Importing Symbol properties before Symbol from core-js/library breaks Symbol

[taion]

In a fresh session, run:

require('core-js/library/fn/symbol/async-iterator');
typeof require('core-js/library/fn/symbol');

The latter gives 'object'.

By contrast, if you just do

typeof require('core-js/library/fn/symbol');

This gives 'function' as expected.

This causes babel/babel#4783.

[zloirock]

Fixed in v3 branch.