bug#23648: [PATCH] `defun-declarations-alist' can be unintentionally modified

[Eli Zaretskii <eliz@gnu.org>]

> From: Noam Postavsky <npostavs@users.sourceforge.net>
> Date: Thu, 21 Jul 2016 17:27:49 -0400
> Cc: Michael Heerdegen <michael_heerdegen@web.de>, 23648@debbugs.gnu.org, 
> 	Paul Pogonyshev <pogonyshev@gmail.com>
> 
> > So I'm still looking for the answer to the "how probable" question.  I
> > need that to make up my mind about the urgency of the fix.
> 
> Ah, okay. The probability of a user hitting this depends on how likely
> they are to perform completion inside a declare form. This depends on
> the kind of code the user writes, so it's hard to put a number on it.
> Also, if the user has a package like company enabled that performs
> completion during idle time, then just moving point through a declare
> form should be enough to trigger it, so in this case it might depend
> also on the kind of code the user reads. If the user never opens an
> elisp file with declare forms, then they certainly won't hit this.
> 
> Once the user has triggered the problem via completion, all
> compilation of defuns (e.g. during package installation/upgrade) with
> declare forms will be broken (as well as loading uncompiled defuns
> with declare forms). Admittedly only gv-expander (along with
> gv-setter, but that one doesn't get unlearned) is vital to correct
> compilation, the rest (advertised-calling-convention obsolete
> interactive-only pure side-effect-free compiler-macro doc-string
> indent) are only optimizations or advisory in nature.

OK, let's push to emacs-25.  Thanks.