Next.js: [Next 9.5.4] Symbol.prototype.description polyfill raises TypeError

[uasi]

Bug report

Describe the bug

The Symbol.prototype.description polyfill raises TypeError in Safari 11 or any other browser that does not support Symbol.prototype.description natively.

To Reproduce

1. Open a web page that runs on Next.js 9.5.4 or 9.5.5 (https://nextjs.org is handy, or you can set up a starter app locally: npx create-next-app nextjs-blog --use-npm --example "https://github.com/vercel/next-learn-starter/tree/a24ee6c823/learn-starter" && cd nextjs-blog && npm install [email protected] && npm run dev)
2. Open developer tools
3. Enter Symbol.iterator.description in the console
4. TypeError: Cannot convert a symbol to a string is raised

Expected behavior

Symbol.iterator.description === 'Symbol.iterator'

Screenshots

System information

• OS: iOS 11.4
• Browser: Mobile Safari 11
• Version of Next.js: 9.5.4-9.5.5
• Version of Node.js: 12.10.0

Additional context

https://github.com/vercel/next.js/blob/1c4aecbeaf9de44cec3484f76d23ec8103f3bc50/packages/next-polyfill-module/src/index.js#L32-L38

/\((.+)\)/.exec(this)[1] will not work on any browser as RegExp.prototype.exec is spec'd to convert the argument to a string with the abstract operation ToString and ToString(symbol) throws a TypeError exception. See https://tc39.es/ecma262/#sec-regexp.prototype.exec and https://tc39.es/ecma262/#sec-tostring .

[prettyboyweiwei]

+1
"next": "^9.5" => "next": "9.5.3"

[jaydenseric]

Thanks to Sentry we're noticing a GTM script is crashing in production in Safari v11 due to this.

[artze]

I'm noticing a similar issue on my end with Next 9.5.4.

When I run Symbol.iterator.description like OP suggested, it errored on Chrome 61 - Chrome 65 (did not test 66 onwards). It was observed to be working without issues for Chrome 60, 59 and 58 (did not test versions older than this).

EDIT: Found that downgrading to Next 9.5.0 works

[Timer]

Could someone please send a PR fixing this?

[developit]

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