[FIX] fastapi: Ensures inner exception is reset

Author: lmignon

fastapi/fastapi_dispatcher.py

@@ -52,6 +52,7 @@ def handle_error(self, exc):
     def _make_response(self, status_mapping, headers_tuple, content):
         self.status = status_mapping[:3]
         self.headers = headers_tuple
+        self.inner_exception = None
         # in case of exception, the method asgi_done_callback of the
         # ASGIResponder will trigger an "a2wsgi.error" event with the exception
         # instance stored in a tuple with the type of the exception and the traceback.