giles a7665a7b25 js-on-sx: js-display filter to format JS values without leaking internals ...

The OCaml epoch-protocol printer serializes raw SX dicts. JS object literals
now carry __proto__ / __js_order__ bookkeeping that points into Object.prototype,
a complex dict containing lambdas that close over Object — the printer
recurses indefinitely and hangs.

js-display walks the value once, dropping any dict key that matches the
__name__ dunder convention. js-eval calls it on its return value so the
output is the user-facing shape only. Restores 587/593 passing (up from
191/593 post-merge and 492/585 pre-merge) — the surviving 6 failures are
legitimate pre-existing test mismatches (illegal return/break/continue,
parseFloat float vs rational, escaped backtick).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-13 08:38:47 +00:00

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