diff --git a/App/lib/Stub/StubGen/Converter.vp b/App/lib/Stub/StubGen/Converter.vp
index b9f7fc3..bdc7dc5 100644
--- a/App/lib/Stub/StubGen/Converter.vp
+++ b/App/lib/Stub/StubGen/Converter.vp
@@ -442,8 +442,12 @@ def _PyiFunction(buf: bytes, buf_size: sizet, pos: sizet, fn: ast.FunctionDef*,
     if fn.decorator_list is not None:
         fn_decorator_list: list[ast.AST*]* = fn.decorator_list
         dn: sizet = len(fn_decorator_list)
-        for di in range(int(dn)):
-            dec: ast.AST* = fn_decorator_list.get(di)
+        # 循环变量改名：`di` 在下方默认值处理处被注解声明为 sizet（i64）。若这里先用
+        # `di`（range → int/i32）绑定，注解重声明就会与既有 i32 存储冲突 —— 编译器按
+        # fail-fast 报“带注解重声明冲突”，此前 TPC 是静默丢掉 store（生成的二进制在
+        # list[AST*].get 处越界读）。故装饰器循环变量改用 ddi。
+        for ddi in range(int(dn)):
+            dec: ast.AST* = fn_decorator_list.get(ddi)
             if dec is not None:
                 pos = _PyiIndent(buf, buf_size, pos, indent_level)
                 pos = _PyiEmit(buf, buf_size, pos, "@")