Don't qualify self as crate in add_missing_impl_members assist

crates/ide_assists/src/handlers/add_missing_impl_members.rs

@@ -812,4 +812,39 @@ impl Foo for () {
 "#,
         )
     }
+
+    #[test]
+    fn does_not_requalify_self_as_crate() {
+        check_assist(
+            add_missing_default_members,
+            r"
+struct Wrapper<T>(T);
+
+trait T {
+    fn f(self) -> Wrapper<Self> {
+        Wrapper(self)
+    }
+}
+
+impl T for () {
+    $0
+}
+",
+            r"
+struct Wrapper<T>(T);
+
+trait T {
+    fn f(self) -> Wrapper<Self> {
+        Wrapper(self)
+    }
+}
+
+impl T for () {
+    $0fn f(self) -> Wrapper<Self> {
+        Wrapper(self)
+    }
+}
+",
+        );
+    }
 }

crates/ide_db/src/path_transform.rs

@@ -101,8 +101,11 @@ impl<'a> Ctx<'a> {
         if path.qualifier().is_some() {
             return None;
         }
-        if path.segment().and_then(|s| s.param_list()).is_some() {
+        if path.segment().map_or(false, |s| {
+            s.param_list().is_some() || (s.self_token().is_some() && path.parent_path().is_none())
+        }) {
             // don't try to qualify `Fn(Foo) -> Bar` paths, they are in prelude anyway
+            // don't try to qualify sole `self` either, they are usually locals, but are returned as modules due to namespace classing
             return None;
         }