diff --git a/App/lib/core/BuildPipeline.vp b/App/lib/core/BuildPipeline.vp
index 84bbf92..ce6d5e2 100644
--- a/App/lib/core/BuildPipeline.vp
+++ b/App/lib/core/BuildPipeline.vp
@@ -490,16 +490,19 @@ def init_llc_task(task: LlcTask | t.CPtr, ir_path: str, output_dir: str,
 
 
 def free_llc_task(task: LlcTask | t.CPtr):
-    """释放任务（命令串 + 记录）"""
+    """释放任务的命令串；记录本身是任务数组的连续槽（非独立 malloc），
+    由调用方对数组整体 stdlib.free（此前对槽 free 导致 double-free）"""
     if task is None:
         return
     if task.OptCmd is not None:
         stdlib.free(task.OptCmd)
+        task.OptCmd = None
     if task.LlcCmd is not None:
         stdlib.free(task.LlcCmd)
+        task.LlcCmd = None
     if task.ModuleSha1 is not None:
         stdlib.free(task.ModuleSha1)
-    stdlib.free(task)
+        task.ModuleSha1 = None
 
 
 def _llc_task_worker(arg: t.CPtr) -> t.CPtr: