{"ast_node_type":"variable","tokens":[{"end":71,"kind":"keyword","start":0,"text":"let"}]}
        let exn = self.context.new_cast(self.location, exn0, exn_type);
        let exn_type = exn0.get_type();
        let unwind_resume = self.context.get_target_builtin_function("__builtin_unwind_resume");