Exception ignored from cffi callback <function NgSpiceShared._background_thread_running at 0x000000004999c720>, trying to convert the result back to C:

Author: Kreijstal

PySpice/Spice/NgSpice/Shared.py

@@ -709,6 +709,7 @@ def _background_thread_running(is_running, ngspice_id, user_data):
         self = ffi.from_handle(user_data)
         self._logger.debug('ngspice_id-{} background_thread_running {}'.format(ngspice_id, is_running))
         self._is_running = is_running
+        return 0
 
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