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rose-ash/lib/js/test262-scoreboard.md
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js-on-sx: JS functions accept extra args silently
SX strictly arity-checks lambdas; JS allows passing more args than
declared (extras accessible via arguments). Was raising "f expects
1 args, got 2" whenever Array.from passed (value, index) to a
1-arg mapFn. Fixed in js-build-param-list: every JS param list
now ends with &rest __extra_args__ unless an explicit rest is
present, so extras are silently absorbed.
conformance.sh: 148/148.
2026-05-08 06:36:54 +00:00

823 B

test262 scoreboard

Pinned commit: d5e73fc8d2c663554fb72e2380a8c2bc1a318a33 Wall time: 154.6s

Total: 80/99 runnable passed (80.8%). Raw: pass=80 fail=13 skip=1 timeout=6 total=100.

Top failure modes

  • 11x Test262Error (assertion failed)
  • 6x Timeout
  • 1x ReferenceError (undefined symbol)
  • 1x SyntaxError (parse/unsupported syntax)

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

Category Pass Fail Skip Timeout Total Pass %
built-ins/String 80 13 1 6 100 80.8%

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

built-ins/String (80/99 — 80.8%)

  • 11x Test262Error (assertion failed)
  • 6x Timeout
  • 1x ReferenceError (undefined symbol)
  • 1x SyntaxError (parse/unsupported syntax)