Can't retrieve data from Firestore when `swcMinify: true`

What version of Next.js are you using?

12.0.3

What version of Node.js are you using?

14

What browser are you using?

Chrome

What operating system are you using?

Linux

How are you deploying your application?

Vercel

Describe the Bug

I’m using Firebase version 9.4.1. I can’t get the data by running a query to my Firebase Firestore. This only happens when in production and I enable swcMinify in the next.config.js file.

So, to fix it I just disable the swcMinify feature and everything is back to normal.

Expected Behavior

Get data from my Firebase Firestore.

To Reproduce

I took just one example that I got from the official Firebase(version 9) documentation to retrieve all data from collections: https://firebase.google.com/docs/firestore/query-data/get-data#get_all_documents_in_a_collection. Then I added a bit of how I implemented it:

useEffect(() => {
	getUser(auth.id, user => {
		setUser(user)
	})
}, [auth])

In the next.config.js file we enable the swcMinify feature.

module.exports = {
  swcMinify: true
  // ....
}

Then, you can try running it in production with next build then next start.

[kalwabed]

I confirm that this issue has been resolved in 12.0.9-canary.4. Thanks for all the hard work 🙏

[PatrikTheDev]

I’m facing the exact same issue, Firestore stops functioning when deployed to Vercel with swcMinify turned on