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rose-ash/lib/js/test262-scoreboard.md
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js-on-sx: constructors carry __proto__ = Function.prototype
Object/Array/Number/String/Boolean had no __proto__, so
Function.prototype mutations were invisible to them. Added a
post-init (begin (dict-set! ...)) at the end of runtime.sx
that wires each constructor to js-function-global.prototype.
Combined with the recent Object.prototype fallback, the chain
now terminates correctly: ctor → Function.prototype → Object.prototype.
built-ins/Number: 41/50 → 42/50, built-ins/String: 75/99 → 78/99,
built-ins/Array: 12/45 → 13/45. conformance.sh: 148/148.
2026-05-07 20:14:15 +00:00

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# test262 scoreboard
Pinned commit: `d5e73fc8d2c663554fb72e2380a8c2bc1a318a33`
Wall time: 273.6s
**Total:** 78/99 runnable passed (78.8%). Raw: pass=78 fail=15 skip=1 timeout=6 total=100.
## Top failure modes
- **13x** 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 | 78 | 15 | 1 | 6 | 100 | 78.8% |
## Per-category top failures (min 10 runnable, worst first)
### built-ins/String (78/99 — 78.8%)
- **13x** Test262Error (assertion failed)
- **6x** Timeout
- **1x** ReferenceError (undefined symbol)
- **1x** SyntaxError (parse/unsupported syntax)