Hi Vladimir,

On Mon, 21 Oct 2019 at 03:21, Vladimir Nikishkin <lockyw...@gmail.com>
wrote:

>
> Can we replace the (set) on line 177 of ob-scheme.el with the following
> form:
> (setq result (if output
>                  (let ((g-r-o (geiser-eval--retort-output ret)))
>                  (if g-r-o
>                      g-r-o
>                      "Geiser-eval--retort-output returned nil.\nThe
> interpreter produced no output\nor there is a bug in geiser (likely!)"))
> (geiser-eval--retort-result-str ret "")))))
>
> I am not super sure about what's going on there, but I think that output
> can never be an empty list, because in the worst case it is an empty
> string.
> (But I wouldn't vouch for this.)
>

Can you explain more?  Have you seen cases
where (geiser-eval--retort-output ret) returns nil, even though you say
just above that it can never do that?

Best wishes,
    Neil

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