fix(method): list 特化缺方法时回退裸模板

list[AST*].get 等特化方法未生成时，回退调用 list.get，避免 Undefined method。

lib/core/Handles/HandlesExprCall.py

@@ -3921,6 +3921,22 @@ class ExprCallHandle(BaseHandle):
             adjusted = Gen._adjust_args(call_args_fb, func)
             result = Gen.builder.call(func, adjusted, name=f"call_{FullMethodName}")
             return result
+        if ClassName.startswith('list[') and ClassName in Gen.structs:
+            # 泛型特化方法未生成时，回退到裸模板 list 的同名方法
+            struct_type = Gen.structs[ClassName]
+            self_ptr_type = ir.PointerType(struct_type)
+            BareFuncName: str = f'list.{MethodName}'
+            func = Gen._find_function(BareFuncName)
+            if func is not None:
+                if isinstance(ObjVal.type, ir.PointerType) and ObjVal.type.pointee == struct_type:
+                    call_self = ObjVal
+                else:
+                    call_self = Gen.builder.bitcast(ObjVal, self_ptr_type, name=f"method_self_{ClassName}")
+                call_args_fb = [call_self] + CallArgs
+                self._fill_default_args(call_args_fb, func, BareFuncName)
+                self._append_eh_msg_out_arg(call_args_fb, func, Gen)
+                adjusted = Gen._adjust_args(call_args_fb, func)
+                return Gen.builder.call(func, adjusted, name=f"call_{BareFuncName}")
         raise Exception(f"Undefined method '{MethodName}' in class '{ClassName}' (no function declaration found for '{FullMethodName}')")
 
     def _EnsureReceiverStructConcrete(self, ClassName: str, class_sha1: str | None, ObjVal: Any, Gen: "LlvmGeneratorMixin") -> Any: