diff --git a/includes/llvmlite/__function.vp b/includes/llvmlite/__function.vp
index 37b8d61..18a963b 100644
--- a/includes/llvmlite/__function.vp
+++ b/includes/llvmlite/__function.vp
@@ -165,15 +165,20 @@ def new_function(pool: memhub.MemBuddy | t.CPtr, name: t.CChar | t.CPtr,
 def function_add_param(func: Function | t.CPtr, param: Param | t.CPtr):
     """将参数追加到函数参数链表"""
     if func is None or param is None: return
-    if func.Params is None: return
-    func.Params.append(param)
+    # 注意：必须先用局部变量 + 类型参数（对齐 function_move_block_to_end 注释），
+    # 链式 func.Params.append() 会被编译器解析成 LinkedNode.append 且 this 前移
+    # sizeof(LinkedNode)（兄弟 Mixin 兜底误匹配），写穿容器前 48 字节破坏数据结构。
+    params: GSList[Param] | t.CPtr = func.Params
+    if params is None: return
+    params.append(param)
 
 
 def function_add_block(func: Function | t.CPtr, block: BasicBlock | t.CPtr):
     """将基本块追加到函数块链表"""
     if func is None or block is None: return
-    if func.Blocks is None: return
-    func.Blocks.append(block)
+    blocks: GSList[BasicBlock] | t.CPtr = func.Blocks
+    if blocks is None: return
+    blocks.append(block)
 
 
 def function_move_block_to_end(func: Function | t.CPtr, block: BasicBlock | t.CPtr):
@@ -221,8 +226,9 @@ def function_move_block_to_end(func: Function | t.CPtr, block: BasicBlock | t.CP
 def block_append_line(block: BasicBlock | t.CPtr, line: Line | t.CPtr):
     """将指令行追加到基本块"""
     if block is None or line is None: return
-    if block.Lines is None: return
-    block.Lines.append(line)
+    lines: GSList[Line] | t.CPtr = block.Lines
+    if lines is None: return
+    lines.append(line)
 
 
 def block_set_terminated(block: BasicBlock | t.CPtr, val: t.CInt):