cloning byte readablestream causes process to hang

[KhafraDev]

Version

v21.6.2

Platform

n/a

Subsystem

webstreams

What steps will reproduce the bug?

function cloneBody (body) {
  const [out1, out2] = body.stream.tee()
  const out2Clone = structuredClone(out2, { transfer: [out2] })
}

const rs = new ReadableStream({
  pull (controller) {
    controller.byobRequest?.respond(0)
  },
  type: 'bytes'
})

cloneBody({ stream: rs })

How often does it reproduce? Is there a required condition?

always

What is the expected behavior? Why is that the expected behavior?

the process to close automatically

What do you see instead?

the process hangs

Additional information

this is needed for fetch.

[tsctx]

@KhafraDev
I believe this was fixed in the #51526 patch.
I have tested with a nightly build and this bug is not present.

[KhafraDev]

ngl I thought that already made it into 21.6.2