RunLoop::initializeMainRunLoop is called a few times in WKContentView.mm initialization right after InitializeWebKit2. InitializeWebKit2 already handles initializing the main run loop.
Created attachment 223378 [details] [PATCH] Proposed Fix
Comment on attachment 223378 [details] [PATCH] Proposed Fix Clearing flags on attachment: 223378 Committed r163572: <http://trac.webkit.org/changeset/163572>
All reviewed patches have been landed. Closing bug.