Ah, my bad, sorry for the noise!
Le 18 août 2014 18:58, "Xavier Leroy" <Xavier.Leroy@inria.fr> a écrit :

> On 18/08/14 18:52, Thomas Braibant wrote:
>
> > Well, I was thinking about the following situation
> >
> >   let open Unix in
> >   let fd = openfile "foo.bar" [O_RDWR; O_TRUNC; O_CREAT] 0o640 in
> >   let o = out_channel_of_descr fd in
> >   let i = in_channel_of_descr fd in
> >   let i2 = in_channel_of_descr fd in
> >   Printf.printf "1\n%!";
> >   close_in i;
> >   Printf.printf "2\n%!";
> >   close_in i2;
> >   Printf.printf "3\n%!";
> >   close_out o;
> >   Printf.printf "Ok\n%!"
> >
> > that raises the fatal error: exception Sys_error("Bad file
> > descriptor"), and now, I do not understand your remark either :(.
>
> I said "close all your channels at once when you're done with the
> underlying file descriptor".  What you observe is that after the first
> close_in, all the other channels are unusable, because the underlying
> FD is closed.
>
> - Xavier Leroy
>
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