warning: this function depends on never type fallback being `()` --> server/src/tests/ws.rs:551:7 | 551 | async fn custom_subscription_id_works() { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #123748 <https://github.com/rust-lang/rust/issues/123748> = help: specify the types explicitly note: in edition 2024, the requirement `!: jsonrpsee_core::server::IntoSubscriptionCloseResponse` will fail --> server/src/tests/ws.rs:572:4 | 572 | .register_subscription("subscribe_hello", "subscribe_hello", "unsubscribe_hello", |_, sink, _, _| async { | ^^^^^^^^^^^^^^^^^^^^^ = note: `#[warn(dependency_on_unit_never_type_fallback)]` on by default