The HashSet of all the radio buttons in the group seems to be null.
Created attachment 285389 [details]
Comment on attachment 285389 [details]
Clearing flags on attachment: 285389
Committed r204203: <http://trac.webkit.org/changeset/204203>
All reviewed patches have been landed. Closing bug.
*** Bug 173715 has been marked as a duplicate of this bug. ***