The problem is that getChildren() calls childrenCount() which uses getChildren() causing a never ending recursive loop.
BTW fixing this would be great as this is causing ~100 crashes in the WK2 bot
Created attachment 163841 [details]
Here is the simple patch. Sorry for the hassle, and feel free to set cq+ when reviewing it (if approved)
Comment on attachment 163841 [details]
Clearing flags on attachment: 163841
Committed r128447: <http://trac.webkit.org/changeset/128447>
All reviewed patches have been landed. Closing bug.