This slipped from bug #181476, which changed the package name for Debian — but not for Arch where the issue was found first. Patch should be a one-liner :-)
Created attachment 337067 [details] Patch
Comment on attachment 337067 [details] Patch Clearing flags on attachment: 337067 Committed r230199: <https://trac.webkit.org/changeset/230199>
All reviewed patches have been landed. Closing bug.
<rdar://problem/39137527>