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rose-ash/lib/js/test262-scoreboard.md
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js-on-sx: bail out of array set/length at 2^32-1 instead of padding
arr[4294967295] = 'x' and arr.length = 4294967295 were padding
the SX list with js-undefined for ~4 billion entries — instant
timeout. Per ES spec, indices >= 2^32-1 aren't array indices
anyway (regular properties, which we can't store on lists).
Added (>= i 4294967295) bail clauses to js-list-set! and the
length setter.
built-ins/Array: 21/45 → 23/45 (5 timeouts → 2).
conformance.sh: 148/148.
2026-05-08 05:31:50 +00:00

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# test262 scoreboard
Pinned commit: `d5e73fc8d2c663554fb72e2380a8c2bc1a318a33`
Wall time: 51.3s
**Total:** 23/45 runnable passed (51.1%). Raw: pass=23 fail=20 skip=5 timeout=2 total=50.
## Top failure modes
- **17x** Test262Error (assertion failed)
- **2x** TypeError: not a function
- **2x** Timeout
- **1x** Unhandled: Not callable: {:2 43 :1 42 :0 41 :length 3}\
## Categories (worst pass-rate first, min 10 runnable)
| Category | Pass | Fail | Skip | Timeout | Total | Pass % |
|---|---:|---:|---:|---:|---:|---:|
| built-ins/Array | 23 | 20 | 5 | 2 | 50 | 51.1% |
## Per-category top failures (min 10 runnable, worst first)
### built-ins/Array (23/45 — 51.1%)
- **17x** Test262Error (assertion failed)
- **2x** TypeError: not a function
- **2x** Timeout
- **1x** Unhandled: Not callable: {:2 43 :1 42 :0 41 :length 3}\