enable default bounds

Author: Bryanskiy

compiler/rustc_hir_analysis/src/astconv/bounds.rs

@@ -49,9 +49,7 @@ impl<'tcx> dyn AstConv<'tcx> + '_ {
         let tcx = self.tcx();
         let trait_id = tcx.lang_items().get(trait_);
 
-        if self.check_for_implicit_trait(trait_id, ast_bounds, self_ty_where_predicates)
-            && (trait_ == hir::LangItem::Sized || tcx.features().default_auto_traits)
-        {
+        if self.check_for_implicit_trait(trait_id, ast_bounds, self_ty_where_predicates) {
             // There was no `?Trait` or `!Trait` bound;
             // add `Trait` if it's available.
             bounds.push_lang_item_trait(tcx, self_ty, trait_, span);

compiler/rustc_hir_analysis/src/astconv/object_safety.rs

@@ -54,13 +54,11 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
             }
         }
         // FIXME: support polarity for trait objects
-        if tcx.features().default_auto_traits {
-            hir::lang_items::DEFAULT_TRAITS.iter().for_each(|default_trait| {
-                if *default_trait != hir::LangItem::Sized {
-                    bounds.push_lang_item_trait(tcx, dummy_self, *default_trait, span);
-                }
-            });
-        }
+        hir::lang_items::DEFAULT_TRAITS.iter().for_each(|default_trait| {
+            if *default_trait != hir::LangItem::Sized {
+                bounds.push_lang_item_trait(tcx, dummy_self, *default_trait, span);
+            }
+        });
 
         let mut trait_bounds = vec![];
         let mut projection_bounds = vec![];