From 27be56fcebe8f4b03b9ab43157c6539958386966 Mon Sep 17 00:00:00 2001
From: blueloveTH <blueloveTH@foxmail.com>
Date: Thu, 19 Oct 2023 01:29:04 +0800
Subject: [PATCH] ...

---
 include/pocketpy/vm.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/pocketpy/vm.h b/include/pocketpy/vm.h
index 4989fa69..90e64c5d 100644
--- a/include/pocketpy/vm.h
+++ b/include/pocketpy/vm.h
@@ -593,6 +593,7 @@ inline PyObject* py_var(VM* vm, const char* val){
 
 template<>
 inline const char* py_cast<const char*>(VM* vm, PyObject* obj){
+    if(obj == vm->None) return nullptr;
     vm->check_non_tagged_type(obj, vm->tp_str);
     return PK_OBJ_GET(Str, obj).c_str();
 }