this is already caught by existing arm tests.
Created attachment 361935 [details] patch
Comment on attachment 361935 [details] patch r=me
Comment on attachment 361935 [details] patch Clearing flags on attachment: 361935 Committed r241475: <https://trac.webkit.org/changeset/241475>
All reviewed patches have been landed. Closing bug.
<rdar://problem/48053095>