It believe this is caused by a std::unique_ptr in CClass::methodNamed being moved, resetting its raw pointer. The raw pointer, which now is null, is then returned from the method.
Created attachment 244983 [details] Patch
Created attachment 244988 [details] Patch
Comment on attachment 244988 [details] Patch r=me.
(In reply to comment #3) > Comment on attachment 244988 [details] > Patch > > r=me. Thanks!
Comment on attachment 244988 [details] Patch Clearing flags on attachment: 244988 Committed r178716: <http://trac.webkit.org/changeset/178716>
All reviewed patches have been landed. Closing bug.