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rose-ash/lib/js/test262-scoreboard.md
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js-on-sx: String wrapper objects + number-to-string sci notation expansion
- js-to-string: return __js_string_value__ for String wrapper dicts
- js-loose-eq: coerce String wrapper objects to primitive before compare
- String.__callable__: set __js_string_value__ + length on 'this' when called as constructor
- js-expand-sci-notation: new helper converts mantissa+exp to decimal or integer form
- js-number-to-string: expand 1e-06→0.000001, 1e+06→1000000; fix 1e+21 (was 1e21)
- String test262 subset: 45→58/100

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-04-25 14:27:13 +00:00

1004 B

test262 scoreboard

Pinned commit: d5e73fc8d2c663554fb72e2380a8c2bc1a318a33 Wall time: 37.7s

Total: 58/100 runnable passed (58.0%). Raw: pass=58 fail=33 skip=1130 timeout=9 total=1230.

Top failure modes

  • 28x Test262Error (assertion failed)
  • 9x Timeout
  • 1x Unhandled: Not callable: \\
  • 1x ReferenceError (undefined symbol)
  • 1x SyntaxError (parse/unsupported syntax)
  • 1x TypeError: not a function
  • 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 58 33 1123 9 1223 58.0%

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

built-ins/String (58/100 — 58.0%)

  • 28x Test262Error (assertion failed)
  • 9x Timeout
  • 1x Unhandled: Not callable: \\
  • 1x ReferenceError (undefined symbol)
  • 1x SyntaxError (parse/unsupported syntax)