Response implementation does not meet expectations

[2234839]

  const r= await new Response("500", {
    status: 500,
    headers: {
      "Content-Type": "text/plain",
    },
  }).body;
  console.log("[r]", r); 

This is supposed to be ReadableStream, but now it's undefined

[saghul]

Yep, this is known as the current fetch polyfill in use if not great. I'm working oon replacing it with something better.