Race condition with ReadableStream

[Manouchehri]

I gave up trying to troubleshoot this one (I just switched to using an ArrayBuffer, I didn't really need to use a stream), but sometimes (not always) I get a race condition where the ReadableStream body is read twice.

✘ [ERROR] Uncaught (in response) TypeError: This ReadableStream is disturbed (has already been read from), and cannot be used as a body.


✘ [ERROR] Uncaught (in promise) TypeError: This ReadableStream is disturbed (has already been read from), and cannot be used as a body.

  return new Request(signed.url.toString(), Object.assign({ duplex: 'half' }, signed))
         ^
      at sign

I don't know if 169db6f is related (my guess is not).

Mainly documenting this for others in the future.