Currently it uses Uncountable, which gives us no information if we end up exiting due to a mismatched ClassInfo pointer. It should instead use BadType and should pass the correct JSValueSource and Node instead of passing empty values.
Created attachment 201438 [details] Patch
Comment on attachment 201438 [details] Patch r=me
Branch, please.
Committed r149943: <http://trac.webkit.org/changeset/149943>