watchFile never fires when vfs uses a real dir

Version

main

Platform

macOS 26.2

Subsystem

vfs

What steps will reproduce the bug?

test.js:

const vfs = require('node:vfs');
const fs = require('fs');

const v = vfs.create(new vfs.RealFSProvider('/tmp'));

let called = false;
v.watchFile('/a.txt', { interval: 50 }, () => {
  called = true;
});

fs.writeFileSync('/tmp/a.txt', 'x');

setTimeout(() => {
  console.log('called?', called);
}, 300);

$ node --experimental-vfs test.js

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

Always

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

called? true

file changed, the listener should run

What do you see instead?

called? false

Additional information

No response

Commencez par test.js et les points d’entrée node:vfs pour RealFSProvider et watchFile, puis reproduisez le problème avec node --experimental-vfs test.js. Suivez la raison pour laquelle le listener n’est pas appelé après la modification de /tmp/a.txt ; c’est terminé lorsque l’exemple indique called? true.