fix: Disallow renaming of non-local items

crates/ide-db/src/rename.rs

@@ -71,12 +71,29 @@ impl Definition {
         sema: &Semantics<'_, RootDatabase>,
         new_name: &str,
     ) -> Result<SourceChange> {
+        // self.krate() returns None if
+        // self is a built-in attr, built-in type or tool module.
+        // it is not allowed for these defs to be renamed.
+        // cases where self.krate() is None is handled below.
+        if let Some(krate) = self.krate(sema.db) {
+            if !krate.origin(sema.db).is_local() {
+                bail!("Cannot rename a non-local definition.")
+            }
+        }
+
         match *self {
             Definition::Module(module) => rename_mod(sema, module, new_name),
+            Definition::ToolModule(_) => {
+                bail!("Cannot rename a tool module")
+            }
             Definition::BuiltinType(_) => {
                 bail!("Cannot rename builtin type")
             }
+            Definition::BuiltinAttr(_) => {
+                bail!("Cannot rename a builtin attr.")
+            }
             Definition::SelfType(_) => bail!("Cannot rename `Self`"),
+            Definition::Macro(mac) => rename_reference(sema, Definition::Macro(mac), new_name),
             def => rename_reference(sema, def, new_name),
         }
     }

crates/ide/src/rename.rs

@@ -2634,4 +2634,33 @@ use qux as frob;
         // ",
         //         );
     }
+
+    #[test]
+    fn disallow_renaming_for_non_local_definition() {
+        check(
+            "Baz",
+            r#"
+//- /lib.rs crate:lib new_source_root:library
+pub struct S;
+//- /main.rs crate:main deps:lib new_source_root:local
+use lib::S$0;
+"#,
+            "error: Cannot rename a non-local definition.",
+        );
+    }
+
+    #[test]
+    fn disallow_renaming_for_builtin_macros() {
+        check(
+            "Baz",
+            r#"
+//- minicore: derive, hash
+//- /main.rs crate:main
+use core::hash::Hash;
+#[derive(H$0ash)]
+struct A;
+            "#,
+            "error: Cannot rename a non-local definition.",
+        )
+    }
 }