[Webkit-unassigned] [Bug 262531] Safari v17 breaks `postMessage` with `ReadableStream`

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=262531

--- Comment #2 from Pascal Schilp <pascalschilp at gmail.com> ---
Its reproducible via:

const stream = new ReadableStream({
  start (controller) {
    controller.close()
  },
})

structuredClone(stream, { transfer: [stream] })

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