{"abstract":"Punctuation inside an override keeps its own class.","category":"Bidirectional text layout","checks":8,"contract":"Input [classes, paragraph level, max depth]. RLE/RLO push the next odd level, LRE/LRO the next even level (RLO/LRO set an R/L override, RLE/LRE clear it) if the level <= max depth and no overflow is pending, else count an overflow. PDF first cancels an overflow, else pops if above the base. Codes get level \"x\" and class BN; other characters take the top level and the override class if any. Return [levels, classes].","contract_signature":"x","evaluation_group":"w2-bidirectional-text-layout-explicit-embeddings","failed_approach":"Exempting spaces still leaves override holes.","family":"w2-bidirectional-text-layout-explicit-embeddings-override-scope","id":"FA-80546","implementations":{"attempt":{"sha256":"3ecaccb90a643bd48352b19bd8aa1bb11b43b886057ea218812383e94e85d273","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    classes, para, max_depth = x\n    stack = [(para, None)]\n    overflow = 0\n    levels = []\n    types = []\n    for c in classes:\n        if c in ('RLE', 'LRE', 'RLO', 'LRO'):\n            cur = stack[-1][0]\n            if c in ('RLE', 'RLO'):\n                new = cur + 1 if cur % 2 == 0 else cur + 2\n            else:\n                new = cur + 2 if cur % 2 == 0 else cur + 1\n            if new <= max_depth and overflow == 0:\n                ovr = None if c in ('RLE', 'LRE') else ('R' if c == 'RLO' else 'L')\n                stack.append((new, ovr))\n            else:\n                overflow += 1\n            levels.append('x')\n            types.append('BN')\n        elif c == 'PDF':\n            if overflow > 0:\n                overflow -= 1\n            elif len(stack) > 1:\n                stack.pop()\n            levels.append('x')\n            types.append('BN')\n        else:\n            lv, ovr = stack[-1]\n            levels.append(lv)\n            types.append(ovr if ovr and c != 'WS' else c)\n    return [levels, types]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('override on neutrals', [['RLO', 'ON', 'L', 'WS'], 0, 6], [['x', 1, 1, 1], ['BN', 'R', 'R', 'R']]), ('regression: override scope', [['L', 'L', 'EN', 'EN', 'LRO', 'R', 'R', 'EN', 'EN', 'EN', 'WS', 'R'], 1, 2], [[1, 1, 1, 1, 'x', 2, 2, 2, 2, 2, 2, 2], ['L', 'L', 'EN', 'EN', 'BN', 'L', 'L', 'L', 'L', 'L', 'L', 'L']]), ('regression: override scope', [['RLO', 'PDF', 'RLO', 'L', 'L', 'WS', 'EN', 'PDF'], 0, 6], [['x', 'x', 'x', 1, 1, 1, 1, 'x'], ['BN', 'BN', 'BN', 'R', 'R', 'R', 'R', 'BN']]), ('regression: override scope', [['EN', 'PDF', 'RLE', 'RLO', 'WS', 'L', 'RLE', 'PDF'], 0, 5], [[0, 'x', 'x', 'x', 3, 3, 'x', 'x'], ['EN', 'BN', 'BN', 'BN', 'R', 'R', 'BN', 'BN']]), ('depth limit exactly reached', [['RLE', 'LRE', 'L', 'PDF', 'L'], 0, 2], [['x', 'x', 2, 'x', 1], ['BN', 'BN', 'L', 'BN', 'L']]), ('RLE from odd level', [['RLE', 'RLE', 'L'], 0, 6], [['x', 'x', 3], ['BN', 'BN', 'L']]), ('control layout', [['EN', 'R', 'L', 'R', 'PDF', 'L', 'R', 'RLE', 'RLE', 'RLE', 'LRO'], 0, 5], [[0, 0, 0, 0, 'x', 0, 0, 'x', 'x', 'x', 'x'], ['EN', 'R', 'L', 'R', 'BN', 'L', 'R', 'BN', 'BN', 'BN', 'BN']]), ('control layout', [['PDF', 'R', 'L', 'RLE', 'ON', 'PDF', 'ON', 'R', 'LRE', 'PDF', 'R'], 0, 5], [['x', 0, 0, 'x', 1, 'x', 0, 0, 'x', 'x', 0], ['BN', 'R', 'L', 'BN', 'ON', 'BN', 'ON', 'R', 'BN', 'BN', 'R']])], [('regression: override scope', [['RLO', 'ON', 'RLE', 'RLE', 'L', 'R'], 0, 4], [['x', 1, 'x', 'x', 3, 3], ['BN', 'R', 'BN', 'BN', 'L', 'R']]), ('regression: override scope', [['PDF', 'LRO', 'EN', 'WS', 'LRO', 'RLE'], 1, 6], [['x', 'x', 2, 2, 'x', 'x'], ['BN', 'BN', 'L', 'L', 'BN', 'BN']]), ('regression: override scope', [['RLE', 'LRO', 'L', 'WS', 'R', 'EN', 'EN', 'R', 'L', 'PDF', 'ON', 'L', 'ON'], 0, 6], [['x', 'x', 2, 2, 2, 2, 2, 2, 2, 'x', 1, 1, 1], ['BN', 'BN', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'BN', 'ON', 'L', 'ON']]), ('regression: override scope', [['RLO', 'WS', 'ON', 'R', 'RLE', 'ON', 'RLE', 'PDF', 'RLE', 'R', 'ON'], 0, 5], [['x', 1, 1, 1, 'x', 3, 'x', 'x', 'x', 5, 5], ['BN', 'R', 'R', 'R', 'BN', 'ON', 'BN', 'BN', 'BN', 'R', 'ON']]), ('override on neutrals', [['RLO', 'ON', 'L', 'WS'], 0, 6], [['x', 1, 1, 1], ['BN', 'R', 'R', 'R']]), ('RLE from odd level', [['RLE', 'RLE', 'L'], 0, 6], [['x', 'x', 3], ['BN', 'BN', 'L']]), ('control layout', [['R', 'LRE', 'R', 'R', 'ON', 'EN', 'RLE', 'ON'], 1, 3], [[1, 'x', 2, 2, 2, 2, 'x', 3], ['R', 'BN', 'R', 'R', 'ON', 'EN', 'BN', 'ON']]), ('control layout', [['RLE', 'R'], 1, 5], [['x', 3], ['BN', 'R']])], [('regression: override scope', [['RLE', 'LRO', 'LRE', 'LRE', 'WS', 'LRE', 'L', 'RLE', 'PDF', 'ON', 'L', 'PDF', 'L'], 0, 3], [['x', 'x', 'x', 'x', 2, 'x', 2, 'x', 'x', 2, 2, 'x', 2], ['BN', 'BN', 'BN', 'BN', 'L', 'BN', 'L', 'BN', 'BN', 'L', 'L', 'BN', 'L']]), ('regression: override scope', [['RLO', 'ON', 'RLE', 'RLE', 'L', 'R'], 0, 4], [['x', 1, 'x', 'x', 3, 3], ['BN', 'R', 'BN', 'BN', 'L', 'R']]), ('regression: override scope', [['EN', 'PDF', 'RLE', 'RLO', 'WS', 'L', 'RLE', 'PDF'], 0, 5], [[0, 'x', 'x', 'x', 3, 3, 'x', 'x'], ['EN', 'BN', 'BN', 'BN', 'R', 'R', 'BN', 'BN']]), ('regression: override scope', [['PDF', 'LRO', 'EN', 'WS', 'LRO', 'RLE'], 1, 6], [['x', 'x', 2, 2, 'x', 'x'], ['BN', 'BN', 'L', 'L', 'BN', 'BN']]), ('RLE from odd level', [['RLE', 'RLE', 'L'], 0, 6], [['x', 'x', 3], ['BN', 'BN', 'L']]), ('LRE from odd level', [['LRE', 'R'], 1, 6], [['x', 2], ['BN', 'R']]), ('control layout', [['LRE', 'PDF'], 0, 2], [['x', 'x'], ['BN', 'BN']]), ('control layout', [['R', 'L', 'ON', 'PDF', 'R', 'L', 'ON', 'LRE', 'RLE'], 0, 4], [[0, 0, 0, 'x', 0, 0, 0, 'x', 'x'], ['R', 'L', 'ON', 'BN', 'R', 'L', 'ON', 'BN', 'BN']])], [('regression: override scope', [['RLO', 'LRO', 'EN', 'LRE', 'LRE', 'L', 'L', 'RLE', 'ON', 'EN', 'L', 'ON'], 1, 5], [['x', 'x', 4, 'x', 'x', 4, 4, 'x', 4, 4, 4, 4], ['BN', 'BN', 'L', 'BN', 'BN', 'L', 'L', 'BN', 'L', 'L', 'L', 'L']]), ('regression: override scope', [['LRO', 'ON', 'RLE', 'L', 'ON', 'ON', 'PDF'], 1, 6], [['x', 2, 'x', 3, 3, 3, 'x'], ['BN', 'L', 'BN', 'L', 'ON', 'ON', 'BN']]), ('regression: override scope', [['PDF', 'EN', 'EN', 'R', 'L', 'R', 'L', 'RLO', 'EN', 'WS', 'PDF', 'PDF', 'ON'], 1, 5], [['x', 1, 1, 1, 1, 1, 1, 'x', 3, 3, 'x', 'x', 1], ['BN', 'EN', 'EN', 'R', 'L', 'R', 'L', 'BN', 'R', 'R', 'BN', 'BN', 'ON']]), ('regression: override scope', [['LRO', 'R', 'PDF', 'RLE', 'PDF', 'R', 'L', 'PDF', 'EN', 'ON', 'WS', 'LRO', 'WS', 'LRE'], 0, 5], [['x', 2, 'x', 'x', 'x', 0, 0, 'x', 0, 0, 0, 'x', 2, 'x'], ['BN', 'L', 'BN', 'BN', 'BN', 'R', 'L', 'BN', 'EN', 'ON', 'WS', 'BN', 'L', 'BN']]), ('depth limit exactly reached', [['RLE', 'LRE', 'L', 'PDF', 'L'], 0, 2], [['x', 'x', 2, 'x', 1], ['BN', 'BN', 'L', 'BN', 'L']]), ('override on neutrals', [['RLO', 'ON', 'L', 'WS'], 0, 6], [['x', 1, 1, 1], ['BN', 'R', 'R', 'R']]), ('control layout', [['EN', 'PDF', 'L', 'LRE', 'R', 'L', 'ON'], 0, 5], [[0, 'x', 0, 'x', 2, 2, 2], ['EN', 'BN', 'L', 'BN', 'R', 'L', 'ON']]), ('control layout', [['ON', 'LRO', 'EN'], 1, 2], [[1, 'x', 2], ['ON', 'BN', 'L']])], [('regression: override scope', [['R', 'RLO', 'ON', 'L', 'RLE', 'RLE'], 0, 3], [[0, 'x', 1, 1, 'x', 'x'], ['R', 'BN', 'R', 'R', 'BN', 'BN']]), ('regression: override scope', [['EN', 'L', 'ON', 'R', 'LRO', 'L', 'ON', 'WS', 'ON'], 1, 6], [[1, 1, 1, 1, 'x', 2, 2, 2, 2], ['EN', 'L', 'ON', 'R', 'BN', 'L', 'L', 'L', 'L']]), ('regression: override scope', [['PDF', 'LRO', 'EN', 'WS', 'LRO', 'RLE'], 1, 6], [['x', 'x', 2, 2, 'x', 'x'], ['BN', 'BN', 'L', 'L', 'BN', 'BN']]), ('override on neutrals', [['RLO', 'ON', 'L', 'WS'], 0, 6], [['x', 1, 1, 1], ['BN', 'R', 'R', 'R']]), ('LRE from odd level', [['LRE', 'R'], 1, 6], [['x', 2], ['BN', 'R']]), ('RLE from odd level', [['RLE', 'RLE', 'L'], 0, 6], [['x', 'x', 3], ['BN', 'BN', 'L']]), ('control layout', [['L', 'R', 'EN', 'LRO', 'L', 'LRE', 'L', 'L', 'L', 'L'], 0, 5], [[0, 0, 0, 'x', 2, 'x', 4, 4, 4, 4], ['L', 'R', 'EN', 'BN', 'L', 'BN', 'L', 'L', 'L', 'L']]), ('control layout', [['PDF', 'EN', 'ON', 'RLE', 'ON', 'PDF', 'WS', 'L', 'ON', 'EN', 'ON'], 0, 2], [['x', 0, 0, 'x', 1, 'x', 0, 0, 0, 0, 0], ['BN', 'EN', 'ON', 'BN', 'ON', 'BN', 'WS', 'L', 'ON', 'EN', 'ON']])]]\nfor label, args, expected in fixtures[N - 1]:\n    check(label, solve(args), 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":"f275dc2da73fa69a56e694db80b580e7f01b3faf08c44a4a4bbec27e0585a533","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    classes, para, max_depth = x\n    stack = [(para, None)]\n    overflow = 0\n    levels = []\n    types = []\n    for c in classes:\n        if c in ('RLE', 'LRE', 'RLO', 'LRO'):\n            cur = stack[-1][0]\n            if c in ('RLE', 'RLO'):\n                new = cur + 1 if cur % 2 == 0 else cur + 2\n            else:\n                new = cur + 2 if cur % 2 == 0 else cur + 1\n            if new <= max_depth and overflow == 0:\n                ovr = None if c in ('RLE', 'LRE') else ('R' if c == 'RLO' else 'L')\n                stack.append((new, ovr))\n            else:\n                overflow += 1\n            levels.append('x')\n            types.append('BN')\n        elif c == 'PDF':\n            if overflow > 0:\n                overflow -= 1\n            elif len(stack) > 1:\n                stack.pop()\n            levels.append('x')\n            types.append('BN')\n        else:\n            lv, ovr = stack[-1]\n            levels.append(lv)\n            types.append(ovr if ovr and c not in ('ON', 'WS') else c)\n    return [levels, types]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('override on neutrals', [['RLO', 'ON', 'L', 'WS'], 0, 6], [['x', 1, 1, 1], ['BN', 'R', 'R', 'R']]), ('regression: override scope', [['L', 'L', 'EN', 'EN', 'LRO', 'R', 'R', 'EN', 'EN', 'EN', 'WS', 'R'], 1, 2], [[1, 1, 1, 1, 'x', 2, 2, 2, 2, 2, 2, 2], ['L', 'L', 'EN', 'EN', 'BN', 'L', 'L', 'L', 'L', 'L', 'L', 'L']]), ('regression: override scope', [['RLO', 'PDF', 'RLO', 'L', 'L', 'WS', 'EN', 'PDF'], 0, 6], [['x', 'x', 'x', 1, 1, 1, 1, 'x'], ['BN', 'BN', 'BN', 'R', 'R', 'R', 'R', 'BN']]), ('regression: override scope', [['EN', 'PDF', 'RLE', 'RLO', 'WS', 'L', 'RLE', 'PDF'], 0, 5], [[0, 'x', 'x', 'x', 3, 3, 'x', 'x'], ['EN', 'BN', 'BN', 'BN', 'R', 'R', 'BN', 'BN']]), ('depth limit exactly reached', [['RLE', 'LRE', 'L', 'PDF', 'L'], 0, 2], [['x', 'x', 2, 'x', 1], ['BN', 'BN', 'L', 'BN', 'L']]), ('RLE from odd level', [['RLE', 'RLE', 'L'], 0, 6], [['x', 'x', 3], ['BN', 'BN', 'L']]), ('control layout', [['EN', 'R', 'L', 'R', 'PDF', 'L', 'R', 'RLE', 'RLE', 'RLE', 'LRO'], 0, 5], [[0, 0, 0, 0, 'x', 0, 0, 'x', 'x', 'x', 'x'], ['EN', 'R', 'L', 'R', 'BN', 'L', 'R', 'BN', 'BN', 'BN', 'BN']]), ('control layout', [['PDF', 'R', 'L', 'RLE', 'ON', 'PDF', 'ON', 'R', 'LRE', 'PDF', 'R'], 0, 5], [['x', 0, 0, 'x', 1, 'x', 0, 0, 'x', 'x', 0], ['BN', 'R', 'L', 'BN', 'ON', 'BN', 'ON', 'R', 'BN', 'BN', 'R']])], [('regression: override scope', [['RLO', 'ON', 'RLE', 'RLE', 'L', 'R'], 0, 4], [['x', 1, 'x', 'x', 3, 3], ['BN', 'R', 'BN', 'BN', 'L', 'R']]), ('regression: override scope', [['PDF', 'LRO', 'EN', 'WS', 'LRO', 'RLE'], 1, 6], [['x', 'x', 2, 2, 'x', 'x'], ['BN', 'BN', 'L', 'L', 'BN', 'BN']]), ('regression: override scope', [['RLE', 'LRO', 'L', 'WS', 'R', 'EN', 'EN', 'R', 'L', 'PDF', 'ON', 'L', 'ON'], 0, 6], [['x', 'x', 2, 2, 2, 2, 2, 2, 2, 'x', 1, 1, 1], ['BN', 'BN', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'BN', 'ON', 'L', 'ON']]), ('regression: override scope', [['RLO', 'WS', 'ON', 'R', 'RLE', 'ON', 'RLE', 'PDF', 'RLE', 'R', 'ON'], 0, 5], [['x', 1, 1, 1, 'x', 3, 'x', 'x', 'x', 5, 5], ['BN', 'R', 'R', 'R', 'BN', 'ON', 'BN', 'BN', 'BN', 'R', 'ON']]), ('override on neutrals', [['RLO', 'ON', 'L', 'WS'], 0, 6], [['x', 1, 1, 1], ['BN', 'R', 'R', 'R']]), ('RLE from odd level', [['RLE', 'RLE', 'L'], 0, 6], [['x', 'x', 3], ['BN', 'BN', 'L']]), ('control layout', [['R', 'LRE', 'R', 'R', 'ON', 'EN', 'RLE', 'ON'], 1, 3], [[1, 'x', 2, 2, 2, 2, 'x', 3], ['R', 'BN', 'R', 'R', 'ON', 'EN', 'BN', 'ON']]), ('control layout', [['RLE', 'R'], 1, 5], [['x', 3], ['BN', 'R']])], [('regression: override scope', [['RLE', 'LRO', 'LRE', 'LRE', 'WS', 'LRE', 'L', 'RLE', 'PDF', 'ON', 'L', 'PDF', 'L'], 0, 3], [['x', 'x', 'x', 'x', 2, 'x', 2, 'x', 'x', 2, 2, 'x', 2], ['BN', 'BN', 'BN', 'BN', 'L', 'BN', 'L', 'BN', 'BN', 'L', 'L', 'BN', 'L']]), ('regression: override scope', [['RLO', 'ON', 'RLE', 'RLE', 'L', 'R'], 0, 4], [['x', 1, 'x', 'x', 3, 3], ['BN', 'R', 'BN', 'BN', 'L', 'R']]), ('regression: override scope', [['EN', 'PDF', 'RLE', 'RLO', 'WS', 'L', 'RLE', 'PDF'], 0, 5], [[0, 'x', 'x', 'x', 3, 3, 'x', 'x'], ['EN', 'BN', 'BN', 'BN', 'R', 'R', 'BN', 'BN']]), ('regression: override scope', [['PDF', 'LRO', 'EN', 'WS', 'LRO', 'RLE'], 1, 6], [['x', 'x', 2, 2, 'x', 'x'], ['BN', 'BN', 'L', 'L', 'BN', 'BN']]), ('RLE from odd level', [['RLE', 'RLE', 'L'], 0, 6], [['x', 'x', 3], ['BN', 'BN', 'L']]), ('LRE from odd level', [['LRE', 'R'], 1, 6], [['x', 2], ['BN', 'R']]), ('control layout', [['LRE', 'PDF'], 0, 2], [['x', 'x'], ['BN', 'BN']]), ('control layout', [['R', 'L', 'ON', 'PDF', 'R', 'L', 'ON', 'LRE', 'RLE'], 0, 4], [[0, 0, 0, 'x', 0, 0, 0, 'x', 'x'], ['R', 'L', 'ON', 'BN', 'R', 'L', 'ON', 'BN', 'BN']])], [('regression: override scope', [['RLO', 'LRO', 'EN', 'LRE', 'LRE', 'L', 'L', 'RLE', 'ON', 'EN', 'L', 'ON'], 1, 5], [['x', 'x', 4, 'x', 'x', 4, 4, 'x', 4, 4, 4, 4], ['BN', 'BN', 'L', 'BN', 'BN', 'L', 'L', 'BN', 'L', 'L', 'L', 'L']]), ('regression: override scope', [['LRO', 'ON', 'RLE', 'L', 'ON', 'ON', 'PDF'], 1, 6], [['x', 2, 'x', 3, 3, 3, 'x'], ['BN', 'L', 'BN', 'L', 'ON', 'ON', 'BN']]), ('regression: override scope', [['PDF', 'EN', 'EN', 'R', 'L', 'R', 'L', 'RLO', 'EN', 'WS', 'PDF', 'PDF', 'ON'], 1, 5], [['x', 1, 1, 1, 1, 1, 1, 'x', 3, 3, 'x', 'x', 1], ['BN', 'EN', 'EN', 'R', 'L', 'R', 'L', 'BN', 'R', 'R', 'BN', 'BN', 'ON']]), ('regression: override scope', [['LRO', 'R', 'PDF', 'RLE', 'PDF', 'R', 'L', 'PDF', 'EN', 'ON', 'WS', 'LRO', 'WS', 'LRE'], 0, 5], [['x', 2, 'x', 'x', 'x', 0, 0, 'x', 0, 0, 0, 'x', 2, 'x'], ['BN', 'L', 'BN', 'BN', 'BN', 'R', 'L', 'BN', 'EN', 'ON', 'WS', 'BN', 'L', 'BN']]), ('depth limit exactly reached', [['RLE', 'LRE', 'L', 'PDF', 'L'], 0, 2], [['x', 'x', 2, 'x', 1], ['BN', 'BN', 'L', 'BN', 'L']]), ('override on neutrals', [['RLO', 'ON', 'L', 'WS'], 0, 6], [['x', 1, 1, 1], ['BN', 'R', 'R', 'R']]), ('control layout', [['EN', 'PDF', 'L', 'LRE', 'R', 'L', 'ON'], 0, 5], [[0, 'x', 0, 'x', 2, 2, 2], ['EN', 'BN', 'L', 'BN', 'R', 'L', 'ON']]), ('control layout', [['ON', 'LRO', 'EN'], 1, 2], [[1, 'x', 2], ['ON', 'BN', 'L']])], [('regression: override scope', [['R', 'RLO', 'ON', 'L', 'RLE', 'RLE'], 0, 3], [[0, 'x', 1, 1, 'x', 'x'], ['R', 'BN', 'R', 'R', 'BN', 'BN']]), ('regression: override scope', [['EN', 'L', 'ON', 'R', 'LRO', 'L', 'ON', 'WS', 'ON'], 1, 6], [[1, 1, 1, 1, 'x', 2, 2, 2, 2], ['EN', 'L', 'ON', 'R', 'BN', 'L', 'L', 'L', 'L']]), ('regression: override scope', [['PDF', 'LRO', 'EN', 'WS', 'LRO', 'RLE'], 1, 6], [['x', 'x', 2, 2, 'x', 'x'], ['BN', 'BN', 'L', 'L', 'BN', 'BN']]), ('override on neutrals', [['RLO', 'ON', 'L', 'WS'], 0, 6], [['x', 1, 1, 1], ['BN', 'R', 'R', 'R']]), ('LRE from odd level', [['LRE', 'R'], 1, 6], [['x', 2], ['BN', 'R']]), ('RLE from odd level', [['RLE', 'RLE', 'L'], 0, 6], [['x', 'x', 3], ['BN', 'BN', 'L']]), ('control layout', [['L', 'R', 'EN', 'LRO', 'L', 'LRE', 'L', 'L', 'L', 'L'], 0, 5], [[0, 0, 0, 'x', 2, 'x', 4, 4, 4, 4], ['L', 'R', 'EN', 'BN', 'L', 'BN', 'L', 'L', 'L', 'L']]), ('control layout', [['PDF', 'EN', 'ON', 'RLE', 'ON', 'PDF', 'WS', 'L', 'ON', 'EN', 'ON'], 0, 2], [['x', 0, 0, 'x', 1, 'x', 0, 0, 0, 0, 0], ['BN', 'EN', 'ON', 'BN', 'ON', 'BN', 'WS', 'L', 'ON', 'EN', 'ON']])]]\nfor label, args, expected in fixtures[N - 1]:\n    check(label, solve(args), 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":"A deterministic toy bidi model over stipulated class labels and integer levels; it is inspired by, but does not claim conformance to, any published algorithm. 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":"w2-bidirectional-text-layout-explicit-embeddings-override-scope","generated_at":"2026-09-29T14:49:54.851723+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Mixed right-to-left and left-to-right text must resolve levels and visual order exactly, or words, numbers and carets land in the wrong place.","root_cause":"The override class is not applied to neutral characters.","sha256":"557ff3477b6d44905bed6ef2ea6bfc3bb5916785f1d750e105eb02041e7171aa","title":"Explicit embedding stack: override scope · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":42.089,"exit_code":1,"observations":[{"actual":[["x",1,1,1],["BN","R","R","WS"]],"check":"override on neutrals","expected":[["x",1,1,1],["BN","R","R","R"]],"passed":false},{"actual":[[1,1,1,1,"x",2,2,2,2,2,2,2],["L","L","EN","EN","BN","L","L","L","L","L","WS","L"]],"check":"regression: override scope","expected":[[1,1,1,1,"x",2,2,2,2,2,2,2],["L","L","EN","EN","BN","L","L","L","L","L","L","L"]],"passed":false},{"actual":[["x","x","x",1,1,1,1,"x"],["BN","BN","BN","R","R","WS","R","BN"]],"check":"regression: override scope","expected":[["x","x","x",1,1,1,1,"x"],["BN","BN","BN","R","R","R","R","BN"]],"passed":false},{"actual":[[0,"x","x","x",3,3,"x","x"],["EN","BN","BN","BN","WS","R","BN","BN"]],"check":"regression: override scope","expected":[[0,"x","x","x",3,3,"x","x"],["EN","BN","BN","BN","R","R","BN","BN"]],"passed":false},{"actual":[["x","x",2,"x",1],["BN","BN","L","BN","L"]],"check":"depth limit 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