Some users are hitting bugs when interacting with the Font selection system in WebKit clients. This was due to a blocked syscall.
<rdar://problem/49609201>
Created attachment 373156 [details] Patch
Comment on attachment 373156 [details] Patch Clearing flags on attachment: 373156 Committed r246949: <https://trac.webkit.org/changeset/246949>
All reviewed patches have been landed. Closing bug.