`createAsyncFromSyncIterator(x)` which is used in
`ReadableStream.from()` expects `x` as `Iterable` but, previous
implements specify `Iterator` or `IterableIterator`. If it was
`IterableIterator`, it would work, but if it was `Iterator`, an
exception will occur.
Tests have been merged into WPT.
https://github.com/web-platform-tests/wpt/pull/46365
---------
Co-authored-by: Asher Gomez <ashersaupingomez@gmail.com>
If `@@asyncIterator` is `null` or `undefined`, it should ignores and
fallback to `@@iterator`.
Tests have been merged into WPT.
https://github.com/web-platform-tests/wpt/pull/46374
The proposal of `ReadableStream.from` uses TC39 [GetIterator][] and
[GetMethod][] within it.
GetMethod treats null as undefined.
So if `@@asyncIterator` is `null` it should be ignored and fallback to
`@@iterator`.
[GetIterator]: https://tc39.es/ecma262/#sec-getiterator
[GetMethod]: https://tc39.es/ecma262/#sec-getmethod
```bash
> deno eval "ReadableStream.from({ [Symbol.asyncIterator]: null, [Symbol.iterator]: () => ({ next: () => ({ done: true }) }) }).pipeTo(new WritableStream())"
error: Uncaught (in promise) TypeError: obj[SymbolAsyncIterator] is not a function
ReadableStream.from({ [Symbol.asyncIterator]: null, [Symbol.iterator]: () => ({ next: () => ({ done: true }) }) }).pipeTo(new WritableStream())
^
at getIterator (ext:deno_web/06_streams.js:5105:38)
at Function.from (ext:deno_web/06_streams.js:5207:22)
at file:///D:/work/js/deno/tests/wpt/suite/$deno$eval:1:16
```
---------
Co-authored-by: Asher Gomez <ashersaupingomez@gmail.com>
Construct a new module graph container for workers instead of sharing it
with the main worker.
Fixes#17248Fixes#23461
---------
Co-authored-by: David Sherret <dsherret@gmail.com>
It's best that this only gets merged with the latest version of the
suite, so there's little difference between the `ci` and `wpt_epoch`
workflows. This should make troubleshooting easier.
