Re: [Dev-luatex] Opening files in safer mode

On Tue, Oct 23, 2018 at 11:44 PM Marcel Krüger wrote:

Hi,

I think there is a bug in `io.open` in --safer mode:

\directlua{ io.open(tex.jobname .. '.tex'):close() } \bye

If this document is run with `luatex --safer` it leads to `bad argument #1 to 'gsub' (string expected, got nil)`.

The problem is a missing `not` in luatex-core.lua, function luatex_io_open_readonly: The default argument 'r' is used if an explicit argument is given and when no "how" argument is given it tries to interpret the non existing argument.

hm this is tricky.. we have to check it carefully, these "safer" modes are quite complicated things. -- luigi