See https://github.com/tc39/ecma262/pull/525
This work has already been done and landed in change set r202490: <http://trac.webkit.org/changeset/202490>. *** This bug has been marked as a duplicate of bug 158505 ***
The kangax table at http://kangax.github.io/compat-table/es2016plus/ is showing that we are failing. I'll investigate whether it is our implementation or kangax.
(In reply to Michael Saboff from comment #2) > The kangax table at http://kangax.github.io/compat-table/es2016plus/ is > showing that we are failing. I'll investigate whether it is our > implementation or kangax. kangax/compat-table's initial feature test case was incorrect; fixed in https://github.com/kangax/compat-table/commit/432259e26ddc05488b6d2cb37e3c1a44edeed93d. *** This bug has been marked as a duplicate of bug 158505 ***