"],"passed":true},{"actual":[["z","c0"],false,null,null,true,false,null,"outside"],"check":"focus elsewhere","expected":[["z","c0"],false,null,null,true,false,null,"outside"],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"accepted\", \"actual\": [[\"z\", \"c0\"], false, null, null, true, false, null, \"z\"], \"expected\": [[\"z\", \"c0\"], false, null, null, true, false, null, \"z\"], \"passed\": true}, {\"check\": \"old epoch\", \"actual\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"expected\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"passed\": true}, {\"check\": \"old token\", \"actual\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"expected\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"passed\": true}, {\"check\": \"collapsed\", \"actual\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"expected\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"passed\": true}, {\"check\": \"deleted\", \"actual\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"expected\": [[\"old\"], true, \"old-error\", \"oldcursor\", false, true, \"t\", \"placeholder\"], \"passed\": true}, {\"check\": \"empty terminal\", \"actual\": [[], false, null, null, true, false, null, \"p\"], \"expected\": [[], false, null, null, true, false, null, \"p\"], \"passed\": true}, {\"check\": \"empty cursor\", \"actual\": [[\"z\", \"c0\"], false, null, \"\", false, false, null, \"z\"], \"expected\": [[\"z\", \"c0\"], false, null, \"\", false, false, null, \"z\"], \"passed\": true}, {\"check\": \"focus elsewhere\", \"actual\": [[\"z\", \"c0\"], false, null, null, true, false, null, \"outside\"], \"expected\": [[\"z\", \"c0\"], false, null, null, true, false, null, \"outside\"], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}