[JSC] @defaultPromiseThen fast path should check species constructor
Created attachment 407587 [details] Patch
Created attachment 407588 [details] Patch
Comment on attachment 407588 [details] Patch r=me, now that I understand that we need to call @speciesConstructor from the enqueued job.
Mac-debug-wk1 failure and jsc failures are both flaky tests.
Committed r266346: <https://trac.webkit.org/changeset/266346>
<rdar://problem/68057111>