fail safely when pickling (#4085)

* fail safely when pickling

* why did i do that

reflex/state.py

@@ -1958,7 +1958,14 @@ class BaseState(Base, ABC, extra=pydantic.Extra.allow):
         Returns:
             The serialized state.
         """
+        try:
             return pickle.dumps((state_to_schema(self), self))
+        except pickle.PicklingError:
+            console.warn(
+                f"Failed to serialize state {self.get_full_name()} due to unpicklable object. "
+                "This state will not be persisted."
+            )
+            return b""
 
     @classmethod
     def _deserialize(
@@ -2812,6 +2819,7 @@ class StateManagerDisk(StateManager):
         self.states[substate_token] = substate
 
         state_dilled = substate._serialize()
+        if state_dilled:
             if not self.states_directory.exists():
                 self.states_directory.mkdir(parents=True, exist_ok=True)
             self.token_path(substate_token).write_bytes(state_dilled)
@@ -3107,6 +3115,7 @@ class StateManagerRedis(StateManager):
         if state._get_was_touched():
             pickle_state = state._serialize()
             self._warn_if_too_large(state, len(pickle_state))
+            if pickle_state:
                 await self.redis.set(
                     _substate_key(client_token, state),
                     pickle_state,