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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: emacsclient in elisp
Date: Fri, 21 May 2021 10:07:21 +0300
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To: Jean Louis <bugs@gnu.support>
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In-Reply-To: <YKdSwqSBwi3qdL6t@protected.localdomain> (message from Jean Louis
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> Date: Fri, 21 May 2021 09:27:14 +0300
> From: Jean Louis <bugs@gnu.support>
> Cc: Eli Zaretskii <eliz@gnu.org>,
>   Daniel Mendler <mail@daniel-mendler.de>, emacs-devel@gnu.org
> 
> (defun tell-me ()
>   (read-from-minibuffer "")))
> 
> $ emacs -Q -l process-org.el --batch -f tell-me 
> 
> Debugger entered--Lisp error: (end-of-file)
>   read-from-string("")
>   tell-me()
>   command-line-1(("-l" "process-org.el" "-f" "tell-me"))
>   command-line()
>   normal-top-level()

Works for me.  And note that your backtrace says read-from-string, not
read-from-minibuffer.