2 files changed, 31 insertions, 23 deletions
diff --git a/compiler/rustc_builtin_macros/src/deriving/coerce_pointee.rs b/compiler/rustc_builtin_macros/src/deriving/coerce_pointee.rs
index 6082e376435..75db5d77783 100644
--- a/compiler/rustc_builtin_macros/src/deriving/coerce_pointee.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/coerce_pointee.rs
@@ -108,11 +108,7 @@ pub(crate) fn expand_deriving_coerce_pointee(
             cx.item(
                 span,
                 attrs.clone(),
-                ast::ItemKind::Impl(Box::new(ast::Impl {
-                    safety: ast::Safety::Default,
-                    polarity: ast::ImplPolarity::Positive,
-                    defaultness: ast::Defaultness::Final,
-                    constness: ast::Const::No,
+                ast::ItemKind::Impl(ast::Impl {
                     generics: Generics {
                         params: generics
                             .params
@@ -137,10 +133,16 @@ pub(crate) fn expand_deriving_coerce_pointee(
                         where_clause: generics.where_clause.clone(),
                         span: generics.span,
                     },
-                    of_trait: Some(trait_ref),
+                    of_trait: Some(Box::new(ast::TraitImplHeader {
+                        safety: ast::Safety::Default,
+                        polarity: ast::ImplPolarity::Positive,
+                        defaultness: ast::Defaultness::Final,
+                        constness: ast::Const::No,
+                        trait_ref,
+                    })),
                     self_ty: self_type.clone(),
                     items: ThinVec::new(),
-                })),
+                }),
             ),
         ));
     }
@@ -152,16 +154,18 @@ pub(crate) fn expand_deriving_coerce_pointee(
         let item = cx.item(
             span,
             attrs.clone(),
-            ast::ItemKind::Impl(Box::new(ast::Impl {
-                safety: ast::Safety::Default,
-                polarity: ast::ImplPolarity::Positive,
-                defaultness: ast::Defaultness::Final,
-                constness: ast::Const::No,
+            ast::ItemKind::Impl(ast::Impl {
                 generics,
-                of_trait: Some(trait_ref),
+                of_trait: Some(Box::new(ast::TraitImplHeader {
+                    safety: ast::Safety::Default,
+                    polarity: ast::ImplPolarity::Positive,
+                    defaultness: ast::Defaultness::Final,
+                    constness: ast::Const::No,
+                    trait_ref,
+                })),
                 self_ty: self_type.clone(),
                 items: ThinVec::new(),
-            })),
+            }),
         );
         push(Annotatable::Item(item));
     };
diff --git a/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs b/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs
index 3f4b47152c4..3fcf9da9450 100644
--- a/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs
@@ -826,21 +826,25 @@ impl<'a> TraitDef<'a> {
             )
         }
 
-        let opt_trait_ref = Some(trait_ref);
-
         cx.item(
             self.span,
             attrs,
-            ast::ItemKind::Impl(Box::new(ast::Impl {
-                safety: ast::Safety::Default,
-                polarity: ast::ImplPolarity::Positive,
-                defaultness: ast::Defaultness::Final,
-                constness: if self.is_const { ast::Const::Yes(DUMMY_SP) } else { ast::Const::No },
+            ast::ItemKind::Impl(ast::Impl {
                 generics: trait_generics,
-                of_trait: opt_trait_ref,
+                of_trait: Some(Box::new(ast::TraitImplHeader {
+                    safety: ast::Safety::Default,
+                    polarity: ast::ImplPolarity::Positive,
+                    defaultness: ast::Defaultness::Final,
+                    constness: if self.is_const {
+                        ast::Const::Yes(DUMMY_SP)
+                    } else {
+                        ast::Const::No
+                    },
+                    trait_ref,
+                })),
                 self_ty: self_type,
                 items: methods.into_iter().chain(associated_types).collect(),
-            })),
+            }),
         )
     }