Session crashes when trying to assign LED callback

[JSensebe]

When using the Genesis Plus GX core:

Exception ignored on calling ctypes callback function: <bound method DictEnvironmentDriver.environment of <libretro.drivers.environment.composite.CompositeEnvironmentDriver object at 0x0000023AAFE4DA60>>
Traceback (most recent call last):
  File "C:\Users\jsens\AppData\Roaming\Python\Python312\site-packages\libretro\drivers\environment\dict.py", line 44, in environment
    return self._envcalls[envcall](data)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\jsens\AppData\Roaming\Python\Python312\site-packages\libretro\drivers\environment\default.py", line 188, in <lambda>
    EnvironmentCall.GET_LED_INTERFACE: lambda data: self._get_led_interface(
                                                    ^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\jsens\AppData\Roaming\Python\Python312\site-packages\libretro\drivers\environment\composite.py", line 1003, in _get_led_interface
    self._led_cb = retro_led_interface(self.__set_led_state)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: expected CFunctionType instance, got method

This later leads to an access violation in run():

Traceback (most recent call last):
  File "C:\Users\jsens\Desktop\retro_test2.py", line 39, in <module>
    session.run() # Equivalent to one retro_run() call
  File "C:\Users\jsens\AppData\Roaming\Python\Python312\site-packages\libretro\session.py", line 326, in run
    self._core.run()
  File "C:\Users\jsens\AppData\Roaming\Python\Python312\site-packages\libretro\core.py", line 462, in run
    self._core.retro_run()
OSError: exception: access violation writing 0x00007FFC00000000

Calling with_led(None) when building the session gets around the issue.