From 185ec31a7125bdeef2bd04a73ceb2b4241e5afd2 Mon Sep 17 00:00:00 2001
From: benedikt-bartscher
 <31854409+benedikt-bartscher@users.noreply.github.com>
Date: Tue, 7 May 2024 03:35:25 +0200
Subject: [PATCH] do not access state __subclasses__, prevent issues with
 AppHarness (#3143)

---
 reflex/state.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/reflex/state.py b/reflex/state.py
index 4ee4fdb9a..08b110c09 100644
--- a/reflex/state.py
+++ b/reflex/state.py
@@ -881,7 +881,7 @@ class BaseState(Base, ABC, extra=pydantic.Extra.allow):
         cls.vars.update({name: var})
 
         # let substates know about the new variable
-        for substate_class in cls.__subclasses__():
+        for substate_class in cls.class_subclasses:
             substate_class.vars.setdefault(name, var)
 
         # Reinitialize dependency tracking dicts.