Chokidar does not detect files containing the word "undefined"

[brendon-stephens]

Describe the bug

Choidar does not detect files when the word "undefined" is contained within the file name.

Versions (please complete the following information):

• Chokidar version: v3.5.3
• Node version: v16.13.0
• OS version: Ubuntu 18, Windows 10

To Reproduce:

1. Create a folder named "upload" on the root directory.
2. Create two files - one named "test.json" another named "undefined.json"
3. Run the program below
4. Copy both "test.json" and "undefined.json" to the upload directory
5. Observe that only "test.json" is detected

const chokidar = require('chokidar');

const watcher = chokidar.watch('upload/*.json', {
    ignored: /(^|[\/\\])\../, // ignore dotfiles
    persistent: true
});

watcher.on('ready', () => console.log('Watching dir...'))
watcher.on('add', path => console.log(`File ${path} has been added`))

PS C:\Apps\Projects\Sandbox> node chokidar.js
Watching dir...
File upload\test.json has been added

Expected behavior The undefined.json file should be detected and notified via the 'add' event