Fix renaming associated trait items with colliding names

crates/ide/src/rename.rs

@@ -1716,6 +1716,25 @@ impl Foo for () {
         );
     }
 
+    #[test]
+    fn test_rename_trait_method_prefix_of_second() {
+        check(
+            "qux",
+            r#"
+trait Foo {
+    fn foo$0() {}
+    fn foobar() {}
+}
+"#,
+            r#"
+trait Foo {
+    fn qux() {}
+    fn foobar() {}
+}
+"#,
+        );
+    }
+
     #[test]
     fn test_rename_trait_const() {
         let res = r"

crates/ide_db/src/search.rs

@@ -544,7 +544,9 @@ impl<'a> FindUsages<'a> {
                     let trait_ = mod_def
                         .as_assoc_item(self.sema.db)?
                         .containing_trait_or_trait_impl(self.sema.db)?;
-                    (trait_ == this_trait).then(|| {
+                    (trait_ == this_trait
+                        && self.def.name(self.sema.db) == mod_def.name(self.sema.db))
+                    .then(|| {
                         let FileRange { file_id, range } = self.sema.original_range(name.syntax());
                         let reference = FileReference {
                             range,