import TysWiredIn ( ptrTyCon, funPtrTyCon, addrTyCon, unitTyCon )
import Unique ( Unique, Uniquable(..) )
import SrcLoc ( SrcLoc )
-import Util ( cmpList, thenCmp )
+import Util ( cmpList, thenCmp, equalLength )
import Maybes ( maybeToBool, expectJust )
import Outputable
\end{code}
-- Type constructors must match
uTysX (TyConApp con1 tys1) (TyConApp con2 tys2) k subst
- | (con1 == con2 && length tys1 == length tys2)
+ | (con1 == con2 && equalLength tys1 tys2)
= uTyListsX tys1 tys2 k subst
-- Applications need a bit of care!