Upgrade to Rust 1.85 and Rust 2024 edition.

There are a couple of migration suggestions from `cargo fix --edition` that I have deliberately skipped, which are intended to make sure that the changes to `if let` scoping don't bite us. They don't, I'm pretty sure, and if I turn out to be wrong, I'd rather fix the scoping issues (as they arise) than use `match` (`cargo fix --edition`'s suggestion).

This change also includes a bulk reformat and a clippy cleanup.

NOTA BENE: As this requires a new Rust toolchain, you'll need to update Rust (`rustup update`, normally) or the server won't build. This also applies to the Debian builder Docker image; it'll need to be rebuilt (from scratch, pulling its base image again) as well.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/broadcast.rs b/src/broadcast.rs
index bedc263..2792a18 100644
--- a/src/broadcast.rs
+++ b/src/broadcast.rs
@@ -1,8 +1,8 @@
 use std::sync::{Arc, Mutex};
 
-use futures::{future, stream::StreamExt as _, Stream};
-use tokio::sync::broadcast::{channel, Sender};
-use tokio_stream::wrappers::{errors::BroadcastStreamRecvError, BroadcastStream};
+use futures::{Stream, future, stream::StreamExt as _};
+use tokio::sync::broadcast::{Sender, channel};
+use tokio_stream::wrappers::{BroadcastStream, errors::BroadcastStreamRecvError};
 
 // Clones will share the same sender.
 #[derive(Clone)]
@@ -47,7 +47,7 @@ where
 
     // panic: if ``channel`` has not been previously registered, and was not
     // part of the initial set of channels.
-    pub fn subscribe(&self) -> impl Stream<Item = M> + std::fmt::Debug {
+    pub fn subscribe(&self) -> impl Stream<Item = M> + std::fmt::Debug + use<M> {
         let rx = self.sender().subscribe();
 
         BroadcastStream::from(rx).scan((), |(), r| {