Different configurations watched same file returned same instance

[rickyes]

• Version:
• Platform: all
• Subsystem: fs

Using two different configurations watched the same file, the second configuration will not take effect.

What steps will reproduce the bug?

1. The process will exit.

const fs = require('fs');

fs.watchFile('a.js', {persistent: false} , () => {
  console.log(1)
});

fs.watchFile('a.js', () => {
  console.log(2)
});

2. The Process does not exit.

const fs = require('fs');

fs.watchFile('a.js', () => {
  console.log(2)
});

fs.watchFile('a.js', {persistent: false} , () => {
  console.log(1)
});

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

unrequired condition.

What is the expected behavior?

Neither 1 nor 2 will exit the process.

What do you see instead?

1. The process will exit.

Additional information

When watched, the StatWatcher instance is de-instanced by filename, and the same instance is returned each time the same file is watched.

[rickyes]

The problem I found when I solved #33096 .