2 files changed, 3 insertions, 0 deletions

diff --git a/crates/hir/src/code_model.rs b/crates/hir/src/code_model.rs
index 5020aa196..285905e96 100644
--- a/crates/hir/src/code_model.rs
+++ b/crates/hir/src/code_model.rs
@@ -989,6 +989,7 @@ impl MacroDef {
         if self.is_proc_macro() {
             return None;
         }
+        #[allow(deprecated)]
         self.source_old(db).value.name().map(|it| it.as_name())
     }
 
@@ -1378,6 +1379,7 @@ impl Impl {
     }
 
     pub fn is_builtin_derive(self, db: &dyn HirDatabase) -> Option<InFile<ast::Attr>> {
+        #[allow(deprecated)]
         let src = self.source_old(db);
         let item = src.file_id.is_builtin_derive(db.upcast())?;
         let hygenic = hir_expand::hygiene::Hygiene::new(db.upcast(), item.file_id);
diff --git a/crates/hir/src/has_source.rs b/crates/hir/src/has_source.rs
index 84fbeca75..8a7306def 100644
--- a/crates/hir/src/has_source.rs
+++ b/crates/hir/src/has_source.rs
@@ -16,6 +16,7 @@ use crate::{
 
 pub trait HasSource {
     type Ast;
+    #[deprecated = "migrating to source() method that returns an Option"]
     fn source_old(self, db: &dyn HirDatabase) -> InFile<Self::Ast>;
     fn source(self, db: &dyn HirDatabase) -> Option<InFile<Self::Ast>>;
 }