Node.js structuredClone objects do not preserve prototypes

[RedYetiDev]

When using structuredClone with and transferring the original in Node.js, the resulting clone's prototype is not the same as the original's. However, in other environments, the prototype remains consistent.

const original = new ReadableStream();
const transfer = structuredClone(original, { transfer: [original] });
console.log(Object.getPrototypeOf(transfer) === ReadableStream.prototype);

In Node.js, the above snippet logs false, however, in other environments, it logs true.

[RedYetiDev]

CC @nodejs/web-standards

[dnalborczyk]

In Node.js, the above snippet logs false, however, in other environments, it logs true.

the code snippet from above logs true in v18.20.4 and v20.17.0, and false for v22.9.0.

[RedYetiDev]

Interesting. I'll see if I can narrow down a specific commit. The issue starts with v22.0.0. @nodejs/v8 does this have something to do with V8? I can't reproduce in Chrome.

[targos]

It's probably caused by #50107

[RedYetiDev]

CC @H4ad