Removing a handler may remove the last ref to this.
Created attachment 360330 [details] patch
<rdar://problem/47338669>
Created attachment 360331 [details] patch
Comment on attachment 360331 [details] patch r=me
Comment on attachment 360331 [details] patch Clearing flags on attachment: 360331 Committed r240578: <https://trac.webkit.org/changeset/240578>
All reviewed patches have been landed. Closing bug.