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rose-ash/lib/js/test262-scoreboard.md
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js-on-sx: String fixes — fromCodePoint, multi-arg indexOf/split/lastIndexOf, matchAll, constructor, js-to-string dict
- String.fromCodePoint added (BMP + surrogate pairs)
- indexOf/lastIndexOf/split now accept optional second argument (fromIndex / limit)
- matchAll stub added to js-string-method and String.prototype
- String property else-branch now falls back to String.prototype (fixes 'a'.constructor === String)
- js-to-string for dict returns [object Object] instead of recursing into circular String.prototype.constructor structure
- js-list-take helper added for split limit

Scoreboard: String 42→43, timeouts 32→13, total 162→202/300 (54%→67.3%). 529/530 unit, 148/148 slice.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-04-25 13:41:58 +00:00

1.3 KiB

test262 scoreboard

Pinned commit: d5e73fc8d2c663554fb72e2380a8c2bc1a318a33 Wall time: 102.4s

Total: 202/300 runnable passed (67.3%). Raw: pass=202 fail=85 skip=1597 timeout=13 total=1897.

Top failure modes

  • 78x Test262Error (assertion failed)
  • 13x Timeout
  • 3x TypeError: not a function
  • 1x ReferenceError (undefined symbol)
  • 1x SyntaxError (parse/unsupported syntax)
  • 1x Unhandled: Not callable: \\
  • 1x Unhandled: js-transpile-binop: unsupported op: >>>\

Categories (worst pass-rate first, min 10 runnable)

Category Pass Fail Skip Timeout Total Pass %
built-ins/String 43 49 1123 8 1223 43.0%
built-ins/Number 77 19 240 4 340 77.0%
built-ins/Math 82 17 227 1 327 82.0%

Per-category top failures (min 10 runnable, worst first)

built-ins/String (43/100 — 43.0%)

  • 42x Test262Error (assertion failed)
  • 8x Timeout
  • 3x TypeError: not a function
  • 1x ReferenceError (undefined symbol)
  • 1x SyntaxError (parse/unsupported syntax)

built-ins/Number (77/100 — 77.0%)

  • 19x Test262Error (assertion failed)
  • 4x Timeout

built-ins/Math (82/100 — 82.0%)

  • 17x Test262Error (assertion failed)
  • 1x Timeout