worker: parentPort.postMessage fails on undefined value

[legendecas]

• Version: 11.9.0
• Platform: all
• Subsystem: worker

parentPort.postMessage fails on assumption of not nil of first argument. Though it's documented as accepting any value.

internal/worker/io.js:65
  if (payload.type !== messageTypes.STDIO_WANTS_MORE_DATA)
              ^

TypeError: Cannot read property 'type' of undefined
    at MessagePort.onmessage (internal/worker/io.js:65:15)

full scripts:

const {
  Worker, isMainThread, parentPort, workerData
} = require('worker_threads')

if (isMainThread) {
    const worker = new Worker(__filename);
    worker.on('message', data => console.log('received worker data', data));
    worker.on('error', err => console.error('worker error:', error));
    worker.on('exit', (code) => {
      if (code !== 0)
        console.error(`Worker stopped with exit code ${code}`);
    })
    return
}

parentPort.postMessage(undefined)