diff --git a/rustfmt.toml b/rustfmt.toml
index 58355ad5..a0729a75 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1,6 +1,7 @@
 edition = "2021"
 
 condense_wildcard_suffixes = true
+error_on_line_overflow = true
 format_code_in_doc_comments = true
 format_macro_bodies = true
 format_macro_matchers = true
diff --git a/src/api/client_server/report.rs b/src/api/client_server/report.rs
index 7bcf3f25..d9242f62 100644
--- a/src/api/client_server/report.rs
+++ b/src/api/client_server/report.rs
@@ -35,58 +35,61 @@ pub(crate) async fn report_event_route(
         ));
     };
 
-    services()
-        .admin
-        .send_message(message::RoomMessageEventContent::text_html(
-            format!(
-                "Report received from: {}\n\nEvent ID: {:?}\nRoom ID: {:?}\nSent \
-                 By: {:?}\n\nReport Score: {:?}\nReport Reason: {:?}",
-                sender_user, pdu.event_id, pdu.room_id, pdu.sender, body.score, body.reason
-            ),
-            format!(
-                r#"
-                <details>
-                    <summary>
-                        Report received from:
-                        <a href="https://matrix.to/#/{0:?}">{0:?}</a>
-                    </summary>
-                    <ul>
-                        <li>
-                            Event Info
-                            <ul>
-                                <li>
-                                    Event ID:
-                                    <code>{1:?}</code>
-                                    <a href="https://matrix.to/#/{2:?}/{1:?}">🔗</a>
-                                </li>
-                                <li>
-                                    Room ID:
-                                    <code>{2:?}</code>
-                                </li>
-                                <li>
-                                    Sent By:
-                                    <a href="https://matrix.to/#/{3:?}">{3:?}</a>
-                                </li>
-                            </ul>
-                        </li>
-                        <li>
-                            Report Info
-                            <ul>
-                                <li>Report Score: {4:?}</li>
-                                <li>Report Reason: {5}</li>
-                            </ul>
-                        </li>
-                    </ul>
-                </details>
-                "#,
-                sender_user,
-                pdu.event_id,
-                pdu.room_id,
-                pdu.sender,
-                body.score,
-                html_escape::encode_safe(body.reason.as_deref().unwrap_or(""))
-            ),
-        ));
+    services().admin.send_message(message::RoomMessageEventContent::text_html(
+        format!(
+            "Report received from: {}\n\nEvent ID: {:?}\nRoom ID: {:?}\nSent \
+             By: {:?}\n\nReport Score: {:?}\nReport Reason: {:?}",
+            sender_user,
+            pdu.event_id,
+            pdu.room_id,
+            pdu.sender,
+            body.score,
+            body.reason
+        ),
+        format!(
+            r#"
+            <details>
+                <summary>
+                    Report received from:
+                    <a href="https://matrix.to/#/{0:?}">{0:?}</a>
+                </summary>
+                <ul>
+                    <li>
+                        Event Info
+                        <ul>
+                            <li>
+                                Event ID:
+                                <code>{1:?}</code>
+                                <a href="https://matrix.to/#/{2:?}/{1:?}">🔗</a>
+                            </li>
+                            <li>
+                                Room ID:
+                                <code>{2:?}</code>
+                            </li>
+                            <li>
+                                Sent By:
+                                <a href="https://matrix.to/#/{3:?}">{3:?}</a>
+                            </li>
+                        </ul>
+                    </li>
+                    <li>
+                        Report Info
+                        <ul>
+                            <li>Report Score: {4:?}</li>
+                            <li>Report Reason: {5}</li>
+                        </ul>
+                    </li>
+                </ul>
+            </details>
+            "#,
+            sender_user,
+            pdu.event_id,
+            pdu.room_id,
+            pdu.sender,
+            body.score,
+            html_escape::encode_safe(body.reason.as_deref().unwrap_or(""))
+        ),
+    ));
 
     Ok(report_content::v3::Response {})
 }
diff --git a/src/database/abstraction/sqlite.rs b/src/database/abstraction/sqlite.rs
index f73ba509..1ddfff54 100644
--- a/src/database/abstraction/sqlite.rs
+++ b/src/database/abstraction/sqlite.rs
@@ -15,8 +15,10 @@ use super::{watchers::Watchers, KeyValueDatabaseEngine, KvTree};
 use crate::{database::Config, Result};
 
 thread_local! {
-    static READ_CONNECTION: RefCell<Option<&'static Connection>> = RefCell::new(None);
-    static READ_CONNECTION_ITERATOR: RefCell<Option<&'static Connection>> = RefCell::new(None);
+    static READ_CONNECTION: RefCell<Option<&'static Connection>> =
+        RefCell::new(None);
+    static READ_CONNECTION_ITERATOR: RefCell<Option<&'static Connection>> =
+        RefCell::new(None);
 }
 
 struct PreparedStatementIterator<'a> {
diff --git a/src/main.rs b/src/main.rs
index 407a01b0..cccc7ba4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -595,9 +595,15 @@ macro_rules! impl_ruma_handler {
                 for path in meta.history.all_paths() {
                     let handler = self.clone();
 
-                    router = router.route(path, on(method_filter, |$( $ty: $ty, )* req| async move {
-                        handler($($ty,)* req).await.map(RumaResponse)
-                    }))
+                    router = router.route(
+                        path,
+                        on(
+                            method_filter,
+                            |$( $ty: $ty, )* req| async move {
+                                handler($($ty,)* req).await.map(RumaResponse)
+                            }
+                        )
+                    )
                 }
 
                 router
diff --git a/src/service/admin.rs b/src/service/admin.rs
index 87b645f1..562d0ec3 100644
--- a/src/service/admin.rs
+++ b/src/service/admin.rs
@@ -243,7 +243,9 @@ impl Service {
                     Some(event) = receiver.recv() => {
                         let message_content = match event {
                             AdminRoomEvent::SendMessage(content) => content,
-                            AdminRoomEvent::ProcessMessage(room_message) => self.process_admin_message(room_message).await
+                            AdminRoomEvent::ProcessMessage(room_message) => {
+                                self.process_admin_message(room_message).await
+                            }
                         };
 
                         let mutex_state = Arc::clone(
diff --git a/src/service/rooms/state_cache.rs b/src/service/rooms/state_cache.rs
index bf4ce632..deaf1cc8 100644
--- a/src/service/rooms/state_cache.rs
+++ b/src/service/rooms/state_cache.rs
@@ -21,6 +21,8 @@ pub(crate) struct Service {
     pub(crate) db: &'static dyn Data,
 }
 
+type RoomsLeft = (OwnedRoomId, Vec<Raw<AnySyncStateEvent>>);
+
 impl Service {
     /// Update current membership data.
     #[tracing::instrument(skip(self, last_state))]
@@ -390,8 +392,7 @@ impl Service {
     pub(crate) fn rooms_left<'a>(
         &'a self,
         user_id: &UserId,
-    ) -> impl Iterator<Item = Result<(OwnedRoomId, Vec<Raw<AnySyncStateEvent>>)>> + 'a
-    {
+    ) -> impl Iterator<Item = Result<RoomsLeft>> + 'a {
         self.db.rooms_left(user_id)
     }