drop states in block

src/main.rs

@@ -86,14 +86,15 @@ impl Downloader {
             .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()))?;
 
         // notify all waiters
-        let mut states = self.states.lock().await;
-        let state = states.remove(target_url).unwrap();
-        state.result.lock().await.replace(Ok(DownloadData {
-            body: body.clone(),
-            headers: headers.clone(),
-        }));
-        state.notify.notify_waiters();
-        drop(states);
+        {
+            let mut states = self.states.lock().await;
+            let state = states.remove(target_url).unwrap();
+            state.result.lock().await.replace(Ok(DownloadData {
+                body: body.clone(),
+                headers: headers.clone(),
+            }));
+            state.notify.notify_waiters();
+        }
 
         Ok(DownloadData { body, headers })
     }