This is being investigated into https://bugs.webkit.org/show_bug.cgi?id=202041.
Created attachment 379380 [details] Patch
The commit-queue encountered the following flaky tests while processing attachment 379380 [details]: fetch/fetch-worker-crash.html bug 187257 (author: youennf@gmail.com) The commit-queue is continuing to process your patch.
Comment on attachment 379380 [details] Patch Clearing flags on attachment: 379380 Committed r250250: <https://trac.webkit.org/changeset/250250>
All reviewed patches have been landed. Closing bug.
<rdar://problem/55635491>