explicitely drop the search permit

meilisearch/src/routes/multi_search.rs

@@ -39,7 +39,7 @@ pub async fn multi_search_with_post(
 ) -> Result<HttpResponse, ResponseError> {
     // Since we don't want to process half of the search requests and then get a permit refused
     // we're going to get one permit for the whole duration of the multi-search request.
-    let _permit = search_queue.try_get_search_permit().await?;
+    let permit = search_queue.try_get_search_permit().await?;
 
     let federated_search = params.into_inner();
 
@@ -162,6 +162,7 @@ pub async fn multi_search_with_post(
             HttpResponse::Ok().json(SearchResults { results: search_results })
         }
     };
+    permit.drop().await;
 
     Ok(response)
 }