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From: Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups: gmane.emacs.help
Subject: Re: ~`symbol-function' to get code as list even when byte-compiled?
Date: Tue, 26 May 2015 16:34:14 -0400
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> Perhaps this is a better (safer) way to have it in but
> still out of action. I never contemplated the Boolean

Why have it out of action?  The Right Thing to do is to pass it along to fun:

   (defun add-one-shot-hook (hook fun)
     (let ((name (cl-gensym)))
       (setf (symbol-function name)
             (lambda (&rest args)
               (remove-hook hook name)
               (apply fun args)))
       (add-hook hook name)))


-- Stefan