Reflect.has triggers getters on global object contextified by vm

[lachrist]

Version

v20.12.2

Platform

Darwin Laurents-MacBook-Air.local 23.2.0 Darwin Kernel Version 23.2.0: Wed Nov 15 21:59:33 PST 2023; root:xnu-10002.61.3~2/RELEASE_ARM64_T8112 arm64

Subsystem

vm

What steps will reproduce the bug?

import { createContext, runInContext } from "vm";
runInContext(
  `
    "use strict";
    Reflect.defineProperty(globalThis, "FOO", {
      get: () => {
        throw new Error("This should not get triggered");
      },
    });
    Reflect.has(globalThis, "FOO");
  `,
  createContext(),
);

How often does it reproduce? Is there a required condition?

All the time.

What is the expected behavior? Why is that the expected behavior?

Reflect.has should never trigger getter.

What do you see instead?

Reflect.has triggers getters for contextified global object. This is somehow similar to #52720 in that it makes contextified global objects break some invariants of the language.

In case anyone is wondering, I use vm to avoid having to spawn a new node process for each test cases of the test262 suite. These invariant breakages make some of them fail.

Maybe vm's contextified object are meant to be "magical" and I should stop reporting these issues. But then I feel this information would be a worthwhile addition to the doc.

Additional information

No response

[aduh95]

I'm not able to reproduce on the latest main. It looks like it's already been fixed, but the fix has not landed on 20.x.

[benjamingr]

Can confirm this repros on v20.12.2 but not on v22.0, I recall a fix (by @fhinkel ?) for something in that space a few months ago.

[lachrist]

Same here, this issue does not show on my setup on 22.0.0. I wrongly assumed it would have because of #52720

[legendecas]

The error is swallowed on v22.0.0 with d9c47e9. The getter is still getting invoked and side effects are observable.

This was fixed in #53517 since v22.5.0.