change usages of type_of to bound_type_of

compiler/rustc_mir_transform/src/const_prop_lint.rs

@@ -57,7 +57,7 @@ impl<'tcx> MirLint<'tcx> for ConstProp {
             return;
         }
 
-        let is_generator = tcx.type_of(def_id.to_def_id()).is_generator();
+        let is_generator = tcx.bound_type_of(def_id.to_def_id()).subst_identity().is_generator();
         // FIXME(welseywiser) const prop doesn't work on generators because of query cycles
         // computing their layout.
         if is_generator {