scriptc

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Chris Tate e0c692593c Evaluate a for..of source beside never[] once, keep collection views through a second view, and combine typed promises in untyped JavaScript

- lowerForOfEmptyArrayArm binds the `Set | Map | string | never[]` source
  to a hidden local before the tag test, so a call or getter in the loop
  head runs once and the loop walks the value the test saw.
- markTarget marks a structural view as a collection view when its source
  is already one, and reruns the fixpoint when a view marked earlier
  becomes a collection view, so a Map or Set handed through two views keeps
  answering through the collection.
- Promise.all in a JavaScript source whose call types as Promise<any[]>
  (an unannotated parameter) runs the engine's Promise.all over the entries
  as checked-dynamic values when they are typed promises. A merged
  `Promise<number | string>[]` argument reaches that call since union
  promise arms merge.

Corpus 8419 and 6956 and the js-own-tostring npm fixture cover each case.

2026-10-28 20:22:14 -05:00

corpus

Evaluate a for..of source beside never[] once, keep collection views through a second view, and combine typed promises in untyped JavaScript

2026-10-28 20:22:14 -05:00

corpus-node-islands-order

Treat the zlib ordering program as a timer race

2026-10-28 01:47:01 -05:00

coverage-fixtures

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deadstrip

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diagnostics