fix double drop on error of getting file metadata

actix-files/src/named.rs

@@ -195,9 +195,9 @@ impl NamedFile {
                 // SAFETY: fd is borrowed and lives longer than the unsafe block.
                 unsafe {
                     let fs = std::fs::File::from_raw_fd(fd);
-                    let md = fs.metadata()?;
+                    let res = fs.metadata();
                     std::mem::forget(fs);
-                    md
+                    res?
                 }
             }
         };

actix-files/src/service.rs

@@ -96,7 +96,7 @@ impl fmt::Debug for FilesService {
 impl Service<ServiceRequest> for FilesService {
     type Response = ServiceResponse;
     type Error = Error;
-    type Future = LocalBoxFuture<'static, Result<ServiceResponse, Error>>;
+    type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
 
     actix_service::always_ready!();