Align Term methods with GenericArg methods

compiler/rustc_trait_selection/src/solve/assembly/structural_traits.rs

@@ -726,7 +726,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for ReplaceProjectionWith<'_, 'tcx> {
                     )
                     .expect("expected to be able to unify goal projection with dyn's projection"),
             );
-            proj.term.ty().unwrap()
+            proj.term.expect_type()
         } else {
             ty.super_fold_with(self)
         }

compiler/rustc_trait_selection/src/solve/normalizes_to/opaque_types.rs

@@ -17,7 +17,7 @@ impl<'tcx> EvalCtxt<'_, InferCtxt<'tcx>> {
     ) -> QueryResult<'tcx> {
         let tcx = self.interner();
         let opaque_ty = goal.predicate.alias;
-        let expected = goal.predicate.term.ty().expect("no such thing as an opaque const");
+        let expected = goal.predicate.term.as_type().expect("no such thing as an opaque const");
 
         match (goal.param_env.reveal(), self.solver_mode()) {
             (Reveal::UserFacing, SolverMode::Normal) => {