fast/forms/form-associated-element-crash.html is timing out on Mavericks WK1
Marked as occasional timeout in https://trac.webkit.org/r159510
If it's really only Mavericks you can use the [ Mavericks ] annotation (but I don't know why it would be).
See also: bug 122130.
I think that this was just a consequence of bug 122130.
*** This bug has been marked as a duplicate of bug 122130 ***