testRunner API that takes in a completion handler should use async IPC, not sync IPC.
Created attachment 393767 [details] Patch
Comment on attachment 393767 [details] Patch The ios-wk2 bot test failures look unrelated.
Comment on attachment 393767 [details] Patch Clearing flags on attachment: 393767 Committed r258598: <https://trac.webkit.org/changeset/258598>
All reviewed patches have been landed. Closing bug.
<rdar://problem/60554986>