Leo Alekseyev <dnquark@gmail.com> writes:

> Suppose I have a code block foo, and I want to call it several times
> in my org file.  However, foo may be a slow function, and so any time
> I evaluate buffer non-interactively (e.g. HTML export) I want to
> enable only one out of many calls to :foo
>
> The following doesn't work, but I think it should, since the #+call:
> line should run foo with the header argument :eval no-export
>
> #+NAME: foo
> #+BEGIN_SRC R :var turn_on_output="FALSE"
> if(turn_on_output) { X11() }
> #+END_SRC
>
> #+CALL: foo[:eval no-export](turn_on_output="TRUE")  ## this STILL
> evaluates on export
>

Thanks for sharing this example.  It indicated two bugs in the existing
code base.  I've just pushed up fixes for both bugs, the attached
Org-mode file can be used to confirm that this is now working.