You should NOT see an active forward button.

============== Back Forward List ==============
        (file test):fast/loader/stateobjects/pushstate-clears-forward-history.html
        (file test):fast/loader/stateobjects/pushstate-clears-forward-history.html?a
curr->  (file test):fast/loader/stateobjects/pushstate-clears-forward-history.html?a
===============================================