1 files changed, 11 insertions, 0 deletions

diff --git a/crates/hir_def/src/nameres.rs b/crates/hir_def/src/nameres.rs
index 9e8e4e9ec..6a09ad420 100644
--- a/crates/hir_def/src/nameres.rs
+++ b/crates/hir_def/src/nameres.rs
@@ -409,6 +409,17 @@ impl DefMap {
             }
         }
     }
+
+    fn shrink_to_fit(&mut self) {
+        self.extern_prelude.shrink_to_fit();
+        self.exported_proc_macros.shrink_to_fit();
+        self.diagnostics.shrink_to_fit();
+        self.modules.shrink_to_fit();
+        for (_, module) in self.modules.iter_mut() {
+            module.children.shrink_to_fit();
+            module.scope.shrink_to_fit();
+        }
+    }
 }
 
 impl ModuleData {