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rose-ash/lib/js/test262-scoreboard.md
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js-on-sx: Boolean(NaN) === false
js-to-boolean was returning true for NaN because NaN != 0 by IEEE
semantics — the (= v 0) test fell through to the truthy else.
Per ES, NaN is one of the falsy values. Added a
(js-number-is-nan v) clause.
built-ins/Boolean: 19/27 → 21/27. conformance.sh: 148/148.
2026-05-08 09:19:21 +00:00

635 B

test262 scoreboard

Pinned commit: d5e73fc8d2c663554fb72e2380a8c2bc1a318a33 Wall time: 110.0s

Total: 44/50 runnable passed (88.0%). Raw: pass=44 fail=3 skip=0 timeout=3 total=50.

Top failure modes

  • 3x Timeout
  • 3x Test262Error (assertion failed)

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

Category Pass Fail Skip Timeout Total Pass %
built-ins/Number 44 3 0 3 50 88.0%

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

built-ins/Number (44/50 — 88.0%)

  • 3x Timeout
  • 3x Test262Error (assertion failed)