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rose-ash/lib/js/test262-scoreboard.md
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js-on-sx: wrapper constructor-detection, Array.prototype.toString, >>> operator
Number.__callable__ and String.__callable__ now check this.__proto__ ===
Number/String.prototype before writing wrapper slots, preventing false-positive
mutation when called as plain function. js-to-number extended to unwrap
wrapper dicts and call valueOf/toString for plain objects. Array.prototype.toString
replaced with a direct js-list-join implementation (eliminates infinite recursion
via js-invoke-method on dict-based arrays). >>> added to transpiler + runtime.

String test262 subset: 62→66/100. 529/530 unit, 147/148 slice.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-04-25 19:22:53 +00:00

931 B

test262 scoreboard

Pinned commit: d5e73fc8d2c663554fb72e2380a8c2bc1a318a33 Wall time: 157.9s

Total: 66/100 runnable passed (66.0%). Raw: pass=66 fail=25 skip=1130 timeout=9 total=1230.

Top failure modes

  • 14x Test262Error (assertion failed)
  • 9x Timeout
  • 6x TypeError: not a function
  • 2x ReferenceError (undefined symbol)
  • 2x Unhandled: Not callable: \\
  • 1x SyntaxError (parse/unsupported syntax)

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

Category Pass Fail Skip Timeout Total Pass %
built-ins/String 66 25 1123 9 1223 66.0%

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

built-ins/String (66/100 — 66.0%)

  • 14x Test262Error (assertion failed)
  • 9x Timeout
  • 6x TypeError: not a function
  • 2x ReferenceError (undefined symbol)
  • 2x Unhandled: Not callable: \\