From 6e18b0ea6579eccc100485334f06d8d4e22acdf9 Mon Sep 17 00:00:00 2001
From: "zhaohaizhou.zhz" <zhaohaizhou.zhz@alibaba-inc.com>
Date: Thu, 12 Feb 2026 17:59:40 +0800
Subject: [PATCH] (fix): use default_factory for mutable SequencePackingConfig
 field.

---
 roll/configs/worker_config.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/roll/configs/worker_config.py b/roll/configs/worker_config.py
index 5ceb721a..57c8a49c 100644
--- a/roll/configs/worker_config.py
+++ b/roll/configs/worker_config.py
@@ -192,7 +192,7 @@ class WorkerConfig:
     )
 
     sequence_packing_args: SequencePackingConfig = field(
-        default= SequencePackingConfig(),
+        default_factory= SequencePackingConfig,
         metadata={
             "help": "Sequence packing related arguments "
         }