Iteration closing

[zloirock]

Hey, I wanna add compat data for Hermes to core-js for providing polyfill only then required zloirock/core-js#1099

Running the test case based on core-js feature detection shows that the actual version of Hermes does not support iteration closing and it causes the inclusion of heavy polyfills like Set, Map, WeakMap, etc. for wrapping their constructors for proper iteration closing when it's required.

However, it was supported in Hermes 0.3-.

[zloirock]

Missing Symbol.species support also causes the inclusion polyfills of Promise and most of Array methods, however, at least it's documented.

[tmikov]

Sincere apologies for responding a year late. We have revamped our internal processes and this should not happen again.

In our defense, this issue has been fixed in the next major release of Hermes for some time already.

[tmikov]

Update: after some bisecting, we found that it was also broken in Hermes v0.3. The change after v0.3 is that optimizations were enabled by default.

This doesn't affect the existing fix. We are working on back-porting the fix to Hermes-stable.

[tmikov]

Finally, fixed and closed!