TestWebKitAPI.ParserYieldTokenTests.AsyncScriptRunsWhenFetched seems flaky. In https://ews-build.webkit-uat.org/#/builders/19/builds/2256, the test Passed in run-api-tests step. However, in the immediately next retry step (re-run-api-tests), it Crashed.
Do you have the crash log?
Created attachment 365745 [details] Crash Log (In reply to Alexey Proskuryakov from comment #1) > Do you have the crash log? Attached.
It looks like window.eventMessages doesn't contain all four of the expected messages when this test fails.
<rdar://problem/50509874>
Are we still seeing this on EWS?