Reproduction steps: 1. Goto gmail.com 2. The page doesn't finish loading.
I didn't bisect this, but probably another victim of bump allocator (r94445).
(In reply to comment #1) > I didn't bisect this, but probably another victim of bump allocator (r94445). Yes, this is indeed a regression from r94445.
Fixed by http://trac.webkit.org/changeset/94522.