[Dev-luatex] Is \toksapp assignment?

Hello, If I try: \def\test{test} \afterassignment\test \advance\count0 by2 then \test is processed immediately after the \advance command. But if I do: \afterassignment\test \toksapp 0{xx}  \the\toks0 then \test waits to another assignment than \toksapp. It means, that \toksapp <toks> (and friends \gtoksapp etc.) is not assignment. Is it an intention or a bug? Petr Olšák