diff --git a/judger/src/worker/mod.rs b/judger/src/worker/mod.rs
index 2bfdeab..07477e1 100644
--- a/judger/src/worker/mod.rs
+++ b/judger/src/worker/mod.rs
@@ -142,8 +142,8 @@ impl JudgeWorker {
             }
             Err(anyhow::anyhow!("Failed to new builder result: {:?}", e))
         });
-        if new_builder_result.is_err() {
-            return new_builder_result.unwrap_err();
+        if let Err(result) = new_builder_result {
+            return result
         }
         let builder = new_builder_result.expect("builder creater error");
         log::debug!("Builder created: {:?}", builder);