Why does await WebAssembly.instantiate(buffer, {importObject}) in AudioWorkletGlobalScope throw for AudioWorkletNode construction?

[guest271314]

This code will throw

await WebAssembly.instantiate(buffer, {
    js: { mem: memory },
  }).then((obj) => {
  const i32 = new Uint32Array(memory.buffer);
  for (let i = 0; i < 10; i++) {
    i32[i] = i;
  }
  const sum = obj.instance.exports.accumulate(0, 10);
  return sum;
  });
class AudioWorkletStream extends AudioWorkletProcessor {
  constructor(options) {
    super();
    console.log(this, options);
  }
  process(inputs, outputs) {
    return true;
  }
}
registerProcessor('audio-worklet-stream', AudioWorkletStream);

Uncaught (in promise) DOMException: Failed to construct 'AudioWorkletNode': AudioWorkletNode cannot be created: The node name 'audio-worklet-stream' is not defined in AudioWorkletGlobalScope.

The node named 'audio-worklet-stream' is defined in AudioWorkletGlobalScope.

Why is the named node not found when await await WebAssembly.instantiate() is called before registerProcessor()?