Don't use IE11's native getOwnPropertyDescriptor on objects like window.location

[Hypnosphi]

It throws "Object doesn't support this action" error

See babel/babel#10233 for context

[zloirock]

It's not an issue of core-js. In your example, babel helpers use Object.getOwnPropertyDescriptor on window.location. They call core-js wrapper of Object.getOwnPropertyDescriptor, but it's just a wrapper - you will have the same issue in IE11 even without core-js. IE11 Object.getOwnPropertyDescriptor can't work with environment exotic objects like window.location and, in the scope of core-js, we can't add special cases for all possible environment exotic objects.

Since it's not a core-js issue, I'll reopen the issue in the babel repo, but I don't think that it's something that should be solved on babel helpers side.

If you wanna just copy a URL, you could use just const locationCopy = new URL(window.location).

[Hypnosphi]

If you wanna just copy a URL, you could use just const locationCopy = new URL(window.location)

No, I'm actually extending the object: {...window.location, ...somethingElse}

[zloirock]

@Hypnosphi you could extend a copied location.