Re: [whatwg/streams] Why does the `read` method of `ReadableStreamBYOBReader` class, need to _transfer_ the buffer it is provided? (Issue #1348)

BlackAsLight left a comment (whatwg/streams#1348)

> But if the ReadableStream implementation insists on calling `.transfer()`, then it can just throw/reject, no? No existing code would break, because today you can't pass a SharedArrayBuffer to `ReadableStreamBYOBReader.read` at all.

You have it backwards. Because you can't pass a SharedArrayBuffer to a byob stream currently, code can assume the buffer that's passed in is transferable and call `.transfer()` on it. It would break existing code that is relying on the fact that the buffer being passed in is in-fact transferable.

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