Due to <rdar://problem/11806093>, re-exec of PluginService can sometimes (rarely) cause a kernel panic when switching from 64 bit to 32 bit. But this is not so rare on the bots.
Created attachment 245639 [details] proposed fix
Created attachment 245641 [details] with more project fixes
Comment on attachment 245641 [details] with more project fixes I don't see you removing passing the architecture to service. That can (and should) probably be ripped out.
Comment on attachment 245641 [details] with more project fixes Good point. Let's do that once we have a confirmation that this patch helped.
Comment on attachment 245641 [details] with more project fixes Clearing flags on attachment: 245641 Committed r179367: <http://trac.webkit.org/changeset/179367>
All reviewed patches have been landed. Closing bug.