error: pubsub attribute should have a subscription name
  --> $DIR/attr-missing-subscription-name.rs:10:2
   |
10 |       /// Hello subscription
   |  _____^
11 | |     #[pubsub(subscribe, name = "hello_subscribe", alias("hello_sub"))]
12 | |     fn subscribe(&self, _: Self::Metadata, _: typed::Subscriber<String>, _: u64);
   | |_________________________________________________________________________________^

error: aborting due to previous error