This happens in GTK+ port, because we don't use a drag image for links. It caused 10 crashes in the bots.
Created attachment 302247 [details] Patch
Committed r212711: <http://trac.webkit.org/changeset/212711>
(In reply to comment #0) > This happens in GTK+ port, because we don't use a drag image for links. By the way, that's terrible. We really should. I'm positive that somebody implemented this for us before, because I remember r-ing the patch years after it was posted.