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bug#57950: 29.0.50; value returned from (concat rcd-program-name List Re

From: Lars Ingebrigtsen
Subject: bug#57950: 29.0.50; value returned from (concat rcd-program-name List Report) is unused
Date: Tue, 20 Sep 2022 12:19:06 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) 
Jean Louis <bugs@gnu.support> writes:

> I don't think that this compiler error is alright:
>
> In rcd-db-list-mode:
> rcd-cf.el:254:4: Warning: value returned from (concat rcd-program-name List
>     Report) is unused
>
> for this:
>
> (define-derived-mode rcd-db-list-mode
>   tabulated-list-mode (concat rcd-program-name " List")
>   (concat rcd-program-name " List Report"))

In what way do you think the result from

  (concat rcd-program-name " List Report")

is used here?
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