Example snippet does not behave like it should

[davidebombelli]

Affected URL(s)

https://nodejs.org/api/worker_threads.html#considerations-when-cloning-objects-with-prototypes-classes-and-accessors

Description of the problem

The following code is supposed to print {}:

const { port1, port2 } = new MessageChannel();

port1.onmessage = ({ data }) => console.log(data);

port2.postMessage(new URL('https://example.org'));

// Prints: { } 

However, when running it, it gives the following:

node:internal/per_context/domexception:76
 const self = new Error();
 ^

DOMException [DataCloneError]: Cannot clone object of unsupported type.
 at new DOMException (node:internal/per_context/domexception:76:18)
 at file:///my-folder-structure/test.mjs:6:7
 at ModuleJob.run (node:internal/modules/esm/module_job:377:25)
 at async onImport.tracePromise.__proto__ (node:internal/modules/esm/loader:691:26)
 at async asyncRunEntryPointWithESMLoader (node:internal/modules/run_main:101:5)