Just needs to use the new type syntax for JSCore.gir and bump the version number.
Created attachment 67298 [details] introspection.diff
Comment on attachment 67298 [details] introspection.diff Looks sane.
Comment on attachment 67298 [details] introspection.diff Landed as r67300.
Closing.
http://trac.webkit.org/changeset/67300 might have broken GTK Linux 32-bit Release