Intl-NumberFormat : TypeError on old browsers (introduced in 6.1.6)

[Donov4n]

Which package?

https://github.com/formatjs/formatjs/tree/main/packages/intl-numberformat

Describe the bug

In intl-numberformat version 6.1.6 a "breaking change" has been introduced for old browsers that does not support overwriting the name property on functions.

The following error is thrown since v6.1.6 : Uncaught TypeError: Cannot redefine property: name.

The bug seems to be identifical to the one referenced in this issue in another polyfill repo..

To Reproduce

Steps to reproduce the behavior:

1. Import the intl-numberformat polyfill
2. Open a page with an old browser, f.e. Chrome 31
3. See error in console.

Expected behavior

Like in version prior to 6.1.6, the polyfill should be usable on old browsers.

Desktop (please complete the following information):

• OS: Ubuntu 14.04
• Browser Chrome
• Version 31