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rose-ash/lib/js/test262-scoreboard.md
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js-on-sx: js-div coerces divisor to inexact
(js-div 1 0) with rational integer literals throws "rational: division
by zero" instead of producing Infinity. Wrapped the divisor in
(exact->inexact ...) so integer-by-zero now returns inf/-inf/nan
matching JS semantics. Hit by the harness's _isSameValue +0/-0 check
which calls (js-div 1 a) on JS literal arguments.
built-ins/Number: 37/50 → 41/50. built-ins/String: 77/99.
conformance.sh: 148/148.
2026-05-07 18:35:29 +00:00

823 B

test262 scoreboard

Pinned commit: d5e73fc8d2c663554fb72e2380a8c2bc1a318a33 Wall time: 420.7s

Total: 77/99 runnable passed (77.8%). Raw: pass=77 fail=16 skip=1 timeout=6 total=100.

Top failure modes

  • 14x 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 77 16 1 6 100 77.8%

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

built-ins/String (77/99 — 77.8%)

  • 14x Test262Error (assertion failed)
  • 6x Timeout
  • 1x ReferenceError (undefined symbol)
  • 1x SyntaxError (parse/unsupported syntax)