Add assertions to help debug a WebProcessCache crash. <rdar://problem/48635439>
Created attachment 364032 [details] Patch
Comment on attachment 364032 [details] Patch Clearing flags on attachment: 364032 Committed r242652: <https://trac.webkit.org/changeset/242652>
All reviewed patches have been landed. Closing bug.
<rdar://problem/48720772>