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Re: master a7c65fc666: Allow nil value for filter-buffer-substring-funct


From: Stefan Monnier
Subject: Re: master a7c65fc666: Allow nil value for filter-buffer-substring-function
Date: Mon, 19 Sep 2022 17:58:02 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux)

> I don't see a good reason not to accept nil, though we don't need to

As I said, it breaks `add-function`.  If the var's value is nil

    (add-function :before filter-buffer-substring-function #'ignore)

will lead to errors, even though it should be harmless (as well as
useless, of course).


        Stefan




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