Why is this change causing SyntaxError?

[PabloDinella]

Hello, I was suffering from an infinite loop when running the firebase authentication example, which I was able to fix with an early return if the app is already on the route, but for some crazy reason, if I change the following line I get SyntaxError:

If I change if (!cookie) { to if (!cookie && router.route !== '/') {, or even if (false) {, I get:

It only works if I create a completely new if block:

    if (router.route !== '/') {
      return
    }
    if (!cookie) {
      router.push('/')
      return
    }

I've tested creating a new app from scratch with yarn create next-app --example with-firebase-authentication test and changing the line, same error.

What is happening? Do you guys get this error?