In plan B, passing two stream IDs is failing. This should be reported through the API.
Created attachment 347988 [details] Patch
Created attachment 348024 [details] Patch
Comment on attachment 348024 [details] Patch Clearing flags on attachment: 348024 Committed r235327: <https://trac.webkit.org/changeset/235327>
All reviewed patches have been landed. Closing bug.
<rdar://problem/43693502>