let ty = traits::normalize_projection_type(
self,
param_env,
- ty::AliasTy { def_id: tcx.lang_items().deref_target()?, substs: trait_ref.substs },
+ tcx.mk_alias_ty(tcx.lang_items().deref_target()?, trait_ref.substs),
cause.clone(),
0,
// We're *intentionally* throwing these away,