[NTG-context] printing tab in lua: print('a\tb') fails

Hello, Here's a tiny question. The following command complains about undefined control sequence. \starttext \startluacode print('a\tb') \stopluacode hello \stoptext There is a workaround: print(string.format('a\t%s', 'b')) but I find it weird. Even if the line above gets commented out with two dashes it still complains. I understand approximately why this happens, but is that intended? Should I be using something else than \startluacode in the plethora of different lua triggering commands? Thanks, Mojca