fast/workers/dedicated-worker-lifecycle.html is a flaky timeout
It is timing out on all platforms according to the flakiness dashboard.
The test will timeout with times ranging from 80-220 seconds. Usually it runs under 25 seconds on a pass.
The first timeout occured on this build: https://build.webkit.org/builders/Apple%20Sierra%20Release%20WK2%20(Tests)/builds/2796
I was able to reproduce the timeout locally and narrowed down the timeout starting between r219238-r219239
If this is proven to be caused by those revisions, please roll them out ASAP.
(In reply to Alexey Proskuryakov from comment #1)
> If this is proven to be caused by those revisions, please roll them out ASAP.
Already rolled out. See https://bugs.webkit.org/show_bug.cgi?id=174265.
*** This bug has been marked as a duplicate of bug 174265 ***