1 files changed, 1 insertions, 5 deletions
diff --git a/compiler/rustc_resolve/src/macros.rs b/compiler/rustc_resolve/src/macros.rs
index b1ea2d73786..1ee96f81e4f 100644
--- a/compiler/rustc_resolve/src/macros.rs
+++ b/compiler/rustc_resolve/src/macros.rs
@@ -286,7 +286,7 @@ impl<'a> ResolverExpand for Resolver<'a> {
                                     ext.helper_attrs.iter().map(|name| Ident::new(*name, span)),
                                 );
                                 if ext.is_derive_copy {
-                                    self.add_derive_copy(invoc_id);
+                                    self.containers_deriving_copy.insert(invoc_id);
                                 }
                                 ext
                             }
@@ -351,10 +351,6 @@ impl<'a> ResolverExpand for Resolver<'a> {
         self.containers_deriving_copy.contains(&expn_id)
     }
 
-    fn add_derive_copy(&mut self, expn_id: ExpnId) {
-        self.containers_deriving_copy.insert(expn_id);
-    }
-
     // The function that implements the resolution logic of `#[cfg_accessible(path)]`.
     // Returns true if the path can certainly be resolved in one of three namespaces,
     // returns false if the path certainly cannot be resolved in any of the three namespaces.