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Chris Tate
f12a2b2a23
A JavaScript ReadableStream given to Response, Request or fetch as a body
was converted to the string "[object ReadableStream]". The fetch unit now
reads such a stream through a reader of its own. A locked or disturbed
stream gives Node's TypeError, and the chunks must be Uint8Array
when the body is consumed ("Received non-Uint8Array chunk").
instanceof against a web stream class held in a variable or passed as an
argument walked no prototype for handles and answered false. It now starts
at the class prototype of the handle. The fetch unit's own streams, readers
and controllers, such as Response.body, are instances of the JavaScript
classes, so `response.body instanceof ReadableStream` is true again.
These paths, and the fetch reader functions' hand-off to web stream
readers, are in SCR_HANDLE_CLASSES variants of scr_json.c and scr_fetch.c,
which only programs with JavaScript web streams link; other programs that
use fetch build to the same size as on main.