The following layout test is flaky on Sierra Release WK2
Test is only showing flakiness on this platform. flakiness is there for the whole history and the test isn't new
@@ -1,6 +1,6 @@
Test MessagePort messaging/entangle/detangle across threads. Should print "SUCCESS" when done.
PASS: Received request for 50000 messages
-SUCCESS - received 50000 messages.
+FAILURE: Received: 0 events - expected: 50000
Marked test flakey on Sierra only: https://trac.webkit.org/changeset/238191/webkit
unmarked test as flakey as history is clean now. https://trac.webkit.org/changeset/244888/webkit